Text preview for : KS-FX834.PDF part of JVC KS-FX834 JVC car audio
Back to : KS-FX834.PDF | Home
KS-FX834R
SERVICE MANUAL
CASSETTE RECEIVER
KS-FX834R
Area Suffix E ---- Continental Europe
Contents
Safety precaution Disassembly method Adjustment method Description of major ICs 1-2 1-3 1-10 1-14
This service manual is printed on 100% recycled paper. COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
No.49571 Sep. 2000
KS-FX834R
Safety precaution
! CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.
1-2
KS-FX834R
Disassembly method
Removing the front panel unit
(See Fig.1) 1. Press the release switch and remove the front panel unit in the direction of the arrow.
Fig.1
c
Removing the front chassis (See Fig.2~3)
1. Remove the two screws A attaching the front chassis. 2. Insert a screwdriver to the two joints a on the side of the front chassis, two joints b on the right side and one joint c from upside, then detach the front chassis toward the front side.
A a
Fig.2
b
a
Front chassis
b
Fig. 3
Removing the heat sink (See Fig.4)
1. Remove the three screws B attaching the heat sink on the left side of the body, and remove the heat sink.
B
B
B
Heat sink
Fig. 4
1-3
KS-FX834R
Removing the bottom cover (See Fig.5)
1. Turn the body upside down. 2. Insert a screwdriver to the two joints d and two joints e on both sides of the body and the joint f on the back of the body, then detach the bottom cover from the body.
Bottom cover
d
e f
Fig. 5
Removing the rear panel (See Fig.6 )
1. Remove the front chassis. 2. Remove the heat sink. 3. Remove the bottom cover. 4. Remove the five screws B attaching the rear panel and one screw C attaching the pine jack on the back of the body.
C B B B
Fig. 6
Main board assembly
Removing the main amplifier board assembly (See Fig.7)
1. Remove the front chassis. 2. Remove the bottom cover. 3. Remove the rear panel. 4. Remove the two screws D attaching the main amplifier board assembly on the top cover. 5. Disconnect connector CP701 on the main amplifier board assembly from the cassette mechanism assembly. Fig. 7
CP701
D
D
1-4
KS-FX834R
Removing the Cassette mechanism assembly (See Fig.8)
1. Remove the front chassis. 2. Remove the bottom cover. 3. Remove the main amplifier board assembly. 4. Remove the fore screws F attaching the cassette mechanism assembly from the top cover.
Cassette mechanism assembly
F
F
F
Fig. 8
F Top cover
Removing the control switch board
(See Fig.9 and 10 ) 1. Remove the front panel unit from the main body. 2. Remove the five screws G attaching the rear cover on the back of the front panel unit. 3. Remove the control switch board from the front panel unit.
G
G
G
Fig. 9
G
LCD & Key control board
Fig. 10
1-5
KS-FX834R
Cassette mechanism ass'y
Removing the mecha control P.W.B. (See Fig.1 and 2)
1. For the 6pin harness extending from connector CN402 on the mecha control P.W.B, disconnect it from the head relay P.W.B. 2. Disconnect the card wire from connector CN403 on the mecha control P.W.B. 3. Remove the screw A attaching the mecha control P.W.B. 4. Move the tab a as shown in Fig.2 and remove the mecha control P.W.B. while moving it in the direction of the arrow.
CN402 CN403 CN402 Head relay P.W.B.
6pin harness
CN403
Mecha control P.W.B. Fig.1
Removing the cassette assembly (See Fig.1 to 3)
mechanism
1. Disconnect the 6pin harness from connector CN402 and the card wire from CN403 on the mecha control P.W.B. (Refer to Fig.1 and 2). 2. Remove the four screws B cassette mechanism. on the bottom of the
A
Mecha control P.W.B.
