JVC AV-DX25 User manual

AV-DX25
No. 56062 1
MODEL NO.
XXXXX XXXXXXX
XXXXXXX XXXXX
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XXXXX
XXX XXXXX XXXXX
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SERIALNo.
XXXXXX–XXX
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Identify model name
Basic model name
BASIC CHASSIS
JK
SERVICE MANUAL
COLOUR TELEVISION
AV-DX25(HK)
COPYRIGHT  2000 VICTOR COMPANY OF JAPAN, LTD. No. 56062
Sep. 2000
HOW TO IDENTIFY MODEL
While referring to the illustration given below, identify model name on the rating label affixed to the rear cover.
This service manual mainly consists of the following items:
• The items which differ from those for the AV-25PS 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-25PS Service Manual (No. 51750, Jul. 2000)
Note: The page in parentheses shows the one for the AV-25PS service manual (No. 51750, Jul. 2000).
AV-DX25
AV-DV25-HK
AV-DX25

AV-DX25
No. 560622
AV-25PS AV-DX25(HK)
!!
!!
!REF. NO. PART NAME DESCRIPTION
PART No. PART No.
■EXPLODED VIEW PARTS LIST (Page 36)
!10 QMP40D0-200J3 QMPN050-200-E2 POWER CORD
or QMP40D0-200J5
!14 LC20377-001B-H LC20377-012B-H RATING LABEL
25 LC10475-012A-H LC10475-016A-H FRONT CABI ASSY
■PRINTED WIRING BOARD PARTS LIST [MAIN PWB ASSY] (Page 38-)
— SJK-1005A-H2 SJK-1028A-H2 MAIN PWB ASSY
R1329 NRSA02J-102X CH MG R 1kΩ1/10W J
NRSA02J-0R0X CH MG R 0.0Ω1/10W J
R1330 NRSA02J-472X CH MG R 4.7kΩ1/10W J
NRSA02J-0R0X CH MG R 0.0Ω1/10W J
R1871 NRSA02J-102X CH MG R 1kΩ1/10W J
R1872 NRSA02J-222X CH MG R 2.2kΩ1/10W J
R1873 NRSA02J-222X CH MG R 2.2kΩ1/10W J
R1874 NRSA02J-272X CH MG R 2.7kΩ1/10W J
R1875 NRSA02J-0R0X CH MG R 0.0Ω1/10W J
R1876 NRSA02J-102X CH MG R 1kΩ1/10W J
R1877 NRSA02J-393X CH MG R 39kΩ1/10W J
R1878 NRSA02J-182X CH MG R 1.8kΩ1/10W J
R1879 NRSA02J-182X CH MG R 1.8kΩ1/10W J
R1880 NRSA02J-182X CH MG R 1.8kΩ1/10W J
R1881 NRSA02J-181X CH MG R 180Ω1/10W J
R1882 NRSA02J-181X CH MG R 180Ω1/10W J
R1883 NRSA02J-102X CH MG R 1kΩ1/10W J
R1884 NRSA02J-181X CH MG R 180Ω1/10W J
C1324 QETN1HM-105Z E. CAP. 1µF 50V M
C1325 QETN1HM-105Z E. CAP. 1µF 50V M
C1326 QETN1HM-105Z E. CAP. 1µF 50V M
C1334 NCB21HK-103X CH C CAP. 0.01µF 50V K
C1335 NCB21HK-103X CH C CAP. 0.01µF 50V K
C1336 NCB21HK-103X CH C CAP. 0.01µF 50V K
C1871 NCB21EK-104X CH C CAP. 0.1µF 25V K
C1872 NCB21HK-223X CH C CAP. 0.022µF 50V K
C1873 NDC21HJ-221X CH C CAP. 220pF 50V J
PARTS DIFFERENCE TABLE
The different parts between AV-25PS and AV-DX25(HK) are described below:

AV-DX25
No. 56062 3
C1874 NDC21HJ-150X CH C CAP. 15pF 50V J
C1875 NDC21HJ-150X CH C CAP. 15pF 50V J
C1876 NDC21HJ-221X CH C CAP. 220pF 50V J
C1877 NCB21EK-104X CH C CAP. 0.1µF 25V K
C1878 NCB21HK-102X CH C CAP. 1000pF 50V K
C1879 NDC21HJ-221X CH C CAP. 220pF 50V J
C1880 QETN1AM-477Z E CAP. 470µF 10V M
C1881 NCB21EK-104X CH C CAP. 0.1µF 25V K
C1882 QETN1EM-476Z E CAP. 47µF 25V M
C1883 NCB21HK-103X CH C CAP. 0.01µF 50V K
C1884 NCB21EK-104X CH C CAP. 0.1µF 25V K
C1885 NCB21EK-104X CH C CAP. 0.1µF 25V K
C1886 NCB21HK-103X CH C CAP. 0.01µF 50V K
L1871 QQL244K-4R7Z PEAKING COIL 4.7µHK
L1872 QQL244K-3R3Z PEAKING COIL 3.3µHK
D1303 MA111-X CHIP DIODE
Q1871 2SA1037AK/QR/-X SI TRANSISTOR
Q1872 2SC2412K/QR/-X CHIP TRANSISTOR
IC1701 M37280MF-173SP M37280MF-200SP IC (MICROCOMPUTER)
IC1702 AT24C16-29RSB AT24C16-29RF7C IC (MEMORY) (Service)
IC1871 ET417 IC
IC1872 ET211 IC
X1871 CE41257-001Z X TAL
■PACKING PARTS LIST (Page 47)
1 LC10453-078A-H GG10044-016A-H PACKING CASE
4 RM-C112-2H RM-C115-2H REMOCON UNIT
!6 LCT0664-001A-H LCT0849-001A-H INST BOOK
AV-25PS AV-DX25(HK)
!!
!!
!REF. NO. PART NAME DESCRIPTION
PART No. PART No.
■PRINTED WIRING BOARD PARTS LIST [MAIN PWB ASSY] - Continued (Page 38-)

