DOWNLOAD Sharp LC-32GD8EK (serv.man10) Service Manual ↓ Size: 336.25 KB | Pages: 17 in PDF or view online for FREE

Model
LC-32GD8EK (serv.man10)
Pages
17
Size
336.25 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Tables
File
lc-32gd8ek-sm10.pdf
Date

Sharp LC-32GD8EK (serv.man10) Service Manual ▷ View online

56
 LC-26GA5E
 LC-32GA5E
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
40
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
NO
YES
YES
Do all the fluorescent tubes light up?
Check the individual fluorescent 
tubes for light-up failure.
NO
Is the specified control signal 
inputted at IC7501 (INV-CTL) on the 
inverter unit?
Check the line between CN7502 and 
IC7501.
NO
Are the Q7528 and Q7525 
transistors at the primary side of 
T7501 functioning?
Replace IC7501 (INV-CTL) or check 
its peripheral circuits.
NO
Is the secondary circuit of T7501 
functioning?
Replace T7501 or the T75** 
transformer for the fluorescent tubes, 
or check their peripheral circuits.
Replace any defective fluorescent 
tube (s) with new one (s).
NO
YES
Replace the blown-out F7501 fuse on 
the inverter unit. Turn on the power 
again. If the fuse gets blown out 
again, check the short-circuited spot.
Check T7501 and T7502 and their 
peripheral circuits as well as IC7501 
and their peripheral circuits.
NO
YES
YES
Is the power supplied to CN7501 on 
the inverter unit?
Is the F7501 fuse in the inverter unit 
circuit functioning?
Check the connection between 
power unit and inverter unit.
NO
NO
Are there the INV-OFL, INV-OSC, 
INV-STB (ON/OFF) signals at P1701 
on the main PWB?
Check pins (5), (7) and (8) of IC1710 
(main PWB).
YES
YES
YES
YES
Are there control signals (INV-OFL,  
INV-BRT, INV-OSC, INV-STB (ON)) 
at CN7502 on the inverter unit?
NO
Check the circuit connected with the 
VCC terminal on the inverter control 
IC (IC7501).
Is the VCC power supplied to the 
inverter control IC (IC7501) on the 
inverter unit?
Backlight failure to light up
<37”>
Troubleshooting Table (continued)
57
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
41
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
LCD failure
Does a single or several vertical stripes 
appear on the LCD screen?
Does a single or several horizontal 
stripes appear on the LCD screen?
Do luminescent or black dots appear on 
the screen?
Is the on-screen image rippling or 
distorted?
The backlight functions. Is there an 
image on the LCD screen (screen not 
black)?
Does the entire LCD screen look whitish 
all over?
Does the QS drive function?
Are there data bit drop-outs? 
(No solution even when turning on and 
off the QS drive)
Is the gamma correction as specified?
Replace the LCD panel.
Replace the LCD control unit.
Troubleshooting Table (continued)
57
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
41
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
LCD failure
Does a single or several vertical stripes 
appear on the LCD screen?
Does a single or several horizontal 
stripes appear on the LCD screen?
Do luminescent or black dots appear on 
the screen?
Is the on-screen image rippling or 
distorted?
The backlight functions. Is there an 
image on the LCD screen (screen not 
black)?
Does the entire LCD screen look whitish 
all over?
Does the QS drive function?
Are there data bit drop-outs? 
(No solution even when turning on and 
off the QS drive)
Is the gamma correction as specified?
Replace the LCD panel.
Replace the LCD control unit.
Troubleshooting Table (continued)
57
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
41
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
LCD failure
Does a single or several vertical stripes 
appear on the LCD screen?
Does a single or several horizontal 
stripes appear on the LCD screen?
Do luminescent or black dots appear on 
the screen?
Is the on-screen image rippling or 
distorted?
The backlight functions. Is there an 
image on the LCD screen (screen not 
black)?
Does the entire LCD screen look whitish 
all over?
Does the QS drive function?
Are there data bit drop-outs? 
(No solution even when turning on and 
off the QS drive)
Is the gamma correction as specified?
Replace the LCD panel.
Replace the LCD control unit.
Troubleshooting Table (continued)
Page of 17
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