AV-21ATG
AV-21ATG
SERVICE MANUAL
COLOUR TELEVISION
BASIC CHASSIS
CG
AV-21ATG(-A)
This service manual mainly consists of the following items:
• The items which differ from those for the AV-21AT 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-21AT Service Manual (No. 56013, May 2000)
Note: The page in parentheses shows the one for the AV-21AT service manual (No. 56013, May 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-21ATG
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-21ATG-A
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
No. 56015 1
No. 56015
May 2000
AV-21ATG
PARTS DIFFERENCE TABLE
The different parts between AV-21AT and AV-21ATG(-A) are described below:
!!
! REF. NO. PART NAME DESCRIPTION
!!
AV-21AT AV-21ATG(-A)
PART No. PART No.
■ EXPLODED VIEW PARTS LIST (Page 28)
! 15 LC20377-010A-H LC20413-002A-H RATING LABEL
! 18 QMP40D0-200J5 QMPR010-200-E2 POWER CORD
or QMP40D0-200J3 or QMPR010-200-K2
■ PRINTED WIRING BOARD PARTS LIST (Page 30)
— SCG-1247A-H2 SCG-1244A-H2 MAIN PWB ASSY
IC1701 MN1873287JA MN1873287JB IC (MICROCOMPUTER)
IC1702 AT24C08-21FTR AT24C08-21FM IC (MEMORY) (Service)
■ PACKING PARTS LIST (Page 34)
1 GG10056-017A-H GG10056-018A-H PACKING CASE
! 7 LCT0748-001A-H LCT0728-001A-H INST BOOK
! 8 LCT0749-001A-H LCT0750-001A-H DIGEST MANUAL
! — QAM0055-001 CONVERSION PLUG
No. 560152
SPECIFICATIONS (Page 2)
Item Content
Dimensions (W × H × D) 502mm × 451mm × 480.5mm
Mass 19.5kg
TV RF System B / G, I, D / K, K1
Colour System TV Mode PAL / SECAM
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 AC110 ~ 240V, 50 / 60Hz
Power Consumption 105W (Max.)/68W (Avg.)
Picture Tube Visible size : 51cm measured diagonally
High Voltage 26.5kV ± 1.5kV (at zero beam current)
Speaker 5cm × 9 cm Oval type × 2
Audio Output 5W (Monaural)
Input Video 1Vp-p, 75Ω
Audio 500mVrms (−4dBs), High impedance
Output Video 1Vp-p, 75Ω
Audio 500mVrms (–4dBs), Low impedance
Headphone Jack Stereo mini jack (3.5ø)
Remote Control Unit RM-C364-1H (Battery size : AA/R06/UM-3 × 2)
AV-21ATG
Design & specifications are subject to change without notice.
No. 56015 3
AV-21ATG
SPECIFIC SERVICE INSTRUCTIONS
SETTING OF SYSTEM CONSTANT SET (Page 7)
Table 1
Setting item Setting contents Setting value
COLOUR TRIPLE
BILINGUAL NO
TUNER MU
ECO SENSOR YES
LANGUAGE E/R/A/F
B/B SOUND ON
LOCK 180
COLOUR AUTO YES
QSS MINT
ALC NO
TEXT RATE 20
AMP TUNER NO
MULTI. TRIPLE PAL
YES NO
MU MA
YES NO
E/R/A/F E/A/F E/A E/F
ON OFF
YES 10 20 ... 230
250 240
YES NO
MINT MQSS
YES NO
10 20 40 80
YES NO
USER SETTING VALUES (Page 7)
Table 2
Setting item Setting value Setting item Setting value
SUB POWER ON PICTURE MODE (VSM) BRIGHT
CHANNEL POSITION 1 POSITION VNR OFF
CHANNEL PRESET
VOLUME Appropriate sound volume AUTO SHUTOFF OFF
TV/VIDEO TV ECO SENSOR OFF
ON SCREEN DISPLAY POSITION NUMBER DISPLAY BLUE BACK OFF
COLOUR SYSTEM AUTO PAL ON TIMER PR1 0:00
SOUND SYSTEM B / G CHILD LOCK OFF
Refer to OPERATING
INSTRUCTION
OFF TIMER OFF
LANGUAGE ENGLISH
No. 560154
SERVICE ADJUSTMENTS
■ Initial Setting Value
■ IF CIRCUIT ADJUSTMENT -- Adjustment of DELAY POINT (Page 15)
AV-21ATG
Setting (Adjustment) Item
DELAY POINT
(AGC TAKE-OVER)
Variable Initial setting
range value
0 ~ 127 43
■ 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 −50 bbb
2. DRIVE (R / B) −64 ~ +63 0 bbb
3. BRIGHT −128 ~ +127 0 bbb
4. CONT. −64 ~ +63 0 bbb
5. COLOUR (P / S / N3 / N4) −64 ~ +63 0 bbb
6. TINT (N3 / N4) TV / VIDEO −64 ~ +63 0 / 0 0 / 0
7. SECAM BL ADJUST −32 ~ +31 0 bbb
8. SHARP TV / VIDEO −32 ~ +31 −5 / +15 bbb
: Do not adjust.
