How it Works
JVC
Loading...
AV29TS4EK
Table of contents
Loading...

JVC AV21TS4EK, AV21TS4EKC, AV21TS4EN, AV21TS4ENC, AV21TS4ENSC Service manual & schematics

...
Download
Page 1

JVC AV-29TS4 EK

General Information

Also Covers
AV-21TS4 EK & AV-25TS4 EK
JH Chassis

Recommended Safety Parts

Item Part No. Description
(21” Models)
(25” Models)
V01 A59ECF50X05 ITC TUBE (C) Inc. DY, PC, WED L01 CELD019-002J7 DEGAUSSING COIL T1551 CETH018-00AJ1 H.V.TRANSF. (SERVICE) 3 AEEMP003-185A POWER CORD 4 CM46618-A01-E POWER CORD CLAMP 5 LC20075-021A-U RATING LABEL R1475 QRJ14RJ-2R2X CR 22 Ω 1/4W J R1552 QRZ9017-4R7 FUSI. RESISTOR 4.7 Ω 1/4W J R1553 QRZ9021-1R0 FUSI. RESISTOR 1 Ω 1W J R1554 QRZ9021-1R0 FUSI. RESISTOR 1 Ω 1W J R1585 QRA14CF-1582Y MF R 15.8k Ω 1/4W F R1586 QRA14CF-2541Y MF R 254k Ω 1/4W F R1991 QRZ0057-825 CR 8.2M Ω 1W J C1521 QFZ0122-362 MPP CAP. 3600pF 1.8kVH±3% C1522 QFZ0152-8001 MPP CAP. 8000pF 1.5kVH±2.5% C1523 QFP32GJ-333 PP CAP. 0.033uF 400V J C1524 QFZ0119-474 HPP CAP. 0.47uF 200V ±3% C1525 QFZ0104-304 MPP CAP. 0.3uF 250V J C1531 QFZ0119-204 MPP CAP. 0.2uF 200V±3% C1901 QCZ9054-472 C CAP. 4700pF AC250V Z C1902 OCZ9054-472 C CAP. 4700pF AC250V Z C1903 QCZ9054-472 C CAP. 4700pF AC250V Z C1992 QCZ9079-471 C CAP. 470pF AC250V K C1993 QC79079-332 C CAP. 3300pF AC250V K T1901 CETS121-001JC SW TRANSF. D1901 D3SBA60 DIODE BRIDGE Q1521 BU2508AX POWER TRANSISTOR H.OUT CP1951 ICP-N50-Y I.C. PROTECT CP1952 ICP-N50-Y I.C. PROTECT CP1955 ICP-N38-Y I.C. PROTECT PC1901 TLP721F(D4-GR) I.C. (P.H. COUPLER) SK3001 CE42446-001 C.R.T. SOCKET C8901 QFZ9040-474 M.F. CAPACITOR 0.47uF AC275V M C8904 QFZ9040-473 M.F. CAPACITOR 0.047uF AC275V M F8901 QMF51D2-3R15J1 FUSE 3.15A LF8901 CE42144-001J2 LINE FILTER S8901 QSW0750-001 PUSH SWITCH MAIN POWER TH8901 CEKP011-001J2 W.P. THERMISTOR 11 LCT0296-001A-U INST BOOK
