Read Sharp LC-15L1E (serv.man8) Service Manual online
25
LC-15L1E
»
Wireless Center side fault-finding flowchart with normal link
~
Perform the following checks while maintaining the link and feeding AV input signals to Wireless Center.
Reference waveform: VIDEO
Reference waveform: VIDEO
→
Colour bar
AUDIO
→
1KHz SIN wave
YES
NO
NO
NO
YES
NO
NO
NO
NO
NO
NO
IC5704 failure
YES
No sound
N
o picture
YES
YES
YES
YES
YES
YES
Is audio input signal supplied correctly
to pins (27) and (29) of CN5001?
Pin (27)
→
L, Pin (29)
→
R
Is DC voltage normal at each of the
following pins?
Pin (8) of IC6501
→
+5.0V
Pins (1), (2), (14) and (24) of
IC6500
→
+3.3V
Is output signal waveform at pins (3)
and (6) of IC6500 similar to
the above input signal waveform?
Pin (3)
→
R, Pin (6)
→
L
Is pin (7) of IC6500 at HI (+3.3V)
level?
Is signal waveform normal at pin (12)
of IC6500?
Is control signal normal at each of pins
(9), (10) and (11) of IC6500?
Check for connector
damage or cable
disconnection.
Is video input signal supplied correctly to
each of the following pins?
Check for connector
damage or cable
disconnection.
Check for connector
damage or cable
disconnection.
Check the continuity
between pin (24) of
IC5704 and pin (24)
of CN5001.
Remote controller does not work.
* Pictures and sounds are produced.
Is there an output of data signal
waveform at pin (24) of CN5001?
Is there an output of data signal
waveform at pin (24) of IC5704?
Perform the following checks by
actually operating the remote
controller for a video source.
IC6000 failure
(Not serviceable)
Check each IC and
the peripheries of
L6500 and L6501.
Check IC6501
periphery.
IC5704 failure
IC6500 failure
IC6000 failure
(Not serviceable)
IC6000 failure
(Not serviceable)
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