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ICF-CD843V
SERVICE MANUAL
Ver 1.0 2004.02

US Model

Model Name Using Similar Mechanism Optical Pick-up Block Name Optical Pick-up Name

ICF-CD853V KSM-213RDP KSS-213R

SPECIFICATIONS
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION With 4-ohm loads, both channels driven from 100 - 10 000 Hz; rated 1.0 W per channel-minimum RMS power, with no more than 10% total harmonic distortion in AC operation.

General
Time display: 12-hour system Speaker: 66 mm (2 5/8 inches) dia., 4 Power outputs: 1.2 W + 1.2 W (at 10% harmonic distortion) Power requirements: 120 V AC, 60 Hz Dimensions: Approx. 185.5 × 176 × 210.5 mm (w/h/d) (Approx. 7 3/8 × 7 × 8 3/8 inches) incl. projecting parts and controls Mass: Approx. 1 780 g (3 lb 15 oz) Design and specifications are subject to change without notice.

CD player section
System: Compact disc digital audio system Laser diode properties: Material: GaAlAs Wavelength: 780 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.) +1 Frequency response: 20-20 000 Hz -1.5 dB Wow and flutter: Below measurable limit

Radio section
Frequency range: TV: 2 - 13 ch WEATHER: 1 - 7 ch FM: 87.5 - 108 MHz AM: 530 - 1 710 kHz

TV/WEATHER/FM/AM CD CLOCK RADIO
9-877-625-01
2004B05-1 C 2004.02

Sony Corporation
Personal Audio Company Published by Sony Engineering Corporation

ICF-CD843V

TABLE OF CONTENTS 1. 2. 3.
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7.

SERVICING NOTES .............................................. GENERAL .................................................................. DISASSEMBLY
Disassembly Flow ........................................................... Rear Cabinet Assy ........................................................... CD Lid ............................................................................. Upper Cabinet Assy ........................................................ MAIN Board ................................................................... CD Block ......................................................................... Optical Pick-up (KSS-213R) ..........................................

3 4

SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set

5 6 6 7 7 8 8

4.

ELECTRICAL ADJUSTMENTS
Tuner Section ................................................................. 9 CD Section ..................................................................... 11

5.

DIAGRAMS
12 13 14 16 17 18 19 20 21 22 23

5-1. Block Diagram ­ CD Section ­ .................................... 5-2. Block Diagram ­ MAIN Section ­ ............................... 5-3. Note for Printed Wiring Board and Schematic Diagrams ....................................................... 5-4. Printed Wiring Board ­ CD Section ­ .......................... 5-5. Schematic Diagram ­ CD Section ­ ............................. 5-6. Printed Wiring Board ­ MAIN Section ­ ..................... 5-7. Printed Wiring Boards ­ POWER Section ­ ................ 5-8. Schematic Diagram ­ MAIN section (1/2) ­ ............... 5-9. Schematic Diagram ­ MAIN section (2/2) ­ ............... 5-10. Printed Wiring Boards ­ PANEL Section ­ ................. 5-11. Schematic Diagram ­ PANEL Section ­ ......................

6.
6-1. 6-2. 6-3. 6-4. 6-5.

EXPLODED VIEWS
Cabinet Section ............................................................... Upper Cabinet Section .................................................... Front Cabinet Section ..................................................... Rear Cabinet Section ...................................................... Optical Pick-up Section (KSM-213RDP) ...................... 27 28 29 30 31

0.15 µF

1.5 k

AC voltmeter (0.75 V)

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

7.

ELECTRICAL PARTS LIST .............................. 32
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
About CD-Rs/CD-RWs This unit is compatible with CD-Rs/CD-RWs but playback capability may vary depending on the quality of the disc, the recording device and application software.

Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

2

ICF-CD843V SECTION 1 SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK During normal operation of the equipment, emission of the laser diode is prohibited unless the upper lid is closed while turning ON the S302. (push switch type) The following checking method for the laser diode is operable. · Method Emission of the laser diode is visually checked. 1. Open the upper lid. 2. Push the S302 as shown in Fig.1.
Note: Do not push the detection lever strongly, or it may be bent or damaged. 3. Press the CD u button.

CHUCK PLATE JIG ON REPAIRING On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig. · Code number of Chuck Plate Jig: X-4918-255-1

4. Check the object lens for confirming normal emission of the laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. In this operation, the object lens will move up and down 2 times along with inward motion for the focus search.

S302

Fig.1 Method to push the S302

3

ICF-CD843V SECTION 2 GENERAL
2
Press ALARM SET RADIO for a few seconds.
ALARM and RADIO appear on the display. After one beep, ALARM and the hour will start to flash on the display.

This section is extracted from instruction manual.
The display shows the snooze time for a few seconds and returns to show the current time. When you press SNOOZE·DATE/SLEEP OFF after the current time appears, the snooze time starts from 10 minutes again. The maximum length of the snooze time is 60 minutes.

3

Press TUNE/TIME SET + or desired hour appears.

until the

To set the hour rapidly, hold down TUNE/TIME SET + or

ALARM OFF--
The CD, radio, or buzzer alarm is turned off automatically after 60 minutes.

4 5
The PRESET TUNING 3 button has a tactile dot. FM wire antenna There is a tactile dot beside volume to show the direction to turn up the volume.

Press ALARM SET RADIO.
The minute will flash.

To Stop the Alarm
Press OFF x·ALARM RESET to turn off the alarm. The alarm will come on again at the same time the next day.

Repeat step 3 to set the minute and press ALARM SET RADIO.
WAKE UP STA appears and the preset number flashes on the display.

To Deactive the Alarm
Press ALARM MODE repeatedly until CD/RADIO/ BUZZER indicator go off.

6

Press TUNE/TIME SET + or the wake-up station.
P AM P1 to 5 TV P1 to 5

to select

Preset number changes in the order as follows:
FM1 P1 to 5 FM2 P1 to 5

AC power cord

WEATHER P1 to 5

Setting the Sleep Timer
You can fall asleep to the CD or the radio using the automatically after a preset duration. Press SLEEP during CD or radio play. You can set the sleep timer to durations of 90, 60, 30, or 15 minutes. Every push changes the display as follows:
off (current time) 15 90 30 60

P- is the last received station. You can directly select the desired wake-up station by pressing RADIO·BAND or the PRESET TUNING button while the indication P- is not displayed.

7

Press ALARM SET RADIO.
Two short beeps will confirm the setting.

To Set the Buzzer Alarm: 1 Press ALARM SET BUZZER for a few
seconds.
ALARM and BUZZER appear on the display. After one beep, ALARM and the hour will start to flash on the display.

SLEEP will appear in the display when the duration time is set. The CD or the radio will play for the time you set, then shut off. To turn off the CD or the radio before the preset time, press SNOOZE·DATE/SLEEP OFF.

2

Press TUNE/TIME SET + or desired hour appears.

until the

To set the hour rapidly, hold down TUNE/TIME SET + or

3 4

Press ALARM SET BUZZER.
The minute will flash.

Repeat step 2 to set the minute and press ALARM SET BUZZER.
Two short beeps will confirm the setting.

To Set the Alarm Mode
The CD u button has a tactile dot.
To change the display to the daylight saving time (summer time) indication Press D.S.T./SUMMER T. is displayed and the time indication changes to summer time. To deactivate the summer time function, press D.S.T./SUMMER T. again. Before setting the alarm mode, be sure to set the alarm time. (See To Set the Alarm Time .) Repeat the pressing of ALARM MODE to select the alarm mode you want. Every time you press ALARM MODE, CD/RADIO/BUZZER indicator changes in the order as follows:

Features
· TV/WEATHER/FM/AM 4 band PLL (phase locked loop) synthesized clock radio · Easy preset digital tuning with 25 memory presets · Built-in CD player with CD-R/RW playback function · Easy to see large Display with small footprint. · Triple Alarm (Radio, buzzer or CD) with the extendable snooze function. · Easy nap timer --one push operation. · LCD with backlight which has a brightness control switch. · D .S.T. (Daylight Saving Time) -Summer time calculation.

CD RADIO BUZZER OFF CD+RADIO CD+BUZZER RADIO+BUZZER CD+RADIO+BUZZER
The alarm time which plays or sounds next is displayed.

Setting the Alarm
This clock radio is equipped with 3 alarm modes- CD, radio and buzzer. Before setting the alarm, make sure to set the clock (see Setting the Clock and Date ).

To Set the Alarm Time To Set the CD Alarm:
For the CD alarm, the track you specified as the Wake-up track is played first. (If the CD play mode is set to SHUFFLE or SHUFFLE REP , however, all the tracks are played in random order.)

Setting the Brightness of the Backlight
Press BRIGHTNESS to select high, middle or low for the display according to your preference.

To Check the Alarm Setting
For ALARM SET CD, pressing once displays the alarm time, pressing twice displays the wake-up track number. For ALARM SET RADIO, pressing once displays the alarm time, pressing twice displays the wake-up station. For ALARM SET BUZZER, pressing once displays the alarm time. The display shows the alarm setting for a few seconds and then returns to the previous display. Alarm time in CD alarm, radio alarm and buzzer alarm is set at AM 12:00 when you purchased the unit.

1

Setting the Clock and Date
1 2 3 4 5
Plug in the clock radio.
The display will flash AM 12:00 .

With the alarm turned on, adjust the volume to the level you require. Press ALARM SET CD for a few seconds.
ALARM , CD appear on the display. After one beep, ALARM and the hour will start to flash in the display.

2

Press CLOCK for a few seconds.
You will hear a beep and the year will start to flash in the display.

3

Press TUNE/TIME SET + or desired hour appears.

until the

To set the hour rapidly, hold down TUNE/TIME SET + or

ALARM ON--
If you set the CD alarm and there is no disc in the CD player, the buzzer alarm will sound in its place at the time set. For the buzzer alarm, the beeping of the alarm becomes more rapid after every few seconds in three progressive stages. Note When CD, radio and buzzer alarms are set for the same time, the CD alarm takes precedence. If the CD alarm is not set, the radio alarm takes precedence.

Press TUNE/TIME SET + or until the correct year appears in the display. Press CLOCK once. Repeat steps 3 and 4 to set the month, day, hour, and minute.
After setting the minutes, press CLOCK to start the clock, and you will hear two short beeps.

4 5 6 7

Press ALARM SET CD.
The minute will flash.

