JVC I Art PRO AV-48WP74 User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD. No.52105C
2003/10
AV-48WP74
AV-56WP74
1
AV-48WP74 /HA
AV-56WP74 /HA
ADDITION ITEM
The adjustment performed using test mode is added. For this reason, the item of “HOW TO ENTER THE
TEST MODE” was described below.
1) HOW TO ENTER TEST MODE
3. Press [5] key and enter the 5.CONVER OFF.
(Fig. 2)
4. Press [INPUT] key and select the cross-hatch
pattern. (Fig. 3)
NOTE : For this adjustment, it is necessary to use
a remote control unit (e.g. RM-C322G) with
[INPUT] key.
Press [SLEEP TIMER] key and set SLEEP
TIMER 30 MIN.
2.
1.
While the indication of SLEEP TIMER 30
MIN. is being displayed, press [DISPLY] key
and [VIDEO STATUS] key. The TEST
MODE screen is displayed. (Fig. 1)
REAR PROJECTION TELEVISION
BASIC CHASSIS
SB3
Since some details of the AV-48WP74/HA / AV-56WP74/HA service manual (No.52105 2003/4) were
incorrect , We are informing you of these errors and of the new correct descriptions.
Supplementary
1. I2C STOP
2. STATUS DISP.
4. SELF-CHK
5. CONVER OFF
TEST MODE
ROM CORRECTION : ACT
ROM VERSION :
Fig. 1
Fig. 2 Fig. 3
*******

(No. 52105C)
AV-48WP74
AV-56WP74
2
2) 3.4 ADJUSTMENT LOCATION (1/2) (Page.1-22)
3) 3.8.2 HORIZONTAL FREQUENCY ADJUSTMENT (Page 1-46)
Item Measuring
instrument Test point Adjustment part Description
H. FREQUENCY
adjustment
Signal
generator
Remote
control unit
[1.PICTURE/SOUND]
D15 : H. FREQ.
D19 : DEF. RST
(1) Receive any broadcast.
(2) Press [ASPECT] key and select FULL mode.
(3) Select 1. PICTURE/SOUND from SERVICE MENU.
(4) Select <D19> (DEF. RST) and change the data 0 to 1.
(5) While observing the screen, adjust the <D15> (H.
FREQ) so that an optimum horizontal synchronization is
obtained.
(6) After adjustment, select <D19> and change the data 1
to 0.
(7) Press [MUTING] key to memorize the set value.
Incorrect <D19>
Correct <D18>
F
M
S
Q
DC
SY
M
S3
CN00Y
CN00E
HG
AUDIO / VIDEO
S-VIDEO
COMPONENT
VIDEO-V
AUDIO
CONVERGENCE
OUT PWB
DIGITAL INPUT
MODULE PWB
G CRT
SOCKET
PWB
DIGITAL INPUT
MODULE PWB
MAIN PWB
RECEIVER
PWB
MI-COM&DIST
MODULE PWB
SUB TUNER
(TU101)
SPEAKER
AUDIO IN
Incorrect
Correct
MAIN TUNER
(TU0102)
MAIN TUNER
Incorrect
Correct
SUB TUNER
(TU1101)
CORRECT ITEM
1) 2.9.3 SERVICE ADJUSTMENT ITEM (Page.1-18)
8.PP
Multi-picture adjustment and
setting
ADM001~ADM034 Do not adjust
DELETION

(No. 52105C)
AV-48WP74
AV-56WP74
3
4) 3.8.3 FOCUS & BEAM SPOT ADJUSTMENT (Page 1-47)
Incorrect Correct
5) 3.8.4.2 PREPARATION (Page 1-49)
Item Measuring
instrument
Test point Adjustment part Description
SCREEN TILT
adjustment
Signal
generator
Remote
control unit
[1.PICTURE/SOUND]
F62 : Without
convergence 0peration
G DEF. YOKE
R DEF. YOKE
B DEF. YOKE
[PROJECTION UNIT]
Confirm correct FOCUS adjustment.
(1) Receive NTSC cross-hatch signal.
(2) Select 1. PICTURE/SOUND from SERVICE MENU.
(3) Select <F62> (Without convergence operation) with [CH +] /
[CH -] key
(4) Change the data 0 to 1, then it makes picture without
convergence operation.
(5) Makes a green single color.
NOTE :
When making a single color, It squeezes SCREEN VR in each
one, or it does a lid to the lens in the adjustment color and it
makes it single color.
(6) Temporarily secure the G deflection yoke to the top of the
neck and adjust the tilt of the deflection yoke so that the
horizontal line at the center becomes flat. After adjustment,
fasten the temporal screw.
(7) Adjust the tilt of the R and B deflection yokes in the same
manner as for green.
NOTE :
Make sure that the adjustment of CRT FOCUS is optimized at the
center and at the fringe of the center in turn. If the proper
adjustment has not been done, adjust FOCUS VR again.
Adjustment according to an internal signal
using TEST MODE is also possible.
(TEST MODE : Refer to top page)
ADDITION
1.PICTURE/SOUND menu
* * * * * * * *
F62 0
Select item Change value
0 1
CRT FOCUS adjustment point CRT FOCUS adjustment point

