JVC AV-21P8 Service Manual

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Page 1

SERVICE MANUAL

COLOUR TELEVISION

BASIC CHASSIS

CM-F

AV-21P8(PH)

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

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-PH

No. 56097 1

No. 56097 Sep. 2000

Page 2

AV-21P8

PARTS DIFFERENCE TABLE

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

! REF. NO. PART NAME DESCRIPTION

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

■ EXPLODED VIEW PARTS LIST (Page 32)

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

! 13 QMP40D0-200J5 QMPR010-200-E2 POWER CORD

or QMP40D0-200J3 or QMPR010-200-K2

! 17 LC10551-002A-H LC10551-002A-HK REAR COVER ! 18 LC20377-010B-H GG20003-007A-H RATING LABEL

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

— SCM-1613A-H2 SCM-1620A-H2 MAIN PWB ASSY

■ PACKING PARTS LIST (Page 43)

1 GG10044-007A-H GG10077-002A PACKING CASE

! 6 LCT0735-001A-H LCT0742-001A-H INST BOOK

7 CM47385-00B-H CP30902-048(R) POS/SERIAL LABEL

! 8 LCT0736-001A-H DIGEST MANUAL ! 9 LCT0737-001A-H DIGEST MANUAL

No. 560972

Page 3

SPECIFICATIONS (Page 2)

Item Content

Dimensions (W × H × D) 596mm × 468.5mm × 481.5mm Mass 25kg TV RF System B / G, I, 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 32.0MHz (6.0MHz)

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 89W 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)

AV-21P8

Design & specifications are subject to change without notice.

No. 56097 3

Page 4

AV-21P8

SPECIFIC SERVICE INSTRUCTIONS

SETTING OF SYSTEM CONSTANT SET (Page 7)

Table 1

Setting item Setting contents Setting value

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/R/A/F

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

ENGLISH

No. 560974

Page 5

SERVICE ADJUSTMENTS

■ Initial Setting Value

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

AV-21P8

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. 56097 5

Page 6

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

+15 0 −4

b −3

: Do not adjust.

No. 560976

Page 7

■ 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.

AV-21P8

No. 56097 7

Page 8

AV-21P8

VICTOR COMPANY OF JAPAN, LIMITED

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

No. 560978

AV21P8PH-SK #3

CTH 0009 CRT