(29” Models)
V01 A68ESF002X111 ITC TUBE (C) Inc.DY, PC, WED L01 CELD020-004J7 DEGAUSSING COIL T1551 CETH019-00AJ1 H.V. TRANSF. (SERVICE) 1 CM12798-A02-E REAR COVER 3 AEEMP003-185A POWER CORD 4 CM47016-001-H CORD CLAMP 5 LC20075-020A-U RATING LABEL
Recommended Safety Parts
Item Part No. Description
R1475 QRJ146J-2R2X C R 2.2Ω 1/4W R1552 QRZ9017-4R7 FUSI. RESISTOR 4.7Ω 1/4W J R1553 QRZ9021-1R0 FUSI. RESISTOR 1Ω 1W J R1554 QRZ9021-1R0 FUSI. RESISTOR 1Ω 1W J R1585 QRA14CF-1582Y MF R 15.8kΩ 1/4W F R1586 QRA14CF-2941Y MF R 2.94kΩ 1/4W F R1991 QRZ0057-825 C R 8.2MΩ 1W J C1521 QFZ0152-4001 MPP CAP. 4000pF 1.5kVH±25% C1522 QFZ0152-5501 MPP CAP. 9500pF 1.5kVH±25% C1523 QFP32GJ-223 PP CAP. 0.022uF 400V J C1524 QFZ0119-684 MPP CAP. 0.68uF 200V±3% C1525 QFZ0194-364 MM CAP. 0.36uF 250V J C1531 QFZ0119-154 MPP CAP. 0.51uF 200V±3% C1901 QCZ9054-472 C CAP. 4700pF AC250V Z C1902 QCZ9054-472 C CAP. 4700pF AC250V Z C1903 QCZ9054-472 C CAP. 4700pF AC250V Z C1992 QCZ9079-471 C CAP. 470pF AC250V K C1993 QCZ9079-332 C CAP. 3300pF AC250V K T1901 CETS120-001J7 SW TRANSF. D1901 D3SBA60 DIODE BRIDGE Q1521 BU2508AX POWER TRANSISTOR H.OUT CP1951 ICP-N50-Y I.C.PROTECT CP1952 ICP-N50-Y I.C.PROTECT CP1955 ICP-N30-Y I.C.PROTECT PC1901 TCP721F (D4-GR) I.C. (PH.COUPLER) SK3001 CE642446-001 C.R.T.SOCKET C8901 QFZ9040-474 M.F.CAPACITOR 0.47uF AC275V M C8904 QFZ9040-473 M.F.CAPACITOR 0.047uF AC275V M F8901 QMF51D2-3R15J1 FUSE 3.15A LF8901 CE42144-001J2 LINE FILTER S8901 QSW0750-001 PUSH SWITCH MAIN POWER TH8901 CEKP010-001J2 W.P.THERMISTOR 11 LCT0296-001A-U INST BOOK