Tab a
Fig.2
B
Cassette mechanism ass'y
Mecha control P.W.B. Fig.3
B
1-6
KS-FX834R
Removing the head relay P.W.B. (See Fig.4)
1. Unsolder the soldering b on the head relay P.W.B. 2. Remove the screw C attaching the head relay P.W.B. 3. Remove the head relay P.W.B. in the direction of the arrow while releasing the two joints c. Fig.4
Cach Soldering b Joint c Head relay P.W.B.
C
Removing the load arm (See Fig.5)
1. Remove the E washer attaching the load arm using a pincette or something like that and remove the spring d. 2. Move the part of the load arm marked upwards to release it from the axis of rotation. Then rotate the load arm in the direction of the arrow to remove it from the cach.
Load arm E washer Spring d
Fig.5
Removing the sub chassis (See Fig.6)
* Prior to performing the following procedure, remove the head relay P.W.B. 1. Remove the screw D attaching the sub chassis. 2. Push the tab e in the direction of the arrow to detach the one side of the sub chassis. Then release the sub chassis from the tab f.
Tab f Tab e Head relay P.W.B.
D
Fig.6
Reinforce bracket
Removing the cassette holder and the holder arm in the eject mode (See Fig.7 and 8)
* Prior to performing the following procedure, remove the head relay P.W.B., the load arm and the sub chassis. 1. Remove the screw E attaching the reinforce bracket. 2. Remove the reinforce bracket. 3. Push the tab g fixing the cassette holder in the direction of the arrow and open the cassette holder and the holder arm upward until they stop at an angle of 45 degrees. Move the two joints h to the side and remove the cassette holder and the holder arm from the shaft.
Sub chassis
Cassette mecha chassis Cassette holder
E
Reinforce bracket tab g
Head relay P.W.B.
Joint h
Load arm Holder arm
Joint h
Fig.7
1-7
KS-FX834R
Cassette holder and holder arm Joint h Shaft
Joint h Shaft
Removing the play head (See Fig.9)
* Prior to performing the following procedure, remove the head relay P.W.B.and the sub chassis. 1. Remove the two screws F attaching the play head (The spring under the play head comes off at the same time).
Pinch roller ass'y
Fig.8
Play head Pinch roller ass'y
Tab i
Tab i
Removing the pinch roller ass'y (See Fig.9)
* Prior to performing the following procedure, remove the head relay P.W.B. and the sub chassis. 1. Push each tab i in the direction of the arrow and pull out the pinch rollers on both sides.
Tab i
F
Spring Tab i
Pinch roller ass'y
Fig.9
Reel disc P.W.B. Soldering j Cassette mechanism ass'y
Removing the reel disc P.W.B. (See Fig.10)
1. Unsolder the soldering j on the reel disc P.W.B.
Tabs k
Tabs k
2. Push the seven tabs k on the bottom of the cassette mechanism assembly in the direction of the arrow.
G
Flywheel Motor Belt
Removing the motor and the sub motor (See Fig.10 and 11)
1. Unsolder the two soldering l of the motor and the sub motor. 2. Release the sub motor from the three tabs m. Push the sub motor upward and pull out it.
G
Fig.10
Soldering j
Sub motor
Tab m Soldering l
Tab m
3. Remove the belt on the bottom of the cassette mechanism assembly and remove the two screws G attaching the motor. ATTENTION: The motors can be detached before removing the load arm.
Tab m Soldering l Load arm Motor
Fig.11
1-8
KS-FX834R
Removing the flywheel (See Fig.10 and 12)
1. Prior to performing the following procedure, remove the head relay P.W.B, the load arm, the sub chassis, the cassette holder, the holder arm and the reel disc P.W.B. 2. Remove the belt on the bottom of the cassette mechanism ass'y. 3. Remove the slit washer attaching the flywheel on the upper side of the cassette mechanism ass'y and pull out the flywheel downward. Then remove another flywheel in the same way. ATTENTION: When reassembling, make sure to use a new slit washer.
