JVC AV-2108TEE/B, AV-2508TEE/B, AV-2908TEE/B, AV-3408TEE/B Service Manual

AV-2108TEE AV-2908TEE AV-2508TEE AV-3408TEE

SERVICE MANUAL

COLOUR TELEVISION

BASIC CHASSIS

AV-2108TEE AV-2508TEE

POWER

DISPLAY

CHANNEL VOLUME

SYSTEM

SOUND MUTING

COLOUR

TV/VIDEO

123

456

PICTURE MODE

7809

RETURN

CHANNEL SCAN

-/--

OFF TIMER

TV/TEXT

ECO SENSOR

TEXT

REVEAL HOLD INDEX STORE

MODE SIZE SUBPAGE CANCEL

RM-C355 REMOTE CONTROL UNIT

RM-C355-1C

AV-2908TEE AV-3408TEE

Regarding service information other than these sections, refer to the AV-2108TEE service manual (No. 51849), AV-2508TEE service manual (No. 51848), AV-2908TEE service manual (No. 51839) and AV-3408TEE service manual (No.51854). Also, be sure to note important safety precautions provided in the service manual.

No. 51901 Sep. 2001

AV-2108TEE AV-2908TEE AV-2508TEE AV-3408TEE

a SPECIFIC SERVICE INSTRUCTIONS [AV-2108TEE/B] ......................................................................... 3

a SERVICE ADJUSTMENTS [AV-2108TEE/B] .......................................................................................... 4

a PARTS LIST [AV-2108TEE/B] ................................................................................................................ 9

a SPECIFIC SERVICE INSTRUCTIONS [AV-2508TEE/B] ....................................................................... 18

a SERVICE ADJUSTMENTS [AV-2508TEE/B] ........................................................................................ 19

a PARTS LIST [AV-2508TEE/B] ............................................................................................................... 24

a SPECIFIC SERVICE INSTRUCTIONS [AV-2908TEE/B] ....................................................................... 30

a SERVICE ADJUSTMENTS [AV-2908TEE/B] ........................................................................................ 31

a PATTERN DIAGRAMS [AV-2908TEE/B] ............................................................................................... 38

a PARTS LIST [AV-2908TEE/B] ............................................................................................................... 40

a SPECIFIC SERVICE INSTRUCTIONS [AV-3408TEE/B] ....................................................................... 49

a SERVICE ADJUSTMENTS [AV-3408TEE/B] ........................................................................................ 50

a PATTERN DIAGRAMS [AV-3408TEE/B] ............................................................................................... 53

a PARTS LIST [AV-3408TEE/B] ............................................................................................................... 54

2 No. 51901

AV-2108TEE

SPECIFIC SERVICE INSTRUCTIONS [AV-2108TEE/B]

SETTING OF SYSTEM CONSTANT SET

Setting item Setting content

AV-21LS AV-21LS-AU AV-21LXAV-21LH AV-2108TEE AV-2108TEE/BAV-21X-A

Setting value

SYSTEM

COMB

TILT

TEXT

SUPER BASS

LANGUAGE

MSP

BILINGUAL

B/B SOUND

TUNER

COLOUR AUTO

LOCK 1MHz

MULTI TRIPLE

YES NO

E/R/C E/R/A/F

E/F E/A

E/R E/C E/A/F

YES NO

MU MA

YES NO

000 024

MULTI

ARABIC

E/R/C

YES

020(040)

PAN EURO NO

E/C E/R/A/F E/R

020

YES

RUSSIAN UKRANIAN

020(040)

(040)

AV-2108TEE

500KHz

250KHz

156.25KHz

31.25KHz

NOTE : (

000 024

) is for Micon (IC1701) Part No. TDA9365N13S0518.

***

020(040)

015(030)

Table 1

020

015

020(040)

015(030)

(040)

(030)

No. 51901 3

AV-2108TEE

SERVICE ADJUSTMENTS [AV-2108TEE/B]

VC (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.

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 Variable range

Initial setting value

PAL SECAM NTSC3.58 NTSC4.43 COMPONENT

1 CUTOFF(R/G) –7 — +8 0

2 DRIVE(R/G/B) –30 — +31 0

3 BRIGHT(COM./TV/V-1/V-2/V-3) –30 — +31 0/–18/0/0/0

4 CONT –30 — +31 –20 —

5 COLOUR –30 — +31 –5 –3 –12 –2 +10

6 TINT (TV/VIDEO) –30 — +31 — — –15/+4 +1/+1 —

7 SHARP (TV/VIDEO) –30 — +31 –16/–2 –/0

8 YDELAY (TV/VIDEO/S) –8 — +7 0/+1/0 +5/+1/+1 0/+1/+1 +5/0/+1 —

Item

Adjustment of WHITE

Measuring instrument

Signal generator

Test point Adjustment part Description

1. CUTOFF (R) CUTOFF (G)

Note:

• Set PICTURE MODE (VSM) to “BRIGHT”.