Repeat step 3 to set the minute and press ALARM SET CD.
The wake-up track number flashes on the display.

Press TUNE/TIME SET + or to select the desired wake-up track number.
The wake-up track number can be set up to 99.

To display the year and date, press SNOOZE·DATE/SLEEP OFF once for the date, and within 4 seconds press it again for the year. The display shows the date or year for a few seconds and then changes back to the current time. To set the current time rapidly, hold down TUNE/TIME SET + or . In step 5, when you press CLOCK after the minute setting to activate the clock, the seconds start counting from zero.

Press ALARM SET CD.
Two short beeps will confirm the setting.

To Doze for a Few More Minutes
Press SNOOZE·DATE/SLEEP OFF. The CD, radio or buzzer alarm turns off but will be automatically activated again after about 10 minutes. Every time you press SNOOZE·DATE/SLEEP OFF, the snooze time changes as follows:

To Set the Radio Alarm:
For the radio alarm, the station you specified as the Wake-up station is played.

1

Tune into a station and adjust the volume.

10

20 40

30 50 60

4

ICF-CD843V SECTION 3 DISASSEMBLY
· This set can be disassembled in the order shown below.

3-1.

DISASSEMBLY FLOW
SET

3-2. Rear Cabinet Assy (Page 6)

3-4. Upper Cabinet Assy (Page 7)

3-3. CD Lid (Page 6)

3-5. MAIN Board (Page 7)

3-6. CD Block (Page 8)

3-7. Optical Pick-up (KSS-213R) (Page 8)

5

ICF-CD843V

Note: Follow the disassembly procedure in the numerical order given.

3 two screws (B3)

3-2.

REAR CABINET ASSY
5 connector (CN901)

3 two screws (B3)

2 two screws (B2.6) 4 6 rear cabinet assy

1 two screws (B2.6)

3-3.

CD LID
3 boss 4 CD lid 3 boss

2 damper

6

1 screw (B3)

ICF-CD843V

3-4.

UPPER CABINET ASSY
2 two screws (B3) 1 screw (B2.6)

4 flexible flat cable (20core) (CN301)

5 upper cabinet assy

3 1 screw (B2.6)

3-5.

MAIN BOARD

3 MAIN board 1 flexible flat cable (14core) (CN302)

2 screw (B3)

2 four screws (B3)

7

ICF-CD843V

3-6.

CD BLOCK

3 vibration proof (green)

1 screw (B2.6) 2 4 CD block 3 vibration proof (green)

3 vibration proof (red)

1 three screws (B2.6)

3 vibration proof (red)

3-7.

OPTICAL PICK-UP (KSS-213R)
1 two claws 2 CD cover

3 gear (B) 8 optical pick-up (KSS-213R)

1 two claws

5 6 sled shaft 4 two screws (M2)

7 flexible flat cable (16core) (CNP701)

8

ICF-CD843V SECTION 4 ELECTRICAL ADJUSTMENTS
TUNER SECTION
[AM] Setting: Function : RADIO RADIO BAND button : AM
Put the lead-wire antenna close to the set. MAIN board CN303 pin 4 level meter 4.0 set 30% amplitude modulation by 400 Hz signal Output level: as low as possible + ­ MAIN board CN303 pin 3
L2 CT2 FM/TV (2 ­ 6 CH) TRACKING ADJUSTMENT Adjust for a maximum reading on level meter TV 2 ch 108 MHz TV (7 ­ 13 CH), WEATHER (1 ­ 7 CH) VCO VOLTAGE CONFIRMATION

0 dB=1 µV
L5 CT1

AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter 580 kHz 1,490 kHz

FM/TV (2 ­ 6 CH) VCO VOLTAGE CONFIRMATION Adjustment Part Frequency Display Reading on Digital Voltmeter Confirmation Confirmation 108 MHz TV 2 ch 15.0 ± 1.0 V 2.35 ± 0.1 V

AM RF signal generator

digital voltmeter MAIN board TP (VT) TP (FM GND) 100 k

Adjustment Part Frequency Display Reading on Digital Voltmeter Confirmation Confirmation TV 13 ch WEATHER 2 ch 10.0 ± 1.0 V 4.6 ± 0.5 V

[FM/TV] Setting: Function : RADIO RADIO BAND button: FM or TV or WEATHER
MAIN board CN303 pin 4 MAIN board FM RF signal TP (ANT) generator 0.01 µF set 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible MAIN board TP (FM GND) level meter 4.0 + ­ MAIN board CN303 pin 3

TV (7 ­ 13 CH), WEATHER (1 ­ 7 CH) TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L3 CT3 WEATHER 2 ch TV 13 ch

Adjustment Location: MAIN board (See page 10) FM STEREO ADJUSTMENT Setting: Function: RADIO RADIO BAND button: FM
FM RF SSG 0.01 µF MAIN board TP (ANT) set

digital voltmeter MAIN board TP (VT) TP (AM GND) 100 k

Carrier frequency : 87.5 MHz Modulation : no modulation Output level : 0.1 V (100 dB)

MAIN board TP (FM GND)

· Repeat the procedures in each adjustment several times, and the tracking adjustments should be finally done by the trimmer capacitors. · Remove FM antenna in FM adjustment.
AM IF ADJUSTMENT Adjust for a maximum reading on level meter RV2 1,000 kHz AM VCO VOLTAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter L1 Confirmation 530 kHz 1,710 kHz 2.3 ± 0.05 V 8.7 ± 1.0 V

1. Connect the frequency counter to TP (FMST) and TP (RADIO +B) as shown the figure below. 2. Tune the set to 87.5 MHz. 3. Adjust RV1 for 75.95 to 76.05 kHz reading on the frequency counter.
frequency counter

MAIN board
TP (FMST) TP (RADIO +B) TP (FM GND)

1 µF/50 V 33 k
+ + ­

Adjustment Location: MAIN board (See page 10)

9

ICF-CD843V

Adjustment Location: ­ MAIN BOARD (Component Side) ­

L5 AM Tracking Adjustment CT1

}

L1 AM VCO Voltage Adjustment RV1 FM Stereo Adjustment L3 TV (7 ­ 13 ch)/Weather (1 ­ 7 ch) CT3 Tracking Adjustment

}

RV2 AM IF Adjustment CT2 FM/TV (2 ­ 6 ch) Tracking Adjustment L2

}

­ MAIN BOARD (Conductor Side) ­

TP (FM GND) TP (ANT)

TP (AM GND)

TP (RADIO +B)

TP (VT)

10

ICF-CD843V

CD SECTION
CD section adjustments are done automatically in this set. In case of operation check, confirm that focus bias.

FOCUS BIAS CHECK
1. Connect the oscilloscope to TP (RF) and TP (GND) on the CD board. 2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01) 3. Press the u (CD) button. 4. Confirm that the oscilloscope waveform is as shown in the figure below. (eye pattern) A good eye pattern means that the diamond shape () in the center of the waveform can be clearly distinguished. · RF signal reference waveform (eye pattern)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.) TIME/DIV: 500 ns

0.8 ± 0.2 Vp-p

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.

Adjustment Location: ­ CD BOARD (Conductor Side) ­

IC701

TP (GND) TP (RF)

11

11

ICF-CD843V SECTION 5 DIAGRAMS
5-1. BLOCK DIAGRAM ­ CD Section ­
RF AMP, FOCUS/TRACKING SERVO, DIGITAL SIGNAL PROCESSOR, CLV SERVO, D/A CONVERTER IC701 LPF EFM IN ERROR CORRECTION AUDIO CD C1 ­ 2, C2 ­ 2 INTERPOLATION MUTE ATTENUATION DEEMPHASIS LCHO 42 RCHO 45 CD-L R-CH

RAM

A DETECTOR A D D

FIN2 8

· R-ch is omitted due to same as L-ch. · SIGNAL PATH : CD PLAY

+

FIN1 7

MIX

EQ

AGC

RF

4

3

SLISE LEVEL CONTROL

8FS DIGITAL FILTER

1 BIT DAC

LPF

A

(Page 13)

I-V AMP

C B PH A/D

B

C

AUDIO OUT

DOUT

39

BH F F TIN2 10 TIN1 9 TBAL LPF TRACK JUMP SW

CLV, CAV CONTROL RUPTURE DETECT

PLL VCEC

FRAME SYNC DETECT, PROTECT INSERT, EFM DECODE

FSEQ

31

41 FSEQ

E

E

SERVO PROCESSOR OPTICAL PICK-UP (KSS-213R) LASER DIODE AUTOMATIC POWER CONTROL Q701 AUDIO ADJUST S/H APC D/A GENERAL-PURPOSE PORTS SW

RAM

DRF

DRF

67

57 DRF

LD

LDD 80

COMMAND INTERFACE

CONT4

TDO FDO SLDO SPDO

XOUT

LDS

RES

XIN

FE TE

79 PD

13 15

20 21 23 22

25

72

49

48

66

61 62 63

S701 (LIMIT) FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED MOTOR DRIVE IC702 2-AXIS DEVICE T+ T­ TRACKING COIL DRIVE TIN 9

X701 33.8688MHz

DO WRQ

PD

LD

CONT1

SYSTEM CONTROLLER IC401 (1/2)

CE CL DI

64 65

50 WRQ 56 DATA-IN CD D306 D307 54 DATA CD/RADIO 55 CLK CD/RADIO 53 LAT CD/RADIO 58 XRST

T+

(TRACKING)

12 11

D308

(FOCUS)



D52

D53

F­ 1

18



19

CLK

39

CE

DI

S302 CD LID OPEN/CLOSE DETECT M702 (SLED)

M

26 27

SL+ SL­ SLED MOTOR DRIVE

SLIN

25

M701 (SPINDLE)

M

2 1

SP+ SP­ SPINDLE MOTOR DRIVE

OPEN
DI, CLK, CE

17

FOCUS COIL DRIVE

FIN

D54

F+

F+

SPIN

3

B

(Page 13)

MUTE

7

12

12

ICF-CD843V

5-2.

