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AV-29L31

SERVICE MANUAL
COLOR TELEVISION
BASIC CHASSIS

CH

AV-29L31/M
DISPLAY

POWER

MENU

CHANNEL

VOLUME

CLOSED CAPTION

MUTING

TV/VIDEO

1 4

2 5 8 0

3 6 9
100

PICTURE MODE

7

CHANNEL SCAN RETURN

ECO SENSOR

OFF TIMER

RM-C248 REMOTE CONTROL UNIT

RM-C248-2C

CONTENTS
a SPECIFICATIONS ....................................................................................................................................2 a SAFETY PRECAUTIONS ........................................................................................................................3 a FEATURES ..............................................................................................................................................4 a FUNCTIONS .............................................................................................................................................5 a SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................6 OPERATING INSTRUCTIONS (APPENDIX) ....................................................................................... 1-1 a SERVICE ADJUSTMENTS ....................................................................................................................14 STANDARD CIRCUIT DIAGRAM (APPENDIX) .................................................................................. 2-1 a PARTS LIST ...........................................................................................................................................33
No. 51970 Jan. 2002

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

AV-29L31

SPECIFICATIONS
Items
Dimensions (W H D) Mass TV RF System Color System Stereo System Receiving Frequency VHF (VL) VHF (VH) UHF CATV TV Mode VIDEO Mode 73.2cm 58.8cm 51.8cm 47kg CCIR(M) NTSC3.58 NTSC3.58 BTSC (Multi channel Sound) 54MHz 88MHz (02 06) 174MHz 216MHz (07 13) 470MHz 806MHz (14 69) Low Band High Band Mid Band Super Band Hyper Band Ultra Band Sub Mid Band TV/CATV Total Channel Intermediate Frequency Aerial Input Terminal Power Input Power Consumption Picture Tube High Voltage Speaker Audio Output Video / Audio Input (1 / 2 / 3) VIF Carrier SIF Carrier 45.75MHz 41.25MHz (4.5MHz) NTSC (3.58MHz) 75 Unbalanced AC110 240V, 50/60Hz 172W (Max.) / 108W (Avg.) Visible size : 68cm measured diagonally 32kV + 1/1.5kV (at cut-off in service mode) 5cm 12cm 7W + 7W Video(1,3) : 1Vp-p, 75 (RCA pin jack) Audio(1,2,3) : 500mVrms ( -4dBs ), High Impedance (RCA pin jack) Component Input ( Input 2 ) Y CB/CR Video/Audio Output : 1Vp-p positive (negative sync provided, when terminated with 75) : 0.7Vp-p 75 Oval type 2 (02 06, A-8) by (02 06 & 01) (07 13) by (07 13) (A I) by (14 22) (J W) by (23 36) (W+11 W+23) by (47 59) (W+29 W+84) by (65 125) (A8, A7 A1) by (01, 93 99) 180 Channel -- (54MHz 804MHz) --

Contents

Color Sub Carrier Frequency

1Vp-p, 75 (RCA pin jack) 500mVrms(-4dBs) Low impedance (400Hz when modulated 100%) (RCA pin jack)

Headphone Jack Remote Control Unit

Stereo mini jack (3.5) RM-C248-2C (Battery size: AA/R06/UM-3 2)

Design & specifications are subject to change without notice.

2

No. 51970

AV-29L31

SAFETY PRECAUTIONS
1. The design of this product contains special hardware, 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 products 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 products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily 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 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. Don't short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the ISO) side GND and EARTH : ( ) side GND. LATED (NEUTRAL) : ( Don't short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time with a measuring apparatus (oscilloscope etc.). If above note will not be kept, a fuse or any parts will be broken. 5. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY). 6. The high voltage applied to the picture tube must conform with that 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. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product. 7. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k 2W resistor to the anode button. 8. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components. 9. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/ audio input and output terminals, Control knobs, metal cabinet, screw heads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade. (2) Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.). G Alternate Check Method Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500 10W resistor paralleled by a 0.15F AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER (HAVING 1000/V, OR MORE SENSITIVITY)

0.15F AC-TYPE PLACE THIS PROBE ON EACH EXPOSED METAL PART

1500 10W GOOD EARTH GROUND

No. 51970

3

AV-29L31

FEATURES
s s s s s s New chassis design enables use of an interactive on-screen control. Pure flat CRT produces fine textured picture in every detail. Wide range voltage (110V ~ 240V) for AC power input. With AUDIO/VIDEO/COMPONENT input terminals. I 2 C bus control utilizes single chip ICs. By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically. s Built-in DIGITAL ECO MODE (ECONOMY, ECOLOGY). In accordance with the brightness in a room, the brightness and/or contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye. s Built-in OFF TIMER & RETURN +.

4

No. 51970

AV-29L31

FUNCTIONS
a FRONT PANEL

V

L/MONO

R

IN (VIDEO-3)

a REAR PANEL
VIDEO-1 INPUT COMPONENT (VIDEO-2) INPUT

OUTPUT

V

Y /V

V

L / MONO C B

L / MONO L

R

CR

R

R

a REMOTE CONTROL UNIT [RM-C248-2C]

DISPLAY

POWER

MENU

CHANNEL

VOLUME

CLOSED CAPTION

MUTING

TV/VIDEO

1 4

2 5 8 0

3 6 9
100

PICTURE MODE

7

CHANNEL SCAN RETURN

ECO SENSOR

OFF TIMER

RM-C248 REMOTE CONTROL UNIT

No. 51970

5

AV-29L31

SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the AC power cord. 2. Remove the 16 screws marked as shown in Fig.1. 3. Withdraw the Rear cover toward you. [CAUTION] When reinstalling the rear cover, carefully push it inward after inserting the Main PWB into the rear cover groove.

CHECKING THE MAIN PW BOARD
1. To check the back side of the Main PWB. 1) Pull out the chassis. (Refer to REMOVING THE CHASSIS). 2) Erect the chassis vertically so that you can easily check the back side of the Main PWB. [CAUTION] When erecting the chassis, be careful so that there will be no contacting with other PW Board. Before turning on power, make sure that the CRT earth wire and other connectors are properly connected. When repairing, connect the Deg. coil to the DEG. connector on the Main PWB.