(No. 52105C)
AV-48WP74
4
6) 3.8.4.2 PREPARATION (Page 1-49)
RASTER
CENTERNG &
H. POSITION /
SIZE (coarse)
adjustment
Signal
generator
Remote
Control unit
[1.PICTURE/SOUND]
D03 : H. SIZE
D14 : H. CENTER
F62 : W ithout
convergence 0peration
G CENTERING
magnet
G CENTERING
magnet
G CENTERING
magnet
[DEF. YOKE]
(1) Receive NTSC cross-hatch signal.
(2) Select 1. PICTURE/SOUND from SERVICE MENU.
(3) Select <F62> (Without convergence operation) with [CH
+] / [CH -] keys.
(4) Change the data 0 to 1, then it makes picture without
convergence operation.
(5) Makes a green single color.
NOTE :
When making a single color, It squeezes SCREEN VR
in each one, or it does a lid to the lens in the adjustment
color and it makes it single color.
(6) Select <D03> (H. SIZE) and shorten the level until
and perpendicular amplitude of vibration with until
the blanking in Left and Right and on either side
can be seen
(7) Select <D14> (H. CENTER) and adjust horizontal
position to make the screen center and signal
center.
(8) Select <D03> and adjust horizontal size to make
screen picture approx. 92% of H-SIZE.
(9) After adjustment, select <F62> and change the
data 1 to 0.
(10) Press [MUTING] key and memorize the set value.
(11) Adjust G CENTERING magnet to make horizontal
and vertical line center as mechanical center of
screen.
(12) Red and blue color too, are reflected by it.
(13) Using R CENTERING magnet and B CENTERING
magnet, adjusts for the line of the red(L1) and the
blue(L2) to become the position of the left figure
NOTE :
Vertical center position of the red and blue are the
same as green.
R G B
L2
L1=30mm L2=45mm
L1
AV-56WP74
Adjustment according to an internal signal
using TEST MODE is also possible.
(TEST MODE : Refer to top page)
ADDITION

AV-48WP74
AV-56WP74
(No.52105C) 5
7) 3.6.5 SERVICE MENU SETTING (Page 1-26)
3. WHITE BALANCE
Adjustment of LOW LIGHT / HIGH LIGHT
1.SELECT ITEM
• Press [CH+] / [CH-] key
2.SETTING VALUE
BRIGHT
• Press [VOL+] / [VOL-]
DRIVE
[4] key : DRIVE R is up
[7] key : DRIVE R is down
[6] key : DRIVE B is up
[9] key : DRIVE R is down
CUTOFF
[4] key : CUTOFF R is up
[7] key : CUTOFF R is down
[5] key : CUTOFF G is up
[8] key : CUTOFF G is down
[6] key : CUTOFF B is up
[9] key : CUTOFF B is down
DRV R069 B054
CUT R078 G079 B079
BR
3. WHITE BALANCE
R.DRIVE VALUE
B.DRIVE VALUE
B.CUT OFF VALUE
G.CUT OFF VALUE
R.CUT OFF VALUE
DRIVE
[2] key : DRIVE R is up
[5] key : DRIVE R is down
[3] key : DRIVE B is up
[6] key : DRIVE B is down
CUTOFF
[7] key : CUTOFF G is up
[100+] key : CUTOFF G is down
[8] key : CUTOFF R is up
[0] key : CUTOFF R is down
[9] key : CUTOFF B is up
[TV] key : CUTOFF B is down
WHITE BALANCE
KEY OPERATION CORRECTION
***