BLOCK DIAGRAM ­ MAIN Section ­
VT CT3, L3

TV(7 ­ 13ch) WEATHER(1 ­ 7ch) TRACKING ANT1 (FM/TV)

20 L3 TV RF CT3 D4 24

TVRO

TV/FM/AM RF AMP, MIX, OSC, DET, MPX IC1

CD-L

A

(Page 12)

TVIN

TV RF AMP 150kHz FM RF AMP

AMP Q101 DETO LOUT R-CH AMP Q102 BUFFER Q108

RV301 VOLUME

POWER AMP IC302 11 L IN 10 NF L MUTING Q106 R-CH 12 R IN 13 NF R L OUT 5 SP101 (L-CH) SP201 (R-CH)

BPF BPF1 CT2, L2 FM/TV(2-6ch) TRACKING L2 FM RF CT2 D3

25 22

FMIN FMRO

+

+

PSN

FM/TV LPF 45kHz

FM LMT

FM DET

35

36

MPXI

MPX DECODER

3

AM/FM: 1/2 TV: 1/8

AM BPF

AGC AMP

R OUT 3

VCO

BASS BOOST SWITCH Q103 R-CH

D303 R-CH

STANDBY 8

L5 AM FERRITE-ROD ANTENNA

26 CT1 D2 (1/2)

ARFI

AM RF AMP AM OSC AMLO TV/FM OSC FTLO REGULATOR BAND REGV IFCT VCO

S301 MEGA BASS ON OFF 3.3V

Q301

STANDBY SWITCH Q302, 303

CT1, L5 AM TRACKING D5

16

18

19

29

12

1

D2 (2/2) L1 AM OSC AM VCO VOLTAGE OSC BUFFER Q2

RV2 AM IF

RV1 FM STEREO 61 A MUT

MUTING Q405

51 BUZZERMUTE

52 BUZZER

60 POWER ON +3.9V REGULATOR Q955 +3.9V REGULATOR Q953 +6V REGULATOR Q952 MOTOR 6V B+ SWITCH Q305 B+ SWITCH Q1 +3.3V REGULATOR Q951 RECT D907 ­ 910 RECT D905, 906 RECT D901 ­ 903 VT 3.3V

BAND SELECT Q51

FM/AM PLL IC51 LOW-PASS FILTER Q52, 53 15 PD

11 AMIN

12 FMIN

5 BO1

6 BO2

PHASE DETECTOR CHARGE PUMP PSN 19 XIN X51 75kHz 20 XOUT 12BITS PROGRAMMABLE DIVIDER SWALLOW COUNTER 1/16, 1/17, 4BITS SYSTEM CONTROLLER IC401 (2/2) RESET 76 RESET SIGNAL GENERATOR IC402

LED 3.9V D402

3.9V

(Page 12)

B

DI, CLK, CE

DI CLK CE

DI 2 CLK 3 CE 1

CCB I/F

DATA SHIFT REGISTER LATCH CD ON 48

CD 3.3V

TU 3.3V RADIO ON 59 BACK LIGHT0

· R-ch is omitted due to same as L-ch. · SIGNAL PATH : CD PLAY : FM : TV : AM

BACK LIGHT1

CD LED RADIO LED BUZZER LED

X1

X2

74

75

70

71

SEG0 ­ SEG27 10 ­ 37

COM0 ­ COM3 6­9

KEY0 ­ KEY3 43 ­ 46

AC IN 49

78 ­ 80

T901 POWER TRANSFORMER (AC IN)

XT1

XT2

67

68

X402 4.19MHz

X401 32.768kHz LIQUID CRYSTAL DISPLAY LCD401 S601 ­ 621 D601 ­ 603 Q401, Q402 D604 ­ 609 (LCD BACK LIGHT) Q403, Q404 Q401 ­ 404 LED DRIVE

LED 3.9V

13

13

ICF-CD843V

5-3.

NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1/4 W or less unless otherwise specified. f · : internal component. · 5 : fusible resistor. · C : panel designation. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. A : B+ Line. B : B­ Line. H : adjustment for repair. Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. F : FM f : AM J : CD · · · ·

· Circuit Boards Location

Note on Printed Wiring Boards: · X : parts extracted from the component side. · Y : parts extracted from the conductor side. · W : indicates side identified with part number. f : internal component. · · : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: (Conductor Side) Parts face side: (Component Side)

Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

CD board PRESET board

LCD board

MAIN board

LED board

ALARM board

VOLUME board

TRANSFORMER board

14

14

ICF-CD843V

· Waveforms ­ CD Board ­
1 IC701 4 (RF) (CD PLAY mode)

­ MAIN Board ­
qa IC51 w; (XOUT) (RADIO ON mode)

­ LCD Board ­
wa IC401 u; (TX1)

0.85 ± 0.2 Vp-p

1.4 Vp-p

7.5 Vp-p

13.3 µs

30.4 µs

2 IC701 qd (FE) (CD PLAY mode)

ws IC401 uf (X1) (CD PLAY mode)

Approx. 90 mVp-p

2.6 Vp-p

239 ns

3 IC701 qg (TE) (CD PLAY mode)

Approx. 60 mVp-p

4 IC701 rk (XOUT)

2.9 Vp-p

29.5 ns

15

15

ICF-CD843V
5-4.
· Semiconductor Location
Ref. No. IC701 IC702 Q701 Location C-4 H-3 F-5
R715 R714 JW701 JW702 C727

PRINTED WIRING BOARD ­ CD Section ­

· See page 14 for Circuit Boards Location.

1 A

2

3 CD BOARD

4

5

6

7

8

C735

B
C754 JW730 JC704

JW703 C711 C716 C709 R723

JW705

FB701

IC701

C755

L706

C717 X701

JW707

C722 R716 R718

JW706

C
C708 C720 C721 C742

C732

C707

JW727

R717

JW729

D

A
MAIN BOARD CN302

CNP702

R719 C725 C724

C745 R722 C746 C744 C703 JW726 R708 R731 C747 JW724 R726 C730 R729 R730 C731
TP (GND)

C734 C736

JW709
C739 C738 R701 R706

(Page 18)

C743

R720 R721

TP (RF)

R704 C705

JW708

R703 R705

C723 JW728 C726 R724

R702 R709

E

JW725

R711 C704

R710 JW710 JW711 C706

R727

JW723

R725 C729 C728

R728 JW712

JW713 C702 C701 R707 R712 C751 JW714

C750

F
R743

M
M702 (SLED)

C733

Q701 JW722 C740

CNP701

G
JW720 JW719 R744

JW716 C741 JW718 JW721 S701 (LIMIT) M701 (SPINDLE)

JW715

OPTICAL PICK-UP BLOCK (KSS-213R)

M

H

R741

IC702

JW717

JC701
13

JC702

1-680-943-

(13)

16

16

ICF-CD843V
5-5. SCHEMATIC DIAGRAM ­ CD Section ­ · See page 15 for Waveforms. · See page 24 for IC Block Diagrams.

SW C729 1 R724 47k C747 100 10V

S701 (LIMIT)

GND

C730 0.1

C744 0.1 R728 10k

C728 0.047 R725 680 C746 100 10V

R731 2.2k

22p

22p

22p

0.01

22p

C720

C721

C722

C723

C724

1000p

1000p C726

C725

C727

680

1000p

R730 1k

R729 220

R726

R727 2.2k

A5

A2

A8

A4

A3

C745 0.1

A7

A6

CNP702 14P P-GND CD MOTOR 6.0V

A1 A2 C702 47 10V A3 C731 0.047 C704 22p R711 330 C705 4700p TP (RF) A4 A5 A6

R723 R722 R719 R720

100 FSEQ 100 DRF 100 DO 100 R717 R716 R718 R721 1k CL 1k CE 1k DI 1k RES CD R-OUT WRQ

R707 10

PCKIST

VVDD

PDO2

PDO1

VVSS

VDD5

FR

*WRQ

*RES

DO

DI

LDD

CONT1

CONT2

LDS

CONT3

Q701 KTN2907AS-RTK AUTOMATIC CNP701 16P VREF VCC E D A B C F GND LD VR PD F+ T+ T- F- C1 C2 C3 R712 100 C732 100 10V R701 R702 R703 R704 R705 R706 47k 15k 15k POWER CONTROL C701 1000p

R709 22k

R710 4.7k

R708 10k SLCO SLCIST EFMIN RF RFVDD

VSS

DRF

CL

CE

A7 A8 DATA A9

C703 0.1

(R-CH) (L-CH)

DATACK A10 LRSY ASDFIN ASDACK ASLRCK 16MOUT EFLG C2F RF AMP,FOCUS/TRACKING SERVO, DIGITAL SIGNAL PROCESSOR, XVSS FSX/16MIN XIN XOUT XVDD RVDD RCHO RVSS LVSS LCHO C716 0.01 R715 150 A10 R714 150 C711 0.01 FB701 A9 C717 0.01 JC704 220 X701 33.8688MHz C755 0.01 C754 0.01 L706

(Page 20)

CD L-OUT D-GND CD VDD 3.3V

TP (GND)

RFVSS FIN1 FIN2

15k TIN1 15k TIN2 47k (VC) VREF C734 C706 1 50V (FE) FE TEC (TE) TE C739 0.1 C707 1 C736 4700p JC703 0 RFMON JITTC ADAVDD C4 C733 100 10V C750 100 10V B1 TX C708 TY TDO 100p ADAVSS 4700p REFI

CLV SERVO,D/A CONVERTER IC701 LC78645NE-U

C738 0.1

SBCK/CONT6

(3.3V)VSS

SBCK/FG

GPDAC

CONT4

CONT5

DEFECT

MONI1

MONI3

MONI4

MONI5

MINI2

C751 0.1

LVDD

SPDO

DOUT

SLDO

FSEQ

C743 0.1

TEST

V/*P

VDD

FDO

C742 0.1

SPY

FY

SLY

C735 1000 6.3V C709 0.1

FX

SPX B3

B2

B4

SLX

B5

B4

A1

B2

C4 FIN

GND

SL-

SL+

VCC

VCC

(SLIN)

VREF

SLIN

(FIN)

C1 F+ F-

NC JC701 0 GND

FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED

(TIN)

IC702 BA5826FP-E2

SL+ M702 (SLED)

0

SL-

JC702

R743 6.8k

SP+ M701 (SPINDLE) SP-

R744 100k

R741 6.8k

C3

B3

B5

B1

C2

OPOUT

REG-B

MUTE

REGO

MOTOR DRIVE

SPIN

GND

SP+

RST

SP-

TIN

T+

T-

OPIN

C741 0.1

C740 470 10V

17

17

· Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : CD STOP [ ] : CD PLAY

The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

ICF-CD843V
5-6.
· Semiconductor Location
Ref. No. D2 D3 D4 D5 D52 D53 D54 D301 D303 D304 D305 D306 D307 D308 D951 D952 D953 D954 IC1 IC51 IC302 Q1 Q2 Q51 Q52 Q53 Q101 Q102 Q103 Q106 Q107 Q201 Q202 Q203 Q206 Q207 Q301 Q302 Q303 Q304 Q305 Q951 Q952 Q953 Q955 Location I-10 F-9 G-9 G-8 J-7 J-7 J-8 I-3 A-5 F-2 I-3 I-6 J-6 K-5 B-7 B-8 B-9 D-10 G-7 I-7 B-5 H-6 G-8 I-8 H-7 H-7 H-3 H-3 B-5 A-5 E-3 G-3 G-3 C-6 A-6 E-4 G-5 E-6 E-5 E-6 I-3 A-8 A-9 C-9 C-10

PRINTED WIRING BOARD ­ MAIN Section ­

· See page 14 for Circuit Boards Location.

