LC-32GD1E (serv.man8). Troubleshooting table — Sharp TV Service Manual (repair manual)

Model
LC-32GD1E (serv.man8)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
19.44 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting table
File
lc-32gd1e-sm8.pdf
Date

View Sharp LC-32GD1E (serv.man8) Service Manual online

24
LC-32GD1E
LC-37GD1E
TROUBLE SHOOTING TABLE
No picture and no sound
Is the power LED lit green?
Is the power LED flashing red?
Did it flash once?
Did it flash twice?
Did it flash five times?
Did it flash six times?
Go to "No picture".
Does the backlight fail to light?
Check the lamp and the peripheral 
lamp circuit.
Is the power cord normal?
Replace the power cord.
Go to "The backlight does not light."
Check the power unit.
Check the temperature of the unit.
Check the fan connection.
Ye
s
No
No
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
T
ype of error
LED operation (1 cycle)
Cable error
A
VC power error
Flashes once: Slow
H: Lit
L: Not lit
Lamp error
Flashes once: Fast
H: Lit
L: Not lit
Monitor power error
Flashes twice
H: Lit
L: Not lit
Monitor temperature 
error
H: Lit
L: Not lit
Monitor F
AN error
Flashes 6 times
H: Lit
L: Not lit
LED flashing timing chart
250ms
1s
25
LC-32GD1E
LC-37GD1E
A
 data bit is missing.
When P
A
TTERN1 is selected from 
the adjustment process menu and it 
is set to 2, is the gradation pattern 
displayed correctly?
Connect SC4651 and 
SC4652(P
ANEL), and check the 
IC4501(LCD-CONT) peripheral 
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 
When P
A
TTERN3 in the adjustment 
process menu is set to 4, is the 
pattern correctly displayed at one-
dot intervals?
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 at one-
dot intervals?
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 GND1 PWB and the LCD 
CONT
 PWB properly connected 
with a cable?
Is the OSTEMP
 AD value on the 
third page of the process 
adjustment mode set to 255?
Connect them properly or replace 
the cable.
Are the GND1 PWB and the GND2 
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 GND PWB is 
defective.
Pin 62 on IC2004 (the micro 
computer)is defective.
(GV
-Connector)
No
Ye
s
No
Ye
s
No
Ye
s
Ye
s
No
26
LC-32GD1E
LC-37GD1E
The display is entirely whitish or 
dark. (LCD power)
When the 
A
VC system is connected 
and the picture is checked, is the 
display all white or all black?
Check the 
A
VC system.
Check the supply voltage supplied 
to the panel.
(Check it at SC4651 and SC4652.)
Remove the FPC that is connected 
to SC4651 and SC4652.
(T
o prevent the panel from breaking)
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?
(Is it too light or too dark?)
Ye
s
Ye
s
No
No
The backlight does not light.
Has the fuse for F7401 or F7501 
blown?
Check the circuits after replacing 
the fuse.
Is power supplied to each inverter 
PWB?
Is the control signal (OFL1/2,  INV
-
OSC) being output at pins 3, 4, and 
5 of P7705 on the LCD CONT
 
Check the fluorescent lamp 
connector and the inverter circuit.
See if the cable is connected 
between PWBs.
Check the IC4501 (LCD-CONT) 
peripheral circuits.
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
27
LC-32GD1E
LC-37GD1E
No video output (Display)
TMDS-RX:
Is RESET terminal at pin (3) of 
IC2206 (TMDS-RE) at "H" level?
TMDS-RX:
Is CLOCK (91.3MHz) output 
available at pin (102) of IC2206 
(TMDS-RE)?
LCD CONT UNIT:
Is CLOCK output available at pin 
(40) of IC4602 (LVDS-RX)?
TMDS-RX:
See if X2201 (16.71MHz) leading to 
pin (161) of IC2206 is oscillating. 
Also check the peripheral circuits.
TMDS-RX:
Check the peripheral circuits of 
IC2206 (TMDS-RE).
Check the FFC (LV) connection 
between TMDS-RX PWB and LCD 
CONT PWB.
Check the peripheral circuits of 
IC4501 (LCD CONT).
LCD CONT UNIT:
Check IC4701 (QS-DRIV), IC4901 
(QS-DRIV) and the peripheral 
circuits.
Is the adjustment process mode 
menu displayed?
No audio output (Display)
Is audio signal available at 
DISPLAY OUTPUT3 connector 
(J2201)?
Is audio signal available at SO 
connector (P2201)?
Is audio signal available at SO 
connector (P202)?
Check if AVC Center is generating 
audio output.
Check the connection between 
J2201 and SO connector.
Check SO connector (P202).  
Replace if necessary.
Correct the wiring, or replace the 
wire.
Check the wire connections in the 
speaker assembly.
Is audio signal available in the 
speaker assembly?
Replace the speaker, or check the 
peripheral connections.
Is speaker wired to audio output 
terminal (P203) correctly?
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
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Download Sharp LC-32GD1E (serv.man8) Service Manual (Repair Manual)

Here you can view online or download Sharp LC-32GD1E (serv.man8) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp LC-32GD1E (serv.man8) LCD. Information contained in Sharp LC-32GD1E (serv.man8) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).