AV-48WP74
AV-56WP74
WHITE
BALANCE
(LOW LIGHT)
adjustment
Signal
generator
Remote
control unit
[1.PICTURE/SOUND]
S14: CUTOF R
S16: CUTOF G
S18: CUTOF B
S20: CUTOF SW R
S21: CUTOF SW G
S22: CUTOF SW B
(1) Receive NTSC black & white pattern signal (color
off).
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) The COLOR TEMP is setat the LOW mode.
(4) Select 3.WHITE BALANCEfrom SERVICE MENU.
(5) Increase bright level to confirm LOW-LIGHT with
[VOL +] key.
(7) Adjust using [ 4 ] /[ 7 ] (R CUTOFF), [ 6 ] / [ 9 ] (B
CUTOFF) key so that a black portion may become
black.
(8) Press [MUTING] key and memorize the set values.
(9) Input 480i component black & white pattern signal
from COMPONENTVIDEO terminal.
(10) Repeat steps 5 ~ 8above.
(11) Input 1080i component black & white signal from
COMPONENT VIDEO terminal.
(12) Repeat steps 5 ~ 8above.
NOTE :
Before starting the adjustment, warm up the unit for
more than 30 minutes.
Item Measuring
instrument Test point Adjustment part Description
BR
BRIGHT LEVEL
Setting value
DRV
DRIVE R
R
B
GBCUT
CUTOFF
3. WHITE BALANCE
NTSC
SETTING VALUE
BR 133
DRV R 073
CUT R 188
B 060
G 149 B 215
480i
BR
DRV R 074
CUT R 194
B 058
G 149 B 210
1080i
BR
DRV R 074
CUT R 195
B 058
G 149 B 210
REMOTE CONTROL UNIT
EXIT
R CUTOFF
123
456
789
0
B CUTOFFG CUTOFF
R CUTOFF B CUTOFFG CUTOFF
OSD ON/OFF
Incorrect
Incorrect
Incorrect
[4] / [7] [8] / [0]
[9] / [TV][4] / [7]
Correct
correct
Correct
REMOTE CONTROLUNIT
(6) Set the setting value.
REMOTE CONTROL UNIT
OPERATION KEY NO. CORRECTION
R CUTOFF
B CUTOFF
[1.PICTURE/SOUND]
S14: CUTOF R
S16: CUTOF G
S18: CUTOF B
S20: CUTOF SW R
S21: CUTOF SW G
S22: CUTOF SW B
[3.WHITE BALANCE]
BR
CUT R
CUT G
CUT B
(No. 52105C)
6
8) 3.8.5 VIDEO ADJUSTMENT
WHITE BLANCE (Page 1-58)
ADDITION
123
456
789
0
100+ TV
CUTOFF R
CUTOFF B

AV-48WP74
AV-56WP74
(No.52105C) 7
WHITE
BALANCE
(HIGH LIGHT)
adjustment
Signal
generator
Remote
control unit
[1.PICTURE/SOUND]
S10: DRIVE R
S12: DRIVE B
(1) Receive NTSC black & white signal (color off).
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) The COLOR TEMP is set at LOW mode.
(4) Select 1.PICTER/SOUND from SERVICE MENU.
(5) Select <S10> (DRIVE R) or <S12> (DRIVE B).
(7)
(6) Set the INITIAL SETTING VALUE.
Adjust <S10> or <S12> so that the natural white
should be visible.
(8) Press [MUTING] key and memorize the set values.
(9) Input 480i component black & white signal from
COMPONENT VIDEO terminal.
(10) Repeat steps 5 ~ 8 above.
(11) Input 1080i component black & white signal from
COMPONENT VIDEO terminal.
(12) Repeat steps 5 ~ 8 above.
Item Measuring
instrument Test point Adjustment part Description
Setting Item Setting value
DRIVE RS10
1. PICTUER/SOUND
NTSC FULL DA H FL MUTE
S10 073 074 074
NTSC 480i 1080i
Setting value
INITIAL SETTING VALUE
S12 060 058 058
Signal
Item
9) WHITE BALANCE (Page 1-59)
ADDITION
***

4
Printed in Japan
200310WPC
JVC CANADA INC.
Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 [phone]
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
www.jvcservice.com(US Only)