1

2

3

4
MAIN BOARD
A

5
Q106
BCE K C117

6
Q206
BCE

7

8

9

10

11

12

A
R128

D303
C122 K C222

R228 R953 R951 R956

R120

+

+

C217

R129

C313 1

R331

R220

C123

Q951

R958

Q952

15 R954

B
C224 C124

IC302
JW309 C310 C115

R229 C223 JW308

R955

C957

R966

D951
JW310

D952
C953

D953
C965
C961

1
R960

+

+

+

C966

+
R127
C314

Q103 R138
ECB C121

C221

+

+

C954 C955

C958 C959

C962

+

C312

R238

C116

+ 4
KH951

R961 R962

E
TRANSFORMER BOARD CN901

R124

R125

R126

+
R313

+

C128

C951

R227

R312

R323

C309

+

+

EC B

JW307

JW306

C
R231 R131
C225 C125 C226 C126

R225

C215

C228 R226

+

C216 C952

+ +
C956 C960

Q953

R224

(Page 19)
C

JW305

JW316

JW315

JW314

JW313

JW312

JW311

JW304

JW303

Q203
R222

C963

R964

C964

+

+
C970

Q955
E

R311

R239

C308

R122

C129

C229

JW301

C967

D
JW358 JW357

JW339 JW340

R139

JW302 JW334 C968

+

D954

A

K

C969

B R965

ANT1 (TV/FM)

CN303 SP201 (R-CH) 1

JW360

Q303 Q302
BCE BCE RV2 (AM IF)

E

JW321

SP101 (L-CH)

C38

BPF1 3 1 TP (ANT)

R132 R232

4

JC6

JW342

C69

JW337

C13

R315

C41

C47

+

+

C36

+
C14 C10 C12 C11

R6

C316

C37

C8

CT2 C25

R309

+

F

+
JW381 JW361 C307 R308 C17

+
R12 C7 JW323 L2 FM/TV RF

+

R8

R7 C15 40 C1 1 21

D3
JW317
L3 TV RF

JW355

C5

R209

R303

R304

JW362

C328

+

JW343

+
R2 R1 10 11

JC5

C205

Q201 Q202

+

C101

C201

C29

R3

R5

C2

C46

C102 JW344 C202 TP (AM GND) TP (RADIO+B) C62

C28

R207

R210

R214

C206

C207

JW356

L7

C32

G
JW372 JW371

C302

Q301
BCE

L4

+

BCE

BCE

C43

D4
JW318 C77 JW319 R9

R19

JW363

C301

R110

R107

R114

C107

C106

1

R16

C30

+
JW364 JW365

C44

JW333

A L8 R4

K

JW345

BCE

R109

Q2
TP (VT)

R18

C33

+ C3

D5

R15

A

K

20

C27

RV1 (FM STEREO)

C16

IC1

C6

A

31

30

K

R13

CT3

R201

R211

L52

R66

R101

R63

R206

R113

R106

R213

JW338

R58

C57

H

R65

R64

C22

R20

R62

VOLUME BOARD CN304

JW326

R108 R112 7 R301 C104

R208 R212 C204 JW347 JW348 C73

Q53
C49

C76 C63 20 C64

JW325

+

C61 JW328 11 C55

R102

R202

+

+

+

R104

R204

C35

R21

X51

JW327

(Page 19)

C54

L1 AM OSC

R11 A A K

D301

L54

C51

C52

C66

JW349 JW350

IC51
1 10

C4

C20

C105

R61

C

C56

+

+

C103

C203

+

C324

Q1
BCE

Q52
S GD

C60

L53

Q102

Q101

C65

R57

ECB

ECB

JW346

+

C58 R59

JW324

C31

C78

R111

JW320 JC4

ECB

+

C48

D304

C119

C219

+

C9

JW322

TP (FM GND)

Q51
ECB

C19 C18

R10 C74 C75

C68

C70

I

D305
R318

JW366

D2

C320

C318

JW367 JW368

L5 AM FERRITE-ROD ANTTENA

R51

R52

R53

JW351 R324 R325 JW352 JW353 JW354

C53

R56

Q305

R55 R54

CT1

R319 R320 R321

D306 D307 D52 D53

JW330

R317

C325

D54
JW331 JW332

C71

JW370

J

C326

JW376

+

L301

JW375 JW374 C323 JW373

C322 1 13 CN302 2 C319 R326 R327 14

JW378

JW377

+
1 S302 CD LID OPEN/CLOSE DETECT 2 C321

JC3 JW379

1 CN301 2

19 20

D308

C72

JW329

+

K

12
1-684-038-

(12)

A
18

CD BOARD CNP702

(Page 16)

B

LCD BOARD CN401

(Page 22)

18

ICF-CD843V
5-7. PRINTED WIRING BOARDS ­ POWER Section ­ · See page 14 for Circuit Boards Location.

1

2

3

4

5

6

7

8

· Semiconductor Location
Ref. No. D901 D902 D903 D905 D906 D907 D908 D909 D910 D911 Q108 Q208 Location E-4 E-3 E-3 E-3 E-2 E-2 E-2 F-2 F-2 D-3 A-4 B-4

JW390

A
R137 R136

CN304

Q108

R135 R237 BCE

BCE

VOLUME BOARD

C127

1

-1 C227 R236 RV301 VOLUME -2

C
MAIN BOARD

B
ON

S301 MEGA BASS OFF R328 R322 C317

Q208

(Page 18)
7

R235

+

1-684-040-

12

C

(12)

TRANSFORMER BOARD
D911
R903 C902

D
CN901 1

C901 4

+
C904

+
R901

(Page 18)
C910

C903

JW902

C907

C908

E

MAIN BOARD KH951

D907

D908

D906 D905 +
C905

R904

E

R902

D902 D903

+

D909

D910

D901

F

C909

JW901

T901 POWER TRANSFORMER

G

TM901

BLK

WHT

TM902

12
1-684-042-

(12)

H
(AC IN)

19

19

ICF-CD843V
5-8. SCHEMATIC DIAGRAM ­ MAIN Section (1/2) ­ · See page 24 for IC Block Diagram.

(1/2)
A1 A2 A3 A4 R209 1k R301 1k D301 1SS119 R213 220k C203 4.7 50V R202 4.7k R204 3.3k R212 220k R208 470k C301 4.7 50V C206 1000p R207 470 R107 470 Q201 2SC4081 -T106 R206 470k R113 220k R106 470k C205 4.7 50V

Q201,202 AMP

A5 C204 47 10V R20 2.2k Q1 2SA1576A B+ SWITCH R21 47k R104 3.3k C73 0.01 C104 47 10V R112 220k C103 4.7 50V Q101 2SC4081 -T106 R109 1k R108 470k C302 220 10V C106 1000p Q101,102 AMP C107 1000p R110 470k R114 220k Q202 2SC4081 -T106 C207 1000p R210 470k R214 220k A6

(Page 21)

S302 CD LID OPEN/CLOSE DETECT

2

C49 47 10V

R102 4.7k

A7 1 R303 47 C328 220 10V Q102 2SC4081 -T106 A8 C105 4.7 50V

R304 47 R220 1k

Q206 2SD1757K MUTING C317 470 10V

Q301 DTA144EUA-T106 INVERTER

C217 1000p D303 DAP202U-T -106

R322 100

Q108,208 BUFFER

R135 100k

R235 100k

1000p

1000p

CN301 20P

C75

C74

R308 2.2k

C117 1000p Q106 2SD1757K R120 1k MUTING C119 4.7 50V 1 Q108 2SC4081 -T106 R136 1k CN304 7P R137 470 -1 C229 4700p R239 0 R222 10k C219 4.7 50V C127 1 R237 470 R236 1k C227 1 Q208 2SC4081 -T106

R309 100k

C307 4.7 50V

C129 4700p

R139 0

R122 10k

-2

RV301 20k/20k VOLUME

7

S301 MEGA BASS R328 2.2k

POWER GND

(Page 23)

C72 1000p

ON

OFF

PREGND2

PREGND1

FILTER

STBY

R OUT

L OUT

NF R

R IN

NF L

BS L

L IN

VCC

BS R

(NC)