BALANCE (Low light)

Remote control unit

SCREEN VR [In HVT]

1. Receive a PAL black and white signal (colour 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

V/C

1. CUTOFF

50 Hz

MENU 89: SELECT

(R) (G)

/+ : OPERATE

PAL

** **

DISPLAY : EXIT

the remote control unit.

4. Press the 1 key on the remote control unit to produce a single hori- zontal line.

5. Turn the SCREEN VR fully counterclockwise, then slowly turn it clockwise to where a red, blue or green colour is faintly visible.

6. Use the keys 4 and 7 or 5 and 8 on the remote control unit and adjust the other 2 colours 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) Variable Initial setting

Item range value

1. CUT OFF

R –7 — +8 0

G –7 — +8 0

H.LINE OFF

H.LINE ON

R. CUTOFF (

REMOTE CONTROL UNIT

12 3

)

G. CUTOFF (8)

789

R. CUTOFF (

)

G.CUTOFF (

)

4 No. 51901

AV-2108TEE

Item

Adjustment of SUB COLOUR-I

Measuring

instrument

Remote control unit

Test point Adjustment part Description

5. COLOUR

[Method of adjustment without measuring instrument]

Notes:

• Proceed to the following this adjustment after having completed the adjustment of SUB CONT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

– PAL COLOUR –

1. Receive a PAL broadcast.

2. Select 2. VC from the SERVICE MENU.

3. Select 5. COLOUR with the MENU &/^ key.

4. Set the initial setting value for PAL COLOUR with the MENU –/+ key.

5. If the colour is not best with the initial setting value, make fine ad-

justment until you get the best colour.

6. Press the DISPLAY key twice to return to the normal screen.

– SECAM COLOUR –

7. Receive a SECAM broadcast.

8. Press the COLOUR SYSTEM button on the remote control unit to

select the SECAM colour system.

9. Make fine adjustment of SECAM COLOUR in the same way as for

“PAL COLOUR”.

– NTSC 3.58 COLOUR –

10. Receive a NTSC 3.58MHz broadcast.

11. Press the COLOUR SYSTEM button on the remote control unit to

select the NTSC 3.58 colour system.

12. Make similar fine adjustment of NTSC 3.58 COLOUR in the same

way as for “PAL COLOUR”.

– NTSC 4.43 COLOUR –

When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR.

AV-2108TEE

Adjustment of SUB COLOUR-II

Signal generator

Oscilloscope

Remote control unit

TP-47G TP-E (H) [CRT SOCKET PWB]

5. COLOUR [Method of adjustment using measuring instrument]

Notes:

• Proceed to the following this adjustment after having completed the adjustment of SUB CONT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

– PAL COLOUR –

1. Receive a PAL colour bar signal (full field colour bar 75% white).

2. Select 2. VC from the SERVICE MENU.

3. Select 5. COLOUR with the MENU &/^ key.

4. Set the initial setting value of PAL COLOUR with the MENU –/+ key.

5. Connect the oscilloscope between TP-47G and TP-E.

(A)

(–) 0V (+)

Adjust PAL COLOUR to set the value (A) in the figure to +14V (V

W-G

– SECAM COLOUR –

7. Receive a SECAM colour bar signal (full field colour bar 75% white).

8. Press the COLOUR SYSTEM button on the remote control unit to

select the SECAM colour system.

9. Set the initial setting value of SECAM COLOUR with the MENU –/+ key.

10. Adjust SECAM COLOUR to set the value (A) in the figure to +5V

(VW-G ).

– NTSC 3.58 COLOUR –

11. Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white).

12. Press the COLOUR SYSTEM button on the remote control unit to

select the NTSC 3.58 colour system.

13. Set the initial setting value of NTSC 3.58 COLOUR with the MENU

–/+ key.

14. Adjust NTSC 3.58 COLOUR to set the value (A) in the figure to

+5V (VW-G).

– NTSC 4.43 COLOUR –

When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR.

No. 51901 5

AV-2108TEE

Item

Adjustment of SUB TINT-I

Measuring instrument

Remote control unit

Test point Adjustment part Description

6. TINT [Method of adjustment without measuring instrument]

Notes:

• Proceed to the following this adjustment after having completed the adjustment of SUB CONT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

– NTSC 3.58 TINT –

1. Receive a NTSC 3.58 colour bar signal (full field colour bar 75%

white).

2. Press the COLOUR SYSTEM button on the remote control unit to

select the NTSC 3.58 colour system.

3. Select 2. VC from the SERVICE MENU.

4. Select 6. TINT with the MENU &/^ key.

5. Set the initial setting value of NTSC 3.58 with the MENU –/+ key.

6. If you cannot get the best tint with the initial setting value, make fine

adjustment until you get the best tint.

7. Press the DISPLAY key twice to return to the normal screen.

– NTSC 4.43 TINT –

When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT.

Adjustment of SUB SUB TINT-II

Signal generator

Oscilloscope

Remote control unit

(B)

TP-47G TP-E (H) [CRT SOCKET PWB]

6. TINT [Method of adjustment using measuring instrument]

Notes:

• Proceed to the following this adjustment after having completed the adjustment of SUB CONT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

– NTSC 3.58 TINT –

1. Receive a NTSC 3.58 colour bar signal (full field colour bar 75%

white).