REMOVING THE CHASSIS (CHASSIS BASE AND CONTROL BASE)



After removing the rear cover. the chassis by hand and remove the 1. Slightly raise the both sides of
2 claws marked i under the chassis from the front cabinet as shown in Fig.1. 2. Withdraw the chassis backward. (If necessary, take off the wire clamp, connector's etc.)

WIRE CLAMPING AND CABLE TYING
1. Be sure to clamp the wire. 2. Never remove the cable tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a new cable tie.

* When conducting a check with power supplied, be sure to confirm
that the CRT earth wire is connected to the CRT SOCKET PWB and the Main PWB.

REMOVING THE AV TERMINAL BOARD
the rear cover. After removingscrews marked as shown in Fig.1. 1. Remove the 4 2. When you pull out the AV Terminal board in the direction of arrow marked as shown in Fig.1, it can be removed.

REMOVING THE CONTROL BASE
the rear the chassis. After removing down thecover andmaked as shown in Fig. 2 and 1. While pushing 2 claws pull out the Control base in the direction of arrow maked as shown in Fig. 2, the control base can be removed. (If necessary, take off the wire, connector's etc.)

REMOVING THE SPEAKER

the rear cover. After removingscrews marked and 2 screws maked as shown 1. Remove the 4 in Fig.1. 2. Withdraw the speaker backward. 3. Follow the same steps when removing the other hand speaker.

6

No. 51970

AV-29L31

[FRONT SIDE] PICTURE TUBE CONTROL BASE E

FRONT CABINET CHASSIS BASE H

F

Fig.2

G (4) SPEAKER H CRT SOCKET PWB FRONT CONTROL PWB (2/2)

MAIN PWB H FRONT CONTROL PWB (1/2) Fig.2 G (4) SPEAKER H CHASSIS BASE D CONTROL BASE

CLAW B
AV TERMINAL BOARD

CLAW B
C (4)

REAR COVER A (16)

Fig.1

No. 51970

7

AV-29L31

REMOVING THE CRT
* Replacement of the CRT should be performed by 2 or more persons. rear cover, After removing thechange tablechassis etc., the CRT change table 1. Putting the CRT on soft cloth, should also be covered with such soft cloth (shown in Fig. 3). 2. While keeping the surface of CRT down, mount the TV set on the CRT change table balanced will as shown in Fig. 4. 3. Remove 4 screws marked by arrows with a box type screwdriver as shown in Fig. 4. Since the cabinet will drop when screws have been removed, be sure to support the cabinet with hands. 4. After 4 screws have been removed, put the cabinet slowly on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 5. The CRT should be assembled according to the opposite sequence of its dismounting steps.
APPROX. 35cm CLOTH CRT CHANGE TABLE



Fig. 3

CRT

* The CRT change table should preferably be smaller that the CRT surface, and its height be about 35cm.
CRT CHANGE TABLE BOX TYPE SCREW DRIVER

Fig. 4

CRT

COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION
replacement of the CRT and HV repair Subsequent tocap, etc. by dismounting them, betransformer orsilicon of the anode sure to coat grease for electrical insulation as shown in Fig. 6. 1. Wipe around the anode button with clean and dry cloth. (Fig. 6) 2. Coat silicon grease on the section around the anode button. At this time, take care so that any silicon greases does not sticks to the anode button. (Fig. 7) Silicon grease product No. KS - 650N

CABINET

CRT CHANGE TABLE

Fig. 5

CRT

Anode button

Approx. 20mm (Do not coat grease on this section

Silicon grease should be coated by 5mm or more from the outside diameter of anode cap.

Silicon grease coating

Anode button (No sticking of silicon grease)

Coating position of silicon grease Anode cap

Fig. 6

Fig. 7

8

No. 51970

AV-29L31

REPLACEMENT OF MEMORY IC
1. MEMORY IC
This TV uses the following memory IC. Memory IC: IC1702 on MAIN PW Board The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in "PRINTED WIRING BOARD PARTS LIST". For its mounting location, refer to "ADJUSTMENT LOCATIONS". (6) User setting Check the user setting values in Table 2, and if setting value is different, set the correct value. For setting, refer to the OPERATING INSTRUCTIONS. (7) Setting of SERVICE MENU Verify the setting for each setting item in the SERVICE MENU.(See Table 3.) If readjustment is necessary, perform adjustment referring to "SERVICE ADJUSTMENTS".

2. PROCEDURE FOR REPLACING MEMORY IC
(1) Power off Switch the power off and unplug the power cord from the wall outlet. (2) Replacing the memory IC Replace the memory IC with new one. Be sure to use the memory IC written with the initial data values. (3) Power on Plug the power cord into the wall outlet and switch the power on. (4) Check and setting of SYSTEM CONSTANT SET 1) Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed.(See Fig.1.) 2) In the SERVICE MENU, press the DISPLAY key and PICTURE MODE key simultaneously. Then, the SYSTEM CONSTANT SET screen will be displayed.(See Fig.2.) 3) Check whether the setting values of the SYSTEM CONSTANT SET are the same as those indicated in Table1. If the value is different, select the setting item with the MENU &/^ key, and set the correct value with the MENU /+key. 4) Press the DISPLAY key twice to return to the normal screen. (5) Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the receive channels (channels preset). NAME OF REMOTE CONTROL KEYS

SERVICE MENU
SERVICE MENU 1. IF 2. VC 3. DEF 4. VSM PRESET 5. PRESET 6. AUDIO 7. PLUG & PLAY (OFF) 1-7 : SELECT DISPLAY : EXIT

******* **** ***** ***** **** **** *** ***
Fig. 1

SYSTEM CONSTANT-
SYSTEM CONSTANT SET 1 COLOR SYSTEM COMB TILT SUPER BASS NTSC NO NO NO

89 : SEL

- + : OPE

DISP : EXIT

SYSTEM CONSTANT-
SYSTEM CONSTANT SET 2

DISPLAY

POWER

DISPLAY MENU
MENU

MENU MENU MENU
CHANNEL VOLUME

+

MSP B / B SOUND TUNER COLOR AUTO

YES NO MU NO

89 : SEL

- + : OPE

DISP : EXIT

CLOSED CAPTION

MUTING

TV/VIDEO

1 4

2 5 8 0

3 6 9
100

SYSTEM CONSTANT-
SYSTEM CONSTANT SET 3 LOCK LONG WAIT SHORT WAIT : 001 : 001

PICTURE MODE

PICTURE MODE

7

CHANNEL SCAN RETURN

ECO SENSOR

OFF TIMER

89 : SEL

- + : OPE

DISP : EXIT

Fig. 2

No. 51970

9

AV-29L31

SETTING OF SYSTEM CONSTANT SET
Setting item COLOR SYSTEM COMB TILT SUPER BASS MSP B/B SOUND TUNER COLOR AUTO LOCK LONG WAIT SHORT WAIT Setting content NTSC YES YES YES YES YES MU YES 000 000 TRIPLE NO NO NO NO NO MA NO 255 255 Setting value NTSC YES YES NO YES NO MU NO 001 001

