DOWNLOAD Sharp LC-15A2E (serv.man2) Service Manual ↓ Size: 299.49 KB | Pages: 15 in PDF or view online for FREE

Model
LC-15A2E (serv.man2)
Pages
15
Size
299.49 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / text - page 1-15
File
lc-15a2e-sm2.pdf
Date

Sharp LC-15A2E (serv.man2) Service Manual ▷ View online

LC-15A2E
9
PAL/PAL60
SECAM
NTSC
y delay
6
11
RF
tint offset
0
0
sub contrast
2
2
sub colour
25
25
y delay
7
10
8
AV1
tint offset
0
0
0
AV2
sub contrast
2
2
2
sub colour
30
30
30
y delay
7
10
8
AVS
tint offset
0
0
0
sub contrast
2
2
2
sub colour
30
30
30
AGC gain start
27
3-1. +B adjustment
Page 9 of MAIN side adjustment process  +B-ADJ
Adjust the voltage of the pin 49 of SC401 to 5.0V
±
0.05V.
3-2. Model setting
Page 9 of MAIN side adjustment process  MODUL
Set to A2E.
3-3. Inch size setting
Page 9 of MAIN side adjustment process  INCH SIZE
Set to 15.
3-4. COMMON BIAS adjustment of LCD module
Page 9 of MAIN side adjustment process  COM BIAS
Input the picture of gray scale and adjust it so as to obtain the best contrast.
3-5. CUTOFF adjustment
Page 9 of MAIN side adjustment process  R CUTOFF, B CUTOFF
Adjust it so as to obtain the optimal colour balance.
LC-15A2E
10
TROUBLE SHOOTING TABLE
No picture, No sound
Check all the settings microprocessor's adjust process menu.
Do F2, F3 and F4 
function?
Are T701's secondary 
outputs, +38V, +16V, +9V, 
+5V and -8V normal?
Remove F2, F3 and F4 
and check the load side.
Is there short-circuiting?
Is there short-circuiting of 
T701 primary side periphery, 
Q701, Q710 and S4701.
Replace F2, F3 and F4.
Check S4701 and 
connection cable.
Is T701's primary oscillator 
waveform normal?
Check T701's secondary 
load.
Yes
Yes
No
No
No
No
Yes
Fluorecent lamp failure to light up
Does F1 function?
Is the pin 34 of IC1201 in 
the "H" state?
Is the Q754 short-circuiting?
Is there short-circuiting of 
T751 and T752 primary 
side periphery, Q751~Q753.
Yes
Yes
No
No
No
Yes
Replace the fluorecent lamp 
with new one and check 
again.
Yes
Check the OFL1 line, IC1201 
and their peripheral parts.
Check Q754 and their 
peripheral parts.
Check T751, T752, 
Q751~Q753 and connection 
cable.
LC-15A2E
11
TROUBLE SHOOTING TABLE
 (Continued)
No picture
Check all the settings microprocessor's adjust process menu.
Is in/output of 
IC802 normal?
Is in/output of
IC1201 normal?
Check IC802 
and its 
peripheral parts.
Check IC1201 
and its 
peripheral parts.
Check IC402 
and its 
peripheral parts.
Check IC802, 
AV1 line and its 
peripheral parts.
Check LCD 
panel voltages 
and waveform.
Yes
Yes
No
No
No picture 
at all
Is in/output of 
IC402 normal?
Is input at pin 
73 of IC802 
normal?
Yes
No
No
No TV and 
VIDEO 1 
output
Is voltages at 
pin 3 of W7 and 
pins 3, 4, 5 of 
W14 tuner
normal?
Is output at pin 
2 of W7 tuner 
normal?
Check the 
power line.
Check tuner 
and its 
peripheral parts.
Is input at pin 
3 of IC402 
normal?
Is the pins 2 
and 4 of IC402 
at "H" and "L" 
state?
Yes
Yes
No
No
No
No
No
Yes
No TV output
Is the pins 65 
and 66 of 
IC2001 at "H" 
and "L" state?
Yes
Check the its 
line.
Check the its 
line.
Check IC402 
and its 
peripheral parts.
Is input at pin 
1 of IC402 
normal?
Is the pins 2 
and 4 of IC402 
at "L" state?
Check the its 
line.
Check the its 
line.
Check IC402 
and its 
peripheral parts.
Is the pins 65 
and 66 of IC2001 
at "L" state?
Yes
Yes
No
No
No
No VIDEO 1 
output
LC-15A2E
12
TROUBLE SHOOTING TABLE
 (Continued)
No picture
Check all the settings microprocessor's adjust process menu.
Is input at pin 
74 of IC802 
normal?
Check the AV2 
line and their 
peripheral parts.
Check the W9, 
SY-line, SC-line 
and their 
peripheral parts.
No
No VIDEO 2
output
Is input at pins 
71 and 72 of 
IC802 normal?
No
No S-VIDEO 
output
Is input at pin 
70 of IC802 
normal?
Check the 
V2VO line and 
their 
peripheral parts.
No
No line 
output
Is input at pins 
1, 2, 3, 56, 57 
and 79 of IC802 
normal?
Is output at pins 
11, 13 and 16 
of I4 normal?
Check IC802 
and their 
peripheral parts.
Check I13 and 
their 
peripheral parts.
Check I9 and 
their 
peripheral parts.
Check I4 and 
their 
peripheral parts.
Is output at pins 
11, 13 and 16 
of I13 normal?
Yes
Yes
No
No
No
No TELETEX 
output
Is output at pins 
44~49 of I9 
normal?
Yes
No
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