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
PREV: Sharp LC-32GA3E (serv.man7) Service Manual

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

40
LC-32GA3E
LC-37GA3E
TROUBLE SHOOTING TABLE
 (Continued)
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<Signals>
<COMPONENT
, RGB signal> input 
No video output (2) 
External input in trouble <lNPUT
-1 > 
Is Input 1 selected in the input switching 
menu screen? 
Select Input 1 and the input signal in 
the input swltching menu screen.
Is there video signal input at each video 
input terminal of IC3805 (A
V SWITCH)?
(RGB signal input)
Are there RGB signals input at pins (63), 
(61) and (59) ? 
(RGB signal input)
Check between pins (15), (1
1) and (7) 
of SC1
101 and pins (63), (61) and (59) 
of IC3805 . 
External input in trouble <lNPUT
-3> 
Is Input 3 selected in the input switching menu screen?
Select Input 3 and the input signal in the input 
switching menu screen.
Is there video signal input at each video input terminal of 
IC3805(A
V SWITCH)?
(COMPONENT
 input)
Are there 
Y
, Pb and Pr signals input at pins (15), (17) and (19) ?
(RGB signal input)
Are there RGB signals input at pins (9), (5) and (7)? 
(COMPON ENT
 input)
Check between pins (2), (7) and (4) of J1
101 and pins 
(15), (17) and (19) of IC3801.
(RGB signal input)
Check between pins (15), (1
1) and (7) of SC1
103 and 
pins (9), (5) and (7) of IC3805 . 
Are there MAIN VIDEO signals output at pins (50), (48) and (46) (Y
, Pb and Pr signals) , P
ASS VIDEO signals output at pins (38)
, (36) and (34) (Y
, Pb and Pr signals) and SUB VIDEO signal output at pins 
(44), (42) and (40) (Y
, Pb and Pr signals) of IC3805? 
<MAIN>
RGB Signals 
Are there MAIN VIDEO signals input to pins 
(24), (29) and (32) (Y
, Cb and Cr) of IC502 
(2D-YC & CHROMA) form pins (50), (48) 
and (46) (Y
, Pb and Pr) of IC3805 ? 
Check between IC3805 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>
RGB / COMPONENT
Signals 
Are there VIDEO signals input to pins (8), (10) 
and (13) (Y
, Pb and Pr) of IC600 (L.P
.F
.) form pins 
(44), (42) and (40) (Y
, Pb and Pr) of IC3805 ?
Check between IC3805 and IC600. 
Are there SUB VIDEO signal input to pins (2), 
(1) and (3) (Y
, Cb and Cr) of IC601 (2D-YC & 
CHROMA)? 
Check between IC600 and IC601. 
Are there digital video signal output at pins (31) 
-(40) and (41) - (50) of IC601 ?
Check IC601 and the peripheral circuits. 
<MAIN>
COMPONENT
 Signals 
Are there VIDEO signals input to pins (9), (12) and 
(14) (Y
, Pb and Pr) of IC401 (L.P
.F
.) form pins (38), 
(36) and (34) (Y
, Pb and Pr) of IC3805 ? 
Check between IC3805 and IC401 .
Are there MAIN VIDEO signal input to pins (8), 
(18) and (20) (Y
, Cb and Cr) of IC402 (3D-YC & 
CHROMA)? 
Check between IC401 and IC402.
Are there digital video signal output at pins 
(124) - (133) and (140) - (159) of IC402?
Check IC402 and the peripheral circuits. 
Check IC3805 (A
V SWITCH) 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), an
d 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)(TCLK
-), (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+) of IC3201?
Check IC3201 (L
VDS_TRANSMlTTER) and 
the peripheral circuits.
Check the LCD CONTROL
 PWB.
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)
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