JVC AV-14FTT Service Manual

AV-14FTT
AV-14FTT
SERVICE MANUAL
COLOUR TELEVISION
BASIC CHASSIS
CG
AV-14FTT
This service manual mainly consists of the following items:
• The items which differ from those for the AV-14FTR 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-14FTR Service Manual (No. 51751, Jul. 2000)
Note: The page in parentheses shows the one for the AV-14FTR service manual (No. 51751, 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.
Model name
AV-14FTT
MODEL NO.
XXXXX XXXXXXX XXXXXXX XXXXX
XXXXXX
XXXXX
XXX XXXXX XXXXX
SERIAL No.
XXXX XX XXXX XXX XX XXXX
XXXXXX–XXX
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
No. 56074 1
No. 56074 Sep. 2000
AV-14FTT

PARTS DIFFERENCE TABLE

The different parts between AV-14FTR and AV-14FTT are described below:
!!
! REF. NO. PART NAME DESCRIPTION
!!
AV-14FTR AV-14FTT PART No. PART No.
EXPLODED VIEW PARTS LIST (Page 32)
1 LC10831-001D-H LC10831-003B-H FRONT CABINET 2 CM46880-002-H CM46880-B01-H JVC MARK 6 LC30616-004A-H LC30616-001B-H POWER KNOB 7 LC20292-004A-H LC20292-001A-H CONTROL KNOB
! 19 LC20377-010B-H LC20377-001B-H RATING LABEL
PRINTED WIRING BOARD PARTS LIST [MAIN PWB ASSY] (Page 34-)
SCG-1016A-H2 SCG-1257A-H2 MAIN PWB ASSY IC1701 MN1873287JA1 MN1873287JB IC (MICROCOMPUTER) IC1702 AT24C08-21P7EE AT24C08-21FM IC (MEMORY) (Service) IC1821 SDA5254-2-B003 SDA5254-2-B004 IC
PACKING PARTS LIST (Page 38)
1 LC10453-091A-H GG10056-008A-H PACKING CASE
! 6 LCT0732-001A-H LCT0752-001A-H INST BOOK ! LCT0753-001A-H DIGEST MANUAL
No. 560742

SPECIFICATIONS (Page 2)

Item Content
Dimensions (W × H × D) 462mm × 340.5mm × 375mm Mass 10kg TV RF System B / G, I, D / K, K1 Colour System TV Mode PAL / SECAM
VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43
Teletext System FLOF (Fastext), WST (World standard system) 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 75 Unbalanced Power Input AC110 ~ 240V, 50/60Hz Power Consumption 70W (Max.) / 47W (Avg.) Picture Tube Visible size : 34cm measured diagonally High Voltage 22.5kV ± 1.5kV (at zero beam current) Speaker 5cm × 9cm Oval type × 2 Audio Output 3W (Monaural) Input Video 1Vp-p, 75
Audio 500mVrms (4dBs), High impedance
Output Video 1Vp-p, 75
Audio 500mVrms (–4dBs), Low impedance
Headphone Jack Stereo mini jack (3.5ø) Remote Control Unit RM-C223-2C (Battery size : AA/R06/UM-3 × 2)
AV-14FTT
Design & specifications are subject to change without notice.
No. 56074 3
AV-14FTT

SPECIFIC SERVICE INSTRUCTIONS

SETTING OF SYSTEM CONSTANT SET (Page 9)
Table 1
Setting item Setting contents Setting value
COLOUR TRIPLE BILINGUAL NO TUNER MA ECO SENSOR YES LANGUAGE E/R/A/F B/B SOUND ON
LOCK 180
COLOUR AUTO NO 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 9)
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. 560744

SERVICE ADJUSTMENTS

Initial Setting Value
IF CIRCUIT ADJUSTMENT -- Adjustment of DELAY POINT (Page 17)
AV-14FTT
Setting (Adjustment) Item
DELAY POINT (AGC TAKE-OVER)
Variable Initial setting range value
0 ~ 127 43
V/C (VIDEO/CHROMA) CIRCUIT ADJUSTMENT (Page 17)
[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 / +80 / 0
7. SECAM BL ADJUST 32 ~ +31 0 bbb
8. SHARP TV / VIDEO 32 ~ +31 15 / +5 bbb
: Do not adjust.
Adjustment of SUB COLOUR-II (Page 20)
Adjustment part Description
5. COLOUR
PAL COLOUR Value (A) in the figure: Set to +9V (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 +9V (W & G).
Adjustment of SUB TINT-II (Page 21)
Adjustment part Description
6. TINT
NTSC 3.58 TINT Value (B) in the figure: Set to +7V (W & Cy).
No. 56074 5
AV-14FTT
DEFLECTION CIRCUIT ADJUSTMENT (Page 23)
[SUB MENU 3. DEF]
Setting item Adjustment name Variable range
1. VER. POSITION Vertical center 4 ~ +3 2 3
2. HOR. POSITION Horizontal center 16 ~ +15 +1 +4
3. VER. HEIGHT Vertical height 64 ~ +63 40 0
4. VER. LINEARITY Vertical linearity 32 ~ +31 +13 3
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 25)
[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. 560746
AV-14FTT
PRESET ADJUSTMENT (Page 26)
[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 b
3. ABL 1 b
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. 56074 7
AV-14FTT
VICTOR COMPANY OF JAPAN, LIMITED
TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan
No. 560748
AV14FTT-H #3
CTH 0009 CRT
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