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SERVICE MANUAL
COLOUR TELEVISION
5
2005
YA265
AV-28R57SK, AV-28R57SK/P,
AV-32R57SK, AV-32R57SK/P
BASIC CHASSIS
JW2
1 2 3
4 5 6
7 8 9
0 AV
MENU
P
TV OK
P
F.T/L
TV
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5 TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
COPYRIGHT © 2005 Victor Company of Japan, Limited No.YA265
2005/5
SPECIFICATION
Contents
Items
AV-28R57SK AV-32R57SK
Dimensions ( W × H × D ) 76.2 cm × 52.8 cm × 49.3 cm 86.4 cm × 58.7cm × 55.0 cm
Mass 39.0 kg 53.0 kg
TV RF System CCIR ( I )
Colour System PAL
NTSC3.58 / NTSC4.43 (Only EXT mode)
Stereo System NICAM ( I )
Receiving Frequency UHF 470 MHz - 862 MHz
Intermediate VIF 38.9 MHz ( I )
Frequency SIF 32.9 MHz (6.0 MHz :I)
Colour Sub PAL 4.43 MHz
Carrier Frequency NTSC 3.58 MHz / 4.43 MHz
Teletext System FLOF (Fastext level 2.5)
WST(Standard system)
Power Input AC 220 V - AC240 V, 50 Hz
Power Consumption 115 W (Standby : 2.7 W)
Picture Tube Visible size : 66 cm [measured diagonally] Visible size : 76cm [measured diagonally]
(H : 58.3 cm × V : 33.0 cm) (H : 67.4 cm × V : 38.4 cm)
High Voltage 31.0 kV (+1 kV / -1.5 kV) (at zero beam current)
Speaker MAIN 4 cm × 12 cm oval type × 2
CENTRE 4 c m × 12 cm oval type × 1
Audio Power Output MAIN 10 W + 10 W
CENTRE 10 W
Aerial Input Terminal 75 unbalanced, coaxial
EXT-1 / EXT-2 / EXT-3 (Input / Output) 21-pin Euro connector (SCART socket × 3)
EXT-4 Video 1V(p-p) positive, negative sync provided, 75 , RCA pin jack × 1
Audio 500 mV(rms) (-4 dBs), high impedance, RCA pin jack × 2
Audio Out (variable) 0 - 1000 V(rms), low impedance, RCA pin jack × 2
Surround Rear Terminal 7.5 W + 7.5 W, 8
Headphone Jack Stereo mini jack, Ø3.5mm × 1
Remote Control Unit RM-C1502 (AA/R6 dry cell battery × 2)
Woofer Unit Dimensions ( W × H × D ) 19.2 cm × 38.8 cm × 11.1 cm
Mass 2 kg
Speaker 13 cm round type × 1
Audio Power Output 18 W
Design & specifications are subject to change without notice.
This product is manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
1-2 (No.YA265)
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(1) The design of this product contains special hardware and many circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel
only.
(2) Alterations of the design or circuitry of the product should not be made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage
resulting therefrom.
(3) Many electrical and mechanical parts in the product have special safety-related characteristics. These characteristics are often
not evident from visual inspection nor can the protection afforded by them necessary be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are
identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the
schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the
same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock,
fire, or other hazards.
(4) The leads in the products are routed and dressed with ties, clamps, tubing's, barriers and the like to be separated from live parts,
high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is
required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to
normal, after re-assembling.
WARNING
(1) The equipment has been designed and manufactured to meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant safety standards.
(4) It is essential that safety critical components are replaced by approved parts.
(5) If mains voltage selector is provided, check setting for local voltage.
(No.YA265)1-3
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
DOLBY DIGITAL T-V LINK
This function can enjoy the surround sound of Dolby Digital When you have a T-V LINK compatible VCR connected to the
programmes. EXT-2 Terminal on the TV,it is easier to set up the VCR and to
ZOOM view videos.
This function can change the screen size according to the PICTURE MODE
picture aspect ratio. This function can adjust the picture settings automatically.
