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SERVICE MANUAL
COLOR TELEVISION
3
2004
YA053
AV-27F475 /S, AV-27F475 /Z,
AV-27F485 /S, AV-27F485 /Z
BASIC CHASSIS
GJ4
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5 TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.YA053
2004/3
SPECIFICATION
Contents
Items
AV-27F475 AV-27F485
Dimensions (W × H × D) 82.9 cm × 59.3 cm × 51.9cm (32-5/8" × 23-3/8" × 20-1/2")
Mass 43.0kg (94.6Ibs)
TV RF System CCIR (M)
Color System NTSC
Sound System BTSC (Multi Channel Sound)
TV Receiving Channels VHF low 02ch~06ch : 54MHz~88MHz
and Frequency VHF high 07ch~13ch : 174MHz~216MHz
UHF 14ch~69ch : 470MHz~806MHz
CATV 54MHz~804MHz
Low Band : 02~06, A-8 by 02~06&01
High Band : 07~13 by 07~13
Mid Band : A~I by 14~22
Super Band : J~W by 23~36
Hyper Band : W+1~W+28 by 37~64
Ultra Band : W+29~W+84 by 65~125
Sub Mid Band : A8, A4~A1 by 01, 96~99
TV / CATV Total Channel 180 Channels
Intermediate Frequency Video IF 45.75 MHz
Sound IF 41.25 MHz (4.5MHz)
Color Sub Carrier 3.58 MHz
Power Input AC120V, 60Hz
Power Consumption 140W
Picture Tube (Visible size) 68cm (27") Measured diagonally (H : 54.4cm × W : 41.8cm)
High Voltage 30.0kV ±1.3kV [at Zero beam current]
Speaker 6.5cm × 13cm (2-1/2" × 5"), Oval type × 2
Audio Power Output 7.5W + 7.5W 9W + 9W
Antenna Terminal (VHF / UHF) F-type connector, 75 unbalanced
Video / Audio input Component Video RCA pin jack × 3
Input-1/2/3 [Input-2] Y : 1V(p-p), negative sync, 75
Pb/Pr : 0.7V(p-p), 75
S-video Mini DIN 4-pin × 1
[Input-1] Y : 1V(p-p), negative sync, 75
C : 0.286V(p-p)(burst signal), 75
Video 1V(p-p), negative sync, 75 , RCA pin jack × 3
Audio 500mV(rms)(-4dBs), high impedance, RCA pin jack × 6
Audio Output (Fix) 500mV(rms)(-4dBs), low Impedance, (400kHz when modulated 100%),
RCA pin jack × 2
Remote Control Unit RM-C1258G (AA/R6/UM-3 battery × 2)
Design & specifications are subject to change without notice.
1-2 (No.YA053)
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(1) The design of this product contains special hardware, many (10) Isolation Check (Safety for Electrical Shock Hazard)
circuits and components specially for safety purposes. For After re-assembling the product, always perform an isolation
continued protection, no changes should be made to the original check on the exposed metal parts of the cabinet (antenna
design unless authorized in writing by the manufacturer. terminals, video/audio input and output terminals, Control knobs,
Replacement parts must be identical to those used in the original metal cabinet, screw heads, earphone jack, control shafts, etc.) to
circuits. Service should be performed by qualified personnel only. be sure the product is safe to operate without danger of electrical
(2) Alterations of the design or circuitry of the products should not be shock.
made. Any design alterations or additions will void the a) Dielectric Strength Test
manufacturer's warranty and will further relieve the manufacturer The isolation between the AC primary circuit and all metal parts
of responsibility for personal injury or property damage resulting exposed to the user, particularly any exposed metal part having a
therefrom. return path to the chassis should withstand a voltage of 1100V AC
(3) Many electrical and mechanical parts in the products have special (r.m.s.) for a period of one second.
safety-related characteristics. These characteristics are often not (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rat-
evident from visual inspection nor can the protection afforded by them ed up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V
necessarily be obtained by using replacement components rated for or more, for a period of one second.) This method of test requires
higher voltage, wattage, etc. Replacement parts which have these a test equipment not generally found in the service trade.
special safety characteristics are identified in the parts list of Service b) Leakage Current Check
manual. Electrical components having such features are Plug the AC line cord directly into the AC outlet (do not use a line
identified by shading on the schematics and by ( ) on the isolation transformer during this check.). Using a "Leakage
parts list in Service manual. The use of a substitute replacement Current Tester", measure the leakage current from each exposed
which does not have the same safety characteristics as the metal part of the cabinet, particularly any exposed metal part
recommended replacement part shown in the parts list of Service having a return path to the chassis, to a known good earth ground
manual may cause shock, fire, or other hazards. (water pipe, etc.). Any leakage current must not exceed 0.5mA AC
(4) Use isolation transformer when hot chassis. (r.m.s.).
