DOWNLOAD Sharp LC-20C2E (serv.man4) Service Manual ↓ Size: 91.69 KB | Pages: 13 in PDF or view online for FREE

Model
LC-20C2E (serv.man4)
Pages
13
Size
91.69 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Part 2 - Troubleshooting, Block diagrams - p14-28
File
lc-20c2e-sm4.pdf
Date

Sharp LC-20C2E (serv.man4) Service Manual ▷ View online

17
LC-20C2E
TROUBLE SHOOTING TABLE
 (Continued)
No picture
Check all the settings microprocessor's adjust process menu.
Is source GND 
normal?
Is CSCOM 
waveform 
normal?
Check R1212 
and their 
peripheral parts.
Check IC1109, 
Q1101, Q1102, 
D1101, R1120, 
R1130 and their 
peripheral parts.
Check R1231 
and their 
peripheral parts.
Yes
No
No
Becomes
dark
No
Time passes,
becomes 
dark
Is gate GND 
normal?
Is gate clock
(GCK) normal?
Check R1223 
and gate aray 
peripheral parts.
Yes
No
Check D1201 
and their 
peripheral parts.
No
Is B-5.5V being 
outputted?
Is VCC being 
outputted?
Check T701's 
secondary +5V
outputs line?
Yes
No
Is GSP 
waveform 
normal?
Check R1223 
and their 
peripheral parts.
Yes
No
Becomes
white.
Is 3.3V VHS 
being 
outputted?
Is source clock 
normal?
Check +3.3V 
outputs line of 
IC752.
Check R1210, 
R1211 and their 
peripheral parts.
Check FB1203 
and gate aray 
peripheral parts.
Is output of LBR 
and HG 
normal?
Yes
Yes
No
No
No
Vertical line 
output
No picture
Check all the settings microprocessor's adjust process menu.
Is output of 
R0~R5 
normal?
Is output of 
G0~G5 
normal?
Is output of 
B0~B5 
normal?
Check R1202,  
R1203 and their 
peripheral parts.
Check R1204,  
R1205 and their 
peripheral parts.
Check R1206,  
R1207 and their 
peripheral parts.
Check T701's 
secondary +5V 
outputs line.
Yes
Yes
No
No
Colour is 
unusual
Is VLS 5V 
being 
outputted?
No
Picture 
image is 
gloomy
Is in/output of 
SPIO and 
SPOI normal?
Check R1209 
and their 
peripheral parts.
No
No picture
image 
inversion
Is output V0, 
V16, V32, V48 
and V63 
normal?
Check IC1106, 
IC1107, IC1108 
and their 
peripheral parts.
No
Gradation
defect
Is output of U/D
 normal?
Check Q1201 
and their 
peripheral parts.
Yes
No
18
LC-20C2E
TROUBLE SHOOTING TABLE
 (Continued)
No sound
Check all the settins microprocessor's adjust process menu.
Is the pin 53 of 
IC2001 in the 
"L" state?
Is output at pins
26 and 27 of 
IC901 normal?
Is output at pins
1 and 7 of 
IC903 normal?
Yes
Yes
No
No
No
No
No
No sound 
from front 
speakers
Is output at pins
1 and 7 of
IC303 normal?
Yes
Is output at pins 
8 and 12 of 
IC3305 normal?
Yes
Muting effect is 
on. Check the 
FSMUTE line.
Check IC901 
and their 
peripheral parts.
Check IC903 
and their 
peripheral parts.
Check IC303 
and their 
peripheral parts.
Check IC3305 
and their 
peripheral parts.
Check front 
speaker and 
connection 
cable.
Yes
Is the pin 53 of 
IC2001 in the 
"L" state?
Is output at pins
26 and 27 of 
IC901 normal?
Is output at pins
1 and 7 of 
IC903 normal?
Yes
Yes
No
No
No
No
No
No
Is output at pins
1 and 7 of
IC303 normal?
Yes
Is output at pins 
8 and 12 of 
IC3305 normal?
Yes
Muting effect is 
on. Check the 
FSMUTE line.
Check IC901 
and their 
peripheral parts.
Check IC903 
and their 
peripheral parts.
Check IC303 
and their 
peripheral parts.
Check IC3305 
and their 
peripheral parts.
Yes
Is output at 
Q301 normal?
Check Q301 
connection
cable.
No sound 
from 
headphone
TV sound 
failure
Is output at pins
37 and 38 of 
IC901 normal?
Is output at pins
1 and 7 of 
IC902 normal?
Check IC901 
and their 
peripheral parts.
Check IC902 
and their 
peripheral parts.
Yes
No
No
No
No sound 
from output 
line
Is output at pin
1 of W7 tuner
normal?
Is input at pin
67 of IC901 
normal?
Check the tuner 
and their 
peripheral parts.
Check IC901, 
MONOS/SIF 
line  and their 
peripheral parts.
Yes
No
19
LC-20C2E
1
2
3
4
5
6
7
8
9
10
A
B
C
D
E
F
G
H
I
J
CHASSIS LAYOUT
INVERTER A Unit
INVERTER B Unit
20
LC-20C2E
1
2
3
4
5
6
7
8
9
10
A
B
C
D
E
F
G
H
I
J
MAIN Unit (Side-A)
MAIN Unit (Side-B)
Page of 13
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Sharp LC-20C2E (serv.man4) Service Manual ▷ Download

  • DOWNLOAD Sharp LC-20C2E (serv.man4) Service Manual ↓ Size: 91.69 KB | Pages: 13 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp LC-20C2E (serv.man4) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp LC-20C2E (serv.man4) LCD. Information contained in Sharp LC-20C2E (serv.man4) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.