2.2 MAIN DIFFERENCE LIST
Item AV-28R57SK AV-28R57SK/P AV-32R57SK AV-32R57SK/P
MAIN PWB SJW-1914A-U2 SJW-1913A-U2
POWER & DEF PWB SJW-2014A-U2 LCA10364-11D SJW-2013A-U2 LCA10364-10D
(SJW-2014A-H3) (SJW-2013A-H3)
CRT SOCKET PWB SJW-3012A-U2 LCA90245-05B SJW-3011A-U2 LCA90245-04B
(SJW-3012A-H3) (SJW-3011A-H3)
FRONT CONTROL PWB SJW-8011A-U2 LCA90300-02A SJW-8011A-U2 LCA90300-02A
(SJW-8011A-H3) (SJW-8011A-H3)
SIDE CONTROL PWB SJW-8111A-U2 LCA90301-02B SJW-8111A-U2 LCA90301-02B
(SJW-8111A-H3) (SJW-8111A-H3)
AV JACK PWB SJW0J011A-U2 LCA90248-02C SJW0J011A-U2 LCA90248-02C
(SJW0J011A-H3) (SJW0J011A-H3)
2.3 HOW TO IDENTIFY MODELS
"PE" is added to the serial No. under at the Rating label.
AV-28R57SK
AV-32R57SK
PE
Indicated
1-4 (No.YA265)
2.4 21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2/EXT-3
Pin No. Signal designation Matching value EXT-1 EXT-2 EXT-3
1 AUDIO R output 500mV(rms) (Nominal),, Low impedance Used (TV OUT) Used (LINE OUT) Not used
2 AUDIO R input 500mV(rms) (Nominal),, High impedance Used (R1) Used (R2) Used (R3)
3 AUDIO L output 500mV(rms) (Nominal),, Low impedance Used (TV OUT) Used (LINE OUT) Not used
4 AUDIO GND Used Used Used
5 GND (B) Used Used Used
6 AUDIO L input 500mV(rms) (Nominal),, High impedance Used (L1) Used (L2) Used (L3)
7 B input 700mV(B-W), 75 Used Used Not used
FUNCTION SW Low : 0V-3V
8 Used Used Used
(SLOW SW) High : 8V-12V, High impedance
9 GND (G) Used Used Used
Used
10 SCL / T-V LINK Not used Not used
(SCL2 / TV-LINK)
11 G input 700mV(B-W), 75 Used Used Not used
12 SDA Not used Used (SDA2) Not used
13 GND (R) Used Used Used
14 GND (YS) Used Not used Not used
R : 700mV(B-W), 75
15 R / C input C : 300mV(P-P), 75 Used (R) Used (C2/R) Used (C3)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75 Used Used Not used
17 GND (VIDEO output) Used Used Used
18 GND (VIDEO input) Used Used Used
19 VIDEO output 1V(P-P) (Negative sync), 75 Used (TV OUT) Used (LINE OUT) Not used
20 VIDEO / Y input 1V(P-P) (Negative sync), 75 Used Used Used
21 COMMON GND Used Used Used
(P-P= Peak to Peak, B-W= Blanking to white peak)
[Pin assignment]
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
(No.YA265)1-5
2.5 TECHNINAL INFORMATION
2.5.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin Pin
Pin name I/O Function Pin name I/O Function
No. No.