The chassis and any sub-chassis contained in some products are However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).
connected to one side of the AC power line. An isolation Alternate Check Method
transformer of adequate capacity should be inserted between the Plug the AC line cord directly into the AC outlet (do not use a
product and the AC power supply point while performing any line isolation transformer during this check.). Use an AC
service on some products when the HOT chassis is exposed. voltmeter having 1000 per volt or more sensitivity in the
(5) Don't short between the LIVE side ground and ISOLATED (NEU- following manner. Connect a 1500 10W resistor paralleled by
TRAL) side ground or EARTH side ground when repairing. a 0.15µF AC-type capacitor between an exposed metal part and
Some model's power circuit is partly different in the GND. The differ- a known good earth ground (water pipe, etc.). Measure the AC
ence of the GND is shown by the LIVE : ( ) side GND, the ISOLAT- voltage across the resistor with the AC voltmeter. Move the
ED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. resistor connection to each exposed metal part, particularly any
Don't short between the LIVE side GND and ISOLATED (NEUTRAL) exposed metal part having a return path to the chassis, and
side GND or EARTH side GND and never measure the LIVE side measure the AC voltage across the resistor. Now, reverse the
GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at plug in the AC outlet and repeat each measurement. Any
the same time with a measuring apparatus (oscilloscope etc.). If voltage measured must not exceed 0.75V AC (r.m.s.). This
above note will not be kept, a fuse or any parts will be broken. corresponds to 0.5mA AC (r.m.s.).
(6) If any repair has been made to the chassis, it is recommended that However, in tropical area, this must not exceed 0.3V AC
the B1 setting should be checked or adjusted (See B1 POWER (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
SUPPLY check).
AC VOLTMETER
(7) The high voltage applied to the picture tube must conform with that (HAVING 1000 /V,
OR MORE SENSITIVITY)
specified in Service manual. Excessive high voltage can cause an
increase in X-Ray emission, arcing and possible component
damage, therefore operation under excessive high voltage
conditions should be kept to a minimum, or should be prevented.
0.15 F AC-TYPE
If severe arcing occurs, remove the AC power immediately and
determine the cause by visual inspection (incorrect installation, PLACE THIS PROBE
ON EACH EXPOSED
cracked or melted high voltage harness, poor soldering, etc.). To 1500 10W METAL PART
maintain the proper minimum level of soft X-Ray emission, GOOD EARTH GROUND
components in the high voltage circuitry including the picture tube (11) High voltage hold down circuit check.
must be the exact replacements or alternatives approved by the After repair of the high voltage hold down circuit, this circuit shall
manufacturer of the complete product. be checked to operate correctly.See item "How to check the high
(8) Do not check high voltage by drawing an arc. Use a high voltage voltage hold down circuit".
meter or a high voltage probe with a VTVM. Discharge the picture
tube before attempting meter connection, by connecting a clip lead This mark shows a fast POWER CORD
operating fuse, the REPLACEMENT WARNING.
to the ground frame and connecting the other end of the lead letters indicated below Connecting the white line side of power
through a 10k 2W resistor to the anode button. show the rating. cord to "WHT" character side.
(9) When service is required, observe the original lead dress. Extra PWB
precaution should be given to assure correct lead dress in the high White line side
voltage circuit area. Where a short circuit has occurred, those
components that indicate evidence of overheating should be A V PW
replaced. Always use the manufacturer's replacement WHT
components.
(No.YA053)1-3
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
SMART CAPTION [AV-27F485] MTS STEREO
Smart caption will appear when you press the MUTING button, The voice multiplex function of the MTS system is built in.
only on channels where the broadcast contains CLOSED (MTS = Multi channel Television Sound system)
CAPTION information. RETURN PLUS
SMART SOUND You program a specific channel to return to while scanning
Decreases high sound levels, giving a regulated sound level. through the channels using the CH+ and CH - keys.
FLAT SQUARE CRT VIDEO INPUT LABEL
It became legible from any position by CRT with few reflection This function is used to label video input connections for the
and reflect lumps on the flat screen. onscreen displays.
DIGITAL COMB FILTER WORLD CLOCK
By the 3 line digital comb filter, the refreshed image can be The world clock feature provides time differences for some of
seen. the major cities around the world in real time.