AV-DX25
No. 560624
Item CONTENTS
Dimensions (W ×H ×D) 655mm ×530.5mm ×465mm
Mass 36kg
TV RF System B, G, I, D, K, K1, M
Colour System PAL, SECAM, NTSC3.58, NTSC4.43
Stereo System A2 / NICAM (B/G, I, D/K)
Receiving Frequency VHF (L) 46.25MHz ~ 168.25MHz
VHF (H) 175.25MHz ~ 463.25MHz
UHF 471.25MHz ~ 863.25MHz
CATV Mid (X-Z, S1-S10), Super (S11-S20), Hyper (S21-S41) bands receivable
Intermediate Frequency
VIF Carrier 38.0MHz
SIF Carrier 33.5MHz(4.5MHz), 32.5MHz(5.5MHz), 32.0MHz(6.0MHz), 31.5MHz(6.5MHz)
Colour Sub Carrier Frequency
PAL 4.43MHz
SECAM 4.40625MHz, 4.25MHz
NTSC 3.58MHz / 4.43MHz
Power Input AC110 ~ 240V, 50/60Hz
Power Consumption 164W, 1.31A (at 220V)
Picture Tube Visible size : 60cm measured diagonally
High Voltage 31.0kV ±1.5kV (at zero beam current)
Speaker & Audio Output Open dome speaker
10W+10W, 10cm round x 2
Video Audio Input terminals
Video1 S-Video Y: 1Vp-p Positive (Negative sync provided, when terminated with 75Ω)
C: 0.286Vp-p (Burst signal, when terminated with 75Ω)
Video 1Vp-p 75Ω(RCA pin jack)
Audio (L/R) 500mVrms (−4dBs), High impedance (RCA pin jack)
Video2 Video 1Vp-p 75Ω(RCA pin jack)
Audio (L/R) 500mVrms (–4dBs), High impedance (RCApin jack)
Video3 Video/Y Composite video 1Vp-p 75Ω(RCA pin jack)
Component video 1Vp-p 75Ω(RCA pin jack)
Cb Component video B-Y 0.7Vp-p 75Ω(RCA pin jack)
Cr Component video R-Y 0.7Vp-p 75Ω(RCA pin jack)
Audio (L/R) 500mVrms (–4dBs), High impedance (RCApin jack)
Video4 Video 1Vp-p 75Ω(RCA pin jack)
Audio (L/R) 500mVrms (−4dBs), High impedance (RCA pin jack)
Video Audio Output terminal
Video 1Vp-p 75Ω(RCA pin jack)
Audio (L/R) 500mVrms (−4dBs), High impedance (RCA pin jack)
Aerial Input Terminal 75ΩUnbalanced, Coaxial
Headphone Jack Stereo mini jack (3.5ø)
AV Compu Link terminal AV Compu Link II, mini jack (3.5ø)
Remote Control Unit RM-C115 (AA/R06 / UM-3 dry battery ×2)
Design & specifications are subject to change without notice.
SPECIFICATIONS(Page 2)

AV-DX25
No. 56062 5
SETTING OF SYSTEM CONSTANT SET (Page 9)
Table 1
SPECIFIC SERVICE INSTRUCTIONS
CONTENTS VARIABLE RANGE INITIAL SETTING VALUE
COLOUR MULTI
MSP YES
SUPER BASS NO
CENTER SPEAKER NO
TEXT NO
BLUE BACK MUTE NO
VOLUME LIMIT YES
COLOUR AUTO NO
TILT YES
C-TRAP 1
E.M.C. NO
N/S WHITE BACK NO
7 LED SPEED 00
MULTI TRIPLE PAL
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
1 0
YES NO
YES NO
00 10 20 ... 1250
1270 1260
USER SETTING CONDITIONS (Page 9)
Table 2
PICTURE SETTING FEATURES
PICTURE MODE BRIGHT SLEEP TIMER OFF
CONTRAST CENTER ON TIMER PR1 0:00
BRIGHT CENTER BLUE BACK ON
SHARP CENTER CHILD LOCK OFF
COLOUR CENTER CHANNEL GUARD --
TINT CENTER AUTO SHUT OFF OFF
WHITE BALANCE COOL VIDEO-3 SETTING COMPONENT
PICTURE FEATURES INSTALL
A.A.C ON LANGUAGE ENGLISH
AUTO VNR AUTO AUTO PROGRAM --
COLOUR SYSTEM TV: According to preset CH EDIT / MANUAL PRESET CH only
VIDEO: AUTO PAL Others: blank
ZOOM REGULAR DEMO
ECO SENSOR OFF DEMO OFF
PICTURE TILT CENTER OTHERS
SOUND SETTING VOLUME Appropriate sound level
SETERO / I• II CHANNEL PRESET Refer to Operating Instructions.
BASS CENTER CHANNEL POSITION 1 POSITION
TREBLE CENTER SUB POWER ON
BALANCE CENTER ON SCREEN DISPLAY POSITION INDICATION
AI VOLUME ON TV/VIDEO TV
BBE ON SOUND SYSTEM B/G
SPATIALIZER OFF