1 VssP2 -- GND 65 SVM O Scan velocity modulation
2 VssC4 -- GND 66 FbiSo I H pulse (Flyback pulse)
3 V1.8C4 I 1.8V 67 Hout O H drive
4 V3.3A3 I 3.3V 68 VssComb -- GND
5 VrefP_Sdac I 3.3V 69 V5Comb I 5V for comb filter
6 VrefN_Sdac -- GND 70 Vin/R2/Pr I EXT-1 R-Y
7 VrefP_Sdac I 3.3V 71 Uin/B2/Pb I EXT-1 B-Y
8 VrefN_Sdac -- GND 72 Yin/G2/Y I EXT-1 Y
9 VrefP_Sdac I 3.3V 73 Ysync I Y for SyncSep
10 XtalIn I System clock(4MHz) 74 Yout O Y(for 73pin)
11 XtalOut O System clock(4MHz) 75 Uout/INSSW2 I Ys(for EXT-1 Y/R-Y/B-Y insertion)
12 VssA1 -- GND 76 Vout/Swo1 -- Not used
13 Vguard I CRT NECK protection 77 INSSW3 I Ys(for EXT-2 Y/R-Y/B-Y insertion)
14 DecDig -- 1.8V 78 R3/Pr I EXT-2 R-Y
15 V5P1 I 5V 79 G3/Y I EXT-2 Y
16 Phi2 -- Not used 80 B3/Pb I EXT-2 B-Y
17 Phi1 -- Not used 81 Gnd3 -- GND
18 Gnd1 -- GND 82 V5P3 I 5V
19 SecPll -- Not used 83 BCL I Auto Beam / contrast
20 Dec8G -- Not used 84 BLKIN I Black current input (For Auto white balance)
21 Ewd/Avl O Parabola wave 85 Rout O Red (for CRT)
22 Vdb O V. Drive(-) 86 Gout O Green (for CRT)
23 Vda O V. Drive(+)(For side pin) 87 Bout O Blue (for CRT)
24 Vif1 I IF 88 V3.3A1 I 3.3V
25 Vif2 I IF 89 RefAdN -- Not used
26 Vsc -- Not used 90 V3.3RefAdP I 3.3V
27 Iref -- Not used 91 RefAd -- Not used
28 GndIF -- GND 92 GndA -- GND
29 Sif1 I SIF 93 V1.8A I 1.8V
30 Sif2 I SIF 94 V3.3A2 I 3.3V
31 Agc O AGC 95 VssAD -- GND
32 EHT I HV change control 96 V1.8ADC I 1.8V
33 Ssif/RefIn/Avl/RefOut O L'/Other SW [L':H] 97 REMOCON I Remote control
34 AudoIn5L I Not used 98 P10/Int1 I AV_LINK control
35 AudioIn5R I Not used 99 P11/TO O AV_LINK control
36 AudOutSL O Audio (Left) 100 V1.8C2 I 1.8V
37 AudOutSR O Audio (Right) 101 VssC2 -- GND
38 DecsDem -- Not used 102 P04/I2SWs O I2C bus (WS) for DSP in DOLBY
39 QssO/AmO/AudeEm -- Not used 103 P03/I2SClk -- Not used
40 Gnd2 -- GND 104 P02/I2SDo2 O I2C bus (data) for audio in DOLBY
41 PllIf -- Not used 105 P01/I2SDo1 O Reset for DAC
42 SifAgc -- Not used 106 HP_DET I Head phone connection detection [Connect : L]
43 IfVo/FmRo/DvbO O Composite video detect 107 P13/T1 O Main power control [ON : H]
44 FmRo/DvbO -- Not used 108 SCL1 O I2C bus (clock) for AV SW, TUNER, VOLUME, DOLBY
45 V8AudioSwitches I 8V 109 SDA1 I/O I2C bus (data) for AV SW, TUNER, VOLUME, DOLBY
46 AgcSsif -- Not used 110 V3.3P I 3.3V
47 V5P2 I 5V 111 P20/TPwm O ROTATION
48 SVO/IfVo/Cvbsl -- Not used 112 P21/Pwm0 O S-CORRECTION CONTROL(PANORAMIC)
49 Audio4InL -- Not used 113 P22/Pwm1 O Audio muting [Muting : L]
50 Audio4InR -- Not used 114 P23/Pwm2 O Audio muting [Muting : H]
51 Y4/Cvbs4 I Composite video /Y 115 Protect I Protection detection for Low B short [Detect : H]
52 C4 I Chroma 116 P31/Adc1 O Lighting for POWER LED [ON : Soft RED]
53 Audio2InL -- Not used 117 V1.8C1 I 1.8V
54 Audio2InR -- Not used 118 DecV1V8 I 1.8V
55 Cvbs2/Y -- Not used 119 Key I Key scan front control
56 Audio3InL -- Not used 120 AGC I AGC
57 Audio3InR -- Not used 121 VssC1+P1 -- GND
58 Y3/Cvbs -- Not used 122 P24/PW3 -- Not used
59 C3 -- Not used 123 P25/PWM4 -- Not used
60 AudOutLsL -- Not used 124 V1.8C3 I 1.8V
61 AudOutLsR -- Not used 125 VssC3 -- GND
62 AudOutHpL -- Not used 126 Power DET I Main power detection [ON:H]
63 AudOutHpR -- Not used 127 P14/RX I/O I2C bus (data) for generally
64 CVBSO/PIP -- Not used 128 P15/TX O I2C bus (clock) for generally
1-6 (No.YA265)
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER 3.1.6 REMOVING THE SPEAKER
(1) Unplug the power cord. · Remove the REAR COVER.