Reel disc P.W.B. Soldering j
Cassette mechanism ass'y
Tab k
Tab k
G
Flywheel Motor Belt
G
Slit washer Tab o
Fig.10
Reel driver The part n
Reel disc ass'y( ) Tabs o
Plate
Removing the reel disc ass'y( ) (See Fig.12 to 14)
* Prior to performing the following procedure, remove the head relay P.W.B, the load arm, the sub chassis, the cassette holder and the holder arm. 1. Disengage the part n inside of the reel driver which engages with the shaft, using a pincette or something like that. Then remove the reel driver from the shaft. 2. Remove the reel driver spring and the reel table.
Shaft The part n
Push aside the gear
Slit washer
The part n Reel disc ass'y( ) Reel driver
Fig.12
Reel driver
Fig.13
Reel driver spring
Reel table
Fig.14
1-9
KS-FX834R
Adjustment method
Test instruments required for adjustment
1. Digital oscilloscope(100MHz) 2. Frequency Counter meter 3. Electric voltmeter 4. Wow & flutter meter 5. Test Tapes
MC-109C ................... For TAPE CURL confirmation (without Pad type) VT724 .......................For DOLBY level measurement VT739 ............ For playback frequency measurement
Standard volume position
Balance and Bass,Treble volume .Fader :Center(Indication"0") Loudness,Dolby NR,Sound,Cruise:Off following conditions. Playback the test tape VT721. AM mode 999kHz/62dB,INT/400Hz,30% modulation signal on receiving. FM mono mode 97.5MHz/66dB,INT/400Hz,22.5kHz deviation pilot off mono FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev. Output level 0dB(1 V,50 /open terminal)
VT712 .... For wow flutter & tape speed measurement VT703 ..................... For head azimuth measurement 6. Torque gauge .................... Cassette type for CTG-N (mechanism adjustment)
Measuring conditions(Amplifier section)
Power supply voltage .............. DC14.4V (10.5 - 16V) Load impedance ........... 4 (2 Speakers connection) Line out ............................................................ 20k
1-10
KS-FX834R
Arrangement of adjusting & test points
Cassette mechanism (Surface)
Motor assembly
Tape speed adjust
Azimuth screw A (Forward)
Playback head
Azimuth screw B (Reverse)
Head section view
Azimuth screw B (Reverse) Playback Head
Azimuth screw A (Forward)
1-11
KS-FX834R
Information for using a car audio service jig
1. We're advancing efforts to make our extension cords common for all car audio products. Please use this type of extension cord as follows. 2. As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly after disassembly. 3. Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly and main board assembly. Check for mechanism driving section such as motor ,etc..
Disassembly method
Remove the bottom cover. Remove the front panel assembly. Remove the top cover . Install the front panel. Confirm that current is being carried by connecting an extension cord jig. Note Available to connect to the CP701 connector when installing the front panel. Extension cord EXTKSRT002-18P 1. 2. 3. 4. 5. Cassette mechanism
Main board
to Cassette mechanism Front panel assembly
to Main board
EXTKSRT002-18P
1-12
KS-FX834R
Mechanism adjustment section
Item 1. Tape running adjustment Adjusting & Confirmation Methods a) At Forward playmode, using mirror tape, make adjustment with Azimuth screw A and Azimuth screw B, without curl of 4 parts of head tape guide. b) At Reverse play mode, using mirror tape, make adjustment with Azimuth screw A and Azimuth screw B, without tape curl of 4 parts of head guide. c) At Forward / Reverse play mode, make confirmation of no tape curl of 4 parts of head tape guide. a) At forward play mode, make adjustment of peak of Lch / Rch output with Azimuth screw A. * For Oscilloscope litharge corrugation, set 45 as standard. b) At Reverse play mode, make adjustment of peak of Lch / Rch output with Azimuth screw B. * For Oscilloscope litharge corrugation, set 45 as standard. c) With AC volt meter confirm the difference of output for 4ch between Lch / Rch at forward play mode and Lch / Rch Reverse play mode being within 3.0dB. d) After operation, make confirmation of Lch / Rch azimuth output being within 1.0dB from adjustment value.