AV-48WP74
AV-56WP74
(No.52105)3-1
PARTS LIST
CAUTION
JThe parts identified by the symbol are important for the safety . Whenever replacing these parts, be sure to use specified ones to secure the
safety.
JThe parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied.
JP. W. Board Ass'y will not be supplied, but those which are filled with the Parts No. in the Parts No. columns will be supplied.
ABBREVIATIONS OF RESISTORS, CAPACITORS AND TOLERANCES
RESISTORS CAPACITORS
CR Carbon Resistor C CAP. Ceramic Capacitor
FR Fusible Resistor E CAP. Electrolytic Capacitor
PR Plate Resistor M CAP. Mylar Capacitor
VR Variable Resistor CH CAP. Chip Capacitor
HV R High Voltage Resistor HV CAP. High Voltage Capacitor
MF R Metal Film Resistor MF CAP. Metalized Film Capacitor
MG R Metal Glazed Resistor MM CAP. Metalized Mylar Capacitor
MP R Metal Plate Resistor MP CAP. Metalized Polystyrol Capacitor
OM R Metal Oxide Film Resistor PP CAP. Polypropylene Capacitor
CMF R Coating Metal Film Resistor PS CAP. Polystyrol Capacitor
UNF R Non-Flammable Resistor TF CAP. Thin Film Capacitor
CH V R Chip Variable Resistor MPP CAP. Metalized Polypropylene Capacitor
CH MG R Chip Metal Glazed Resistor TAN. CAP. Tantalum Capacitor
COMP. R Composition Resistor CH C CAP. Chip Ceramic Capacitor
LPTC R Linear Positive Temperature Coefficient Resistor BP E CAP. Bi-Polar Electrolytic Capacitor
CH AL E CAP. Chip Aluminum Electrolytic Capacitor
CH AL BP CAP. Chip Aluminum Bi-Polar Capacitor
CH TAN. E CAP. Chip Tantalum Electrolytic Capacitor
CH AL BP E CAP. Chip Tantalum Bi-Polar Electrolytic Capacitor
RESISTORS
FG J KMNRHZP
±1% ±2% ±5% ±10% ±20% ±30% +30%
-10%
+50%
-10%
+80%
-20%
+100%
-0%