Adjustment of SUB COLOUR-II (Page 18)
Adjustment part Description
5. COLOUR
PAL COLOUR Value (A) in the figure: Set to +12V (W & G).
SECAM COLOUR Value (A) in the figure: Set to +9V (W & G).
NTSC 3.58 COLOUR Value (A) in the figure: Set to +7V (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 +7V (W & Cy).
No. 56015 5
AV-21ATG
■ DEFLECTION CIRCUIT ADJUSTMENT (Page 20)
[SUB MENU 4. DEF]
Setting item Adjustment name Variable range
1. VER. POSITION Vertical center −4 ~ +3 −1 −3
2. HOR. POSITION Horizontal center −16 ~ +15 +3 +3
3. VER. HEIGHT Vertical height −64 ~ +63 −35 +1
4. VER. LINEARITY Vertical linearity −32 ~ +31 +15 −1
5. VER. SCURVE Vertical scurve −32 ~ +31 −32 0
6. HOR. VCO ADJUST Horizontal VCO −64 ~ +63 0 0
: Do not adjust.
Initial setting value
50Hz 60Hz
■ VSM PRESET ADJUSTMENT (Page 22)
[Setting Values for SUB MENU 4. VSM PRESET]
VSM preset
VSM mode BRIGHT STANDARD SOFT
Setting item
TINT
SETTING VALUE
COLOUR
SETTING VALUE
BRIGHT
SETTING VALUE
CONT.
SETTING VALUE
SHARP
SETTING VALUE
+15
+15
+15
+30 +15 +11
+15 +15 +12
bb
b
bb
bb
b
bb
bb
b
bb
bb
b
bb
bb
b
bb
bb
b
bb
: Do not adjust.
No. 560156
AV-21ATG
■ PRESET ADJUSTMENT (Page 23)
[SUB MENU 5. PRESET]
Colour system Initial setting value
Setting item PAL SECAM NTSC 3.58 NTSC 4.43
1. C-TRAP FIX 1 bbb
2. SHARP PEAK 0 bbb
3. ABL 1 bbb
4. GAMMA 0 bbb
5. Y.DELAY TIME TV 0 2 2 3
VIDEO 0 2 0 2
6. BLACK EXP START 3 bbb
7. C-BPF TV 1 b 0 b
VIDEO 1 bbb
8. CW/SCP 0 bbb
9. V.IF DET. LEVEL 0 bbb
11. IF AGC MIN. 0 bbb
12. V.IF AGC 0 bbb
13. V.IF PMOD 0 bbb
19. VNR 15 bbb
20. RGB LIM. 1 bbb
21. RGB LIMIT LEVEL 2 bbb
23. TEXT H. POSITION −3 bbb
24. READ DATA
: Do not adjust.
TV RF system Initial setting value
Setting item B/G I D/K M
10. S.IF DET. LEVEL 0 bbb
14. S.IF BPF BW ADJUST 0 bbb
15. S.IF TRAP FO ADJUST 0 bbb
16. S.IF TRAP FO ADJUST 2 0 bbb
17. S.IF-TRAP 0 bbb
18. S.IF-BPF 0 bb 1
22. S.IF SW 1 bb 0
: Do not adjust.
No. 56015 7
AV-21ATG
VICTOR COMPANY OF JAPAN, LIMITED
TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan
No. 560158
AV21ATGA-H #3
CTH 0005
CRT
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