E2prom Replacement

REPLACEMENT OF MEMORY IC’s
1. Memory IC
This TV use a non-volatile memory IC (EEPROM IC). In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing it, be sure to use a memory IC containing the initial values (not blank ones).
2. Procedure for replacing memory IC’s Procedure
1) Power off
Switch the power oft and unplug the power code from the outlet.
2) Replacing the memory IC
Be sure to use memory ICs written with the initial data values.
3) Power on
Plug the power code into the outlet and switch the power on.
4) Check and set SYSTEM CONSTANT SET
1) Press the INFORMATION key and the MUTE key of the REMOTE CONTROL UNIT simultane­ously.
2) The SERVICE MENU screen shown in Fig. 1 will be displayed.
3) While the SERVICE MENU is displayed, press the INFORMATION key and MUTE key simultaneously, and the SYSTEM CONSTANT SET screen shown in Fig. 2 will be displayed.
4) Check the setting value of the SYSTEM CONSTANT SET shown in Table 1. If the value is different, select the setting item with the FUNCTION UP/DOWN key, and set the correct value with the FUNCTION -/+ key.
5) Press the MENU key to memorize the setting value.
6) Press the INFORMATION key twice, and return to the normal screen.
5) Setting of receive channels
Set the receive channels. For setting, refer to the OPERATING INSTRUCTIONS.
6) User Setting
Check the user setting value of 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 items of the SERVICE MENU of Table 3, and reset where necessary. For setting, refer to the SERVICE ADJUSTMENTS.
Fig. 1
Fig. 2 REMOTE CONTROL KEYS
SETTING VALUES OF SYSTEM CONSTANT SET
Setting item
1. COUNTRY
Setting content
Setting value (AV-21TS4EK)
UK
Setting value (AV-25TS4EK)
Setting value (AV-29TS4EK)
Setting item
2. INCH
Setting content
Setting value (AV-21TS4EK)
21
Setting value (AV-25TS4EK)
25
Setting value (AV-29TS4EK)
29
USER SETTING VALUES
Setting item Setting value
SUB POWER ON CHANNEL 1 POSITION CHANNEL PRESET See; OPERATING
INSTRUCTIONS VOLUME Appropriate sound volume TV/EXT TV DISPLAY CHANNEL DISPLAY COLOUR SYSTEM TV / PAL HYPERSOUND OFF COOL/NORMAL COOL SLEEP TIMER OFF TV SPEAKER ON BLUE BACK ON ZOOM MODE REGULAR TONE OFF BALANCE, BASS, TREBLE CENTRE LANGUAGE ENGLISH CHILD LOCK ID No.******
SERVICE MENU SETTING ITEMS Service menu & Setting item
1. IF
1. VCO
2. DELAY POINT
2. V/C
1. CUT OFF (R, G, B)
2. DRIVE (R, B)
3. BRIGHT
4. CONT.
5. COLOUR (PAL/NTSC)
6. TINT (NTSC)
7. BLACK OFFSET (Do not adjust)
8. SHARP
9. TEXT (RGB) CONT(Do not adjust)
10. DC TRAN RATE (Do not adjust)
11. BLACK STRETCH (Do not adjust)
12. B.S.OFF (Do not adjust)
3. AUDIO
1. CONC LIMIT (Do not adjust)
2. A2 ID THR (Do not adjust)
4. DEF.
1. TRAPEZ (Except for AV-21TS4EK)
2. V-SHIFT
3. V-SlZE
4. H-CENT
5. H-SIZE (Except for AV-21TS4EK)
6. EW-PIN (Except for AV-21TS4EK)
7. V-S. CR
8. V-EDGE (Except for AV-21TS4EK)
9. EW-COR (Except for AV-21TS4EK)
10.V-LIN (Only: AV-21TS4EK)
11.ABL POINT (Do not adjust)
12.ABL GAIN (Do not adjust)
5. VSM PRESET
COOL/NORMAL/WARM
1. BRIGHT
2. CONT.
3. COLOUR
4. SHARP
5. TINT
6. R DRIVE
7. B DRIVE
8. BASS
9.TREBLE
6. VPS (Do not adjust)
VPS
7. AUTO PROGRAM (Do not adjust)
ON / OFF
8. MAX VOLUME
LEVEL

Service Adjustments

BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 ways of adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.
2. 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.
3. Turn on the power of the TV and measuring equipment for warming up for at least 30 minutes before starting adjustment.
4. Make sure that connection is correctly made to AC power source.
5. If the receive or input signal is not specified, use the most appropriate signal for adjust­ment.
6. Never touch parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service adjust­ment.
7. Preparation for adjustment (presetting): Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT:
1) PICTURE MODE (VSM)
COOL
2) SLEEP TIMER
OFF
3) DIGITAL SURROUND
OFF
4) BALANCE
CENTRE
5) ECO
OFF
6) ZOOM
REGULAR
MEASUREMENT EQUIPMENT AND FIX­TURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL / NTSC]
4. Remote control unit
Continues on next page.
Page 2
JVC AV-29TS4 EK