VIDEO STATUS BBE
Expression of a favorite screen can be chosen by the VIDEO High definition audio adds natural, clear and extraordinary
STATUS function. sound quality to any program.
[STANDARD DYNAMIC THEATER GAME] A.H.S. [AV-27F485]
COMPONENT INPUT Adds a more spacious surround sound. Music gives basic
Since the component signal input terminal is equipped, it effect and Movie for more effect.
reappears direct without deteriorating the signal from DVD. HYPER SURROUND [AV-27F475]
V-CHIP Creates a deep, three-dimensional sound effect by channeling
Since the V-CHIP is built in, it can choose, view and listen to a the audio through the TV's front-firing speakers.
healthy program.
2.2 HOW TO IDENTIFY MODELS
How to recognize from the appearance of the model concerned is written below. Please distinguish from several contents currently
printed on the rating label
MODEL NAME
AV-27F475
MODEL NO. AV-27F485
AC 120V 60Hz W
TV SCREEN SIZE : DIAGONAL INCHES ME
CHASSIS NO.
MANUFACTURED
SERIAL NO. VIDEO EQUIPMENT
4C43 DISTINGUISH NAME
S
Z
2.3 MAIN DIFFERENCE LIST
The difference between S models and Z models are in the PICTURE TUBE.
Item AV-27F475/S AV-27F475/Z AV-27F485/S AV-27F485/Z
PICTURE TUBE (ITC) A68QCP693X003 A68QCU770X78N A68QCP693X003 A68QCU770X78N
SMART CAPTION NO YES
A.H.S. NO YES
HYPER SURROUND YES NO
1-4 (No.YA053)
2.4 TECHNICAL INFORMATION
2.4.1 SYSTEM BLOCK DIAGRAM
REMOCON REMOCON
RECEIVER AFT1 IC101
IC201
IF DET
MAIN MI-COM /
IC702 SCL1 VIDEO PROCESS /
DEF. PROCESS
MEMORY SDA1
SCL0 SDA0
SCL0 SDA0 SCL0 SDA0 SCL0 SDA0 SCL0 SDA0 SCL0 SDA0
IC5001 IC5501 IC5201 TU001 IC502
MTS LATCH&
AV SW 3-LINE YC SEP. TUNER D-A CONVERTER
TONE/VOL
2.4.2 MAIN MI-COM (CPU) PIN FUNCTION
Pin Pin
Pin name I/O Function Pin name I/O Function
No. No.
1 MTS_ADJ I Not used 29 YC_GND - GND
2 AFT1 I AFT voltage for tuner (Tuning frequency control) 30 V1_IN I Not used
3 KEY I Key scan for front control [No signal : H] 31 ABCL I Current for automatic beam (brightness)/contrast limit
4 uP_DVss - GND 32 MONITOR_OUT O Not used
5 Reset I CPU reset 33 BLACK_DET - Black level detection filter
6 8MHz_OUT O CPU system clock : 8MHz oscillation 34 SVM_OUT O Y signal for velocity scan modulation
7 8MHz_IN I CPU system clock : 8MHz oscillation 35 APL_FIL - Average picture level filter
8 TEST - GND 36 APC_FIL - Automatic phase control filter
9 uP_DVDD - 5V 37 fsc_OUT O Color sub carrier (3.58MHz) for 3-line digital comb filter [IC5201]
10 AGC_MUTE O AGC muting for tuner (when channel select) [Muting : H] 38 YC_Vcc - 5V (for video process circuit)
11 uP_VVSS - GND 39 R_OUT O R signal
12 TV_HGND - GND 40 G_OUT O G signal
13 FBP_SCP I Flyback pulse (H. pulse) 41 B_OUT O B signal
14 HOUT O H. drive (oscillation) 42 RGB_Vcc - 9V (for RGB process circuit)
15 H_Vcc - 9V (for H. oscillation start) 43 IK_IN I Not used
16 HAFC_1 - H. AFC filter 44 TV_DGND - GND
17 Vsaw - V. saw filter 45 uP_AGND - GND
18 VOUT O V. drive 46 uP_AVdd - 5V
19 EW_OUT O Parabola waveform (for sidepin correection) 47 MAIN_POWER O Power on/off switching control [Powen on : L]
20 X-RAY I X-ray detection (for protection) [Detection : H] 48 PANORAMA I Not used
21 Ys I Not used 49 SDAO I/O Data for Inter IC control bus (for various devices)
22 Cb_IN I Cb (external) signal 50 SCLO O Clock for Inter IC control bus (for various devices)
23 Y_IN I Y (external) signal 51 SDA1 I/O Data for Inter IC control bus (for main memory)
24 Cr_IN I Cr (external) signal 52 A_MUTING O Audio muting [Muting : H]
25 TV_DVcc - 3.3V 53 SCL1 O Clock for Inter IC control bus (for main memory)
26 V3IN/CIN I Chroma signal (for YC separation output) 54 LED O POWER / ON TIMER LED lndication [lighting : L]
27 EHT_IN I Not used 55 REMOCON I Remote control sensor input [No input : H]
28 V2_IN/Y_IN I Y signal (for YC separation output) 56 ASP_ABL I Not used
(No.YA053)1-5
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER 3.1.7 CHECKING THE CHASSIS
(1) Disconnect the power plug. To check the PW Board from back side.
