JVC AV-21P8(VT) Service Manual

Page 1

SERVICE MANUAL

COLOUR TELEVISION

BASIC CHASSIS

CM-F

AV-21P8(VT)

This service manual mainly consists of the following items:

• The items which differ from those for the AV-21PX service manual.

• The initial value for each setting item. For details other than those described in this manual, please refer to the following service manual. Reference Service Manual: AV-21PX Service Manual (No. 56039, Jul. 2000)

AV-21P8

AV-21P8

Note: The page in parentheses shows the one for the AV-21PX service manual (No. 56039, Jul. 2000).

HOW TO IDENTIFY MODEL

While referring to the illustration given below, identify model name on the rating label affixed to the rear cover.

Basic model name

AV-21P8

MODEL NO.

XXXXX XXXXXXX XXXXXXX XXXXX

XXXXXX

XXXXX

XXX XXXXX XXXXX

XXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXX

SERIAL No.

XXXX XX XXXX XXX XX XXXX

XXXXXX–XXX

Identify model name

AV-21P8-VT

COPYRIGHT  2000 VICTOR COMPANY OF JAPAN, LTD.

No. 56096 1

No. 56096

Jul. 2000

Page 2

AV-21P8

PARTS DIFFERENCE TABLE

The different parts between AV-21PX and AV-21P8(VT) are described below:

!!

! REF. NO. PART NAME DESCRIPTION

!!

AV-21PX AV-21P8(VT) PART No. PART No.

■ EXPLODED VIEW PARTS LIST (Page 32)

! L01 QQW0058-001 QQW0067-001 DEG COIL

1 LC10549-012A-H LC10549-011A-HK FRONT CABI ASSY

! 17 LC10551-002A-H LC10551-002A-HK REAR COVER ! 18 LC20377-010B-H GG20001-017A-H RATING LABEL

■ PRINTED WIRING BOARD PARTS LIST [MAIN PWB ASSY] (Page 34-)

— SCM-1613A-H2 SCM-1618A-CK MAIN PWB ASSY

C1972 QEHR1AM-108Z E CAP. 1000µF 10V M

QETM1CM-108 E CAP. 1000µF 16V M

C1974 QEHR1CM-107Z E CAP. 100µF 16V M

QFN31HJ-222 M CAP. 2200pF 50V J D1553 RH1S-T3 RH1S-LFA1 SI DIODE D1554 RH1S-T3 RH1S-LFA1 SI DIODE IC1701 M37204MC-D47SP M37204MC-E40SP IC (MICROCOMPUTER) IC1702 AT24C08-AV21PS AT24C08-21P8VT IC (MEMORY) (Service)

■ PRINTED WIRING BOARD PARTS LIST [INNER PIN PWB ASSY] (Page 37)

— SCM-2102A-H2 SCM-2104A-CK INNER PIN PWB ASSY

■ PRINTED WIRING BOARD PARTS LIST [CRT SOCKET PWB ASSY] (Page 37-)

— SCM-3302A-H2 SCM-3304A-CK CRT SOCKET PWB ASSY D3302 RH1S-T3 RH1S-LFA1 SI DIODE SI DIODE D3303 RH1S-T3 RH1S-LFA1 SI DIODE SI DIODE

■ PRINTED WIRING BOARD PARTS LIST [FRONT CONTROL PWB ASSY] (Page 39)

— SCM-8302A-H2 SCM-8306A-CK FRONT CONTROL PWB

ASSY

■ PRINTED WIRING BOARD PARTS LIST [ALC PWB ASSY] (Page 39)

— SCM0A105A-H2 SCM0A106A-CK ALC PWB ASSY

■ PRINTED WIRING BOARD PARTS LIST [IF PWB ASSY] (Page 40-)

— SCM0F302A-H2 SCM0F303A-CK IF PWB ASSY R0609 NRSA02J-471X CHIP RESISTOR C0609 NCB21HK-103X CHIP C CAPACITOR Q0101 2SC5083/L-P/-T 2SC5082/L-P/ SI TRANSISTOR Q0603 DTC124EKA-X DIGI TRANSISTOR CF0606 QAX0337-001 CERAMIC FILTER

No. 560962

Page 3

AV-21P8

!!

! REF. NO. PART NAME DESCRIPTION

!!

AV-21PX AV-21P8(VT) PART No. PART No.