Adjustments Cont’d

ADJUSTMENT ITEMS
• B1 power supply check
• FOCUS adjustment
• IF circuit adjustment
• VSM PRESET setting adjustment
• VIDEO / CHROMA circuit adjustment
• DEFLECTION circuit adjustment
• AUDIO circuit adjustment (Do not adjust)
• Setting of MAX VOLUME
BASIC OPERATION OF 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 (adjustments):
1) 1. IF
This mode adjusts the data of the IF circuit.
2) 2. V/C
This mode adjusts the data of the VIDEO / CHROMA circuit.
3) 3. AUDIO
This mode adjusts the setting values of the multiplicity SOUND circuit. (Do not adjust).
4) 4. DEF
This mode adjusts the setting values of the DEFLECTION circuit.
5) 5. VSM PRESET
This mode adjusts the initial setting values of COOL, NORMAL and WARM. (VSM : Video Status Memory)
6) 6. VPS
This mode shows the monitor of the VPS and PDC. (Do not adjust). (VPS : Video Program System, PDC : Program Delivery Code)
7) 7. AUTO PROGRAM
By turning the powerswitch on, you can get the state of AUTO PROGRAM. (Do not adjust).
8) 8. MAX VOLUME
This mode adjusts the MAX VOLUME. (Do not adjust under normal condition).
3. BASIC OPERATION OF SERVICE MENU
1) How to enter SERVICE MENU
Press the INFORMATION and the MUTE key of the REMOTE CONTROL UNIT simultaneously and the SERVICE MENU screen of Fig.1 will be displayed.
2) Selection of SUB MENU SCREEN
1) Press one of the keys 1~8 of the REMOTE CONTROL UNIT, and select the SUB MENU SCREEN from the SERVICE MENU.
SERVICE MENU SUB MENU
1. IF
2. V/C
3. AUDIO
4. DEF.
5. VSM PRESET
6. VPS
7. AUTO PROGRAM
8. MAX VOLUME
Fig. 1
ADJUSTMENT LOCATIONS
REMOTE CONTROL KEYS
Fig. 2 (3) Method of Setting
1) Method of Setting 1. IF
[1. VCO] (2) 1 Key. Select 1.IF. (2) 1 Key. Select 1.VCO. (3) The VCO (CW) screen will be displayed in yellow when the AFC voltage is at a certain level
and in blue when it is at other levels. (4) INFORMATION Key. As you press this twice, you will return to the SERVICE MENU.
[2. DELAY POINT] (1) 1 Key. Select 1.IF. (2) 2 Key. Select 2.DELAY POINT. (3) FUNCTION -/+. Set (adjust) the setting values of the setting items. (4) MENU Key. Memorize the set value. (Before storing the setting values in memory, do not press the INFORMATION, TV, POWER ON/ OFF keys - it you do, the values will not be stored in memory.) (5) INFORMATION Key. When this is pressed twice, you will return to the SERVICE MENU.
2) Method of setting 2.V/C, 3. AUDIO, 4.DEF and 5.VSM PRESET.
1) 2 ~ 5 keys. Select one from 2.V/C, 3. AUDIO, 4.DEF and
5.VSM PRESET.
2) FUNCTION UP/DOWN key. Select setting items.
3) FUNCTION -/+ key. Set (adjust) the setting values of the setting items. (Use the number keys of the REMOTE CONTROL UNIT for setting of WHITE BAL­ANCE. For the setting, refer to each item concerned.)
4) MENU Key. Memorize the setting value. (Before storing the setting values in memory, do not press the INFORMATION, TV, POWER ON/ OFF key - if you do, the values will not be stored in memory.)
5) INFORMATION Key. Return to the SERVICE MENU screen.
3) Method of setting 6.VPS and 7.AUTO PROGRAM.
6. VPS. This mode displayed monitor of VPS systems. Do not adjust
7. AUTO PROGRAM. When the MAIN POWER is turned on with the state of AUTO PROGRAM ON, you get a mode that initializes every existing set value including language selection. Because this mode is set at the factory upon completion of the adjustment, you need not to use it for service. Do not adjust in this mode.
4) 8. MAX VOLUME
This mode adjusts the MAX VOLUME. (Do not adjust under normal condition). (1) 8 Key Select 8. MAX VOLUME. (2) FUNCTION -/+ Key Set (adjust) the setting values of the setting items (3) MENU Key Memorise the setting value (4) INFORMATION Key Return to the SERVICE MENU screen
(4) Release of SERVICE MENU
1) After completing the setting, return to the SERVICE MENU, then again press the INFOR­MATION key.