(2) Remove the 11 screws [A]. (1) Pull out the CHASSIS (refer to REMOVING THE CHASSIS).
(3) Withdraw the REAR COVER backward. (2) Erect the CHASSIS vertically with the HVT side facing up
so that you can easily check the back side of the PW board.
CAUTION :
3.1.2 REMOVING THE AV TERMINAL BOARD · When erecting the CHASSIS, be careful so that there will be
· Remove the REAR COVER. no contacting with other PW Board.
(1) Remove the 5 screws [B]. · Before turning on power, make sure that the wire connector
(2) Withdraw the AV TERMINAL BOARD toward you. is properly connected.
· When conducting a check with power supplied, be sure
to confirm that the CRT EARTH WIRE (BRAIDED ASS'Y)
3.1.3 REMOVING THE CHASSIS is connected to the CRT SOCKET PWB.
· Remove the REAR COVER.
· Remove the AV TERMINAL BOARD.
(1) Slightly raise the both sides of CHASSIS by hand. 3.1.8 WIRE CLAMPING AND CABLE TYING
(2) Remove the 2 claws under the both side of the CHASSIS (1) Be sure to clamp the wire.
from the front cabinet. (2) Never remove the cable tie used for tying the wires together.
(3) Withdraw the CHASSIS backward. Should it be inadvertently removed, be sure to tie the wires
(If necessary, remove the wire clamp, connectors etc.) with a new cable tie.
3.1.4 REMOVING THE SPEAKER
· Remove the REAR COVER.
(1) Remove the 2 screws [C].
(2) Remove the 2 screws [D] and remove the SPEAKER.
(3) Follow the same steps when removing the other hand
SPEAKER.
NOTE :
When remove the 2 screws [C] of the SPEAKER, remove the
lower side screw first, and then remove the upper one.
3.1.5 REMOVING THE LED & POWER SW PWB
· Remove the REAR COVER.
(1) Remove the 2 screws [E].
(2) Withdraw the LED & POWER SW PWB toward you.
*If necessary, remove the wire clamp, connector etc.
3.1.6 REMOVING THE FRONT CONTROL PWB
· Remove the REAR COVER.
(1) Remove the 2 screws [F].
(2) Withdraw the FRONT CONTROL PWB toward you.
*If necessary, remove the wire clamp, connector etc.
1-6 (No.YA053)
SPEAKER
D
FRONT CABINET
C
CRT SOCKET PWB SPEAKER HOLDER
FRONT CONTROL PWB
MAIN PWB
CLAW
LED & POWER SW PWB F
E
POWER CORD
CLAW
AV TERMINAL
AV SELECTOR BOARD
PWB
B
REAR COVER
A
Fig.1
(No.YA053)1-7
3.2 MEMORY IC REPLACEMENT 3.2.2 SERVICE MODE SETTING ITEMS
· This model uses the memory IC. SERVICE MENU
· This memory IC stores data for proper operation of the video
and drive circuits. SERVICE MENU
· When replacing, be sure to use an IC containing this (initial val- 1. V/C(S) 2. DEF(D)
ue) data. 3. SOUND(A) 4. OTHERS(F)
3.2.1 MEMORY IC REPLACEMENT PROCEDURE 5. 3L Y/C(LYC)
7. LOW LIGHT 8. HIGH LIGHT
1. Power off 9. VCO
Switch off the power and disconnect the power cord from the 11. I2C BUS 12. SYSTEM(SYS)
wall outlet.
2. Replace the memory IC
Be sure to use a memory IC written with the initial setting data. SELECT BY
OPERATE BY EXIT BY EXIT
3. Power on
Connect the power cord to the wall outlet and switch on the Fig.1
power. Setting items Settings Item No.