Table 1

10

No. 51970

AV-29L31

USER SETTING VALUES
Setting item SUB POWER CHANNEL POSITION CHANNEL PRESET VOLUME TV/VIDEO VNR COMPRESS (16:9) AUTO SHUTOFF CHILD LOCK BLUE BACK VIDEO-2 SET LANGUAGE MONO SURROUND AI VOLUME ON SCREEN DISPLAY COLOR SYSTEM SOUND SYSTEM PICTURE MODE-VSM OFF TIMER ECO SENSOR PICTURE TILT BASS TREBLE BALANCE CLOSED CAPTION ON CH-02 REFER TO OPERATING INSTRUCTIONS 15 2 TV OFF OFF OFF OFF ON VIDEO ENG OFF ON POSITION INDICATION NTSC M BRIGHT 00 OFF 00 CENTER CENTER CENTER OFF (CC1/T1) Table 2 Setting value

No. 51970

11

AV-29L31

SERVICE MENU SETTING ITEMS
Service menu 1. IF 1. VCO 2. DELAY POINT Setting item Service menu 5. PRESET Do not adjust 1. CB 2. ACL 3. MUS 2. VC 1. CUTOFF(R/G) 2. DRIVE(R/G/B) 3. BRIGHT 4. PICTURE 5. COLOR 6. TINT 7. DETAIL 8. YDELAY Do not adjust 4. MAT 5. FCO 6. BPS 7. IFLH 8. VID 9. STM 10. AFCW 11. VSW 12. FFI 3. DEF 1. VER. SLOPE 2. VER. HEIGHT 3. VER. POSITION 4. VER. SCURVE 5. HOR. POSITION 6. HOR. WIDTH 7. EW-PIN 8. EW-TRAPEZ 9. UP CORNER 10. DW CORNER 11. HOR. PARALL 12. HOR. BOW 13. V. ZOOM 7. PLUG & PLAY(OFF) Do not adjust 4. VSM PRESET (BRIGHT/STD/SOFT) Do not adjust 1. TINT 2. COLOR 3. BRIGHT 4. PICTURE 5. DETAIL Table 3 6. AUDIO Do not adjust 1. STATUS 2. STANDARD SELECTION 3. FM PRESCALE 13. AGC 14. CL 15. AKB 16. HBL 17. BKS 18. READ STATUS 19. VNR Setting item

12

No. 51970

AV-29L31

REPLACEMENT OF CHIP COMPONENT
a CAUTIONS
1. 2. 3. 4. Avoid heating for more than 3 seconds. Do not rub the electrodes and the resist parts of the pattern. When removing a chip part, melt the solder adequately. Do not reuse a chip part after removing it.

a 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.

a REPLACEMENT STEPS
1. How to remove Chip parts
Resistors, capacitors, etc. (1) As shown in the figure, push the part with tweezers and alternately melt the solder at each end.

2. How to install Chip parts
Resistors, capacitors, etc. (1) Apply solder to the pattern as indicated in the figure.

(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 tweezers and remove the chip part.

Transistors, diodes, variable resistors, etc. (1) Apply extra solder to each lead.

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 solder. (3) First solder lead A as indicated in the figure.

SOLDER

SOLDER

A B
(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.

C
(4) Then solder leads B and C.
A B C

Note : After removing the part, remove remaining solder from the pattern.

No. 51970

13

AV-29L31

SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment and parts as given below. 2. Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting values which set the screen to its optimum condition may differ from the initial settings. 3. Make sure that AC power is turned on correctly. 4. Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes. 5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment. 6. Never touch any adjustment parts, which are not specified in the list for this adjustment-variable resistors, transformers, capacitors, etc. 7. Presetting before adjustment. Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.

User mode setting position
Setting item PICTURE MODE(VSM) VNR BASS, TREBLE, BALANCE TINT, COLOR, BRIGHT, PICTURE, DETAIL BRIGHT OFF CENTER CENTER Setting value

MEASURING INSTRUMENT
1. 2. 3. 4. DC voltmeter (or Digital voltmeter) Oscilloscope Signal generator (Pattern generator) [NTSC] Remote control unit

ADJUSTMENT ITEMS

B1 POWER SUPPLY FOCUS ADJUSTMENT IF CIRCUIT ADJUSTMENTS



Adjustment of VCO (CW) Adjustment of DELAY POINT (AGC TAKE-OVER) VC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTS Adjustment of WHITE BALANCE (Low light) Adjustment of WHITE BALANCE (High light) Adjustment of SUB BRIGHT Adjustment of SUB CONTRAST Adjustment of SUB COLOR- Adjustment of SUB COLOR- Adjustment of SUB TINT- Adjustment of SUB TINT- DEFLECTION CIRCUIT ADJUSTMENTS Adjustment of V. SLOPE Adjustment of V. POSITION Adjustment of V. HEIGHT Adjustment of H. POSITION Adjustment of H. WIDTH Adjustment of SIDE PIN Adjustment of TRAPEZIUM Adjustment of V. S-CURVE Adjustment of CORNER Adjustment of H. PARALLEL Adjustment of H. BOW

VSM PRESET SETTING PRESET SETTING AUDIO ADJUSTMENT PURITY ADJUSTMENT CONVERGENCE ADJUSTMENTS

STATIC CONVERGENCE adjustment DYNAMIC CONVERGENCE adjustment

14

No. 51970

AV-29L31

ADJUSTMENT LOCATIONS
FRONT CONTROL PWB ASS'Y (1/2)
FRONT
POWER SW. CN002 S901 CN002 CN003

FRONT CONTROL PWB ASS'Y (2/2)
S805 S801 S803 S804 S806 S802 J304 J303 J302 J801

FRONT

R PW W

S801 : CH UP + S802 : CH DOWN S803 : MENU S804 : TV/VIDEO S805 : VOL UP+ S806 : VOL DOWN

CN001 CN00A

MAIN PWB ASS'Y
FRONT
CN001 W Z

DEG

T 1 IC702 IC701 8

HV GND 5 S
HVT 6 1

B1 6 1 1

U J801 J802 J803 J804

AV IN/OUT

TU001

UPPER : FOCUS (F1) MIDDLE : FOCUS (F2) LOWER : SCREEN

CRT SOCKET PWB ASS'Y

(SOLDER SIDE) TOP

TP-47B

TP-E

TP-47G E1

8 T

1 U 1 6

CRT EARTH (BRAIDED ASS'Y)

No. 51970

15

AV-29L31

BASIC OPERATION IN SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the remote control unit.