POWER AMP IC302 BA5417

R311 1k

0

100

1SS119

1SS119

1SS119

C228 0.1

JC3

R226

R126

C308

CN302 14P

R331 10k

R125 4.7k Q103,203 BASS BOOST SWITCH

C128 0.1

R225 4.7k

C121 0.47 50V

C124 100 10V C125 1000 6.3V C313 1000p

C224 100 10V C225 1000 6.3V CN303 4P SP201 (R-CH) SP101

R327

D306

D307

D308

2200p

47k

47k

100

100

100

C122

C116 0.22

R138 6.8k Q203 2SC4081-T106

R324

R325

R326

4700p

10k

47k

C312 47 10V

Q103 2SC4081-T106

1000p

1000p

R312

R323

C309

C318 100p

C223

C123

C319 100p C320 100p

R224 10k

C215 4700p

C216 0.22

R238 6.8k

R313 1k

R124 10k

C115 4700p

R128

R228 220

220

R129 10k

C310

C222 47 10V R229 10k

100

47

R227 1k

C221 0.47 50V

10V

10V

R127 1k

(L-CH) C314 R231 2.2 C226 0.01 10 50V

(Page 17)
Q303 DTA144EUA-T106 C316 10 50V R315 0

R131 2.2 D304 1SS119

C126 0.01

R132 22k

R232 22k

C324 47 10V

C321 47 10V

Q302 DTC144EUA-T106 R317 470 JC6 0

Q302,303 STANDBY SWITCH

R319

R320

R321

R318 47k

D305 1SS119

C323 0.01

C322 0.01

4.7k

4.7k

4.7k

D901-903,905-910 RECT D901 R956 1 Q953 KTC3203Y Q952 2SD2396K +6V REGULATOR Q951 2SD2396K +3.3V REGULATOR R951 1 R901 10k C904 47 35V D902 1SS119 D903 1SS119 D905 R902 220k D906 1SS119 1SS119 T901 POWER C907 D907 D908 C908 C909 C962 220 10V C961 0.01 D953 MTZJ-T-77 -4.3B C958 220 10V C957 0.01 D952 MTZJ-T-77 -6.8B C954 220 10V C953 0.01 D951 MTZJ-T-77-3.9A C965 1000p C966 1000p D909 D910 C910 0.1 1N4002B 1N4002B 0.1 0.1 1N4002B 1N4002B 0.1 TM902 TRANSFORMER TM901 (AC IN) C903 1SS119 47 35V

L301 1µH

0.01

6800 C952

B+ SWITCH Q955 2SD596 +3.9V REGULATOR C964 220 10V C963 0.01 R960 100 C960 470 10V C959 0.01 R958 220 C956 470 10V C955 0.01 R954 1k R953 470

C951

R962

1k

Q305 2SB1013

+3.9V REGULATOR

16V

D911 MTZJ-T-77-22B

C901 47 35V

R961 1k

KH951 4P

CN901 4P

4.7k

R965 100 C325 220 10V C970 220 10V C969 0.01 D954 UDZS-TE17 -4.3B C968 220 10V

R964 100 C967 0.01

C326 2.2 50V

R966 220

R955 470

· Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : FM [ ] : CD PLAY

R904

C905 47 35V

C902 0.47

R903 100k

The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

20

20

ICF-CD843V
5-9. SCHEMATIC DIAGRAM ­ MAIN Section (2/2) ­ · See page 15 for Waveform. · See page 24 for IC Block Diagrams.

(2/2)

TP (VT) R10 10k R12 100k R13 100k C46 220p R15 100k

C30 2p D2 KV1610ST1-2 C20 4700p

Q2 2SC3931 -C-TX OSC BUFFER

D3 HVU363ATRU

D4 HVU363ATRU

L5 AM ANT1 (TV/FM) FERRITE-ROD ANTENNA CT1 10p TP (ANT) BPF1 C18 10p C19 0.047 R11 1M C22 7p L1 AM OSC L2 FM/TV RF CT2 10p

C25 1000p

L3 TV RF

CT3 10p

C27 1000p

L4 33nH

C28 4p

C29 1000p

D5 HVU363ATRU

R16 22k

C43 0 C36 22p C32 1000p C31 1000p TP (FM GND) C77 100p C78 0.01 C41 100p C47 1000p C48 0.01

L7 1µH

R19 100

R18 330

C33 0.01

JC4

R6 1k

R9 0 R51 R52 R53 1k 1k 1k C51 C52 C53 100p 100p 47p

C70 0.01

C69 1000p

C68 100p

RV2 100k

C6 1

C7 0.01

C37 1000p

C8 10 50V

C5 0.01

C38 100p

C9 4.7 50V D53 1SS119 A1 D52 1SS119 A2 D54 1SS119 A3 R63 100 C10 0.1 MPRM C11 C12 FM/AM PLL 0.1 V12M 1 MUTE C13 C14 22 470p DETO R7 470 Q51 DTA144EUA -T106 BAND C54 1000p X51 75KHz SELECT PLL2 TUNE C17 4.7 50V C16 0.47 C15 1 TV/FM/AM RF AMP, MPXI PLT2 PLT1 PLL1 MIX,OSC,DET,MPX IC1 CXA1960Q FALC PLLO COMP BAND AMLO 25V AAGC FMBF FTLO REGV TVRO R56 2.2k R55 2.2k R54 2.2k JC5 0

MREF

FMRO GND

ARFI

DQ

BO3

BO2

IFIN

GND(D)

BO1

102

101

GND(A)

CL

CE

DI

AOUT

VDD

XIN

XOUT

AMIN

FMIN

PD

AIN

IC51 LC72122V

R8 2.2k

0.01

MPRG

DDCN

PLLI

STID

MCNT

LOUT

ROUT

VCC

TP (RADIO +B) A4

R57 10

C55 100p

L53 100µH

C61

C60 22 25V

L52 1µH

C63 12p

R58 10k

C64 12p

C58 470p

VCC

OLAG

FMIB

IFCT

FMIN

TVIN

NC

GND

TP (FM ST)

R5 1k

R59 10k

C56 0.33 R4 22 RV1 4.7k R1 4.7k

(Page 20)
470k 470k 1000p 220k 220k
Q52 2SK209GR S Q52,53 LOW-PASS FILTER R65 10k

L8 1µH

R201

R101

C44

R211

R111

C202 1

R2 2.2k

C101

C201

C57 220p

C76 1 C1 10 50V

0.022

0.022

C66 0.01

R64

R66 4.7k

Q53 2SC4081 -T106

L54

1µH

C4 0.01

C35 0.01

C102 1

10

R3 10k

TP (AM GND)

C2 0.01

C3 100 10V

C71 1000p R62 10k

C65 0.01

C62 100 25V

R61 100k

A5 A6 A7 A8

· Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : FM/TV (2 ­ 6 CH) ( ) : AM : TV (7 ­ 13 CH)/WEATHER (1 ­ 7 CH)

21

21

ICF-CD843V

5-10. PRINTED WIRING BOARDS ­ PANEL Section ­
· Semiconductor Location
Ref. No. D401 D402 D403 D601 D602 D603 D604 D605 D606 D607 D608 D609 IC401 IC402 Q401 Q402 Q403 Q404 Q405 Location B-4 F-10 E-10 D-12 C-12 B-12 F-12 G-12 H-12 H-12 I-12 J-12 E-7 C-8 D-10 H-10 C-10 G-10 G-8

· See page 14 for Circuit Boards Location.

1

2
PRESET BOARD

3

4
S601 BRIGHTNESS

5
LCD BOARD
S602 NAP S603 CD PLAY MODE

6

7

8

9

10

11

12
ALARM BOARD
S616

13

14

A
S610 5 R619 R620 BP601

S604 CLOCK R604

TUNE/TIME SET -

R602 R601

R603

R606 R636 R608 R607 R610 S605 D. S. T. SUMMER T. R643 S621 S619 ALARM SET CD

2 BP604 CN402 1

B
S615 SNOOZE DATE/SLEEP OFF C601 S615 S611 4

BP603

D603
CD

JC401

R621 R622 32

IC402
3 1 R495 C438

D602
C439 JW421 JW422 RADIO

ALARM SET RADIO

JW402

JW403

JW401

C

R630 PRESET TUNING SELECT/PRESET S612 3 C403 R624

+

C437

BCE

S620 R642 CN401 20 19 ALARM MODE

R638 R637 R640

R409

C402

Q403
C455 C433

R408 R402 R401 C401 C457 C456

BCE

+
X402 JW406

Q401

7

C430

2

C429

R412 R414

L402

D

1

R623

R405 R403 R410 R411 R413 R415 R416 1 80

C436

R485

R406 R404

C435 C434 C431 C432

JW407 JW408 R641

D601
BUZZER

S617 ALARM SET BUZZER

R480

R479

R478

JW418

S613 2

R418 R420 R422

R417 R419 R421

X401

C427

B
MAIN BOARD CN301

R634 R633

R632

1

(Page 18)
20

JW409

E
S614 1

R427 R429 R431 R433

21

60

R473 R472 R471 C418 C417

C420

R626

LCD401 LIQUID CRYSTAL DISPLAY

R423 R424 R425 R426 R428

IC401

61

R475 R474 C424 C422

R476

R631 BP605 S618 TUNE/TIME SET +

12
1-684-036-

2 1

(12)

JW411

JW410

JW419

R430 R432 R434

D403
7

C453

LED BOARD
D604

R627

12 (12)

R435 R436 R437 R439 R440 R441 R438 R443 C449

40

41

R470 C416 R469 R468 C415 C414 R467

F

R628

1-684-037-

D402
C441

R644

C444 R453

C410

C446 R456 R455 R460 R459 R451 C407

R444 R452

L401

R466 C411

1

JW420

ECB

C406

R446 R445

R464

R490 C448 2 1

R489

Q405 +
C405

D605

R448

R461

R462

C408

R454

R457

R491

R492

R493

G
1

R442

R449

R463 C409

Q404

ECB

R450

C452

R646

JW416

JW415

JW414

JW413

JW412

JW417

R458

R487

R494

R488

C447

ECB

Q402

12 (12)

D606

1-684-034-

H
BP602 R616 R612 R611 R614 R613 ALARM RESET R618 R617 S609 OFF

R648 R650 R652

D604 - 609 (LCD BACK LIGHT)

I

S606 SLEEP

S607 CD

S608 RADIO BAND

D608

D609

R653 R655 R654

I

R651

D607

R649

R647

R645

C404

R447

C443

C445

C413

L403
C442

1-684-0351 2

12 (12)

22

22

ICF-CD843V
5-11. SCHEMATIC DIAGRAM ­ PANEL Section ­ · See page 15 for Waveforms. · See page 26 for IC Pin Function Description.