4. Receiving channel setting 1. V/C
Adjust S01~S48
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) (Video setting)
and set the receive channels (Channels Preset) as described. 2. DEF
Adjust D01~D33
5. User settings (Deflection setting)
Check the user setting items according to the "FACTORY 3. SOUND(A)
Adjust A01~A08
SETTING ITEM" table. (Audio setting)
Where these do not agree, refer to the OPERATING 4. OTHERS [Do not adjust]
INSTRUCTIONS (USER'S GUIDE) and set the items as Fixed F01~F18
(Factory setting)
described.
5. 3L Y/C [Do not adjust]
6. SERVICE MODE setting Fixed LYC01~LYC12
(Y/C Separate setting)
Verify what to set in the SERVICE MODE, and set whatever is 7. LOW LIGHT
necessary(Fig.1) . Adjust ---
(White balance setting)
Refer to the SERVICE ADJUSTMENT for setting.
8. HIGH LIGHT
Adjust ---
(White balance setting)
9. VCO
Adjust ---
(VCO setting)
11. I2C BUS [Do not adjust]
Fixed ---
(I2C BUS setting)
12.SYSTEM (SYS)
Fixed SYS01~SYS25
(System constant setting)
1-8 (No.YA053)
3.2.3 SETTINGS OF FACTORY SHIPMENT
3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION
Setting item Setting position Setting item Setting position
POWER Off INPUT TV
CHANNEL CH-02 CHANNEL CH-02
VOLUME 10 VOLUME 10
MUTING OFF
DISPLAY OFF
OFF TIMER OFF
THEATER PRO OFF
VIDEO STATUS DYNAMIC
ASPECT 4:3
A.H.S OFF [AV-27F485]
SOUND HYPER SURROND OFF [AV-27F475]
BBE ON
3.2.3.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE ADJUST (3) CLOCK / TIMERS
Setting item Setting position Setting item Setting position
TINT 0 SET CLOCK OFF
COLOR 0 ON / OFF TIMER OFF
PICTURE +8 WORLD CLOCK Refer to OPERATING
BRIGHT 0 INSTRUCTIONS
DETAIL +8 (4) INITIAL SETUP
COLOR TEMPERATURE HIGH
Setting item Setting position
NOISE MUTING ON
LANGUAGE ENG.
VSM ON
CLOSED CAPTION OFF
(2) SOUND ADJUST FRONT PANEL LOCK OFF
Setting item Setting position AUTO SHUT OFF OFF
BASS 0 XDS ID ON
TREBLE 0 VIDEO INPUT LABEL Refer to OPERATING
INSTRUCTIONS
BALANCE 0
V-CHIP OFF
MTS STEREO
SMART SOUND OFF
(No.YA053)1-9
3.3 REPLACEMENT OF CHIP COMPONENT
3.3.1 CAUTIONS
(1) Avoid heating for more than 3 seconds.
(2) Do not rub the electrodes and the resist parts of the pattern.
(3) When removing a chip part, melt the solder adequately.
(4) Do not reuse a chip part after removing it.
3.3.2 SOLDERING IRON
(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easily removing parts.
3.3.3 REPLACEMENT STEPS
1. How to remove Chip parts 2. How to install Chip parts
[Resistors, capacitors, etc.] [Resistors, capacitors, etc.]
(1) As shown in the figure, push the part with tweezers and (1) Apply solder to the pattern as indicated in the figure.
alternately melt the solder at each end.
(2) Grasp the chip part with tweezers and place it on the
solder. Then heat and melt the solder at both ends of the
chip part.
(2) Shift with the tweezers and remove the chip part.
[Transistors, diodes, variable resistors, etc.] [Transistors, diodes, variable resistors, etc.]
(1) Apply extra solder to each lead. (1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
solder.
SOLDER SOLDER (3) First solder lead A as indicated in the figure.
(2) As shown in the figure, push the part with tweezers and
alternately melt the solder at each lead. Shift and remove
the chip part.
A
B
C
(4) Then solder leads B and C.