(2) Remove the 13 screws [A], then withdraw the REAR · Remove the CHASSIS BASE.
COVER toward you. (1) Remove the 4 screws [E], then remove the MAIN
SPEAKER.
3.1.2 REMOVING THE SIDE CONTROL JACK ASS'Y (2) Remove the 4 screws [F], then remove the CENTRE
· Remove the REAR COVER. SPEAKER.
(1) Remove the 1 screw [B].
(2) Slightly shift the SIDE CONTROL JACK ASS'Y to rear side 3.1.7 CHECKING THE PW BOARD
and remove the 2 claws under the SIDE CONTROL JACK · To check the back side of the PW Board.
ASS'Y. (1) Pull out the CHASSIS BASE. (Refer to REMOVING THE
CHASSIS BASE).
3.1.3 REMOVING THE SIDE CONTROL PWB (2) Erect the CHASSIS BASE vertically with the HVT side
· Remove the REAR COVER. facing up so that you can easily check the back side of the
· Remove the SIDE CONTROL JACK ASSY. PW board.
(1) Remove the 2 screws [C]. CAUTION:
(2) Remove the 2 claws from back side of the SIDE CONTRL · When erecting the CHASSIS BASE, be careful so that there
JACK ASS'Y, then pull out the SIDE CONTROL PWB. will be no contacting with other PW Board.
· Before turning on power, make sure that the wire connector
3.1.4 REMOVING THE CHASSIS BASE is properly connected.
· Remove the REAR COVER. · When conducting a check with power supplied, be sure to
(1) Slightly raise the both sides of the chassis by hand and confirm that the CRT EARTH WIRE (BRAIDED ASS'Y) is
remove the 2 claws under the both sides of the CHASSI S connected to the CRT SOCKET PWB.
BASE from the front cabinet.
(2) Withdraw the CHASSIS backward. 3.1.8 WIRE CLAMPING AND CABLE TYING
(If necessary, take off the wire clamp, connectors etc.) (1) Be sure to clamp the wire.
(2) Never remove the cable tie used for tying the wires
3.1.5 REMOVING THE AV TERMINAL BOARD together. Should it be inadvertently removed, be sure to tie
· Remove the REAR COVER. the wires with a new cable tie.
(1) Remove the 6 screws [D].
(2) Remove the 2 claws under the CHASSIS, then remove the
AV TERMINAL BOARD.
(No.YA265)1-7
E
MAIN SPEAKER
CRT SOCKET PWB
FRONT CONTROL PWB
DOLBY PWB
CONTROL BASE AV JACK PWB
POWER & DEF PWB
Claw
CHASSIS BASE
F
B CENTRE SPEAKER
Claw AV TERMINAL
C BOARD
MAIN PWB
Claw SIDE CONTROL PWB D
SIDE CONTROL BASE
Claw
POWER CORD
REAR COVER
A
Fig.1
1-8 (No.YA265)
3.2 MEMORY IC REPLACEMENT
· This model uses the memory IC.
· This memory IC stores data for proper operation of the video and drive circuits.