Electrical Adjustments

Item
B1 power supply check
Measuring instrument
Signal generator DC Voltmeter
Test point
TP-91 TP-E ( ) [X connector in MAIN PWB]
Description
1. Receive a whole black signal.
2. Connect a DC voltmeter to TP-91 and TP­E( ).
3. Make sure that the voltage is DC116.5V ±
2.0V.(AV-21TS4EK), DC149.5V ± 2.0V.(AV­25TS4EK) or DC142.5V ± 2.0V.(AV-29TS4EK)
FOCUS Adjustment Item
FOCUS Adjustment
Measuring instrument
Signal generator
Adjustment part
FOCUS VR [In HVT]
Description
1. Receive a cross-hatch signal.
2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible.
3. Make sure that when the screen is darkened, the lines remain in good focus.
IF CIRCUIT ADJUSTMENT Item
Adjustment of VCO
Measuring instrument
Remote control unit
Adjustment part
P. CW TRANSF. (TOO1) [On IF PWB]
• Do not make any adjustment unless the adjustment is out of way and you cannot get correct PICTURE.
1. Select 1.IF from the SERVICE MENU.
2. Press 1 key and select 1.VCO.
3. Select a receivable broadcast channel with the CHANNEL key.
4. Turn the core of P. CW TRANSF. until the colour of the characters TOO HIGH displayed on the screen changes from blue to..Yellow. (Step 1)
5. Turn the core of P. CW TRANSF. until the colour of the characters TOO LOW changes from blue to Yellow. (Step 2)
6. Then slowly turn back the core of P. CW TRANSF. until the colour of the characters JUST REFFERENCE changes from blue to Yellow. (Step 3)
7. Press the INFORMATION key three times to return to normal screen.
8. Perform CHANNEL PRESET again, and make sure that each broadcast is being received properly.
Item
Adjustment of DELAY POINT
Measuring instrument
Remote control unit
Adjustment part
[AGC TAKE-OVER]
1. Receive a black and white signal (colour off).
2. Select 1 IF from the SERVICE MENU.
3. Select 2.DELAY POINT by pressing the 2 key on the remote control.
4. Adjust the FUNCTION - or + key until video noise disappears.
5. Press the MENU key and memorize the set value.
6. Turn to other channels and make sure that there are no irregularities.
Setting item (Adjustment item)
DELAY POINT (AGC TAKE-OVER) Variable range: 0~63
Initial setting value: 30
Item
Setting of VSM PRESET ADJUST
Measuring instrument
Remote control unit
Adjustment part
1. BRIGHT
2. CONT.
3. COLOUR
4. SHARP
5. TINT
6. R DRIVE
7. B DRIVE
8. BASS
9.TREBLE
Description
1. Select 5.VSM PRESET from the SERVICE MENU.
2. Select COOL with the MENU key of the remote control unit.
3. Adjust the FUNCTION UP/DOWN and -/+ key to bring the set values of 1. BRIGHT ~
9.TREBLE to the values shown in the table.
4. Press the MENU key and memorize the set value.
5. Respectively select the VSM PRESET mode for NORMAL and WARM, and make similar adjustment as in 3.
6. Press the MENU key and memorize the set value.
* Refer to OPERATING INSTRUCTIONS for the
PICTURE MODE.
SETTING VALUES OF VSM PRESET
VIDEO/CHROMA CIRCUIT ADJUSTMENT 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.
Page 3
JVC AV-29TS4 EK
Adjustments Cont’d
Item
Adjustment of WHITE BALANCE (Low Light)
Measuring instrument
Signal generator Remote control unit
Adjustment part
1.CUT OFF (R) * * * (G) * * * (B) * * *
SCREEN VR [In HVT]
Description
• Set the PICTURE MODE to COOL.
1. Receive a black and white signal(colour off).
2. Select 2. V/C from the SERVICE MENU.
3. Select 1 .CUT OFF with the FUNCTION UP/ DOWN key.
4. Show one honzontal line with the 1 key. With the SCREEN VR, adjust so that the horizontal line will not be too bright.
5. Gradually turn the SCREEN VR from the left end to the right direction to bring one of the red, green or blue colour faintly visible.
