Sharp LC-22SV2E (serv.man2) Service Manual ▷ View online
21
LC-22SV2E
TROUBLE SHOOTING TABLE
(Continued)
Check all the settings microprocessor's adjust process menu.
Is in/output of
IC801 normal?
Is in/output of
IC4101 normal?
Check IC801
and its
peripheral parts.
Check IC4101
and its
peripheral parts.
Check IC3402
and its
peripheral parts.
Check IC801,
AV1 line and its
peripheral parts.
Is in/out of
IC4561 normal?
Check IC4561
and its
peripheral parts.
Check LCD
panel voltages
and waveform.
Is in/output of
IC3402 normal?
Is input at pin
(73) of IC801
normal?
Is voltages at
pins (6), (7)
and (18) of
tuner normal?
Is output at pin
(13) of tuner
normal?
Check the
power line.
Check tuner
and its
peripheral parts.
Is input at pin
(3) of IC3402
normal?
Is the pins (2)
and (4) of
IC3402 at "H"
and "L" state?
Check the pins
(65) and (66) of
IC2001 at "H"
and "L" state.
Check the its
line.
Check IC3402
and its
peripheral parts.
Is input at pin
(1) of IC3402
normal?
Is the pins (2)
and (4) of
IC3402 at "L"
state?
Check the its
line.
Check IC3402
and its
peripheral parts.
Check the pins
(65) and (66) of
IC2001 at "L"
state.
No picture
No picture
at all
No TV and
VIDEO 2
output
No TV output
No VIDEO 2
output
No
No
No
No
Yes
Yes
No
No
Yes
Yes
No
No
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
22
LC-22SV2E
TROUBLE SHOOTING TABLE
(Continued)
Check all the settings microprocessor's adjust process menu.
Is input at pin
(74) of IC801
normal?
Check the AV1
line (SCART
INPUT) and
their peripheral
parts.
Check the
SY-line, SC-line
and their
peripheral parts.
Is input at pins
(71) and (72) of
IC801 normal?
Is input at pin
(70) of IC801
normal?
Check the
V2VO line and
their
peripheral parts.
Is input at pins
(96)~(107),
(110)~(121)
and (132)~(143)
of IC4101
normal?
Is output at pins
(57)~(60) of
IC1601
normal?
Check IC4101
and its
peripheral parts.
Check the its
line. (V2V0)
Check the its
line.
Is output at pin
(21) of IC1601
normal?
Check IC1601
and its
peripheral parts.
No picture
No VIDEO 1
output
No S-VIDEO
(VIDEO 1)
output
No line
output
No TELETEXT
output
No
No
No
No
No
No
Yes
Yes
Yes
23
LC-22SV2E
TROUBLE SHOOTING TABLE
(Continued)
Check all the settings microprocessor's adjust process menu.
Is source GND
normal?
Is CSCOM
waveform
normal?
Check FB4901,
FB4902 and its
peripheral parts.
Check IC4702,
IC4711, Q4701
and their
peripheral parts.
Check FB4562
and its
peripheral parts.
Is gate GND
normal?
Is gate clock
(GCK) normal?
Check FL4572,
R4582 and gate
aray peripheral
parts.
Check IC4568
and its
peripheral parts.
Is VEE-6V being
outputted?
Is VGH+34V
being
outputted?
Check IC4565
and its
peripheral parts.
Is GSP
waveform
normal?
Check R4578
and its
peripheral parts.
Is VSH+3.3V
being
outputted?
Is source clock
normal?
Check IC4713
and its
peripheral parts.
Check R4563,
IC4561 and
their peripheral
parts.
Check IC4907
and gate aray
peripheral parts.
Is output of LBR
normal?
No picture
Becomes
dark
No
Time passes,
becomes
dark
Yes
No
No
Yes
No
Yes
No
Becomes
white.
Yes
Yes
No
No
No
Vertical line
output
Yes
No
No
24
LC-22SV2E
Check all the settings microprocessor's adjust process menu.
Is output of
R00~R07,
RE0~RE7
normal?
Is output of
G00~G07,
GE0~GE7
normal?
Is output of
B00~B07,
BE0~BE7
normal?
Check
FL4561~FL4564,
R4671~R4674
and their
peripheral parts.
Check
R4675~R4678,
FL4565~FL4568
and their
peripheral parts.
Check
R4679~R4682,
FL4569,
FL4510~FL4512
and their
peripheral parts.
Check IC4569,
IC4570 and
their peripheral
parts.
Is VLS +13V
being
outputted?
Is in/output of
SPIO and
SPOI normal?
Check R4571,
R4572, IC4561
and their
peripheral parts.
Is output VL0,
VL64, VL96,
VL128, VL160,
VL192, VL224,
VL256,
VH0, VH64,
VH96, VH128,
VH160, VH192,
VH224 and
VH256 normal?
Check
IC4703~IC4710
and their
peripheral parts.
No picture
Yes
Yes
No
No
Colour is
unusual
No
Picture
image is
gloomy
No
No picture
image
inversion
No
Gradation
defect
TROUBLE SHOOTING TABLE
(Continued)
Click on the first or last page to see other LC-22SV2E (serv.man2) service manuals if exist.