AV-48WP74
AV-56WP74
3-2(No.52105)
CONTENTS
EXPLODED VIEW PARTS LIST - 1 ............................................................................................................................................................. 3-2
EXPLODED VIEW - 1 ................................................................................................................................................................................... 3-3
EXPLODED VIEW PARTS LIST - 2 ............................................................................................................................................................. 3-4
EXPLODED VIEW - 2 ................................................................................................................................................................................... 3-4
PRINTED WIRING BOARD PARTS LIST .................................................................................................................................................... 3-6
MAIN PW BOARD ASS’Y (SSB-1070A-M2) [AV-48WP74] (SSB-1069A-M2) [AV-56WP74] ................................................................. 3-6
POWER & DEF PW BOARD ASS’Y (SSB-2070A-M2) [AV-48WP74] (SSB-2069A-M2) [AV-56WP74] ...............................................3-10
R CRT SOCKET PW BOARD ASS’Y (SSB-3168A-M2) ....................................................................................................................... 3-12
G CRT SOCKET PW BOARD ASS’Y (SSB-3268A-M2) ....................................................................................................................... 3-12
B CRT SOCKET PW BOARD ASS’Y (SSB-3368A-M2) ........................................................................................................................ 3-13
CONVERGENCE OUT PW BOARD ASS’Y (SSB-5068A-M2) ............................................................................................................. 3-13
VM PW BOARD ASS’Y (SSB-7268A-M2) ............................................................................................................................................. 3-14
REMOCON SENSOR PW BOARD ASS’Y (SSB-8068A-M2) ............................................................................................................... 3-14
LINE FILTER PW BOARD ASS’Y (SSB-9068A-M2) ............................................................................................................................. 3-14
DEF OSC PW BOARD ASS’Y (SSB0H068A-M2) ................................................................................................................................. 3-14
RECEIVER PW BOARD ASS’Y (SSB0R368A-M2) .............................................................................................................................. 3-16
FRONT CONTROL PW BOARD ASS’Y (SSB0L068A-M2) .................................................................................................................. 3-17
FRONT RELAY PW BOARD ASS’Y (SSB0L268A-M2) ........................................................................................................................ 3-18
DIGITAL INPUT MODULE PW BOARD ASS’Y (48WP74CP-S) [AV-48WP74] (56WP74CP-S) [AV-56WP74] ................................... 3-18
DIGITAL CONVERGENCE MODULE PW BOARD ASS’Y (SSB0K070A-M2) [AV-48WP74] (SSB0K069A-M2) [AV-56WP74] .............. 3-18
MI-COM & DIST MODULE PW BOARD ASS’Y (SSB0D070A-M2) [AV-48WP74] (SSB0D069A-M2) [AV-56WP74] ........................... 3-18
REMOTE CONTROL UNIT PARTS LIST (RM-C1200G-1H) ...................................................................................................................... 3-18
PACKING .................................................................................................................................................................................................... 3-19
PACKING PARTS LIST .............................................................................................................................................................................. 3-19
EXPLODED VIEW PARTS LIST - 1
Ref.No. Part No. Part Name Description Local
1 48WP74SCSAM2 SCREEN ASSY AV-48WP74
1 56WP74SCSAM2 SCREEN ASSY AV-56WP74
2 LC11247-001C-A BACK COVER AV-48WP74
2 LC11407-001C-A BACK COVER AV-56WP74
4 QYSBSF4012Z TAP SCREW 4mm x 12mm(x2)
5 LC31752-001A-A MIRROR BRACKET (x2) AV-48WP74
5 LC41419-001A-A MIRROR BRACKET (x2) AV-56WP74
6 QYSBSF4012Z TAP SCREW 4mm x 12mm(x2) AV-56WP74
8 QYSBSAG4018M TAP SCREW 4mm x 18mm(x2)
16 LC41237-001A RUBBER CATCH (x4) AV-48WP74
16 LC41237-001A RUBBER CATCH (x6) AV-56WP74
17 QYSBSFG4016M TAP SCREW 4mm x 16mm(x10)
18 QYSBSFG4016M TAP SCREW 4mm x 16mm(x3)
19 QYSBSF4012Z TAP SCREW 4mm x 12mm(x2)
20 QYSBSA4012M TAP SCREW 4mm x 12mm(x2)
21 QYSBSAG4018M TAP SCREW 4mm x 18mm(x2)
23 LC31733-001A-A MIRROR AV-48WP74
23 LC31954-001A-A MIRROR AV-56WP74
24 LC11251-001D-A SPEAKER GRILL AV-48WP74
24 LC11406-002A-A SPEAKER GRILL AV-56WP74
25 LC11248-001C-A BODY AV-48WP74
25 LC11408-001A-A BODY AV-56WP74
26 LC20982-003A-A BACK BOARD
27 LC31757-002A-A FRONT BOARD
28 QAS0104-001 SPEAKER SP01 SP02(x2) AV-48WP74
28 QAS0134-001 SPEAKER SP01 SP02(x2) AV-56WP74
29 QAS0105-001 SPEAKER SP03 SP04(x2) AV-48WP74
29 QAS0133-001 SPEAKER SP03 SP04(x2) AV-56WP74
30 QYSBSA4012M TAP SCREW 4mm x 12mm(x12)
31 LC31756-001A-A BC FITTING (x2)
32 CM22765-001-A COOLANT PAN
33 LC31139-001A-A RATING LABEL
34 LC41424-001A-A HDCP WARNING
35 QYSBSFG4020M TAP SCREW 4mm x 20mm(x4)
36 QYSBSAG4018M TAP SCREW 4mm x 18mm(x4)
37 QYSBSFG4016M TAP SCREW 4mm x 16mm(x4)
39 QYSDSA4015Z SCREW 4mm x 15mm(x4)
40 QYSBSAG4018M TAP SCREW 4mm x 18mm(x4)
41 CM47752-006 BRAND MARK AV-48WP74
41 CM47752-004 BRAND MARK AV-56WP74
42 QYSPSPD4020Z SCREW 4mm x 20mm(x2)
43 QYSBSF4012Z TAP SCREW 4mm x 12mm(x2)
44 LC11245-001D-A FRONT PANEL AV-48WP74
44 LC11405-003A-A FRONT PANEL AV-56WP74
45 LC31737-001A-A SC SHIELD 48 AV-48WP74
45 LC31949-001A-A SC SHIELD 56 AV-56WP74
46 LC31744-001A-A SCREEN LENTI AV-48WP74
46 LC31950-001A-A SCREEN LENTI AV-56WP74
47 LC31745-001A-A SCREEN FRESNEL AV-48WP74
47 LC31951-001A-A SCREEN FRESNEL AV-56WP74