D601 TOL-31CSGAKAA -KS01 BUZZER D602 TOL-31CSGAKAA -KS01 RADIO D603 TOL-31CSGAKAA -KS01 CD R632 S616 TUNE/ TIME SET -
AA17 AA16 AA15 AA14 AA13 AA12 AA11 AA25 AA10 AA18 AA19 AA20 AA21 AA22 AA23 AA24 AA26 AA27 AA28 AA29 AA30 AA31 AA32

R641 220

LCD401 LIQUID CRYSTAL DISPLAY

S617 ALARM SET BUZZER

S618 TUNE/TIME SET +

S619 ALARM SET CD

S620 ALARM MODE

S621 ALARM SET RADIO

R642 220

SEG12

SEG11

SEG16

SEG26

SEG23

SEG19

SEG27

SEG24

SEG25

SEG22

SEG21

SEG20

SEG18

SEG17

SEG15

SEG14

SEG13

SEG10

COM3

SEG8

SEG9

SEG5

SEG4

SEG3

SEG2

SEG1

COM1

SEG7

SEG6

COM0

COM2

SEG0

R631

220k 100k

R633 R634

100k 47k R636 22k

R637 R638

47k 22k R640 10k

R643 220

BP605

S617

S618

S619

S620

S621

D604-609 (LCD BACK LIGHT) R644 1 7 D604 TOL-30BUGBKAA -K51-U5S 1 7 D605 TOL-30BUGBKAA -K51-U5S R645 100 470

AA4

AA5

AA7

AA8

AA1

AA2

AA3

AA6

AA9

R646 R647

470 100

AA31

AA22

AA18

AA19

AA20

AA21

AA23

AA24

AA25

AA26

AA27

AA28

AA29

AA30

AA32

C403 0.1

R405 47k

C402 0.1

R403 47k

C401 0.1

R401 22k

R402 47k

R406 22k

R404 22k R408 22k JC401 0

R648 D606 TOL-30BUGBKAA -K51-U5S R649

470 100

1k

1k R411

1k

1k

1k

1k

1k

1k

1k

1k

1k

1k

1k

1k

R414

R415

R420

R424

R423

R422

R421

R419

R418

R417

R416

R413

R412

R410

1k

R650 D607 TOL-30BUGBKAA -K51-U5S R651

470 100

R409 10k

R652 D608 TOL-30BUGBKAA -K51-U5S
0.22 0.22 0.22

470 100

R653

SEG10

SEG9

VLC0

VLC1

SEG8

VLC2

SEG7

SEG6

SEG5

SEG4

COM2

COM3

COM0

SEG3

COM1

SEG2

SEG1

SEG0

NC

NC

R654 D609 TOL-30BUGBKAA -K51-U5S R655

470 100

C456

AA17 AA16 AA15 AA14 AA13 AA12 AA11 AA10 AA9 AA8 R619 470k R621 220k R623 100k R627 47k AA7 AA6 R620 220k R622 100k R624 47k R626 22k R628 22k R630 10k CN402 2P AA5 AA4 AA3
BP604

R425 R426 R427 R428 R429 R430 R431 R432 R433 R434 R435 R436 R437 R438 R439 R440 R441 L401

1k SEG11 1k SEG12 1k SEG13 1k SEG14 1k SEG15 1k SEG16 1k SEG17 1k SEG18 1k SEG19 1k SEG20 1k SEG21 1k SEG22 1k SEG23 1k SEG24 1k SEG25 NC R479 SEG26 NC R478 SEG27 AVDD NC HP ON R475 CD OPEN VERSION
DATA CD/RADIO CLK CD/RADIO LAT CD/RADIO BUZZERMUTE DATA-IN CD POWER ON

BUZZER LED RADIO LED CD LED NAP LED C436 RESET X402 X2 X1 VSS0 C431 VDD0
100 220

C457

0.01 C435 47p C434 47p R485 10k

C455

1

2

4.19MHz

C433 100 10V

1

2

0.1
470 R494

X401 TX2 SYSTEM CONTROLLER IC401 µPD789477GC- A19-8BT TX1 IC BACK LIGHT 1 BACK LIGHT 0 R480 1k 1k 1k

32.768KHz

C432 2.2 C430 22p

L402

1

Q403 DTA144EUA -T106

S610

S611

S612

S613

S614

C601 0.01

2 S615
BP603

AA2 AA1

1k 1k

R489 2.2k C448 1 1k 1k BB15 BB14 R476 47k D403 1SS119 Q401 DTA144EUA -T106 Q401-404 LED DRIVE R490 100k Q404 2SC4081 -T106

5

4

3

2

1

SNOOZE DATE/SLEEP OFF

HP SW R474 A MUT C427 10K C424 0.01

PRESET TUNING,SELECT/PRESET

BUZZER

CD ON

AC IN

AVSS

KEY3

WRQ

10V

10k

10k

2.2

0.01

100

DRF

RADIO ON

KEY1

FSEQ

NC

KEY2

XRST

KEY0

C405

R443

R444

C449

C404

R487 2.2k C447 1 R488 100k Q402 2SD596

1k

1k

R451 100 R601 220k R602 100k R603 100k R604 47k R606 22k R607 47k R608 22k R610 10k R448 100

R447 1k

R462

R463

R464

10k

R454 100

R495 470k CN401 20P D402 1SS119 L403 0

RESET SIGNAL GENERATOR BP601 S601 S602 S603 S604 S605 R457 100
2200p 220k 100k 0.01 0.01 220k 100k 220k 100k 220k 100k 100k 100p 220k 47 47 47 10k 1k 1k 1k

R458 10k

RST G IC402 PST600L-T

V

R491

R492

R493

C429 22p

1k

BB15 BB14 BB13 BB12 BB11

BRIGHTNESS

NAP

CD PLAY MODE

CLOCK

D.S.T SUMMER T.

0

R459

R455

R456

R460

R445

R446

R449

R450

R452

R453

R461

C443

C444

C410

C411

R467

R468

R470

R472

0

R466

R469

R471

R473

BB7

BB4

BB1

BB2

BB3

BB5

BB6

BB8

BB9

BB10

BB11

BB12

BB13

R611 220k

R613 100k

R617 47k

C445 0.01

C446 0.01

C437 0.01

C438 0.1

C439 470 4V

C441 0.1

C442 0.1

BB10 BB9 BB8

R612 100k BP602 S606

R614 47k S607

R616 22k S608

R618 22k S609

C406 100p

C407 0.01

BB7 BB6
100p 100p 100p 100p 100p 0.01 0.01 0.01 1000p

C452 1 SLEEP CD RADIO BAND ALARM RESET R442 220k OFF Q405 2SC4081-T106 MUTING

47p

BB5 BB3

C415

C413

C414

C417

C408

C409

C416

C420

C422

C418

BB2 BB1 BB4

(Page 20)

C453 1

23

23

· Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : FM [ ] : CD PLAY

ICF-CD843V
· IC Block Diagrams ­ CD Board ­ IC701 LC78645NE-U
FR VVDD PCKIST VVSS PDO2 PDO1 CONT1 CONT2 CONT3

IC702
*WRQ
VSS VDD5

BA5826FP-E2

*RES

LDD

LDS

DRF

DO

CL

CE

SP­ 1 D.BUFF SP+ 2

80 APC

79

78 77 76 75 74 73 PLL VCEC

72 71 70

69 68

67

66

65 64 63 62 61

DI

28 GND 27 SL­ D.BUFF LEVEL SHIFT LEVEL SHIFT D.BUFF 26 SL+ D.BUFF

DRF CLV, CAV CONTROL SLCO 1 SLCIST 2 EFMIN 3 RF 4 RFVDD 5 RFVSS 6 + ­ + ­ + ­ SLICE LEVEL CONTROL RUPTURE DEFECT

COMMAND INTERFACE

SPIN 3 RST 4

25 SLIN THERMAL SHUT-DOWN MONITOR
REGULATOR

24 (SLIN) 23 VREF VCC VCC 22 VCC 21 VCC 20 (FIN)

LEVEL SET

PH

+ ­ + ­ VREF SERVO PROCESSOR + ­ RAM INTERPOLATION MUTE ATTENUATION DEEMPHASIS SERIAL OUT 60 DATA 59 DATACK 58 LRSY 57 ASDFIN 56 ASDACK 55 ASLRCK

REG­B 5 REGO 6 MUTE 7 GND 8 TIN 9 (TIN) 10
RAM

FIN1 7

MIX

EQ LPF

AGC

BH

FIN2 8 TIN1 9

­

+

+

+ TBAL

+
­

LPF LPF

SW

EXTERNAL AUDIO IN

DRIVER MUTE 19 FIN LEVEL SHIFT LEVEL SHIFT

VREF 11 ERROR CORRECTION AUDIO CD C1-2, C2-2 + ­

REF1 12 FE TEC TE RFMON 13 14 15 16

JITTC 17

ADAVDD 18 ADAVSS 19

TDO 20

CONT4

CONT5

SBCK/CONT6

DEFECT V/*P

MONI1

MONI2

MONI3

MONI4

MONI5

FDO SPDO SLDO GPDAC

SBCK/FG

FSEQ

BOUT

TEST

VSS VDD

+ ­ A/D

TIN2 10

TBAL

AUTO ADJUST

D.BUFF
54 16MOUT 53 EFLG 52 C2F 51 XVSS 50 FSX/16MIN

D.BUFF 18 F­ D.BUFF 17 F+ 16 NC 15 OPIN

T­ 11 D.BUFF T+ 12 GND 13 OPOUT 14

VREF

MONITOR CONTROL

TRACK JUMP CLOCK GENERATOR FRAME SYNC DETECT, PROTECT INSERT, EFM DECODE

JITTER DETECT

49 XIN 48 XOUT 47 XVDD

8FS DIGITAL FILTER 1BIT DAC

SUBCODE DECODE CRC S/H D/A SW MONITOR SIGNAL SELECTOR

LPF AUDIO OUT

GENERAL-PURPOSE PORTS 21 22 23 24 25 26 27 28 29 30

46 45 44 43 42 41

RVDD RCHO RVSS LVSS LCHO LVDD

31 32

33

34

35

36 37 38 39 40

24

24

ICF-CD843V
­ MAIN Board ­ IC1 CXA1960Q
MREF GRND FMRO FMIB FMIN IFCT NC TVIN ARFI OLAG

30

29

28 27

26

25

24 23 22 21

MPRM 31

AM RF AMP

FM RF AMP

TV RF AMP OL DET 1.25V FM/TV OSC

20 TVRO 19 REGV

V12M 32

MUTE 33 MUTE FM DET AM AGC AAGC 34

FM LMT 150kHz FM/TV LPF PSN + ­ AM BPF 45kHz TUNE MPX DECODER 38kHz STEREO AUDIO L STID + ­ STEREO AUDIO R AM OSC AM/FM: 1/2 TV: 1/8 1.25V 1/X + ­ 1/2 1.65V 1 VCO 2 MPRG 3 4 5 ROUT DDCN LOUT 6 7 8 9 PLLI STID MCNT GRND 10 VCC
REFERENCE DIVIDER PHASE DETECTOR CHARGE PUMP POWER ON RESET 1/2