2. SERVICE MENU ITEMS
With the SERVICE MENU,various settings (adjustments)can be made,and they are broadly classified in the following items of settings: 1.IF ...................................... For entering/adjusting the setting values (adjustment values)of the IF circuit. 2.VC .................................... For entering/adjusting the setting values (adjustment values)of the VIDEO/CHROMA circuit. 3.DEF .................................. For entering/adjusting the setting values (adjustment values)of the DEFLECTION circuit. 4.VSM PRESET .................. For setting the values of STANDARD,SOFT and BRIGHT. (VSM:video status memory) 5.PRESET ........................... For setting the values of the preset. 6.AUDIO .............................. For entering/adjusting the setting values (adjustment values) of the multiplicity sound circuit. 7.PLUG & PLAY (OFF) ....... This is not used for service.



3. BASIC OPERATION IN SERVICE MENU
(1) How to enter SERVICE MENU Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1 on the next page.) (2) Selection of SUB MENU SCREEN Press one of the keys 1 to 7 on the remote control unit, and select the SUB MENU SCREEN from the SERVICE MENU.(See Fig.1 on the next page.) SERVICE MENU SUB MENU 1. IF 2. VC 3. DEF 4. VSM PRESET 5. PRESET 6. AUDIO 7. PLUG & PLAY (OFF)

(3) Method of Setting *Once the setting values are set,they are memorized automatically. *It must not adjust without inputting a signal. 1) 1. IF [1.VCO ] (a) 1 Key ......................... Select 1.IF. (b) 1 Key ......................... Select 1.VCO. (c) DISPLAY Key ............ When this pressed twice, you will return to the SERVICE MENU. Under normal conditions, no adjustment is required. [2.DELAY POINT ] (a) 1 Key ......................... Select 1. IF. (b) 2 Key ......................... Select 2.DELAY POINT. (c) MENU /+Key ........... Adjust the setting value. (d) DISPLAY Key ........... When this is pressed twice, you will return to the SERVICE MENU.



2) 2. VC, 3. DEF, 4. VSM PRESET, 5. PRESET and 6. AUDIO (a) 2 ~ 6 Keys ................. Select one from 2. VC, 3. DEF, 4. VSM PRESET, 5. PRESET and 6. AUDIO. (b) MENU &/^ key ....... Select setting items. (c) MENU /+Key ........... Adjust the setting values of the setting items. Use the number keys on the remote control unit for setting of WHITE BALANCE. For the setting, refer to each item concerned. (d) DISPLAY Key ........... When this is pressed, you will return to the SERVICE MENU.



3) 7. PLUG & PLAY (OFF) This is not used for service. (4) Release of SERVICE MENU After completing the setting, return to the SERVICE MENU by pressing the DISPLAY key, then again press the DISPLAY key to return to the normal screen.

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No. 51970

AV-29L31

SERVICE MENU
SERVICE MENU

SUB MENU 1. IF

IF 1. IF 2. VC 3. DEF 4. VSM PRESET 5. PRESET 6. AUDIO 7. PLUG & PLAY (OFF) 1-7 : SELECT DISPLAY : EXIT 1-2 : SELECT DISPLAY : EXIT

1. VCO 2. DELAY POINT

VCO (CW) TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW

*****MHz

******* **** ***** ***** **** **** *** ***

DISPLAY : EXIT

DELAY POINT VHF AGC TAKE-OVER

**

- / + : OPERATE

DISPLAY : EXIT

SUB MENU 2. VC
Setting item V/C 1. CUTOFF 60 Hz MENU 89: SELECT MENU - / + : OPERATE DISPLAY : EXIT (R) (G) NTSC3.58

** **

1. CUTOFF (R/G) 2. DRIVE (R/G/B) 3. BRIGHT 4. PICTURE 5. COLOR 6. TINT 7. DETAIL 8. YDELAY

SUB MENU 6. AUDIO
AUDIO 1. STATUS 2. STANDARD SELECTION 3. FM PRESCALE STEREO SAP MONO

SUB MENU 3. DEF
4 : 3 / 16 : 9 Setting item DEF 4:3 NTSC3.58 1. VER. SLOPE 60Hz MENU 89: SELECT MENU - / + : OPERATE DISPLAY : EXIT

*****MHz ******* ********* ***** ** ** ** *** *** ***

**

1. VER. SLOPE 2. VER. HEIGHT 3. VER. POSITION 4. VER. SCURVE 5. HOR. POSITION 6. HOR. WIDTH

MENU 89: SELECT MENU - / + : OPERATE

7. EW-PIN 8. EW-TRAPEZ 9. UP CORNER 10. DW CORNER 11. HOR. PARALL 12. HOR. BOW 13. V. ZOOM

DISPLAY : EXIT

SUB MENU 4. VSM PRESET
BRIGHT / STD / SOFT STANDARD TINT COLOR BRIGHT PICTURE DETAIL MENU 89: SELECT MENU - / + : OPERATE Setting item

** ** ** ** **
DISPLAY : EXIT

1. TINT 2. COLOR 3. BRIGHT 4. PICTURE 5. DETAIL

SUB MENU 5. PRESET
Setting item PRESET 1. CB 60Hz NTSC3.58

*

MENU 89: SELECT MENU - / + : OPERATE DISPLAY : EXIT

1. CB 2. ACL 3. MUS 4. MAT 5. FCO 6. BPS 7. IFLH 8. VID 9. STM

10. AFCW 11. VSW 12. FFI 13. AGC 14. CL 15. AKB 16. HBL 17. BKS 18. READ STATUS 19. VNR

Fig. 1

No. 51970

17

AV-29L31

ADJUSTMENTS
B1 POWER SUPPLY
Item Check of B1 POWER SUPPLY Measuring instrument Signal Generator Test point Adjustment part Description 1. Receive a black and white signal. 2. Connect a DC voltmeter between B1 and GND (between pins 1 and 5 of the connector CN00S). 3. Make sure that the voltage is DC134.5 2V.