A
NOTE : B
After removing the part, remove remaining solder from the
pattern. C
1-10 (No.YA053)
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT PREPARATION 4.3 MEASURING INSTRUMENT AND FIXTURES
(1) There are 2 ways of adjusting this TV : One is with the · DC voltmeter (or digital voltmeter)
REMOTE CONTROL UNIT and the other is the · Oscilloscope
conventional method using adjustment parts and · Frequency counter
components. · Signal generator (Pattern generator) [NTSC]
(2) The adjustment using the REMOTE CONTROL UNIT is · TV audio multiplex signal generator
made on the basis of the initial setting values. The · Remote control unit
setting values which adjust the screen to the optimum
condition can be different from the initial setting 4.4 ADJUSTMENT ITEMS
values. CHECK ITEM
(3) Make sure that connection is correctly made AC to AC · B1 POWER SUPPLY check
power source. · HIGH VOLTAGE HOLD DOWN check
(4) Turn on the power of the TV and measuring instruments for
warning up for at least 30 minutes before starting TUNER / IF CIRCUIT
adjustments. · IF VCO adjustment
(5) If the receive or input signal is not specified, use the most FOCUS
appropriate signal for adjustment. · FOCUS adjustment
(6) Never touch the parts (such as variable resistors,
DEFLECTION CIRCUIT
transformers and condensers) not shown in the adjustment
· V. SIZE / V. POSITION (4:3) adjustment
items of this service adjustment.
· V. SIZE / V. POSITION (16:9) adjustment
· H. POSITION / H. SIZE / SIDE PIN (4:3) / (16:9) adjustment
4.2 PRESET SETTING BEFORE ADJUSTMENTS
VIDEO CIRCUIT
Unless otherwise specified in the adjustment items, preset the
· WHITE BALANCE(High Light & Low Light) adjustment
following functions with the REMOTE CONTROL UNIT.
· SUB BRIGHT adjustment
Item Preset value · SUB CONTRAST adjustment
ASPECT 4:3 MTS CIRCUIT
· MTS INPUT LEVEL adjustment
VIDEO STATUS STANDARD
· MTS SEPARATION adjustment
TINT / COLOR / PICTURE / BRIGHT / DETAIL 0
COLOR TEMPERATURE LOW
VSM OFF
BASS / TREBLE / BALANCE 0
MTS STEREO
BBE OFF
A.H.S [AV-27F485] OFF
HYPER SORROUND [AV-27F475] OFF
(No.YA053)1-11
4.5 ADJUSTMENT LOCATIONS / WIRING
LED & POWER SW FRONT FRONT
PWB FRONT CONTROL PWB
POWER
POWER REMOCON
CN6007 CN6006
LED
B B
FRONT
TO SPEAKER MAIN PWB
SS CN007
DEG.
F901
5A
CN5006
AV SW
PWB CN004
MEMORY IC
IC702
PW
CN001
IC201
TUNER
HV
T111
E1
S1401
DOWN UP S1
CN005
C 5 1
1 : TP-E ( ) CRT EARTH UPPER : FOCUS
(BRAIDED ASS'Y) LOWER : SCREEN
TOP 2 : X-RAY2
3 : X-RAY1
CRT SOCKET PWB 4 : NC
(SOLDER SIDE) 5 : TP-91
TP-B
TP-R
CN3004 TP-E( )
CN3005
1-12 (No.YA053)
4.6 BASIC OPERATION OF SERVICE MODE
MAIN MENU SUB MENU
SERVICE MENU 7.LOW LIGHT
1.V/C(S) 2.DEF(D)
3.SOUND(A) 4.OTHERS(F)
5.3L Y/C(LYC)
7.LOW LIGHT 8.HIGH LIGHT
9.VCO
11.I2C BUS 12.SYSTEM(SYS)
SELECT BY
OPERATE BY EXIT BY EXIT
BRIGHT
1.V/C(S) 8.HIGH LIGHT
RF 4 : 3 STD LOW
S01 BRIGHT
2.DEF(D) 9.VCO
RF 4 : 3 STD LOW
TOO HIGH GOOD TOO LOW
SYNC: YES
D01 V FREQ AFC ON
FINE 0
3.SOUND(A) 11.I2C BUS [Fixed value]
A01 IN LEVEL I2C BUS ON
4.OTHERS(F) [Fixed value] 12.SYSTEM(SYS) [Fixed value]
SYS01 VIDEO IN
F01
5.3L Y/C(LYC) [Fixed value]
LYC01
(No.YA053)1-13
4.6.1 TOOL OF SERVICE MODE OPERATION
Operate the SERVICE MODE with the REMOTE CONTROL UNIT.
4.6.2 SERVICE MODE ITEMS
In general, basic setting (adjustments) items or verifications are performed in the SERVICE MODE.