HEAD
Adjust
Std. Value
Azimuth screw A
Azimuth screw B
2. Azimuth adjustment confirmation
0
Phase
45
Tape guide
OK
Tape curl NG
HEAD
TAPE
Tape Speed 2.Tape Speed and 1.Check to see if the reading of the frequency counter & W ow Built-in flutter meter is within 2940-3090 Hz( FWD/REV ), and less volume resistor 2940-3090Hz Wow & Flutter than 0.35% ( JIS RMS ). Wow&Flutter 2.In case of out of specification, adjust the motor with a builtLess than in volume resistor . 0.35% (JIS RMS) 3.Playback Frequency response 1.Play the test tape ( VT724 : 1kHz ) back and set the volume position at 2V . 2.Play the test tape ( VT739 )back and confirm 0 3dB at1kHz/ 10kHz and -4+2dB at 1kHz/63Hz. 3.When 10kHz is out of specification, it will be necessary to read adjust the azimuth. Speaker out 1kHz/10kHz : 0dB 3dB, 63Hz/1kHz : -4dB+2dB,
1-13
KS-FX834R
Description of major ICs
CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp.
1.Pin layout & block diagram
TAPEIN2 PBOUT2 LINEOUT2 OUTREF2 PBTC2 MSSW
21 20 MSMODE 19 DRSW T2 x1 BIAS MUTE TAPE EQ NR MODE FWD/RVS 30k LPF F1 PBGND 38 300k PBRIN1 39 7k/12k PBFB1 40 1 2 3 + F3 x1 T1 Vcc + 15 NC MS ON/ OFF DET 13 MSTC 12 G1FB 11 G2FB 9 10 14 MSOUT 16 NRSW MS MODE 18 TAPESW 17 MUTESW
DIREF
GND
TCH2
23 NR OFF/B OFF/B NR 8
30 PBFB2 31 PBRIN2 32 PBGND 33 PBFIN2 34 30k VCT 35 45k PBREF 36 PBFIN1 37
29
28
27
26
25
24
22
7k/12k
70 /120
100k
300k + F2
70 /120
100k
4
5
6
PBTC1
OUTREF1
+ -
7
LINEOUT1
PBOUT1
TCH1
Vcc
NC
NC
NC
2. Pin function Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Symbol PBTC1 PBOUT1 OUTREF1 TAPEIN1 Vcc NC LINEOUT1 TCH1 NC MSLPF G2FB G1FB MSTC MSOUT NC NRSW MUTESW TAPESW DRSW MSMODE MSSW NC TCH2 LINEOUT2 I/O Function Playback equalizer amplifier capacitance O Playback equalizer amplifier output O Output reference I TAPE input - Power supply O Line output - Time constant for the HLS Cut-off frequency adjustment of the music sensor LPF - Music signal interval detection - Music signal interval detection - Time constant for detecting music signal interval O Music sensor out - No use I Dolby NR control I Mute function control I Playback equalizer amplifier control I Head select control I Music sensor mode control I Music sensor control - Time constant for the HLS O Line output Pin No. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Symbol DIREF GND TAPEIN2 OUTREF2 PBOUT2 PBTC2 PBFB2 PBRIN2 PBGND PBFIN2 VCT PBREF PBFIN1 PBGND PBRIN1 PBFB1 I/O I O O I I I O O I I I Function Resistance for setting the reference Ground TAPE input Output reference Playback equalizer amplifier output Playback equalizer amplifier capacitance Playback equalizer amplifier feedback Playback equalizer amplifier input Playback equalizer amplifier ground Playback equalizer amplifier input Center Playback equalizer amplifier reference Playback equalizer amplifier input Playback equalizer amplifier ground Playback equalizer amplifier input Playback equalizer amplifier feedback
1-14
TAPEIN1
MSLPF
+
KS-FX834R
BA4905-V3 (IC901) : Regulator
1.Terminal layout
1
2
3
4
5
6
7
8
9
10
11
12
2.Block diagram
REGULATOR
EXT
Overvoltage protection circuit
37K 5K
RESET
1 RESET
2 EXT
3 COMP
4 ACC
5 VDD 5.7V
6 AUDIO 9V
7 CD 8V
8 CTRL
9 VCC
10 ILM 10V
11 AJ
12 GND
3.Pin function Pin no. 1 2 3 4 5 Symbol RESET EXT output COMP output ACC VDD output Function If VDD voltage becomes 4V or less.RESET output becomes low level. This output voltage is approximately 0.5V lower than VCC. and max output current is 300mA. A voltage supply for ACC block. This output voltage is approximately 0.7V lower than VDD'S. The max output current is 100mA. Control of the COMP output by inputting voltage. This output voltage is 5.7V, and max output current is 100mA. This voltage supply is for microcomputer. Whenever back up voltage supply is connected, the output keeps on running. This output voltage is 9.0v, and max output current is 500mA. This voltage supply for AUDIO. This output voltage is 8.0V, and max output current is 1A. This voltage supply for CD. Output selector of CD. AUDIO, ILM and EXT. To be connected with the BACK UP of car. This output voltage is 10V, and max output current is 500mA. Output voltage is adjustable. Putting a resistance between ILM and AJ or between AJ and GND makes ILM output voltage adjustable. Ground.