B1 (pin 1) GND (pin 5) [CN00S DC Voltmeter connector in MAIN PWB]

FOCUS ADJUSTMENT
Item Adjustment of FOCUS Measuring instrument Signal generator Test point Adjustment part FOCUS1 VR FOCUS2 VR [In HVT] Description Notes: Proceed to the following this adjustment after having completed the adjustments of B1 POWER SUPPLY, SUB BRIGHT and SUB CONT. Set PICTURE MODE (VSM) to "BRIGHT". The final adjustment of CONVERGENCE must be done after the FOCUS adjustment. (CONVERGENCE is changed by FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment. 1. Receive a cross-hatch signal. 2. While looking at the screen center, adjust the FOCUS2 VR (F2) so that the horizontal lines will be clear and in fine detail. 3. Adjust the FOCUS1 VR (F1) so that the vertical lines will be clear and in fine detail. 4. Make sure that the picture is in focus even when the screen gets darkened.

IF CIRCUIT ADJUSTMENTS
Item Adjustment of VCO (CW) Measuring instrument Remote control unit Test point Adjustment part VCO (CW) Description Note: Under normal conditions, no adjustment is required. Select 1. IF from the SERVICE MENU. Select 1. VCO by pressing the 1 key on the remote control unit. Receive a broadcast signal. Check the characters color of the BELOW REFERENCE displayed to yellow. 5. Press the DISPLAY key three times to return to normal screen. 1. 2. 3. 4.

VCO (CW)

.

MHz

fv

TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW DISPLAY : EXIT

YELLOW

Adjustment of DELAY POINT (AGC TAKE-OVER)

Remote control unit

DELAY POINT

Setting (Adjustment time) DELAY POINT (AGC TAKE-OVER)

Initial setting value 22

1. Receive a black and white broadcast signal (color off). 2. Select 1. IF from the SERVICE MENU. 3. Select 2. DELAY POINT by pressing the 2 key on the remote control unit. 4. Adjust the MENU /+ key in order to eliminate any noise or beat from the image. Any increase above the initial value produces noise and any decrease below it produces beat. 5. Press the DISPLAY key three times to return to the normal screen. 6. Turn to other channels and make sure that there are no irregularities.

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No. 51970

AV-29L31

VC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTS
The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. Do not change the initial setting values of the setting (adjustment) items not listed in "ADJUSTMENT".



[SUB MENU 2. VC]

: Do not adjust. Setting (Adjustment) item Initial setting value Variable range 7 -- +8 30 -- +31 30 -- +31 30 -- +31 30 -- +31 30 -- +31 30 -- +31 8 -- +7 NTSC3.58 0 0 1/16/0/0/0 0 12 15/+6 24/-10 0/+1 -- +10 -- --/0 -- COMPONENT

1 2 3 4 5 6 7 8

CUTOFF (R/G) DRIVE (R/G/B) BRIGHT (COM./TV/V-1/V-2/V-3) PICTURE COLOR TINT (TV/VIDEO) DETAIL (TV/VIDEO) YDELAY (TV/VIDEO)

Item Adjustment of WHITE BALANCE (Low light)

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part 1. CUTOFF (R) CUTOFF (G) SCREEN VR [In HVT]

Description Note: Set PICTURE MODE (VSM) to "BRIGHT".

V/C 1. CUTOFF (R) (G)

NTSC3.58

** **

60 Hz MENU 89: SELECT MENU - / + : OPERATE DISPLAY : EXIT

1. Receive a NTSC black and white signal (color off). 2. Select 2. VC from the SERVICE MENU. 3. Select 1. CUTOFF (R) and (G) with MENU &/^ key, and set each value to initial setting value with the 4 and 7 keys, or 5 and 8 keys on the remote control unit. 4. Press the 1 key on the remote control unit to produce a single horizontal line. 5. Turn the SCREEN VR fully counterclockwise, then slowly turn it clockwise to where a red, blue or green color is faintly visible. 6. Use the keys 4 and 7 or 5 and 8 on the remote control unit and adjust the other 2 colors to where the single horizontal line appears white. 7. Turn the SCREEN VR to where the single horizontal line glows faintly. 8. Press the 2 key to return to 1. CUTOFF screen. 9. Press the DISPLAY key twice to return to the normal screen. Setting (Adjustment) Item Variable range 7 -- +8 7 -- +8 Initial setting value 0 0

REMOTE CONTROL UNIT
H.LINE OFF 1 H.LINE ON G. CUTOFF (8) 4 R. CUTOFF (8) 7 R. CUTOFF (9) G.CUTOFF (9) 8 9 5 6 2 3

1. CUT OFF

R G

No. 51970

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AV-29L31

Item Adjustment of WHITE BALANCE (High light)

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part 2. DRIVE (R) DRIVE (G) DRIVE (B)

Description Notes: Proceed to the following this adjustment after having completed the adjustment of LOW LIGHT WHITE BALANCE. Set PICTURE MODE (VSM) to "BRIGHT".

V/C 1. DRIVE (R) (G) (B)

NTSC3.58

60 Hz MENU 89: SELECT MENU - / + : OPERATE

** ** **
DISPLAY : EXIT

1. Receive a NTSC black and white signal (color off). 2. Select 2. VC from the SERVICE MENU. 3. Select 2. DRIVE (R), (G) and (B) with MENU &/^ key,and set each value to initial setting value with the 4 to 9 keys on the remote control unit. 4. Use the keys 4 to 9 to produce a white screen. 5. Press the DISPLAY key twice to return to the normal screen. Setting (Adjustment) Item Variable range 30 -- +31 30 -- +31 30 -- +31 Initial setting value 0 0 0

REMOTE CONTROL UNIT

R 2. DRIVE G B
G. DRIVE (8)

1

2

3

4 R. DRIVE (8) 7 R. DRIVE (9)

5

6 B. DRIVE (8)

8

9 B. DRIVE (9) G.DRIVE (9)

Adjustment of SUB BRIGHT

Remote control unit

3. BRIGHT

Notes: Proceed to the following this adjustment after having completed the adjustments of LOW LIGHT WHITE BALANCE and HIGH LIGHT WHITE BALANCE. Set PICTURE MODE (VSM) to "BRIGHT". 1. 2. 3. 4. 5. Receive a broadcast. Select 2. VC from the SERVICE MENU. Select 3. BRIGHT with the MENU &/^ key. Set the initial setting value with the MENU /+ key. If the brightness is not best with the initial setting value, make fine adjustment until you get the best brightness. 6. Press the DISPLAY key twice to return to the normal screen.