· When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the
SERVICE MENU
AC outlet.
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. VPS
2. Replace the memory IC 7. SHIPPING (OFF)
Be sure to use the memory IC written with the initial setting
values. MODEL=JW2 DOLBY (XXXXX)
Fig.1
3. Power on
Connect the power plug to the AC outlet and switch on the
Address Do not adjust
power.
EEP EDIT (LAST MEMORY)
4. System constant check and setting TOP ADDRESS=000H
* It must not adjust without signal.
00 01 02 03 04 05 06 07
(1) Press the [INFORMATION] key and the [MUTING] key 8F 00 FE FF FF FF FF FF
of the REMOTE CONTROL UNIT simultaneously. 08 09 0A 0B 0C 0D 0E 0F
(2) The SERVICE MODE screen of Fig. 1 will be displayed. FF 01 BB FC 1F F9 FF FF
(3) While the SERVICE MODE is displayed, press the
[INFORMATION] key and [MUTING] key simultaneously,
and the SYSTEM CONSTANT SET screen of Fig. 2 will
be displayed. Setting data
(4) Refer to the below table, and check the setting items. Fig.2
Where these differ, select the addres with the
[FUNCTION / ] key and adjust it with the
[FUNCTION / ] keys. (The letter of the selected item
is displayed in yellow.) MUTING
(5) Setup will become effective if the main power is shut off.
1 2 3
Setting data 4 5 6
Address
AV-28R57SK AV-32R57SK 7 8 9
00 8E 9E 0 AV
01 00 00
INFORMATION
MENU
P
TV OK MENU
5. Receiving channel setting FUNCTION
Refer to the OPERATING INSTRUCTIONS and set the /
receive channels (Channels Preset) as described. FUNCTION
P
/
F.T/L
6. User settings
Check the user setting items according to the given in page
later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
TV
7. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is
necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for
setting.
(No.YA265)1-9
3.2.2 SETTINGS OF FACTORY SHIPMENT
3.2.2.1 BUTTON OPERATION 3.2.2.2 REMOTE CONTROL DIRECT OPERATION
Setting item Setting position Setting item Setting position
POWER Off CHANNEL PR1
CHANNEL PR1 VOLUME 10
VOLUME 10 ZOOM AUTO
SORROUND OFF
3.2.2.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE (3) FEATURES
Setting item Setting position Setting item Setting position
PICTURE MODE BRIGHT SLEEP TIMER OFF
BLUE BACK ON
COLOUR TEMP. COOL CHILD LOCK OFF
FEATURES (4) SET UP
AUTO VNR AUTO Setting item Setting position
COLOUR SYSTEM TV According to preset CH AUTO PROGRAM TV channel automatically set
EXT AUTO EDIT/MANUAL PRESET CH only
4:3 AUTO ASPECT PANORAMIC The others : BLANK
LANGUAGE ENGLISH
(2) SOUND
DECODER (EXT-2) OFF
Setting item Setting position
EXT SETTING ID BLANK
STEREO / I·II Stereo sound
S-IN BLANK
BASS Centre
DUBBING EXT-1 EXT-2
TREBLE Centre
BALANCE Centre
SUROUND MODE
DOLBY TV SPEAKER L / C / R
PRO LOGIC II LEFT MAX
CENTRE MAX
RIGHT MAX
LS MAX
RS MAX
WOOFER MAX
DISTANCE 0 METERS
(5) VSM PRESET TABLE
Setting value
Variable
Item PICTURE MODE COLOUR TEMP.