■ PRINTED WIRING BOARD PARTS LIST [AV SW PWB ASSY] (Page 41-)

— SCM0Y502A-H2 SCM0Y503A-CK AV SW PWB ASSY

C0302 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0311 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0312 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0401 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0404 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0406 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0423 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0424 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0428 QENC1EM-106Z BP E CAP. 10µF 25V M

QENB1CM-106 BP E CAP. 10µF 16V M

C0627 QETN1EM-476Z E CAP. 47µF 25V M

QETM1CM-476 E CAP. 47µF 16V M

■ PACKING PARTS LIST (Page 43)

1 GG10044-007A-H GG10078-001A PACKING CASE

! 6 LCT0735-001A-H LCT0741-001A INST BOOK

7 CM47385-00B-H CM43936-001 POS/SERIAL LABEL

! 8 LCT0736-001A-H DIGEST MANUAL

! 9 LCT0737-001A-H DIGEST MANUAL

— CM35847-00A-H ROD ANTENNA ASSY — CEAB005-00AJ1 MATCHING BOX

No. 56096 3

Page 4

AV-21P8

SPECIFICATIONS (Page 2)

Item Content

Dimensions (W × H × D) 596mm × 468.5mm × 481.5mm Mass 25kg TV RF System B / G, D / K, K1, M Colour System TV Mode PAL / SECAM / NTSC3.58 / NTSC4.43

VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43

Receiving Frequency VHF (VL) 46.25MHz ~ 168.25MHz

VHF (VH) 175.25MHz ~ 463.25MHz UHF 471.25MHz ~ 863.25MHz CATV ● Cable TVs of Mid (X-Z, S1-S10)

Super (S11-S20) & Hyper (S21-S41) bands receivable

Intermediate VIF Carrier 38.0MHz Frequency 31.5MHz (6.5MHz)

SIF Carrier 32.5MHz (5.5MHz)

33.5MHz (4.5MHz)

Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.40625MHz / 4.25MHz)

NTSC (3.58MHz / 4.43MHz)

Aerial Input Terminal 75Ω Unbalanced Power Input Rating: AC110 ~ 240V, 50/60Hz Operating: AC90 ~ 260V, 50/60Hz Power Consumption 135W (Max.) / 89W (Avg.) Picture Tube Visible size : 51cm measured diagonally High Voltage 29kV +1/−1.5kV (at zero beam current) Speaker 5 × 12cm Oval type × 2 Audio Output 5W + 5W Input (S/Video-1, Video 1Vp-p, 75Ω

Video-2 & -3, Audio) S/Video Y: 1Vp-p Positive (negative sync provided, when terminated with 75Ω)

C: 0.286Vp-p (burst signal, when terminated with 75Ω)

Audio (L/R) 500mVrms (−4dBs), High impedance

Output Video 1Vp-p, 75Ω

Audio (L/R) 500mVrms (–4dBs), Low impedance

Headphone Jack Stereo mini jack (3.5ø) Remote Control Unit RM-C235-1C (Battery size : AA/R06/UM-3 × 2)

Design & specifications are subject to change without notice.

No. 560964

Page 5

SPECIFIC SERVICE INSTRUCTIONS

SETTING OF SYSTEM CONSTANT SET (Page 7)

Table 1

Setting item Setting contents Setting value

AV-21P8

1. COLOUR AUTO NO

2. COLOUR MULTI

3. ECO SENSOR YES

4. BASS NO-SB-ON

5. VOL. LIMITER YES

6. TEXT NO

7. MSP NO

8. LANGUAGE E/V

9. EW-PIN IC YES

10. B/B OFF MUTE OFF

11. LED 3

12. D/K NICAM NO

13. ALC YES

14. BBE NO

15. E.M.C. NO

YES NO MULTI. TRIPLE PAL YES NO YES-BB YES-BB-SB YES-SB

NO-SB-OFF NO-SB-ON YES-BA

YES NO YES NO YES NO NO-A2 E/V E YES NO ON OFF 23 YES NO YES NO YES NO YES NO

USER SETTING VALUES (Page 7)

Table 2

Setting item Setting value Setting item Setting value

SUB POWER ON BASS CENTER CHANNEL POSITION 1 POSITION BALANCE CENTER

CHANNEL PRESET LANGUAGE

VOLUME Appropriate sound volume AUTO VNR OFF TV/VIDEO TV OFF TIMER OFF ON SCREEN DISPLAY POSITION NUMBER DISPLAY AUTO SHUTOFF OFF COLOUR SYSTEM AUTO PAL ECO SENSOR OFF SOUND SYSTEM B / G AI VOLUME HIGH PICTURE MODE (VSM) BRIGHT BLUE BACK OFF LIVE SPATIAL OFF ON TIMER PR1 0:00 TREBLE CENTER CHILD LOCK OFF

Refer to OPERATING INSTRUCTION

VIETNAMESE

No. 56096 5

Page 6

AV-21P8

SERVICE ADJUSTMENTS

■ Initial Setting Value

■ IF CIRCUIT ADJUSTMENT -- Adjustment of DELAY POINT (Page 15)

Setting (Adjustment) item

DELAY POINT (AGC TAKE-OVER)

