LC-15L1E (serv.man8). (8) Troubleshooting table - Sharp TV Service Manual (repair manual). Page 8

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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 
→ 
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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