range
BRIGHT STANDARD SOFT COOL NORMAL WARM
1.BRIGHT -16 - +16 0 0 0 --- --- ---
2.CONT -16 - +16 +12 +10 +2 --- --- ---
3.COLOUR -16 - +16 +6 0 -2 --- --- ---
4.SHARP -16 - +16 0 0 -2 --- --- ---
5.HUE -16 - +16 0 0 0 --- --- ---
1.R DRIVE -63 - +63 --- --- --- -7 0 +5
2.G DRIVE -63 - +63 --- --- --- 0 0 0
3.B DRIVE -63 - +63 --- --- --- +7 0 -5
1-10 (No.YA265)
3.2.3 SERVICE MODE SETING ITEMS
Setting item Setting value Setting item Setting value
1. IF 1. VCO 4. DEF 1. V-SHIFT
2. DELAY POINT 2. V-SLOPE
3. V-SIZE
4. H-CENT
5. H-SIZE
6. TRAPEZ
7. EW-PIN
8. COR-UP
9. COR-LO
10. ANGLE
11. BOW
12. V-S.CR
13. V-LIN
2. V/C 1. SCREEN 5. VSM PRESET BRIGHT/SOFT/STANDARD
2. CUTOFF R / G 1. BRIGHT
3. WDR R / G / B 2. CONT
4. BRIGHT 3. COLOUR
5. CONT. 4. SHARP
6. COLOUR 5. HUE
7. HUE
8. BLACK OFFSET B-Y COOL/WARM/NORMAL
9. SHARP 1. R DRIVE
10. Y DELAY 2. G DRIVE
11. TINT DVD 3. B DRIVE
12. RGB BLK
3. AUDIO 1. DCX0 ADJ. 6. VPS VPS
[Do not adjust] 2. NICAM LOWER ERRLIM [Do not adjust] PDC
3. NICAM UPPER ERRLIM WSS
4. A2 ID THR SN
7.SHIPPING (OFF) ---
[Do not adjust]
(No.YA265)1-11
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 solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
(1) Apply extra solder to each lead.
solder.
(3) First solder lead A as indicated in the figure.
SOLDER SOLDER
A
(2) As shown in the figure, push the part with tweezers and
B
alternately melt the solder at each lead. Shift and remove
the chip part.
C
(4) Then solder leads B and C.
A
B
NOTE :
After removing the part, remove remaining solder from the C
pattern.
1-12 (No.YA265)
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 (1) DC voltmeter (or digital voltmeter)
REMOTE CONTROL UNIT and the other is the (2) Oscilloscope
conventional method using adjustment parts and (3) Signal generator (Pattern generator : PAL / NTSC)
components. (4) Remote control unit
(2) The adjustment using the REMOTE CONTROL UNIT is
made on the basis of the initial setting values. The 4.4 ADJUSTMENT ITEMS
setting values which adjust the screen to the optimum CHECK ITEM
condition can be different from the initial setting · B1 VOLTAGE check
values. · HIGH VOLTAGE check
(3) Make sure that connection is correctly made AC to AC · IF VCO check
power source.
(4) Turn on the power of the TV and measuring instruments for FOCUS
warming up for at least 30 minutes before starting · FOCUS adjustment
adjustments. DEFLECTION CIRCUIT
(5) If the receive or input signal is not specified, use the most · V. POSITION adjustment
appropriate signal for adjustment. · V. SIZE adjustment
(6) Never touch the parts (such as variable resistors, · H. POSITION adjustment
transformers and condensers) not shown in the adjustment · H. SIZE adjustment
items of this service adjustment. · SIDE-PIN adjustment
· TRAPEZIUM adjustment
4.2 PRESET SETTING BEFORE ADJUSTMENT · CORNER adjustment
Unless otherwise specified in the adjustment items, preset the · ANGLE adjustment
following functions with the REMOTE CONTROL UNIT. · BOW adjustment
· V. S-SHAPE CORRECTION & V.LINEARITY adjustment
Item Preset value
VIDEO CIRCUIT
PICTURE MODE STANDARD · WHITE BALANCE adjustment
COLOUR TEMP. NORMAL · SUB BRIGHT adjustment
· SUB CONTRAST adjustment
BASS / TREBLE / BALANCE Centre
· SUB COLOUR adjustment
ZOOM FULL · SUB TINT adjustment
SLEEP TIMER OFF VSM PRESET SETTING
· VSM PRESET setting
(No.YA265)1-13
4.5 ADJUSTMENT LOCATIONS
SIDE CONTROL PWB FRONT CONTROL PWB
FRONT
PW
W
TOP B
FRONT
K
POWER CORD
F
POWER & DEF PWB DEG
S
W
MAIN SPEAKER(R) DEG COIL
FRONT
MAIN SPEAKER(L)
MAIN PWB
R L K B
SW WOOFER UNIT CN004
S CENTRE SPEAKER CN008
SC
TUNER
CN002 CN003
DEF. YOKE
HV
F
AV JACK HVT
PWB
X
1
DOLBY 5
CN001
PWB CN009
FOCUS
SCREEN 1 : TP-91(B1)
2 : NC
3 : NC
4 : NC
5 : TP-E ( )
CRT SOCKET PWB (SOLDER SIDE)
TP-47R TP-E
TP-47B
TP-47G
CN3008 CN3009
1-14 (No.YA265)
4.6 TOOL OF SERVICE MODE OPERATION
Operate the SERVICE MODE with the REMOTE CONTROL UNIT.