6. Press 4~9 key, and bring out the other 2 colours and make one horizontal line visible in white.
7. Turn the SCREEN VR and bring one white horizontal line faintly visible.
8. Press 2 key, turn off 1.CUT OFF screen.
9.Press the MENU key and memorize the set value.
Remote Control Unit
Item
Adjustment of WHITE BALANCE (High Light)
Measuring instrument
Signal generator Remote control unit
Adjustment part
2.DRIVE
(R) * * (B) * *
Description
1. Receive a black and white signal (colour off).
2. Select 2.V/C from the SERVICE MENU.
3. Select 2.DRIVE with the FUNCTION UP/ DOWN key.
4. Change the screen colour to white with 4 key or 7 key (Drive of Red), 6 key or 9 key (Drive of Blue).
5. Press the MENU key, and memorize the set values.
Remote Control Unit
Item
Adjustment of SUB BRIGHT
Measuring instrument
Remote control unit
Adjustment part
3.BRIGHT
Description
1. Receive any broadcast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 3.BRIGHT with the FUNCTION UP/ DOWN key.
4. Set the initial setting value with the FUNC­TION -/+ key.
5. If the brightness is not the best with the initial setting value, make fine adjustment until you get the best brightness.
6. Press the MENU key and memorize the set value.
Item
Adjustment of SUB CONT.
Measuring instrument
Remote control unit
Adjustment part
4.CONT.
Description
1. Receive any broadcast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 4.CONT with the FUNCTION UP/ DOWN key.
4. Set the initial setting value with the FUNC­TION - or + key.
5. If the contrast is not the best with the initial setting value, make fine adjustment until you get the best contrast.
6. Press the MENU key and memorize the set value.
Item
Adjustment of SUB COLOUR I
Measuring instrument
Remote control unit
Adjustment part
5.COLOUR (PAL~NTSC)
Description
[Method of adjustment without using measuring instrument]
Adjustment part
PAL COLOUR
Description
(PAL COLOUR)
1. Receive PAL broadcast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 5.COLOUR with the FUNCTION UP/ DOWN key.
4. Set the initial setting value for PAL COLOUR with the FUNCTION - or + key.
5. If the colour is not the best with the initial set value, make fine adjustment until you get the best colour.
6. Press the MENU key and memorize the set value.
Adjustment part
NTSC COLOUR
Description
(NTSC 3.58 COLOUR)
1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal from the EXT terminal.
2. Make similar fine adjustment of NTSC 3.58 COLOUR in the same manner as for above.
(NTSC 4.43 COLOUR)
1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
Item
Adjustment of SUB COLOUR II
Measuring instrument
Signal generator Oscilloscope Remote control unit
Test Point
TP-47B TP-E( ) [CRT SOCKET PWB]
Adjustment part
5.COLOUR (PAL~NTSC) [Method of adjustment using measuring instrument]
Adjustment part
PAL COLOUR
Description
(PAL COLOUR)
1. Receive a PAL full field colour bar signal (75% white).
2. Select 2.V/C from the SERVICE MENU.
3. Select 5.COLOUR with the FUNCTION UP/ DOWN key.
4. Set the initial setting value of PAL COLOUR with the FUNCTION - or + key.
5. Connect the oscilloscope between TP-47B and TP-E( ).
6. Adjust PAL COLOUR and bring the value of (A) in the illustration to +5V (voltage differ­ence between white (w) and blue (B)).
7. Press the MENU key and memorize the setting value.
Voltage (W~B) +3V (AV-21TS4EK) or +2V (AV­25TS4EK/AV-29TS4EK)
Adjustment part
NTSC 3.58 COLOUR
Description
(NTSC 3.58 COLOUR)
1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar with 75% white) from the EXT terminal.