18 FTLO 17 FMBF

DETO 35

16 AMLO 15 FALC 14 PLLO 13 COMP

AGC AMP

MPXI 36

PLT2 37 PLT1 38 PLL1 39 PLL2 40 PD VCO 19kHz 1/2 14V

1.25V

12 BAND

11 TUNE PLAP

IC51

LC72122V-TLM

IC302

BA5417

CE DI CL DO

1 2 3 4

CCB I/F 20 XOUT 19 XIN 18 VSSA 17 AOUT 16 AIN 15 PD 14 VSS BS 1 2 3 4 5

T.S.D. + ­ + ­

STANDBY BS 6 7 8 FILTER 9 10 11 12 13 14 15

B01 B02 B03 I01 I02

5 6 7 8 9

DATA SHIFT REGISTER LATCH

12BITS PROGRAMMABLE DIVIDER

NC

OUT2 VCC OUT1

BS1

NF1

IN1

IN2

BS2

STBY

POWER GND

FILTER

NF2

UNLOCK DETECTOR 13 VDD

UNIVERSAL COUNTER

SWALLOW COUNTER 1/16,1/17 4BITS

12 FMIN

11 AMIN

IFIN 10

PRE GND1 PRE GND2

25

ICF-CD843V

· IC Pin Function Description

LCD BOARD IC401 µPD789477GC-A19-8BT (SYSTEM CONTROLLER) Pin No. 1, 2 3 to 5 6 to 9 10 to 37 38 39 40 41 42 43 to 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 to 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Pin Name NC VLC0 to VLC2 COM0 to COM3 SEG0 to SEG27 AVDD CD OPEN VERSION FSEQ NC KEY1 to KEY4 AVSS CD ON AC IN WRQ BUZZERMUTE BUZZER LAT CD/RADIO
DATA CD/RADIO CLK CD/RADIO

I/O -- -- O O -- I I I -- I -- O I I O O O O O I I O O O O I O -- O O -- I O -- -- I O I O O O O Not used

Description
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage

Common drive signal output to the liquid crystal display Segment drive signal output to the liquid crystal display Power supply terminal (+3.3V) (analog system)
CD lid open/close detection signal input terminal "L": CD lid is closed, "H": CD lid is opened

Destination setting terminal Synchronizing signal detection signal input from the digital signal processor Not used Key input terminal (A/D input) Ground terminal (analog system) Power on/off control signal output for the CD +3.3V power supply Power failure detection signal input terminal Interruption detection signal input from the digital signal processor Buzzer sound muting on/off control signal output Buzzer sound drive signal output Chip enable signal output to the digital signal processor and FM/AM PLL Serial data output to the digital signal processor and FM/AM PLL Serial data transfer clock signal output to the digital signal processor and FM/AM PLL Serial data input from the digital signal processor Focus on/off detection signal input from the digital signal processor Reset signal output to the digital signal processor Power amplifier on/off control signal output Audio line muting on/off control signal output "L": reset "L": radio power on Power on/off control signal output for the radio +3.3V power supply "L": muting on "H": muting on "L": CD power on "L": power failure, "H": power on

DATA-IN CD DRF XRST RADIO ON POWER ON A MUT HP SW HP ON NC BACK LIGHT 0 BACK LIGHT 1 IC TX1 TX2 VDD0 VSS0 X1 X2 RESET NAP LED CD LED RADIO LED BUZZER LED

"L": standby mode, "H": power amplifier on

Connection detection signal input teminal of the headphone jack "L": headphone connected, "H": no headphone Not used Headphone on/off control signal output terminal Not used LED drive signal output of the liquid crystal display back light LED drive signal output of the liquid crystal display back light Internal connection terminal Sub system clock input terminal (32.768 kHz) Sub system clock output terminal (32.768 kHz) Power supply terminal (+3.3V) Ground terminal Main system clock input terminal (4.19 MHz) Main system clock output terminal (4.19 MHz) System reset signal input "L": reset For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H" LED drive signal output terminal of the NAP LED drive signal output terminal of the CD "L": LED on "L": LED on "L": LED on "L": LED on Not used "L": all LEDs on "L": half LEDs on "L": headphone on Not used

LED drive signal output terminal of the RADIO LED drive signal output terminal of the BUZZER

26

ICF-CD843V SECTION 6 EXPLODED VIEWS
NOTE: · -XX and -X mean standardized parts, so they may have some difference from the original one. · Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts Color Cabinet's Color · Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. · Accessories are given in the last of the electrical parts list. · Refer to "SERVICING NOTES" (page 3) for original type and LIV type. The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

6-1. CABINET SECTION

upper cabinet section

8 7

5

9

3

4 2

7

7 9

6

7

rear cabinet section

1

front cabinet section

7

Ref. No. 1 * 2 3 4 5

Part No. 3-368-852-01 1-684-037-12 3-238-159-21 3-831-441-11 X-3384-685-1

Description FOOT PRESET BOARD BUTTON (SNOOZE) CUSHION (B) COVER ASSY

Remark

Ref. No. 6 7 8 9

Part No. 3-254-142-01 3-253-143-01 3-254-143-11 3-254-145-01

Description SCREW (B3), (+) BV TAPPING SCREW (B2.6), (+) P TAPPING SCREW (B3), (+) BV TAPPING SCREW (B3), (+) BV TAPPING

Remark

27

ICF-CD843V

6-2. UPPER CABINET SECTION
67

Optical pick-up section (KSM-213RDP)
B

56

56 55

58

57 57

58

58

66 54
L5 #1

68

53 70
S302

62

60

71
ANT1

61
A

MAIN board

A B

69 51 52 69 69

64 63

59 65 69

65
Remark Ref. No. 64 65 * 66 67 68 69 70 71 ANT1 L5 S302 #1

not supplied
Part No. 3-243-253-01 3-243-252-01 A-3347-089-A 3-923-736-01 1-757-689-11 3-254-143-01 3-253-143-01 3-243-249-01 1-501-907-61 1-428-938-11 Description CUSHION (A) CUSHION (SP) CD BOARD, COMPLETE COVER, CD CABLE, FLEXIBLE FLAT (16 CORE) SCREW (B3), (+) BV TAPPING SCREW (B2.6), (+) P TAPPING SHEET (MAIN) ANTENNA, FM WIRE COIL, FERRITE-ROD ANTENNA (MW) Remark

Ref. No. 51 52 53 54 55 56 57 58 59 60 61 62 63

Part No. 3-922-112-31 3-238-155-31 3-019-395-01 1-452-899-11 3-238-156-21 3-046-853-11 3-046-853-01 3-252-828-01 A-4542-998-A 3-238-166-01

Description DAMPER CABINET (UPPER) PLATE, CHUCKING MAGNET LID, CD RUBBER, VIBRATION PROOF (GREEN) RUBBER, VIBRATION PROOF (RED) SCREW (B2.6), (+) PWH TAPPING MAIN BOARD, COMPLETE HOLDER (ANTENNA)

1-824-018-11 CABLE, FLEXIBLE FLAT (14 CORE) 3-238-173-01 SPRING (CD) 3-243-255-01 CUSHION (C)

1-692-960-11 SWITCH, PUSH (1 KEY) (CD LID OPEN/CLOSE DETECT) 7-685-853-04 SCREW +BVTT 2X6 (S)

28

ICF-CD843V

6-3. FRONT CABINET SECTION

SP101

113 113

SP201

114

109

103 103 110

101
LCD401

107 103

102 103

104
LCD board

108

110 105

106

Ref. No. 101 102 103 104 * 105 * 106 107

Part No.

Description

Remark

Ref. No. 108 109 110 113 114

Part No. 1-823-761-11 3-238-758-01 3-254-143-01 3-238-174-01 X-3384-684-1

Description CABLE, FLEXIBLE FLAT (20 CORE) SHEET (+/-) SCREW (B3), (+) BV TAPPING SPRING (SP) CABINET (FRONT) ASSY

Remark

A-4547-002-A LCD BOARD, COMPLETE (including ALARM board, LED board) 3-238-169-01 CASE (LCD) 3-831-441-11 CUSHION (B) 3-243-251-01 CUSHION (LIGHT GUIDE PLATE) 1-684-036-12 ALARM BOARD 1-684-035-12 LED BOARD 3-238-164-01 HOLDER (LCD)

LCD401 1-804-647-11 DISPLAY PANEL, LIQUID CRYSTAL SP101 1-529-976-11 SPEAKER (6.6cm) (L) SP201 1-529-976-11 SPEAKER (6.6cm) (R)

29

ICF-CD843V

6-4. REAR CABINET SECTION

160 160

155

153 159

159

161 156

159 159

not supplied

157

152
T901

158

151

159

The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

Ref. No. 151 * 152 153 155 * 156 157

Part No. 3-238-170-01 1-684-042-12 3-238-165-01 3-238-154-31 1-684-040-12

Description BRACKET (TRANSFORMER) TRANSFORMER BOARD HOLDER (TRANSFORMER) CABINET (REAR) VOLUME BOARD

Remark

Ref. No. 0 158 159 160 161 0 T901

Part No. 1-757-636-11 3-254-143-01 3-831-441-99 3-243-631-01 1-435-578-41

Description CORD, POWER SCREW (B3), (+) BV TAPPING CUSHION, STOPPER CUSHION (D) TRANSFORMER, POWER

Remark

3-227-332-31 KNOB (VOL)

30

ICF-CD843V

6-5. OPTICAL PICK-UP SECTION (KSM-213RDP)

553

552

555

559

551

not supplied

556 554

557

558

M702

The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. 551 * 552 * 553 554 0 555 Part No. Description Remark Ref. No. 556 557 * 558 * 559 M702 Part No. 2-626-908-01 2-174-500-01 2-169-385-01 2-169-384-01 X-2162-712-2 Description SHAFT, SLED SCREW (M2X3) SPRING, SLED SHAFT (S), GEAR GEAR ASSY (R) (RP), MOTOR (SLED) Remark

X-2162-707-2 CHASSIS ASSY (RDP) (RP), MOTOR (including M701) (SPINDLE) 2-647-408-02 GEAR (B) 2-169-065-01 GEAR (A) 2-169-388-01 TAPPING (M2), +PWB 8-820-161-02 OPTICAL PICK-UP (KSS-213R/C2RP)

31

ICF-CD843V ALARM CD SECTION 7 ELECTRICAL PARTS LIST
· Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. · SEMICONDUCTORS In each case, u: µ, for example: uA. . : µA. . uPA. . : µPA. . uPB. . : µPB. . uPC. . : µPC. . uPD. . : µPD. . · CAPACITORS uF: µF · COILS uH: µH The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. When indicating parts by reference number, please include the board.