6 7 8 9 10 11 12
AUDIO output CD output CTRL VCC ILM output AJ GND
1-15
KS-FX834R UPD178018AGC-551 (IC701) : Main system control CPU
1. Pin layout
80 1 ~ ~ 61 60 ~ 41 21 ~ 40
20
2. Pin function Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Port Name KEY 0 KEY 1 KEY 2 LEVEL SM SQ LCDCE LCDDA LCDSCK BUSI/O OPEN BUSSI BUSSO BUSSCK NC NC NC NC INLOCK NC GNDPORT VDDPORT NC AFCK MONO FM/AM SEEK/STP NC IFC VDDPLL FMOSC NC GNDPLL AMEO FMEO IC SD/ST STAGE0 NC MOTOR I/O I I I I I I O O O I I I O I/O O O O O O I I I O O I I O Descriptions Key input 0 Key input 1 Key input 2 Level meter input S.meter level input S.Quality level input CE output to LCD driver Data output to LCD driver Clock output to LCD driver I/O selector output for J-BUS, H : OUT, L: INPUT Door open detect input J-BUS Data input J-BUS Data output J-BUS Clock in/output Non connect Non connect Non connect Non connect Non connect Non connect Port GND Port Vdd Non connect AF check output, L: AF check Monaural on /off selecting output, H:mono on FM/AM switching output L : FM H : AM Auto seek /stop selecting output, H: Seek, L:Stop Pulse signal input port for Cruise control FM/AM midle frequency counter input PLL Vdd FM/AM limited generator frequency input None connect PLL GND AM error out output FM error out output GND Station detector, Stereo signal input, H:Find Station, L:Stereo Pull up Non connect Main motor output
1-16
KS-FX834R
UPD178018AGC-551
Pin No. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
Port Name FF/REW F/R DOLBY MSIN I2CCLK I2CDAO I2CDAI REEL SUBMO1 SUBMO2 MODE TAPEIN STANDBY NC NC NC NC NC BEEP MUTE PCNT TELMUTE DIMIN DIMOUT ENC1 ENC2 ACCDET POWER RDSSCK RDSDA REMOCON DETACH J-BUSINT REGCPU GND X2 X1 REGOSC VDD RESET
I/O I O O I O O I O I O O O I O O O I I O I I I O I I I I I I -
Descriptions Output for input signal level switching for MS L : FF,REW H : PLAY FWD,REV running direction switch signal input Dolby on "H" output MS input I2C information clock output I2C information data output I2C information clock input Switch for detecting tape end position Sub motor clock direction input Sub motor clock opposite detection drive output Mechanism mode position detection input Cassette in detection input H : cassette in L : cassette out Standby position detection input H : eject side L : operation side Non connect Non connect Non connect Non connect Non connect Touch tone output Mute output , L : mute on Power ON /OFF switching output , H : power on Telephone mute signal detection input Dimmer signal detection input L : dimmer Dimmer control output , Dimmer off L output Rotary volume