2. Set the initial setting value of NTSC 3.58 COLOUR with the FUNCTION -/+ key.
3. Adjust NTSC 3.58 COLOUR and bring the value of (A) to the values shown.
4. Press the MENU key and memorize the setting values shown.
Voltage (W~B) +5V (AV-21TS4EK) or -3V (AV­25TS4EK/AV-29TS4EK)
(NTSC 4.43 COLOUR)
1. When NTSC 3.58 is set, NTSC 4.43 will be
automatically set at the respective values.
Item
Adjustment of SUBTINT I
Measuring instrument
Remote control unit
Adjustment part
6.TINT
Description
[Method of adjustment without using measuring instrument]
Adjustment part
NTSC 3.58 TINT
Description
[NTSC 3.58 TINT
1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar with 75% white) from the EXT terminal.
2. Select 2.V/C from the SERVICE MENU.
3. Select 6. TINT with the FUNCTION UP/ DOWN key.
4. Set the initial setting value of NTSC 3.58 TINT with the FUNCTION -/+ key.
5. If you cannot get the best tint with the initial setting value, make fine adjustment until you get the best tint.
6. Press the MENU key and memorize the set value.
Adjustment part
NTSC 4.43 TINT
Description
(NTSC 4.43 TINT]
1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
Item
Adjustment of SUB TINT II
Measuring instrument
Signal generator Oscilloscope Remote control unit
Test Point
TP-47B TP-E( ) [CRT SOCKET PWB]
Adjustment part
6. TINT
Description
[Method of adjustment using measuring instrument] [NTSC 3.58 TINT]
1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar with 75% white) from the EXT terminal.
2. Select 2.V/C from the SERVICE MENU.
3. Select 6.TINT with the FUNCTION UP/DOWN key.
4. Set the initial setting value of NTSC 3.58 TINT with the FUNCTION - or + key.
5. Connect the oscilloscope between TP-47B and TP-E( ).
6. Adjust NTSC 3.58 TINT to bring the value of (A) in the illustration to +3V (voltage differ­ence between white (W) and magenta (Mg)).
7. Press the MENU key and memorize the setting values shown.
-Voltage (W~B) +2V (AV-21TS4EK) or +5V (AV-
25TS4EK/AV-29TS4EK)
Description
[NTSC 4.43 TINT]
1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
DEFLECTION CIRCUIT ADJUSTMENT
There are 5 modes of the adjustment
(1) 50Hz mode
(1) REGULAR (2) ZOOM1 (3) ZOOM2 (4)16:9
(2) 60Hz mode
(REGULAR) depending upon the kind of signals (vertical frequency 50Hz / 60Hz).
Adjustments in 50Hz REGULAR mode should always be done first. When the 50Hz REGULAR mode has been established, the setting of other modes will be done automatically. However, if the picture quality has not been optimized, adjust each mode again, respectively. 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.
Page 4
JVC AV-29TS4 EK
Adjustments Cont’d
Item
Adjustment of TRAPEZ [Except for AV­21TS4EK]
Measuring Instrument
Signal generator Remote control unit
Adjustment part
1.TRAPEZ
Description
[50Hz REGULAR mode] 1 Receive a cross-hatch signal of vertical
frequency 50Hz.
2. Select 4.DEF from the SERVICE MENU.
3. Select 1 .TRAPEZ with the FUNCTION UP/ DOWN key.
4. Set the initial setting value of TRAPEZ with the FUNCTION - or + key.
5. Adjust TRAPEZ and bring the VERTICAL lines at the right and left edges of the screen parallel.
6. Press the MENU key and memorise the set value.
Item
Adjustment of V-SHIFT
Adjustment part
2.V-SHIFT
Description
7. Receive a circle pattern signal
8. Select 2.V-SHIFT and set the initial setting value.
9. Adjust V-SHIFT to make A = B.
10.Press the MENU key and memorize the set value.
Item
Adjustment of V-SIZE
Adjustment part
3.V. SIZE
Description
11.Receive a cross-hatch signal.
12.Select 3.V-SIZE and set the initial setting value.
13.Adjust V-SIZE and make sure that the vertical screen size of the picture size is in the table.
