DOWNLOAD Sharp LC-32GA3E (serv.man8) Service Manual ↓ Size: 46.59 KB | Pages: 12 in PDF or view online for FREE

Model
LC-32GA3E (serv.man8)
Pages
12
Size
46.59 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Trouble Shooting
File
lc-32ga3e-sm8.pdf
Date
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43
LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
 (Continued)
NO
YES
YES
YES
NO
NO
NO
NO
NO
Are there RGB signal inputs at pins 
(25), (26) and (27), and Hsync/Vsync 
signal inputs at pins (28) and (8) from 
DVI connector (SC1900)?
Is each signal sent from Hsync and 
Vsync (pin 4, 6), of IC1904 
(INVERTER)?
Are DVI_SR/SG/SB and DVI_H/V 
signals sent from MD connector?
Are outputs at pins (12) and (14) of 
IC1917(CONTROL) both (H, L)?
Check PC settings.
Check IC1915 and its 
peripheral circuits.
Check IC1917 and its 
peripheral circuits.
Check IC1904 and its peripheral 
circuits.
Check IC1901, IC1903 and their 
peripheral circuits.
Do output pins (12) and (14) of IC1917 
become (L, L) when digital AV mode is 
entered?
NO
YES
YES
Check ME connector I2C signal line.
Are IC1915(E2PROM) data accessed 
by I2C when connected to PC?
Are DVI_SR/SG/SB and DVI_H/V 
signals supplied to IC3700 (ADC) 
and 3701 (SYNC_SELECTOR) on 
the main PWB?
Check MD harness for disconnection.
YES
Check IC3700, IC3701 and their 
peripheral circuits.
YES
Image from DVI input does not appear (Analog PC is not displayed) (2)
44
LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
 (Continued)
NO
YES
YES
YES
NO
NO
NO
NO
NO
Are there Rx0, 1, 2 and C signal 
inputs to IC1900 (HDCP_LSI)?
Are signals sent from Hsync (pin 18), 
Vsync (pin 19) and RGB (pins 23, 26 
and 31) of IC1900?
Are DVI_SR/SG/SB and DVI_H/V 
signals sent from MD connector?
Are outputs at pins (12) and (14) of 
IC1917 both (H, H)?
Check PC settings.
Check IC1911 and its 
peripheral circuits.
Check IC1917 and its 
peripheral circuits.
Check IC1900 and its peripheral 
circuits.
Check IC1901, IC1903 and their 
peripheral circuits.
Do output pins (12) and (14) of IC1917 
become (H, L) when analog PC mode 
is entered?
NO
YES
YES
Check ME connector I2C signal line.
Are IC1911 data accessed by I2C 
when connected to PC?
Are DVI_SR/SG/SB and DVI_H/V 
signals supplied to IC3700 (ADC) 
and 3701 (SYNC_SELECTOR) on 
the main PWB?
Check MD harness for disconnection.
YES
Check IC3700, IC3701 and their 
peripheral circuits.
YES
Image from DV1 input does not appear (digital AV is not displayed) (3)
45
LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
 (Continued)
NO
YES
YES
YES
NO
NO
NO
NO
NO
Are there RGB signal inputs at pins 
(25), (26) and (27), and Hsync/Vsync 
signal inputs at pins (8) and (28) from 
DVI connector (SC1900)?
Are there Vsync and Hsync signal 
outputs at pins (4) and (6) of IC1904 
(INVERTER)?
Are DVI_SR/SG/SB and DVI_H/V 
signals sent from MD connector?
Are outputs at pins (12) and (14) of 
IC1917(CONTROL) both (L, L)?
Check PC settings.
Check IC1915 and its 
peripheral circuits.
Check IC1917 and its 
peripheral circuits.
Check IC1904 and its peripheral 
circuits.
Check IC1901, IC1903 and their 
peripheral circuits.
Do output pins (12) and (14) of 
IC1917 become (H, H) when digital 
PC mode is entered?
NO
YES
YES
Check ME connector I2C signal line.
Are IC1911(E2PROM) data accessed 
by I2C when connected to PC?
Are DVI_SR/SG/SB and DVI_H/V 
signals supplied to IC3700 (ADC) and 
3701 (SYNC_SELECTOR) on the 
main PWB?
Check MD harness for disconnection.
YES
Check IC3700, IC3701 and their 
peripheral circuits.
YES
Image from DV1 input does not appear (Analog AV is not displayed) (4)
46
LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
 (Continued)
YES
YES
NO
YES
NO
NO
NO
YES
YES
NO
YES
YES
NO
YES
NO
NO
NO
YES
250ms
1sec
No sound or picture comes out.
No picture comes out.
Is the power LED lit up in green?
Is the power LED blinking in red?
Is the AC cord normal?
Blinking once? (At regular intervals)
Blinking once?
Blinking twice?
Blinking five times?
Blinking six times?
Is the Backlight off?
To "The backlight does not go on."
Is there the clock output at pin (40) of IC4602?
Does the adjustment process menu appear?
Check IC4501 and its peripheral circuits.
Check IC4701, IC4901 and their peripheral circuits.
Check the FFC (LV, SC3200, SC4601) connections between the 
main PWB and LCD control PWB.
To "No picture comes out."
Table of power LED blinking timing at error occurrence
Type of error
Power supply error
Blinking once: Slow
H: ON
L: OFF
H: ON
L: OFF
H: ON
L: OFF
H: ON
L: OFF
H: ON
L: OFF
Lamp error
Blinking once: Fast
Panel power supply error
Blinking twice
In-set temperature error
Blinking five times
Fan error
Blinking six times
Power LED operation (1 cycle)
To "The backlight does not go on."
Check the panel power supply circuit.
Check the temperature of the set.
Check the fan motor and its peripheral circuits.
NO
YES
Blinking seven times?
Check the temperature of the 1-bit amplifier 
unit.
Check the power unit.
CCKM and D5V line are not defective.
YES
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