signal 1 input Power save : L Rotary volume signal 2 input Power save 1 Working together ACC Clock input for RDS RDS data input Remocom input Detach signal input H : Power save Cut-in input for J-BUS signal Regulator for CPU power supply, Connect the GND with0.1 F. Ground Connecting the crystal oscillator for system clock Connecting the crystal oscillator for system clock Regulator for oscillator circuit.Connect the GND with 0.1 F. Vdd Pull up Power save : L Power save 2, Working together Back up by H input, stop mode
1-17
KS-FX834R
HA13158A (IC301) : Power amp
1. Pin layout
1 2. Block diagram
~
23
14 2
18
6
INVCC STBY
PVCC2
PVCC1 +
3 4 5 7
IN1
1
INPUTBUFFER1
AMP1 -
+ IN2
11
INPUTBUFFER2
AMP2 -
8 9 15
+ IN3
13
INPUTBUFFER3
AMP3 -
16 17 19
+ IN4
23 10
INPUTBUFFER4
AMP4 -
20 21
MUTE
PROTECTOR (ASO SURGE, TSD)
12 22
TAB
1-18
KS-FX834R
HD74HC126FP-X (IC801) : Buffer
1. Pin layout 1 2 3 4 5 6 7 14 13 12 11 10 9 8 2. Function Inputs C A L X H L H H Outputs Y Z H L
3. Block diagram Vcc
Vcc
1k 1A 2A 3A 4A 1C 2C 3C 4C
Output
1Y 2Y CL
S1
Input
See Function Table
1k
2Y 3Y
Output
Sample as Load Circuit 1
Output
Sample as Load Circuit 1
Output
4Y
Sample as Load Circuit 1
1-19
KS-FX834R
RPM6938-SV4 (IC602) : Remote control receiver
Vcc AGC AMP
I/V conversion
Vcc 22k ohm Rout
Comp BPF Detector
PD
for trimming circuit
magnetic shield
GND
LB1641 (IC402) : DC Motor Driver
1. Pin Layout 2. Pin Functions
Input IN1 IN2 Output OUT1 OUT2 Mode Brake CLOCKWISE COUNTER-CLOCKWISE Brake
0 1
1 2 3 4 VZ 5 IN1 6 7 8 9
10
0 0 1 1
0 1 0 0
0 0 1 0
0 1
GND OUT1 P1
IN2 VCC1 VCC2 P2
OUT2
1-20
KS-FX834R LC75873NW (IC601) : LCD Driver
1.Block Diagram
COM3 COM2 COM1 S68 S67 S5 S4/P4 S3/P3 S2/P2 S1/P1
SEGMENT DRIVER SHIFT REGISTER ADDRESS DETECTOR
VDD1 VDD2
COMMOM DRIVER
INH OSC VDD VSS CLOCK GENERATOR
2.Pin Functions Pin No. 1~66 67~69 70 71 72 73 74 75 76 77 78 79 80 Symbol S3~S68 COM1~3 VDD VDD1 VDD2 VSS OSC INH CE CLOCK DI DIMMER NC I/O O O I I I/O I I I I O Segment Output. Common Driver Output. Power Supply Connection. Used for applying the LCD drive 2/3 bias voltage externally. Must be connected to VDD2 when a 1/2 bias drive scheme in used. Used for applying the LCD drive 1/3 bias voltage externally. Must be connected to VDD1 when a 1/2 bias drive scheme in used. Power supply connection. Oscillator connection. An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. Display off control input. Chip enable input. Synchronization clock input. Serial data input. DIMMER Control signal output. Non connect. Description
1-21
KS-FX834R SAA6579T-X (IC71) : RDS demodulator
1. Pin layout 2. Pin function
Pin No.