Adjustment of SUB CONTRAST

Remote control unit

4. PICTURE

Notes: Proceed to the following this adjustment after having completed the adjustment of SUB BRIGHT. Set PICTURE MODE (VSM) to "BRIGHT". 1. 2. 3. 4. 5. Receive a broadcast. Select 2. VC from the SERVICE MENU. Select 4. PICTURE with the MENU &/^ key. Set the initial setting value with the MENU /+ key. If the contrast is not best with the initial setting value, make fine adjustment until you get the best contrast. 6. Press the DISPLAY key twice to return to the normal screen.

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No. 51970

AV-29L31

Item Adjustment of SUB COLOR-I

Measuring instrument Remote control unit

Test point

Adjustment part 5. COLOR

Description [Method of adjustment without measuring instrument] Notes: Proceed to the following this adjustment after having completed the adjustment of SUB PICTURE. Set PICTURE MODE (VSM) to "BRIGHT". Receive a NTSC broadcast. Select 2. VC from the SERVICE MENU. Select 5. COLOR with the MENU &/^ key. Set the initial setting value for NTSC3.58 COLOR with the MENU /+ key. 5. If the color is not best with the initial setting value, make fine adjustment until you get the best color. 6. Press the DISPLAY key twice to return to the normal screen. 1. 2. 3. 4.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------Signal TP-47G 5. COLOR [Method of adjustment using measuring instrument] Adjustment generator TP-E (H) of Notes: [CRT SUB Proceed to the following this adjustment after having completed the Oscilloscope SOCKET COLOR-II adjustment of SUB PICTURE. PWB] Set PICTURE MODE (VSM) to "BRIGHT". Remote 1. Receive a NTSC color bar signal (full field color bar 75% white). control unit 2. Select 2. VC from the SERVICE MENU. 3. Select 5. COLOR with the MENU &/^ key. 4. Set the initial setting value of NTSC3.58 COLOR with the MENU /+ key. 5. Connect the oscilloscope between TP-47G and TP-E. 6. Adjust NTSC3.58 COLOR to set the value (A) in the figure to +2V (VW-G).
Mg R B

(A)
Cy () 0V (+)

W

Y

G

No. 51970

21

AV-29L31

Item Adjustment of SUB TINT-I

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part 6. TINT

Description [Method of adjustment without measuring instrument] Notes: Proceed to the following this adjustment after having completed the adjustment of SUB PICTURE. Set PICTURE MODE (VSM) to "BRIGHT". 1. 2. 3. 4. 5. Receive a NTSC color bar signal (full field color bar 75% white). Select 2. VC from the SERVICE MENU. Select 6. TINT with the MENU &/^ key. Set the initial setting value of NTSC 3.58 with the MENU /+ key. If you cannot get the best tint with the initial setting value, make fine adjustment until you get the best tint. 6. Press the DISPLAY key twice to return to the normal screen.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------TP-47G Signal 6. TINT [Method of adjustment using measuring instrument] Adjustment TP-E (H) generator of Notes: [CRT SUB TINT-II Proceed to the following this adjustment after having completed the Oscilloscope SOCKET adjustment of SUB PICTURE. PWB] Set PICTURE MODE (VSM) to "BRIGHT". Remote 1. Receive a NTSC color bar signal (full field color bar 75% white). control unit 2. Select 2. VC from the SERVICE MENU. 3. Select 6. TINT with the MENU &/^ key. 4. Set the initial setting value of NTSC 3.58 with the MENU /+ key. 5. Connect the oscilloscope between TP-47G and TP-E. 6. Adjust NTSC 3.58 TINT to set the value (B) in the figure to +3V (Vw-cy). 7. Press the DISPLAY key twice to return to the normal screen.

Mg R

B

(B) Cy W
G Y () 0V (+)

22

No. 51970

AV-29L31

DEFLECTION CIRCUIT ADJUSTMENTS
The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. Note: Proceed to the following this adjustment after having completed the adjustments of SUB BRIGHT and SUB PICTURE. [SUB MENU 3. DEF] Setting (Adjustment) item 1. VER. SLOPE 2. VER. HEIGHT 3. VER. POSITION 4. VER. SCURVE 5. HOR. POSITION 6. HOR. WIDTH 7. EW-PIN 8. EW-TRAPEZ 9. UP CORNER 10. DW CORNER 11. HOR. PARALL 12. HOR. BOW 13. V.ZOOM Initial setting value Variable range COMPRESS(16:9): OFF 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 31 -- +31 0 0 1 0 +7 1 1 0 0 0 0 0 1 COMPRESS(16:9): ON -- 24 -- -- -- -- 12 -- 0 0 -- -- +14 COMPONENT -- -- -- -- +7 -- -- -- -- -- -- -- --

[COMPRESS(16:9): OFF] Item Adjustment of V. SLOPE Measuring instrument Signal generator Remote control unit Test point Adjustment part 1. VER. SLOPE 1. 2. 3. 4. Description Receive a NTSC circle pattern signal. Select 3. DEF from the SERVICE MENU. Select 1. VER. SLOPE with the MENU &/^ key. Set the initial setting value of 1. VER. SLOPE with the MENU /+ key. 5. Adjust 1. VER. SLOPE to make "A = B" with the MENU /+ key.

A Blanking line B

Adjustment of V.POSITION

Signal generator Remote control unit

3. VER. POSITION

6. Select 3. VER. POSITION with the MENU &/^ key. 7. Set the initial setting value of 3. VER. POSITION with the MENU /+ key. 8. Adjust 3. VER. POSITION to make "A = B" with the MENU /+ key.