NOTE: · Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. · -XX and -X mean standardized parts, so they may have some difference from the original one. · RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable

Ref. No. *

Part No.

Description

Remark

Ref. No. C716 C717 C720 C721 C722 C723 C724 C725 C726 C727 C728 C729 C730 C731 C732 C733 C734 C735 C736 C738 C739 C740 C741 C742 C743 C744 C745 C746 C747 C750 C751 C754 C755

Part No. 1-162-974-11 1-163-021-11 1-162-919-11 1-162-919-11 1-162-919-11 1-162-974-11 1-162-919-11 1-162-964-11 1-162-964-11 1-162-964-11 1-165-176-11 1-125-837-11 1-107-826-11 1-165-176-11 1-104-658-91 1-104-658-91 1-162-968-11 1-126-916-11 1-162-968-11 1-164-156-11

Description CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT ELECT CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP 0.01uF 0.01uF 22PF 22PF 22PF 0.01uF 22PF 0.001uF 0.001uF 0.001uF 0.047uF 1uF 0.1uF 0.047uF 100uF 100uF 0.0047uF 1000uF 0.0047uF 0.1uF 0.1uF 470uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 100uF 100uF 100uF 0.1uF 0.01uF 0.01uF 10% 5% 5% 5%

Remark 50V 50V 50V 50V 50V 50V 50V 50V 50V 50V 16V 6.3V 16V 16V 10V 10V 50V 6.3V 50V 25V 25V 10V 25V 25V 25V 25V 25V 10V 10V 10V 25V 25V 25V

1-684-036-12 ALARM BOARD (Included in LCD board) ************ < DIODE > D601 D602 D603 6-500-040-01 LED TOL-31CSGAKAA-KS01 (BUZZER) 6-500-040-01 LED TOL-31CSGAKAA-KS01 (RADIO) 6-500-040-01 LED TOL-31CSGAKAA-KS01 (CD) < RESISTOR > R631 R632 R633 R634 R636 R637 R638 R640 R641 R642 R643 1-216-849-11 1-216-845-11 1-216-845-11 1-216-841-11 1-216-837-11 1-216-841-11 1-216-837-11 1-216-833-11 1-216-813-11 1-216-813-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 220K 100K 100K 47K 22K 47K 22K 10K 220 220 220 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W

5% 10% 10% 10% 10% 10% 10% 10% 20% 20% 10% 20% 10%

1-216-813-11 METAL CHIP < SWITCH >

1-164-156-11 CERAMIC CHIP 1-126-925-91 ELECT 1-164-156-11 CERAMIC CHIP 1-164-156-11 CERAMIC CHIP 1-164-156-11 CERAMIC CHIP 1-164-156-11 1-164-156-11 1-104-658-91 1-104-658-91 1-104-658-91 CERAMIC CHIP CERAMIC CHIP ELECT ELECT ELECT

20%

S616 S617 S618 S619 S620

1-771-349-21 1-771-349-21 1-771-349-21 1-771-349-21 1-771-349-21

SWITCH, TACT (TUNE/TIME SET ­, .) SWITCH, TACT (ALARM SET BUZZER) SWITCH, TACT (TUNE/TIME SET +, >) SWITCH, TACT (ALARM SET CD) SWITCH, TACT (ALARM MODE)

S621 1-771-349-21 SWITCH, TACT (ALARM SET RADIO) ************************************************************ * A-3347-089-A CD BOARD, COMPLETE ******************* < CAPACITOR > C701 C702 C703 C704 C705 C706 C707 C708 C709 C711 1-162-964-11 1-126-947-11 1-107-826-11 1-162-919-11 1-162-968-11 1-126-960-11 1-115-156-11 1-162-927-11 1-164-156-11 1-162-974-11 CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.001uF 47uF 0.1uF 22PF 0.0047uF 1uF 1uF 100PF 0.1uF 0.01uF 10% 20% 10% 5% 10% 20% 5% 50V 35V 16V 50V 50V 50V 10V 50V 25V 50V

20% 20% 20%

1-164-156-11 CERAMIC CHIP 1-162-970-11 CERAMIC CHIP 1-162-970-11 CERAMIC CHIP < CONNECTOR >

10% 10%

* CNP701 1-779-466-11 CONNECTOR, FFC/FPC 16P * CNP702 1-784-736-11 CONNECTOR, FFC 14P < FERRITE BEAD > FB701 1-469-701-21 FERRITE, EMI (SMD) (1608)

32

ICF-CD843V CD
Ref. No. Part No. Description < IC > IC701 IC702 6-701-617-01 IC LC78645NE-U-E 6-701-787-11 IC BA5826FP-E2 < SHORT > JC701 JC702 JC703 JC704 1-216-864-11 1-216-864-11 1-216-864-11 1-216-813-11 SHORT CHIP SHORT CHIP SHORT CHIP METAL CHIP < COIL > L706 1-414-445-11 FERRITE, EMI (SMD) (1608) 3-831-441-11 CUSHION (B) < TRANSISTOR > < CAPACITOR > Q701 8-729-054-57 TRANSISTOR < RESISTOR > R701 R702 R703 R704 R705 R706 R707 R708 R709 R710 R711 R712 R714 R715 R716 R717 R718 R719 R720 R721 R722 R723 R724 R725 R726 R727 R728 R729 R730 R731 R741 R743 R744 1-216-841-11 1-216-835-11 1-216-835-11 1-216-835-11 1-216-835-11 1-216-841-11 1-216-797-11 1-216-833-11 1-216-837-11 1-216-829-11 1-216-815-11 1-216-809-11 1-216-811-11 1-216-811-11 1-216-821-11 1-216-821-11 1-216-821-11 1-216-809-11 1-216-809-11 1-216-821-11 1-216-809-11 1-216-809-11 1-216-841-11 1-216-819-11 1-216-819-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 47K 15K 15K 15K 15K 47K 10 10K 22K 4.7K 330 100 150 150 1K 1K 1K 100 100 1K 100 100 47K 680 680 2.2K 10K 220 1K 2.2K 6.8K 6.8K 100K 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 0.5% 0.5% 5% 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W 1/10W KTN2907AS-RTK C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C413 C414 C415 C416 C417 C418 C420 C422 C424 C427 C429 C430 C431 C432 C433 C434 C435 C436 C437 C438 C439 C441 C442 C443 C444 C445 C446 C447 C448 C449 1-107-826-11 1-107-826-11 1-107-826-11 1-162-970-11 1-124-584-00 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT 0.1uF 0.1uF 0.1uF 0.01uF 100uF 100PF 0.01uF 0.01uF 100PF 100PF 0.0022uF 100PF 100PF 47PF 100PF 100PF 0.001uF 0.01uF 0.01uF 0.01uF 10K 22PF 22PF 0.1uF 2.2uF 100uF 47PF 47PF 0.01uF 0.01uF 0.1uF 470uF 0.1uF 0.1uF 0.01uF 0.01uF 0.01uF 0.01uF 1uF 1uF 2.2uF 10% 10% 10% 10% 20% 5% 10% 10% 5% 5% 10% 5% 5% 5% 5% 5% 10% 10% 10% 10% 5% 5% 5% 10% 10% 20% 5% 5% 10% 10% 10% 20% 10% 10% 10% 10% 10% 10% 10% 10% 10% 16V 16V 16V 25V 10V 50V 25V 25V 50V 50V 50V 50V 50V 50V 50V 50V 50V 25V 25V 25V 1/10W 50V 50V 16V 6.3V 10V 50V 50V 25V 25V 16V 4V 16V 16V 25V 25V 25V 25V 6.3V 6.3V 6.3V 0 0 0 220 Remark Ref. No. Part No. Description < VIBRATOR > X701 1-795-173-21 VIBRATOR, CERAMIC (33.8688MHz) ************************************************************ A-4547-002-A LCD BOARD, COMPLETE (includes ALARM board and LED board) ******************** 1-823-761-11 3-238-164-01 3-238-169-01 3-243-251-01 3-254-143-01 CABLE, FLEXIBLE FLAT (20 CORE) HOLDER (LCD) CASE (LCD) CUSHION (LIGHT GUIDE PLATE) SCREW (B3), (+) BV TAPPING

LCD
Remark

5%

1/10W

1-162-927-11 CERAMIC CHIP 1-162-970-11 1-162-970-11 1-162-927-11 1-162-927-11 1-162-966-11 1-162-927-11 1-162-927-11 1-162-923-11 1-162-927-11 1-162-927-11 1-162-964-11 1-162-970-11 1-162-970-11 1-162-970-11 1-216-833-11 1-162-919-11 1-162-919-11 1-107-826-11 1-125-838-11 1-124-584-00 1-162-923-11 1-162-923-11 1-162-970-11 1-162-970-11 1-107-826-11 1-126-518-11 1-107-826-11 1-107-826-11 1-162-970-11 1-162-970-11 1-162-970-11 1-162-970-11 1-125-837-11 1-125-837-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP METAL CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP

1-216-825-11 METAL CHIP 1-216-833-11 METAL CHIP 1-216-813-11 METAL CHIP 1-216-821-11 METAL CHIP 1-216-825-11 METAL CHIP 1-218-867-11 METAL CHIP 1-218-867-11 METAL CHIP 1-216-845-11 METAL CHIP < SWITCH >

S701

1-571-936-11 SWITCH, LEAF (LIMIT)

1-125-838-11 CERAMIC CHIP

33

ICF-CD843V LCD
Ref. No. C452 C453 C455 C456 C457 Part No. 1-125-837-11 1-125-837-11 1-115-467-11 1-115-467-11 Description CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 1uF 1uF 0.22uF 0.22uF 0.22uF 10% 10% 10% 10% 10% Remark 6.3V 6.3V 10V 10V 10V R427 R428 R429 R430 R431 R432 R433 R434 R435 R436 R437 R438 R439 R440 R441 R442 R443 R4