JVC AV56WP74 - Service Manual Immediate Download

SERVICE MANUAL

No.52105C

2003/10

AV-48WP74

AV-56WP74

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.

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) 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>

CN00Y

CN00E

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

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

Select item

Change value

CRT FOCUS adjustment point

(No. 52105C)

AV-48WP74

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

L1=30mm

L2=45mm

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

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

***