DV-L80 (serv.man16). Complete - Sharp DVD Service Manual (repair manual). Page 11

  Adjustment Item

Adjustment Menu

Adjustment Point

Signal/Setting

Adjustment Contents

1

Sub-bright

S brightness

Check that the sub-bright is “56”.

check

2

Common

GPOS

Connect the synchroscope Black-and-white Adjust the common amplitude to 8.0V.

amplitude

to 1 pin (COM) of TP1800. 10STEP

adjustment

3

RGB amplitude

GAIN

Connect the synchroscope Black-and-white Adjust the Vpp(SYNC-SYNC) of VG to 4.0V.

adjustment

to 2PIN (VG) of TP1800.

10STEP

4

Contrast

CONT

Connect the synchroscope Black-and-white Adjust the 100% white part(SYNC-white) to

adjustment

to 2PIN (VG) of TP1800.

10STEP

3.8V.

5

White balance

WB.R(Red)

Connect the synchroscope Black-and-white Adjust the white balance (red) so that black level

adjustment

to 2PIN (VG) and 3PIN

10STEP

the equal of green and red output become equal.

(Red)

(VR) of TP1800.

6

White balance

WB.R(Blue)

Connect the synchroscope Black-and-white Adjust the white balance (red) so that black level

adjustment

to 2PIN (VG) and 4PIN

10STEP

the equal of green and blue output become

(Blue)

(VB) of TP1800.

equal.

7

Sub tint

S color tone

Connect the synchroscope 100%  color  bar

Adjust so that the cross bars of the color signal

adjustment

to 4PIN (VB) of TP1800.

may become the minimum with seeing LCD
screen.
[Another method]
Adjust so that every horizontal term space my
become the level which the blue amplitude level
of the color bar signal is the same as.

8

Sub color

S color density

Connect the synchroscope 100% color bar

Adjust the blue amplitude of the color bar

adjustment

to 4PIN (VB) of TP1800.

(black level to peak level) to 3.4

±

0.1Vpp.

9

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.

8.0V

±

0.1

4.0

±

0.1V

3.8V

±

0.1

(Type drawing)

Optimal point

Adjust within the above 
range to fix the optimal point