4.6.1 SERVICE MODE ITEMS
With the SERVICE MODE, various adjustment can be made, and they are broadly classified in the following items of settings.
1.IF This mode adjusts the IF circuit.
2.V/C This mode adjusts the VIDEO circuit
3.AUDIO This mode adjusts the AUDIO circuit. [Do no adjust]
4.DEF This mode adjusts the DEFLECTION circuit.
5.VSM PRESET This mode sets the VSM (Video Status Memory) data.
6.VPS This mode shows the monitor of the VPS, PDC, WSS and SN. [Do not adjust]
7.SHIPPING (OFF) This mode initialize the data for factory shipment. [Do no adjust]
4.6.2 BASIC OPERATION IN SERVICE MODE
4.6.2.1 HOW TO ENTER THE SERVICE MODE 4.6.2.2 SELECTION OF SUB MENU SCREEN
Press the [INFORMATION] key and [MUTING] key of the Press one of the CHANNEL number key with the remote control
REMOTE CONTROL UNIT simultaneously. Then SERVICE unit, and select the SUB MENU SCREEN from SERVICE
MODE screen will be displayed as shown figure. MODE.
SERVICE MENU 4.6.2.3 SETTING METHOD
1. IF 2. V/C 1.IF
3. AUDIO 4. DEF
5. VSM PRESET 6. VPS [1. VCO] : It must not adjust without signal
7. SHIPPING(OFF) (1) [1] key
Select 1.IF.
(2) [1] key
Select 1.VCO(CW).
Check the arrow position between the ABOVE REF. and
Fig.1
BELOW REF.
(3) [INFORMATION] key
Return to the SERVICE MODE main manu screen.
MUTING 2.V/C, 4.DEF and 5.VSM PRESET.
(1) [2], [4] and [5]key
1 2 3 Select one from 2.V/C, 4.DEF, 5.VSM PRESET.
4 5 6
(2) [FUNCTION / ] key
Select setting items.
7 8 9 (3) [FUNCTION / ] key
0 Set the setting values of the setting items.
AV
(4) [MENU] key
Memorize the setting value.
INFORMATION (Before storing the setting values in memory, do not
TV
P
MENU
OK MENU press the CH, TV, POWER ON / OFF key. if you do, the
FUNCTION values will not be stored in memory.)
/ (5) [INFORMATION] key
FUNCTION Return to the SERVICE MODE main manu screen.
/
P
3.AUDIO, 6.VPS and 7.SHIPPING (OFF)
F.T/L
It is not requirement to adjustment.
4.6.2.4 MEMORIZE THE ADJUSTMENT DATA
When adjustment is completed, press the [MENU] key to
memorize the adjustment value. If not to do it, adjustment data is
not memorized to the memory IC. And if exit the adjustment
TV mode before memorize the data, the adjustment value which you
change is canceled.
Fig.2 4.6.2.5 RELEASE OF SERVICE MODE
After completing the setting, return to the SERVICE MODE, then
again press the [INFORMATION] key.