1. V/C (S) This sets the setting values of the VIDEO circuit.
2. DEF (D) This sets the setting values of the DEFLECTION circuit.
3. SOUND (A) This sets the setting values of the AUDIO circuit.
4. OTHERS (F) This sets the setting values of the factory settings. [Do not adjust]
6. 3L Y/C(LYC) This sets the setting values of the 3 line YC separation control circuit. [Do not adjust]
7. LOW LIGHT This sets the setting values of the WHITE BALANCE (LOW LIGHT) control circuit.
8. HIGH LIGHT This sets the setting values of the WHITE BALANCE (HIGH LIGHT) control circuit.
9. VCO This sets the setting values of the VCO control circuit.
11. I2C BUS This sets the setting values of the I2C BUS control circuit. [Do not adjust]
12. SYSTEM(SYS) This sets the setting values of the system control circuit. [Do not adjust]
4.6.3 HOW TO ENTER THE SERVICE MODE
(1) Set to 0 minutes using the [SLEEP TIMER] key.
SERVICE MODE SELECT KEY
(2) Press the [VIDEO STATUS] key and [DISPLAY] key
simultaneously, then enter the SERVICE MODE. VCR/DVD
NOTE: switch
Before entering the SERVICE MODE, confirm that the setting TV/CATV POWER
of TV / CATV switch of the REMOTE CONTROL UNIT is at the switch
"TV" side and the setting of VCR / DVD switch is at the "VCR"
side. If the switches have not been properly set, you cannot DISPLAY
enter the SERVICE MODE. NUMBER
SLEEP
TIMER
4.6.4 HOW TO STORE OF SETTING VALUE
The setting value will be stored automatically when release the VIDEO
STATUS
REMOTE CONTROL UNIT keys ASPECT
CH+
4.6.5 HOW TO EXIT THE SERVICE MODE
VOL+
Press the [EXIT] key to exit the SERVICE MODE.
VOL-
EXIT
MENU CH-
RM-C1258G
1-14 (No.YA053)
4.6.6 SERVICE MODE SETTING
1. V/C, 2. DEF 7. LOW LIGHT
· Press [CH+] / [CH-] key The settings for LOW LIGHT is described in the WHITE
For scrolling up/down the adjustment item. BALANCE page of ADJUSTMENT PROCEDURE.
· Press [VOL+] / [VOL-] key NOTE:
For scrolling up/down the data values. The setting value will be stored automatically when release
NOTE: the REMOTE CONTROL UNIT keys.
The setting value will be stored automatically when release
the REMOTE CONTROL UNIT keys.
INPUT
SIGNAL
RF 4 : 3 STD LOW
SETTING ITEM SETTING VALUE
COLOR
ASPECT TEMPERATURE
VIDEO BRIGHT
STATUS
R CUTOFF G CUTOFF B CUTOFF
SETTING VALUE
SETTING ITEM
8. HIGH LIGHT
SETTING NO. SETTING VALUE
The settings for HIGH LIGHT is described in the WHITE
(1) INPUT SIGNAL BALANCE page of ADJUSTMENT PROCEDURE.
RF : Antenna input NOTE:
COMP : External (component) input The setting value will be stored automatically when release
EXT : External (S / Composite) input the REMOTE CONTROL UNIT keys.
(2) ASPECT
4:3 : 4:3 screen mode
16:9 : 16:9 screen mode
(3) VIDEO STATUS
STD : STANDARD
THEA : THEATER
(4) COLOR TEMPERATURE R DRIVE B DRIVE
SETTING VALUE
HIGH : White balance high mode
9. VCO
LOW : White balance low mode The setting for VCO is described in the IF VCO page of
ADJUSTMENT PROCEDURE.
3. SOUND (A)
VCO adjustment status (AFC level)
· Press [CH+] / [CH-] key
For scrolling up/down the adjustment item.
· Press [VOL+] / [VOL-] key
For scrolling up/down the data values.
NOTE:
TOO HIGH GOOD TOO LOW
The setting value will be stored automatically when release
the REMOTE CONTROL UNIT keys. SYNC INPUT SYNC: YES
AFC SW AFC OFF Setting value
FINE 0
A01 IN LEVEL
SETTING ITEM
SETTING NO. SETTING VALUE
(No.YA053)1-15
4.7 INITIAL SETTING VALUE OF SERVICE MODE
(1) Adjustment of the SERVICE MODE is made on the basis of the initial setting values ; however, the new setting values which set
the screen in its optimum condition may differ from the initial setting.
(2) Do not change the initial setting values of the setting items NOT LISTED IN ADJUSTMENT PROCEDURE.
(3) --- : This mark described in each table shows "Cannot adjust it."