A

(to be continued)

B

No. 51970

23

AV-29L31

Item Adjustment of V. HEIGHT

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part 2. VER. HEIGHT 13. V. ZOOM

Description 9. Receive a NTSC cross-hatch signal. 10. Select 2. VER. HEIGHT with the MENU &/^ key. 11. Set the initial setting value of 2. VER. HEIGHT with the MENU /+ key. 12. Select 13. V. ZOOM with the MENU &/^ key. 13. Set the initial setting value of 13. V. ZOOM with the MENU /+ key. 14. Adjust 13. V. ZOOM and make the vertical screen size 91% of the picture size with the MENU /+ key.

Screen size 91%

Picture size 100%

Adjustment of H. POSITION

Signal generator Remote control unit
C

5. HOR. POSITION

15. Receive a NTSC circle pattern signal. 16. Select 5. HOR. POSITION with the MENU &/^ key. 17. Set the initial setting value of 5. HOR. POSITION with the MENU /+ key. 18. Adjust 5. HOR POSITION to make "C=D" with the MENU /+ key.

D

Adjustment of H. WIDTH

Signal generator Remote control unit
Screen size 91%

6. HOR. WIDTH

19. Receive a NTSC cross-hatch signal. 20. Select 6. HOR. WIDTH with the MENU &/^ key. 21. Set the initial setting value of 6. HOR. WIDTH with the MENU /+ key. 22. Adjust 6. HOR. WIDTH and make the horizontal screen size 91% of the picture size with the MENU /+ key.

(to be continued)

Picture size 100%

24

No. 51970

AV-29L31

Item Adjustment of SIDE PIN

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part 7. EW-PIN

Description 23. Select 7. EW-PIN with the MENU &/^ key. 24. Set the initial setting value of 7. EW-PIN with the MENU /+ key. 25. Adjust 7. EW-PIN so that the first vertical lines at the left and right edges on the screen are straight.

Straight

Adjustment of TRAPEZIUM

Signal generator Remote control unit
Parallel

8. EW-TRAPEZ

26. Select 8. EW-TRAPEZ with the MENU &/^ key. 27. Set the initial setting value of 8. EW-TRAPEZ with the MENU /+ key. 28. Adjust 8. EW-TRAPEZ so that the vertical lines at the left and right edges on the screen are in parallel.

Adjustment of V. S-CURVE

Signal generator Remote control unit

4. VER. SCURVE

29. Select 4. VER. SCURVE with the MENU &/^ key. 30. Set the initial setting value of 4. VER. SCURVE with the MENU /+ key. 31. Adjust 4. VER. SCURVE so that the spaces of each line on TOP, CENTER and BOTTOM become uniform.

TOP

CENTER

(to be continued)

BOTTOM

No. 51970

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AV-29L31

Item Adjustment of CORNER

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part 9. UP CORNER 10. DW CORNER

Description 32. Select 9. UP CORNER with the MENU &/^ key. 33. Set the initial setting value of 9. UP CORNER with the MENU /+ key. 34. Select 10. DW CORNER with the MENU &/^ key. 35. Set the initial setting value of 10. DW CORNER with the MENU /+ key. 36. Adjust 9. UP CORNER and 10. DW CORNER so that the vertical lines at the four corners on the screen are straight.

Adjustment of H. PARALLEL

Signal generator Remote control unit

11. HOR. PARALL

37. Select 11. HOR. PARALL with the MENU &/^ key. 38. Set the initial setting value of 11. HOR. PARALL with the MENU /+ key. 39. Adjust 11. HOR. PARALL to optimize the parallelogram distortion.

Adjustment of H. BOW

Signal generator Remote control unit
Straight

12. HOR. BOW

40. Select 12. HOR. BOW with the MENU &/^ key. 41. Set the initial setting value of Select 12. HOR. BOW with the MENU /+ key. 42. Adjust 12. HOR. BOW to optimize the horizontal arc distortion. 43. Press the DISPLAY key twice to return to the normal screen.

26

No. 51970

AV-29L31

[COMPRESS (16:9): ON] Item Adjustment of V. HEIGHT Measuring instrument Signal generator Remote control unit Test point Adjustment part 13. V. ZOOM 2. VER. HEIGHT 1. 2. 3. 4. 5. 6. Description Receive a NTSC cross-hatch signal. Select COMPRESS from the MENU and set COMPRESS to ON. Select 3. DEF from the SERVICE MENU. Set the initial setting value of 13. V. ZOOM with the MENU /+ key. Select 2. VER. HEIGHT with the MENU &/^ key. Set the initial setting value of 2. VER. HEIGHT with the MENU /+ key. 7. Adjust 2. VER. HEIGHT to set the vertical amplitude of the image to 295 mm.

Screen size

Screen size

295 mm

Adjustment of SIDE PIN

Signal generator Remote control unit

7. EW-PIN

8. Select 7. EW-PIN with the MENU &/^ key. 9. Set the initial setting value of 7. EW-PIN with the MENU /+ key. 10. Adjust 7. EW-PIN so that the first vertical lines at the left and right edges on the screen are straight.

Straight

Adjustment of CORNER

Signal generator Remote control unit

9. UP CORNER 10. DW CORNER

11. Select 9. UP CORNER with the MENU &/^ key. 12. Set the initial setting value of 9. UP CORNER with the MENU /+ key. 13. Select 10. DW CORNER with the MENU &/^ key. 14. Set the initial setting value of 10. DW CORNER with the MENU /+ key. 15. Adjust 9. UP CORNER and 10. DW CORNER so that the vertical lines at the four corners on the screen are straight. 16. Press the DISPLAY key twice to return to the normal screen.

No. 51970

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AV-29L31

[VIDEO-2 SET: COMPONENT] Item Adjustment of H. POSITION Measuring instrument Signal generator Remote control unit
C D

Test point

Adjustment part 5. HOR. POSITION

Description 1. Receive a NTSC circle pattern signal to VIDEO-2 terminal. 2. Select VIDEO-2 SET from the MENU and set VIDEO-2 SET to COMPONENT. 3. Select 3. DEF from the SERVICE MENU. 4. Select 5. HOR. POSITION with the MENU &/^ key. 5. Set the initial setting value of 5. HOR. POSITION with the MENU /+ key. 6 Adjust 5. HOR POSITION to make "C=D" with the MENU /+ key. 7. Press the DISPLAY key twice to return to the normal screen.

