DV-L88 (serv.man6). Adjustment method - Sharp DVD Service Manual (repair manual). Page 4

  Adjustment Item

Adjustment Menu

Adjustment Point

Signal/Setting

Adjustment Contents

q

Sub colour

SCOLOR

Connect the synchroscope 100% colour bar Adjust the yellow amplitude of the colour bar

adjustment

to 4PIN (VB) of TP1900.

signal (white level to yellow peak level) to
2.5

±

0.1Vpp.

 

w

Confrontation

COM

Specified adjustment jig

No input state

When using the specified adjustment jig

bias adjustment

(illuminometer) or visual

Brightness: Center Connect the output of jig to the oscilloscope

observation

Perform it in a

and adjust the waveform to the minimum

combination of

point.

PWB and the

At this time, perform the adjustment several

liquid crystal

times to fix the optimal point because the

panel which will measuring value hardly changes around the
be supplied as

optimal point.

products finally.

In case of visual adjustment Stand or tilt the
panel as shown in the figure and check by
shaking your head and seeing whether stripes
appear.
If the adjustment is improper, you will see
stripes in the longitudinal direction.
Perform the adjustment so that they
do not appear.

[Another method] [Another method]
Flicker signal

Externally input the signal shown left and

generator

adjust so that the cross bars become minimum

“Example:

by visually checking the screen.

BP1018 made
by JFC”

e

OSD position

OSDH

OSD character

The position of the adjustment value on the

adjustment

visual observation

right end of the OSD character is adjusted to

15mm 

±

 2mm from the right end of the image

plane.

r

Lighting control

BBRIGHT

Check that the BBRIGHT is “76”.

standard check

(Type drawing)

Optimal point

Adjust within the above 
range to fix the optimal point

Direction of stripe

15mm

2.5V

±

0.1

White

Yellow