14.Press the MENU key and memorize the set value.
Item
Adjustment of H.CENTER
Adjustment part
4.H-CENT.
Description
15.Receive a circle pattern signal.
16.Select 4.H-CENT and set the initial setting value.
17.Adjust H-CENT to make C=D.
18.Press the MENU key and memorize the set value.
Item
Adjustment of H.SIZE [Except for AV-21TS4EK]
Adjustment part
5.H-SIZE
Description
19.Receive a cross-hatch signal.
20.Select 5.H-SIZE and set the initial setting value.
21.Adjust H-SIZE and make sure that the horizontal screen size of the picture size is in the table.
22.Press the MENU key and memorize the set value.
Item
Adjustment of EW-PIN [Except for AV-21TS4EK]
Description
23.Select 6.EW-PIN and set the initial setting value
24.Adjust EW-PIN and make the 2nd vertical lines at the left and right edges of the screen straight. Also make sure that the 3rd vertical lines are straight.
25.Press the MENU key and memorize the set value.
Item
Adjustment of V-S.CR & V-EDGE
Adjustment part
7.V-S.CR
8.V-EDGE
Description
* When the vertical linearity has been deterio-
rated remarkably, perform the following steps.
26.Receive a cross-hatch signal.
27.Select 7.V-S.CR and set the initial setting value.
28.Select 8.V-EDGE and set the initial setting value.
29.Adjust both items so that the spaces of each line on TOP, CENTRE and BOTTOM become uniform.
30.Press the MENU key and memorize the set value.
Item
Adjustment of EW-COR
Adjustment part
9.EW-COR
Description
31.Select 9.EW-COR and set the initial setting value.
32.Adjust EW-COR and make the vertical lines at the four corners of the screen straight
33.Press the MENU key and memorize the set value.
34.Make sure that the adjustment is done properly on the screen of other mode.
[NOTE] When adjusting again, ajust 50Hz mode first.
Item
Adjustment of V-S.CR & V-LIN
Adjustment part
7.V-S.CR
10.V-LIN
Description
* When the vertical linearity has been deterio-
rated remarkably, perform the following steps.
26. Receive a cross-hatch signal.
27.Select 7.V-S.CR and set the initial setting value.
28.Select 10.V-LIN and set the initial setting value.
29.Adjust both items so that the spaces of each line on TOP, CENTRE and BOTTOM become uniform..
30.Press the MENU key and memorize the set value.
31.Make sure that the adjustment is done properly on the screen of other mode.
[NOTE] When adjusting again, adjust 50Hz mode first.
AUDIO CIRCUIT ADJUSTMENT
• Do not touch 3.AUDIO (1. CONC UMIT, 2. A2 ID THR) of the SERVICE MENU as it requires no adjustment.
3. AUDIO
Setting item: 1. CONC LIMIT (Do not adjust) Variable range: 00H~FFH Fixed value: 0AH
Setting item: 2.A2 ID THR (Do not adjust) Variable range: 00H~FFH Fixed value: 19H
SETTING OF MAX VOLUME
This model has a function that can set MAX VOLUME in the SERVICE MENU. (Do not adjust them under normal condition).
Item
Setting of MAX VOLUME
Measuring Instrument
Remote Control Unit
Adjustment Part
MAX VOLUME
Description
1. Select 8. MAX VOLUME from the SERVICE MENU.
2. Set the setting value with the FUNCTION -/+ key.
3. Usually, set the value to LEVEL 50.

Sub Menu Screen

Page 5
JVC AV-29TS4 EK

AV Selector & MSP PCB Diagram

Page 6
JVC AV-29TS4 EK

CRT Diagram (21”)

Page 7
JVC AV-29TS4 EK

CRT Diagram (25”/29”)

Page 8
JVC AV-29TS4 EK

Front Control Diagram (21”)

Page 9
JVC AV-29TS4 EK

Front Control Diagram (25”/29”)

Page 10
JVC AV-29TS4 EK

Main PCB Diagram

Page 11
JVC AV-29TS4 EK

Power Deflection Diagram (21”)

Page 12
JVC AV-29TS4 EK

Power Deflection Diagram (25”/29”)

Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use