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

Sharp LC-32GA3E (serv.man8) Service Manual ▷ View online

41
LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
 (Continued)
NO
YES
YES
YES
YES
NO
NO
YES
YES
YES
YES
NO
NO
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
YES
NO
NO
No video output (3)
No 
TV video outpuut. 
Is 
TV selected in the input switching menu 
screen? 
Select 
TV in the input switching menu 
screen. Check that "Audio Only" is "Of
f".
Is there 
TV video signal output at pin (17) of 
T
uner? 
Check tuner and and the peripheral circuits.
Is there 
TV video signal output at pin (5) (TP1
183) 
of IC1
106 (LEVEL
 ADJ.)? 
Is there LEVEL
 CTL
 signal input to pin (6) of 
IC1
106 from IC1
108? 
Is there 
TV video signal input at pin (63) of 
IC3801 (A
V SWITCH)? 
Are there VIDEO signals input at pin (8) of IC401 (MAIN L.P
.F
.) and pin (2) of IC600 (SUB L.P
.F
.)? 
Check IC3801 (A
V SWITCH) and the 
peripheral circuits.
Are there MAIN VIDEO signal output at pin (56) and SUB VIDEO signal output at pin (44) of IC3801 ? 
Check between IC3801 and IC401/lC600. 
<MAIN>
3D-Y/C (P
AL) 
Is there video signal input at pin (8) of IC402 
(MAIN 3D-YC & CHROMA) ? 
Check between IC401 and IC402. 
Are there digital video signal outputs at pins 
(124)-(133) and (140)-(159) of IC402? 
Check IC402 and the peripheral circuits.
<MAIN>
2D-Y/C (SECAM) 
Is there video signal input at pin (12) of IC502 
(MAIN 2D-YC & CHROMA) ? 
Check between IC401 and IC502. 
Are there digital video signal outputs at pins 
(1
15)-(126) and (133)-(144) of IC502?
Check IC502 and the peripheral circuits.
<SUB> 
Is there video signal input at pin (72) of IC601 
(SUB 2D-YC & CHROMA) ?
Check between IC401 and IC601. 
Are there digital video signal outputs at pins (31)-
(40) and (41)-(50) of IC601 ?
Check IC601 and the peripheral circuits. 
Are there digital video signal inputs at pins (53), (54), (57)-(60), (51), (52) (RE0-7), pins(63)-(68), (61), (62) (GE0-7), pin
s (73)-(78), (69), (70) (BE0-7), pins (81)-(86), (79), 
(80) (RO0-7), pins (91)-(96), (89), (90) (GO0-7), pins (99), (100), (1), (2), (5), (6), (97), (98) (BO0-7), and pins (7)-(10) (
HSYNC, VSYNC, DE, CLKIN) of IC3201 (L
VDS 
TRANSMITTER)? 
Replace the main PWB, or check between 
IC402/IC502/IC601 and IC3201 . 
Are there digital video signal outputs at pins (49)(T
A1-), (48)(T
A1+), (47)(TB1-), (46)(TB1+), (44)(TC1-), (43)(TC1+),(41 )(TCL
K-), (42)(TCLK+), (40)(TD1- ), (39)(TD1+), 
(37)(T
A2-), (36)(T
A2+), (35)(TB2-), (34)(TB2+), (32)(TC2-), (31)(TC2+), (30)(TCLK2-),(29)(TCLK2+), (28)(TD2-)  and (27)(TD2+) o
f IC3201? 
Check IC3201 (L
VDS 
TRANSMITTER) and the 
peripheral circuits. 
Check the LCD CONTROL
 PWB.
42
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)?
Is each signal 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 IC1915 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 (L, L) when analog 
AV mode is entered?
NO
YES
YES
Check ME connector I
2
C signal line.
Are IC1915 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
<Signal mode>
Image from DVI input does not appear (digital PC is not displayed) (1)
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)
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