VSM PRESET SETTING
Item Setting of VSM PRESET Measuring instrument Remote control unit Test point Adjustment part 1. TINT 2. COLOR 3. BRIGHT 4. PICTURE 5. DETAIL Description 1. Select 4. VSM PRESET from the SERVICE MENU. 2. Select BRIGHT with the PICTURE MODE key. 3. Adjust the MENU &/^ key and MENU /+ key to reset the set values of 1. TINT 5. DETAIL to the values shown in the table. 4. Respectively select the VSM PRESET mode for SOFT and STANDARD, and make similar adjustment as in 3 above.
SUB MENU 4. VSM PRESET
BRIGHT TINT COLOR BRIGHT PICTURE DETAIL MENU 89: SELECT MENU - /+ : OPERATE DISPLAY : EXIT

5. Press the DISPLAY key twice to return to the normal screen.
[Setting Values for SUB MENU 4. VSM PRESET] VSM preset VSM mode Setting item 1. TINT SETTING VALUE 2. COLOR SETTING VALUE 3. BRIGHT SETTING VALUE 4. PICTURE SETTING VALUE 5. DETAIL SETTING VALUE

** ** ** ** **

BRIGHT

STANDARD

SOFT

15 15 15 30 15 15 11 0

28

No. 51970

AV-29L31

PRESET SETTING

Do not adjust 5. PRESET in the SERVICE MENU as it requires no adjustment.
[SUB MENU 5. PRESET] Setting item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 CB ACL MUS MAT FCO BPS IFLH VID STM AFCW VSW FFI AGC CL AKB HBL BKS READ STATUS VNR Variable range 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 00/10/01 50 -- 95 0/1 0/1 0/1 -- 00 -- 63 Initial setting value 0 0 0 0 0 0 0 0 0 0 0 0 10 77 0 0 1 -- 25

AUDIO ADJUSTMENT

Do not adjust 6. AUDIO (1. STATUS, 2. STANDARD SELECTION, 3. FM PRESCALE) in the SERVICE MENU as it requires no adjustment.
[SUB MENU 6. AUDIO]
Setting item 1. STATUS (Do not adjust.) Variable range -- -- 00H FFH 00H FFH 00H FFH Initial setting value (fixed) -- -- 34H 34H 34H

2. STANDARD SELECTION (Do not adjust.) 3. FM PRESCALE (Do not adjust.) STEREO SAP MONO

No. 51970

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AV-29L31

PURITY ADJUSTMENT
Note: The final adjustment of CONVERGENCE must be done after the FOCUS adjustment. (CONVERGENCE is changed by FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment.

WEDGE

DEFLECTION YOKE

1. Demagnetize CRT with the demagnetizer. 2. Loosen the retainer screw of the deflection yoke. 3. Remove the wedges. 4. Input a green raster signal from the signal generator, and turn the screen to green raster. 5. Move the deflection yoke backward. P/C MAGNETS 6. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig. 2) 7. Adjust the gap between two lugs so that the GREEN RASTER will come into the center of the screen. (Fig. 3) 8. Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green. 9. Insert the wedge to the top side of the deflection yoke so that it will not move. 10. Input a crosshatch signal. 11. Verify that the screen is horizontal. 12. Input red and blue raster signals, and make sure that purity is properly adjusted.
Long lug
CRT

P

46

P/C MAGNETS

P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets) Fig. 1

PURITY MAGNETS

Short lug Bring the long lug over the short lug and position them horizontally.

Fig. 2

(FRONT VIEW)

GREEN RASTER

CENTER
Fig. 3

30

No. 51970

AV-29L31

CONVERGENCE ADJUSTMENTS
STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 4) and turn them to magenta (red/ blue). 3. Using 6-pole convergence magnets, overlap the magenta(red/blue) and green lines in the center of the screen and turn them to white. 4. Repeat 2 and 3 above, and make best convergence. Fig. 4 (FRONT VIEW)

(FRONT VIEW)

YH GREEN BLUE

DYNAMIC CONVERGENCE ADJUSTMENT
1. Using the YH VR on the deflection yoke, match the YH (CROSS). (Fig. 5 and 8) RED 2. Using the YV VR on the deflection yoke, match the YV. (Fig. 6 and 8) GREEN 3. Repeat the steps 1 and 2, obtain an optimum convergence. 4. Differential coil ADJUSTMENT. In case where the horizontal lines of red and blue around the center of both sides of the picture as shown in Fig. 7, adjust the XV difference by using the differential coil on the top of the deflection yoke (Fig. 8) so as to minimize the XV difference. BLUE

RED

RED GREEN BLUE

BLUE

GREEN YH Fig. 5

RED

After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke. Fix the PC magnet with glue. (FRONT VIEW) RED GREEN BLUE YV GREEN BLUE RED RED GREEN BLUE

YV VR

YH VR

BLUE GREEN RED YV Fig. 6

FRONT XV coil

(FRONT VIEW)
Fig. 8

Xv

GREEN

Fig. 7

No. 51970

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AV-29L31

SELF-CHECK FUNCTIONS
1. Outline This model has self-check functions given below.When an abnormality has been detected,the SUB POWER is turned off and both ECO and ON TIMER LEDs flash to inform of the failure.An abnormality is detected by the signal input state of the control line connected to the microcomputer.

2. Self check items Check item Over-current protection Details of detection An over-current on the low B line is detected. Method of detection The main microcomputer detects the possible abnormality at 30msec.intervals and judges the results in every 16 time. Of the 16 times, if NG is detected more than 9 times, it is judged that there is an abnormality. State of abnormality When an abnormality has been detected, the SUB-POWER is turned off. While the SUBPOWER is being turned off, the POWER key on the remote control unit is not operational until the power cord is taken out and put in again. DITTO

CRT NECK protection

Operation of CRT NECK protection circuit

DITTO

3. Self check indicating function When an abnormality has been detected at about 5 seconds after the power is turned on,the SUB POWER is turned off immediately and the LEDs flash.

After about 5 seconds

Detection of an abnormality

Power on

Start of detection

Flashing LEDs

SUB-POWER OFF

[ Indication by the LEDs]

Item 1 Over-current protection 2 CRT NECK protection Note: In case of 1 + 2, the item 1 is indicated.

LEDs flashing intervals At 0.2-second intervals At 1-second intervals

Priority of detection 1 2

32

No. 51970

VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan
AV29L31M-H #4 Printed in Japan VP0201 SW