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Symbol QUAL RDDA Vref MUX VDDA VSSA CIN SCOUT MODE TEST VSSD VDDD OSCI OSCO T57 RDCL
Function Quality indication output RDS data output Reference voltage output (0.5VDDA) Multiplex signal input +5V supply voltage for analog part Ground for analog part (0V) Sub carrier input to comparator Sub carrier output of reconstruction filter Oscillator mode / test control input Test enable input Ground for digital part (0V) +5V supply voltage for digital part Oscillator input Oscillator output 57kHz clock signal output RDS clock output
3. Block diagram
OSCI 13 ANTIALIASING FILTER 57kHz BAND PASS (8th ORDER)
OSCO 14
VDDD 12
MUX
4
RECONSTRUCTION FILTER
OSCILLATOR AND DIVIDER
QUALITY BIT GENERATOR
1 QUAL
SCOUT
8
CIN
7
CLOCKED COMPARATOR
COSTAS LOOP VARIABLE AND FIXED DIVIDER
BIPHASE SYMBOL DECODER
DIFFERENTIAL 2 DECODER
RDDA
VDDA
5
Vp1 CLOCK REGENERATION AND SYNC
16
RDCL
Vref
3
REFERENCE VOLTAGE
TEST LOGIC AND OUTPUT SELECTOR SWITCH
15
T57
6 VSSA
9 MODE
10 TEST
11 VSDD
1-22
KS-FX834R TEA6320T-X (IC161) : E.volume
1.Pin Layout 2.Block Diagram
10 8 9 7 6 5 12
SDA GND OUTLR OUTLF TL B2L B1L IVL ILL QSL IDL MUTE ICL IMD IBL IAL
1 2 3 4 5 6 7 8 9 10 11 12 13 CD-CH 14 15 TAPE 16 TUNER
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
SCL VCC OUTRR OUTRF TR B2R B1R IVR ILR QSR IDR Vref ICR CAP IBR IAR
21 31 2 19
POWER SUPPLY
MUTE FUNCTION ZERO CROSS DETECTOR VOLUME 1 +20 to -31 dB LOUDNESS LEFT BASS LEFT +15 dB TREBLE LEFT +12 dB
VOLUME 2 0 to 55 dB BALANCE FENDER REAR
3
VOLUME 2 0 to 55 dB BALANCE FENDER FRONT
4
16 15 13 11 14 22 20 18 17
LOGIC
SOURCE SELECTOR VOLUME 1 +20 to -31 dB LOUDNESS RIGHT BASS RIGHT +15 dB TREBLE RIGHT +12 dB
HC BUS REC
32 1
VOLUME 2 0 to -55dB BALANCE FENDER FRONT
29
VOLUME 2 0 to -55dB BALANCE FENDER REAR
30
23
25
24
26 27
28
3.Pin Functions Pin No. Symbol I/O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SDA GND OUTLR OUTLF TL B2L B1L IVL ILL QSL IDL MUTE ICL IMO IBL IAL
Functions
Pin No. Symbol I/O 17 18 19 20 21 22 23 24 25 26 27 28
IAR IBR CAP ICR Vref IDR QSR ILR IVR B1R B2R TR I I I O I I O I
Functions
Input A right source. Input B right source. Electronic filtering for supply. Input C right source. Reference voltage (0.5Vcc) Not used Output source selector right channel. Input loudness right channel. Input volume 1. right control part. Bass control capacitor right channel Bass control capacitor right channel or output to an external equalizer. Treble control capacitor right channel or input from an external equalizer. Output right front. Output right rear. Supply voltage. Serial clock input.
I/O Serial data input/output. O O I I I O I I I Ground. output left rear. output left front. Treble control capacitor left channel or input from an external equalizer. Bass control capacitor left channel or output to an external equalizer. Bass control capacitor left channel. Input volume 1. left control part. Input loudness. left control part. Output source selector. left channel. Not used Not used Input C left source. Not used Input B left source. Input A left source.
29 OUTRF O 30 OUTRR O 31 32
Vcc SCL I
1-23
KS-FX834R
VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan
(No.49571)
Printed in Japan 200009(V)