AV-DX25
No. 560626
SERVICE ADJUSTMENTS
■Initial Setting Value
[INITIAL SETTING VALUES OF VSM PRESET (SUB MENU 5. VSM PRESET)]
[SETTING OF WHITE BALANCE PRESET (SUB MENU 6. WB PRESET)]
■SETTING OF VSM PRESET (Page 18)
2. CONT +17 +0−4
3. COLOR +0+0−1
4. SHARP +0 +0 −3
5. TINT +0 +0 +0
PICTURE
MODE BRIGHT STANDARD SOFT
ITEM
1. BRIGHT +0 +0 +0
■SETTING OF WHITE BALANCE PRESET (Page 19)
WHITE BALANCE COOL MID WARM
ITEM
1. R DRIVE 0 −3+26
2. B DRIVE 0 −23 −27
: Do not adjust.
: Do not adjust.

AV-DX25
No. 56062 7
Adjustment of SUB COLOUR-II (Page 22)
Adjustment of SUB TINT-II (Page 23)
Adjustment part Description
5. COLOUR
PAL COLOUR Value (A) in the figure: Set to 0V (W & G).
SECAM COLOUR Value (A) in the figure: Set to −5V (W & G).
NTSC 3.58 COLOUR Value (A) in the figure: Set to +6V (W & G).
Adjustment part Description
6. TINT
NTSC 3.58 TINT Value (B) in the figure: Set to +6V (W & Cy).
CONTENTS PAL SECAM NTSC 3.58 NTSC 4.43
R−60
1. CUTOFF G −60
B−60
2. DRIVE R +0
B+0
3. BRIGHT TV 000—
VIDEO +1−4−2—
COMPONENT −3
4. CONT TV 000—
VIDEO +20+2—
COMPONENT +2
5. COLOUR TV / VIDEO +10 +18 +0−2
COMPONENT +8+18
6. TINT TV +6+6−10
VIDEO +6+6+60
COMPONENT +6−3
7. BLACK OFFSET R-Y —0——
B-Y —0——
8. SHARP TV −15 −17 −15 —
VIDEO −13 −11 −12 —
COMPONENT −15
■VIDEO / CHROMA CIRCUIT ADJUSTMENT (Page 19)
: Do not adjust.

AV-DX25
No. 560628 CTH 0009
CRT
AVDX25HK-H #3
VICTOR COMPANY OF JAPAN, LIMITED
TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan
■DEFLECTION CIRCUIT ADJUSTMENT (Page 25)
[DEFLECTION ADJUSTMENTS INITIAL SETTING VALUE (SUB MENU 4. DEF)]
: Do not adjust.
■AUDIO CIRCUIT ADJUSTMENT (Page 29)
[AUDIO ADJUSTMENTS INITIAL SETTING VALUE (SUB MENU 3. AUDIO)]
Setting item Variable range Fixed value
1. ERROR LIMIT 000H ~ FF0H 100H
2. A2 ID THR 00H ~ FFH 14H
3. BASS −17 ~ +17 +0
4. TREBLE −17 ~ +17 +0
: Do not adjust.
Initial setting value
Setting item Adjustment name REGULAR ZOOM 16:9
50Hz 60Hz 50Hz 60Hz 50Hz 60Hz
1. V-SHIFT Vertical shift −30+10−10
2. V-SIZE Vertical size +13 0 +36 +35 −37 −37
3. SUBTITLE Subtitle 0 +10+70 0
4. H-CENT Horizontal center −9+5−1−10 0
5. H-SIZE Horizontal size +11 −1−9−7−10
6. EW-PIN Side pin correction −1−1−4−5+2+1
7. TRAPEZ Trapezoidal distortion correction +4−10 0−1+1
8. EW.COR.L Corner pin correction Low side −2000+1+1
9. EW.COR.H Corner pin correction High side −2000+1+1
10. V.S-COR Vertical size correction +900000
11. V-LIN Vertical Linearity 0 0 +10 0 0
12. H-BLK-R Horizontal Blanking Right 0000+29 0
13. H-BLK-L Horizontal Blanking Left 000000
14. V-EHT V size correction level caused by EHT change −400000
15. H-EHT H size correction level caused by EHT change −400000
16. EHT-GAIN Size correction gain caused by EHT change 000000