4.7.1 [1.V/C(S)]
Initial setting value
AV-27F475/S
AV-27F485/S
Setting Variable
No. EXTERNAL EXTERNAL
item range RF
(S / COMPOSITE) (COMPONENT)
STANDARD THEATER STANDARD STANDARD
4:3 16:9 4:3 4:3 4:3
S01 BRIGHT 0 ~ 127 64 --- --- --- ---
S02 PICTURE 0 ~ 127 60 --- --- --- ---
S03 COLOR 0 ~ 127 44 --- --- --- 48
S04 TINT 0 ~ 127 52 --- --- --- 68
S05 DETAIL 0 ~ 63 35 --- --- 40 40
S06 BRIGHT+- -32 ~ +32 --- ±0 +1 +4 -3
S07 PICT+- -32 ~ +32 --- -8 -10 ±0 -12
S08 COLOR+- -32 ~ +32 --- ±0 -3 +1 ---
S09 TINT+- -32 ~ +32 --- ±0 -3 +9 ---
S10 DETAIL+- -32 ~ +32 --- --- ±0 --- ---
Initial setting value
AV-27F475/Z
AV-27F485/Z
Setting Variable
No. EXTERNAL EXTERNAL
item range RF
(S / COMPOSITE) (COMPONENT)
STANDARD THEATER STANDARD STANDARD
4:3 16:9 4:3 4:3 4:3
S01 BRIGHT 0 ~ 127 64 --- --- --- ---
S02 PICTURE 0 ~ 127 60 --- --- --- ---
S03 COLOR 0 ~ 127 39 --- --- --- 44
S04 TINT 0 ~ 127 57 --- --- --- 75
S05 DETAIL 0 ~ 63 35 --- --- 40 40
S06 BRIGHT+- -32 ~ +32 --- ±0 +1 -2 -2
S07 PICT+- -32 ~ +32 --- -8 -10 ±0 -5
S08 COLOR+- -32 ~ +32 --- ±0 -3 -3 ---
S09 TINT+- -32 ~ +32 --- ±0 -3 +14 ---
S10 DETAIL+- -32 ~ +32 --- --- ±0 --- ---
1-16 (No.YA053)
Initial setting value
AV-27F475/S
Setting Variable AV-27F485/S
No.
item range RF / EXTERNAL (S / COMPOSITE) EXTERNAL (COMPONENT)
STANDARD THEATER STANDARD THEATER
LOW HIGH LOW HIGH LOW HIGH LOW HIGH
S11 R CUT OFF 0 ~ 255 30 --- --- --- --- --- --- ---
S12 G CUT OFF 0 ~ 255 30 --- --- --- --- --- --- ---
S13 B CUT OFF 0 ~ 255 30 --- --- --- --- --- --- ---
S14 R DRIVE 0 ~ 127 64 --- --- --- --- --- --- ---
S15 B DRIVE 0 ~ 127 64 --- --- --- --- --- --- ---
S16 R CUT +- -128 ~ +127 --- ±0 ±0 ±0 -5 --- --- ---
S17 G CUT +- -128 ~ +127 --- ±0 ±0 ±0 +5 --- --- ---
S18 B CUT +- -128 ~ +127 --- ±0 ±0 ±0 -6 --- --- ---
S19 R DRV +- -128 ~ +127 --- +5 +13 +7 ±0 --- --- ---
S20 B DRV +- -128 ~ +127 --- +6 -25 -9 ±0 --- --- ---
S21 NTSC MAT 0~3 3 3 1 1 2 2 1 1
S22 BLACK ST 0~3 2 --- 2 --- --- --- --- ---
S23 DC REST 0~1 1 --- 1 --- --- --- --- ---
S24 DCRSW 0~1 1 --- 1 --- --- --- --- ---
Initial setting value
AV-27F475/Z
Setting Variable AV-27F485/Z
No.
item range RF / EXTERNAL (S / COMPOSITE) EXTERNAL (COMPONENT)
STANDARD THEATER STANDARD THEATER
LOW HIGH LOW HIGH LOW HIGH LOW HIGH
S11 R CUT OFF 0 ~ 255 30 --- --- --- --- --- --- ---
S12 G CUT OFF 0 ~ 255 30 --- --- --- --- --- --- ---
S13 B CUT OFF 0 ~ 255 30 --- --- --- --- --- --- ---
S14 R DRIVE 0 ~ 127 64 --- --- --- --- --- --- ---
S15 B DRIVE 0 ~ 127 64 --- --- --- --- --- --- ---
S16 R CUT +- -128 ~ +127 --- ±0 ±0 ±0 -5 --- --- ---
S17 G CUT +- -128 ~ +127 --- ±0 ±0 ±0 ±0 --- --- ---
S18 B CUT +- -128 ~ +127 --- ±0 ±0 ±0 -6 --- --- ---
S19 R DRV +- -128 ~ +127 --- +5 +13 +7 ±0 --- --- ---
S