(No.YA265)1-15
4.6.3 SERVICE MODE FLOW CHART
SERVICE MENU
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. VPS
7. SHIPPING (OFF)
4. DEF 1.IF 1.VCO
IF SERVICE MENU VCO (CW) ** , ** MHz
1. V-SHIFT DEF FULL 50Hz TOO HIGH
2. V-SLOPE 1. VCO
ABOVE REFERENCE
3. V-SIZE 2. DELAY POINT
1. V-SHIFT JUST REFERENCE
4. H-CENT BELOW REFERENCE
5. H-SIZE TOO LOW
6. TRAPEZ
7. EW-PIN
8. COR-UP
9. COR-LO
2.DELAY POINT
10. ANGLE
11. BOW
12.V-S.CR DELAY POINT
13.V-LIN
AGC TAKE OVER **
5. VSM PRESET
VSM PRESET BRIGHT
PICTURE MODE
BRIGHT
1.BRIGHT
STANDARD Do not adjust
SOFT
2. V/C
1. BRIGHT
2. CONT 1. SCREEN
3. COLOUR V/C AUTO PAL 2. CUTOFF R/G
4. SHARP 3. WDR R/G/B
5. HUE 1. SCREEN HBC 4. BRIGHT
WBC 5. CONT.
COLOUR TEMP 6. COLOUR
Do not adjust 7. HUE
COOL
NORMAL 8. BLACK OFFSET B-Y
6.VPS 9. SHARP
WARM
10. Y DELAY
1. R DRIVE 11. TINT DVD
2. G DRIVE 12. RGB BLK
VPS = H(---)
3. B DRIVE
PDC 8/30/1 = H
H
WSS = H
SN = Do not adjust
3. AUDIO
AUDIO
1. DCX0 ADJ. =
NOT NICAM 1. DCX0 ADJ.
2. NICAM LOWER ERRLIM
3. NICAM UPPER ERRLIM
4. A2 ID THR
1-16 (No.YA265)
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
displays on the screen in its optimum condition may differ from the initial setting value.
(2) Do not change the initial setting values of the items not listed in "ADJUSTMENT PROCEDURE".
(3) "---" is impossible to adjust or not requirement to adjustment.
4.7.1 [2. V/C]
Variable Setting value
Setting item
range PAL NTSC NTSC4.43 RGB
2. CUT OFF RED -63 - +63 0 0 0 0
GREEN -63 - +63 0 0 0 0
3. WDR RED -63 - +63 0 0 0 -5
GREEN -63 - +63 0 0 0 0
BLUE -63 - +63 0 0 0 -5
4. BRIGHT -63 - +63 0 0 0 0
5. CONT. -63 - +63 -10 -10 -10 0
6. COLOUR -63 - +63 0 0 0 -3
7. HUE -63 - +63 --- 0 0 ---
8. BLACK OFFSET B-Y 0-3 --- --- --- ---
Setting value
Variable
Setting item PAL NTSC NTSC4.43
range RGB
RF VIDEO RF VIDEO RF VIDEO
9. SHARP -63 - +63 +5 +5 +5 +5 +5 +5 +5
Setting value
Variable
Setting item PAL NTSC NTSC4.43
range RGB
RF VIDEO S RF VIDEO S RF VIDEO S
10. Y DELAY 0 - +15 +5 +3 +5 +5 +3 +5 +5 +3 +5 ---
Variable Setting value
Setting item
range PAL NTSC NTSC4.43 RGB
11. TINT DVD -63 - +63 -11 -11 -11 -11
12. RGB BLK --- 0 0 0 0
4.7.2 [3. AUDIO] [Do not adjust]
Variable
Setting item Setting value
range
1. DCXO ADJ. --- F0
2. NICAM LOWER ERRLIM 00H - FFH 6F
3. NICAM UPPER ERRLIM 00H - FFH B0
4. A2 ID THR 00H - FFH 00
(No.YA265)1-17
4.7.3 [4. DEF] [AV-28R57SK]
Initial setting value
Varia