Read Sharp LC-37GD1E (serv.man8) Service Manual online
25
LC-32GD1E
LC-37GD1E
LC-37GD1E
A
data bit is missing.
When the P
A
TTERN 1 setting in the
adjustment process menu is changed
from 00 to 02 is the gradation pattern
displayed correctly?
Connect SC4651 and
SC4652(P
ANEL), and check the
IC4501(LCD-CONT) peripheral
circuit.
When P
A
TTERN1 is selected from
the adjustment process menu and
P
A
TTERN3 is set to 1, is the
gradation pattern displayed
correctly?
Check IC4702, IC4902(64M-
SDRAM), and their peripheral
circuits.
When P
A
TTERN3 in the adjustment
process menu is set to 4, is the
pattern correctly displayed with
even dot signals?
Check between IC4701 and
IC4501(QS-DRIV).
When P
A
TTERN3 in the adjustment
process menu is set to 5, is the
pattern correctly displayed with odd
dot signals?
Check the IC2206 peripheral circuit.
Check between IC4901(QS-DRIV)
and IC4501(LCD-CNT).
No
Ye
s
No
Ye
s
No
Ye
s
Ye
s
No
When the QS driver is activated,
noise is seen in the images.
Check IC4701(QS-DRIV),
IC4901(QS-DRIV), and the
peripheral circuits.
Are the INVER
TER-A
GND PWB
and the LCD CONT
PWB properly
connected with a cable?
(GV
-
Connector)
Is the OSTEMP
AD value on other
Page 2 of the process adjustment
mode set to 255?
Connect them properly or replace
the cable.
Are the INVER
TER-A
GND PWB
and the INVER
TER-B GND PWB
properly connected with a board-to-
board connector? (GJ-Connector)
Connect them properly
.
Is 5V present at pin 62 (OSTEMP)
on IC2004 (the microcomputer)?
The thermistor on the INVER
TER
GND PWB is defective.
Pin 62 on IC2004 (the micro
computer)is defective.
No
Ye
s
No
Ye
s
No
Ye
s
Ye
s
No
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