Variable Initial setting range value

0 ~ 63 19

■ V/C (VIDEO/CHROMA) CIRCUIT ADJUSTMENT (Page 15)

[SUB MENU 2. V/C]

Colour system Variable Initial setting value

Setting item range PAL SECAM NTSC 3.58 NTSC 4.43

1. CUT OFF (R / G / B) −128 ~ +127 0 bbb

2. DRIVE (R / B) −128 ~ +127 0 bbb

3. BRIGHT (RF/VIDEO) −128 ~ +127 0 / 0 +2 / −1 0 / −2

4. CONT. (RF/VIDEO) −42 ~ +42 0 / −6 −7 / −8 −8 / −7

5. COLOUR −60 ~ +68 +11 +3 +15 0

6. TINT (TV / VIDEO) −64 ~ +63 +12 / 0 0 / −4

7. BLACK OFFSET (R-Y / B-Y) −8 ~ +7 +4 / +2

8. SHARP (TV / VIDEO) −32 ~ +31 −15 / 0 b −20 / 0

9. TEXT (RGB) CONT. −128 ~ +77 +10 bbb

10. B.S.OFF 0 ~ +1 0 bbb

11. B.S.POINT 0 ~ +7 +6 bbb

12. DC TRAN RATE 0 ~ +7 0 bbb

13. APA-CON FO/SW 0 ~ +3 +1 bbb

14. VSM PHASE 0 ~ +3 +3 bbb

15. VSM GAIN 0 ~ +3 +1 bbb

16. CLL SW 0 ~ +1 +1 bbb

17. CLL LEVEL 0 ~ +3 +2 bbb

18. ABL POINT 0 ~ +7 +5 bbb

19. ABL GAIN 0 ~ +7 +1 bbb

20. Y-DL (TV / VIDEO / S) 0 ~ +7 +2 / +4 / +2 +3 / +3 / +2 +2 / +2 / +2 +4 / +4 / +2

21. P.ACL SW 0 ~ +1 +1 bbb

22. WPL SW 0 ~ +1 0 bbb

23. Y GAMMA 0 ~ +1 0 bbb

: Do not adjust.

No. 560966

Page 7

AV-21P8

Adjustment of SUB COLOUR-II (Page 18)

Adjustment part Description

5. COLOUR

PAL COLOUR Value (A) in the figure: Set to +4V (W & G).

SECAM COLOUR Value (A) in the figure: Set to +3V (W & G).

NTSC 3.58 COLOUR Value (A) in the figure: Set to +4V (W & G).

Adjustment of SUB TINT-II (Page 19)

Adjustment part Description

6. TINT

NTSC 3.58 TINT Value (B) in the figure: Set to +3V (W & Cy).

■ DEFLECTION CIRCUIT ADJUSTMENT (Page 21)

[SUB MENU 4. DEF]

Setting item Adjustment name Variable range

1. TRAPEZ Trapezoidal distortion correction −32 ~ +31 −15 −3

2. V-SHIFT Vertical center −32 ~ +31 −19 +12

3. V-SIZE Vertical height −64 ~ +63 +12 0

4. H-CENT Horizontal center −16 ~ +15 −6 0

5. H-SIZE Horizontal width −64 ~ +63 +6 0

6. EW-PIN Side pin correction −64 ~ +63 −10 0

7. V-S. CR Vertical height correction −64 ~ +63 0 +2

8. V-EDGE Vertical edge correction −64 ~ +63 +3 +2

9. EW-COR Side pin fore correction −64 ~ +63 −1 −1

10. V-LINE Vertical linearity −16 ~ +15 0 +2

11. H-COMP Horizontal compensation 0 ~ +15 +3 0

Initial setting value

50Hz 60Hz

: Do not adjust.

■ VSM PRESET ADJUSTMENT (Page 25)

[Setting Values for SUB MENU 5. VSM PRESET]

VSM preset VSM mode BRIGHT STANDARD SOFT Setting item

1. TINT

SETTING VALUE

2. COLOUR

SETTING VALUE

3. BRIGHT

SETTING VALUE

4. CONT.

SETTING VALUE

5. SHARP

SETTING VALUE

0

0

0

+15 0 −4

0

bb

b

bb

bb

b

bb

bb

b

bb

bb

b −3

bb

bb

b

bb

bb

b

bb

bb

b

bb

: Do not adjust.

No. 56096 7

Page 8

AV-21P8

■ CENTER ADJUSTMENT (Page 25)

[SUB MENU 6. CENTER]

Setting item Initial setting value (fixed)

TREBLE (Do not adjust.) +2 BASS (Do not adjust.) +3

: Do not adjust.

VICTOR COMPANY OF JAPAN, LIMITED

TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan

No. 560968

AV21P8VT-CK #3

CTH 0009 CRT

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