Read Sharp LC-15B5E (serv.man9) Service Manual online
22
LC-15B5E
TROUBLE SHOOTING TABLE
(Continued)
No picture (1/3)
Check all the settings microprocessor's adjust process menu.
Is in/output of
IC8801 and
IC8501 normal?
Is in/output of
IC1201 normal?
Check IC8801,
IC8501 and their
peripheral parts.
Check IC1201
and its
peripheral parts.
Check LCD
panel voltages
and waveform.
Yes
Yes
No
No
No picture
at all
Is voltages at
pins (7), (9) and
(15) 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
(47) of IC3401
normal?
Is output at pin
(40) of IC3401
normal?
Yes
Yes
No
No
No
No
No
Yes
No TV output
Is output at pin
(73) of IC8801
normal?
Yes
Check the its
line.
Check the its
line.
Check IC3401
and its
peripheral parts.
Is input at pin
(8) of IC3401
normal?
Check V2_V
line and its
peripheral parts.
No
No VIDEO 2
output
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