2. Press the COLOUR SYSTEM button on the remote control unit to

select the NTSC 3.58 colour system.

3. Select 2. VC from the SERVICE MENU.

4. Select 6. TINT with the MENU &/^ key.

5. Set the initial setting value of NTSC 3.58 with the MENU –/+ key.

6. Connect the oscilloscope between TP-47G and TP-E.

(–) 0V (+)

7. Adjust NTSC 3.58 TINT to set the value (B) in the figure to +6V

(VW-Cy).

8. Press the DISPLAY key twice to return to the normal screen.

– NTSC 4.43 TINT –

When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT.

6 No. 51901

AV-2108TEE

DEFLECTION CIRCUIT ADJUSTMENT

Note:

Proceed to the following this adjustment after having completed the adjustments of SUB BRIGHT and SUB CONT.

[SUB MENU 3. DEF] : Do not adjust.

Setting

(Adjustment)

item

Variable range

50Hz 60Hz

4:3

1. VER. SLOPE –31 — +31 +6 –1 —— —

2. VER. HEIGHT –31 — +31 +31 +31 –9 –30 —

3. VER. POSITION –31 — +31 –9+1—— —

4. VER. SCURVE –31 — +31 –21 –2 —— —

5. HOR. POSITION –31 — +31 +5 +6 —— +7

6. HOR. WIDTH –31 — +31 0 0 —— —

7. EW-PIN –31 — +31 0 0 0 0 —

8. EW-TRAPEZ –31 — +31 0 0 —— —

9. UP CORNER –31 — +31 0 0 0 0 —

10. DW CORNER –31 — +31 0 0 0 0 —

11. HOR. PARALL –31 — +31 –11 0 —— —

12. HOR. BOW –31 — +31 0 0 —— —

13. V.ZOOM –31 — +31 –1 –3 +11 +14 —

Initial setting value

COMPRESS(16:9)

50Hz 60Hz

COMPONENT

DVD(50Hz/60Hz)

AV-2108TEE

[fv : 50Hz mode]

Item

Adjustment of VER. SLOPE

Adjustment of VER.POSITION

Measuring

instrument

Signal generator

Remote control unit

Signal generator

Remote control unit

Test point Adjustment part Description

1. VER. SLOPE 1. Receive a PAL circle pattern signal of vertical frequency 50Hz.

2. Select 3. DEF from the SERVICE MENU.

3. Select 1. VER. SLOPE with the MENU &/^ key.

4. 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.

Blanking line

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.

(to be continued)

No. 51901 7

AV-2108TEE

PRESET ADJUSTMENT

Do not adjust 5. PRESET in the SERVICE MENU as it requires no adjustment.

•

[SUB MENU 5. PRESET]

Setting item Variable range Initial setting value

1 CB 0/1 0 2 ACL 0/1 0 3 MUS 0/1 0 4 MAT 0/1 0 5 FCO 0/1 0 6 BPS 0/1 0 7 IFLH 0/1 0 8 VID 0/1 0 9 STM 0/1 0 10 AFCW 0/1 0 11 VSW 0/1 0 12 FFI 0/1 0 13 AGC 00/10/01 10 14 CL 50 – 95 80 15 AKB 0/1 0 16 HBL 0/1 0 17 BKS 0/1 1 18 READ STATUS —— 19 VNR 00 – 63 25

8 No. 51901

AV-2508TEE

SPECIFIC SERVICE INSTRUCTIONS [AV-2508TEE/B]

SETTING OF SYSTEM CONSTANT SET

Setting item Setting content

SYSTEM

COMB

TILT

TEXT

SUPER BASS

LANGUAGE

MSP

BILINGUAL

B/B SOUND

TUNER

MULTI TRIPLE

YES NO

E/R/C E/R/A/F

E/F E/A

E/R E/C E/A/F

YES NO

MU MA

AV-25LS AV-25LS-AU

MULTI

ARABIC

E/R/C

PAN EURO NO

YES

Setting value

AV-25LH AV-25LX-AU AV-2508TEE AV-2508TEE/BAV-25X-A

AV-25LX

E/C E/R/A/F E/R/C E/R

YES NO

RUSSIAN UKRANIAN

COLOUR AUTO

LOCK 1MHz

500KHz

250KHz

156.25KHz

31.25KHz

NOTE : (

***

YES NO

000 024

) is for Micon (IC1701) Part No. TDA9365N13S0518.

020(040)

015(030)

Table 1

020

015

YES NO

020(040)

015(030)

(040)

(030)

18 No. 51901

+ 19 hidden pages

JVC AV-2108TEE/B, AV-2508TEE/B, AV-2908TEE/B, AV-3408TEE/B Service Manual

CONTENTS

SPECIFIC SERVICE INSTRUCTIONS [AV-2108TEE/B]

SERVICE ADJUSTMENTS [AV-2108TEE/B]

SPECIFIC SERVICE INSTRUCTIONS [AV-2508TEE/B]