JVC AV-25PX User manual

AV-25PX
No. 56067 1
MODEL NO.
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SERIALNo.
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Identify model name
Basic model name
BASIC CHASSIS
JK
SERVICE MANUAL
COLOUR TELEVISION
AV-25PX(AU)
COPYRIGHT  2000 VICTOR COMPANY OF JAPAN, LTD. No. 56067
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-25PX 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-25PX Service Manual (No. 51752, Aug. 2000)
Note: The page in parentheses shows the one for the AV-25PX service manual (No. 51752, Aug. 2000).
AV-25PX
AV-25PX-AU
AV-25PX

AV-25PX
No. 560672
AV-25PX AV-25PX(AU)
!!
!!
!REF. NO. PART NAME DESCRIPTION
PART No. PART No.
■EXPLODED VIEW PARTS LIST (Page 36)
!10 QMP40D0-200J3 QMP2980-185J5 POWER CORD
or QMP40D0-200J5
!14 LC20377-010B-H LC20377-013B-H RATING LABEL
■PACKING PARTS LIST (Page 47)
1 LC10845-003A-H GG10044-015A-H PACKING CASE
!8 LCT0662-001A-H DIGEST MANUAL
!9 LCT0661-001A-H DIGEST MANUAL
— BT-56001-2 WARRANTY CARD
— BT-56002-2 SERVICE CENTER LIST
PARTS DIFFERENCE TABLE
The different parts between AV-25PX and AV-25PX(AU) are described below:

AV-25PX
No. 56067 3
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
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 181W (Max.), 119W (Avg.)
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 (RCA pin 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 (RCA pin 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-C113 (AA/R06 / UM-3 dry battery ×2)
Design & specifications are subject to change without notice.
SPECIFICATIONS(Page 2)

AV-25PX
No. 560674
SETTING OF SYSTEM CONSTANT SET (Page 9)
Table 1
SPECIFIC SERVICE INSTRUCTIONS
CONTENTS VARIABLE RANGE INITIAL SETTING VALUE
COLOUR MULTI
MSP NO
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
BASS CENTER CHANNEL PRESET Refer to Operating Instructions.
TREBLE CENTER CHANNEL POSITION 1 POSITION
BALANCE CENTER SUB POWER ON
AI VOLUME ON ON SCREEN DISPLAY POSITION INDICATION
BBE ON TV/VIDEO TV
SPATIALIZER OFF SOUND SYSTEM B/G

AV-25PX
No. 56067 5
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-25PX
No. 560676
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-25PX
No. 56067 7
■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

AV-25PX
No. 560678 CTH 0009
CRT
AV25PXAU-H #3
VICTOR COMPANY OF JAPAN, LIMITED
TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan