Read Sharp LC-15L1E (serv.man8) Service Manual online
26
LC-15L1E
YES
NO
YES
YES
YES
YES
NO
YES
YES
NO
NO
NO
NO
YES
NO
NO
NO
YES
NO
NO
YES
IC1100 failure
NO
NO
YES
No sound
YES
YES
IC704 failure
IC1500 failure
NO
YES
NO
YES
YES
YES
No picture
NO
NO
NO
YES
Is DC voltage normal at each of the
following pins?
Pin (8) of IC1501
→
+8.0V
Pins (1), (2), (14) and (24) of
IC1500
→
+3.3V
Is output signal waveform at pins
(19) and (20) of IC1500 similar to
that of the input signal supplied to
Smart Link transmitter?
Pin (19)
→
L, Pin (20)
→
R
Are pins (7) and (8) of IC1500 at HI
(+3.3V) level?
Is control signal normal at each of
pins (9), (10) and (11) of IC1500?
Is signal waveform normal at pin
(15) of IC1500?
Check each IC
and the
peripheries of
L1500 and
L1501.
Check IC1501
periphery.
Check for
connector
damage or cable
disconnection.
Is output signal waveform available at
pins (1), (3) and (5) of CN1?
Is output signal waveform available at
pins (26), (27) and (31) of IC1100?
Is normal +5.0V available at pin (5) of
IC1300 and pin (8) of IC1302?
Are the waveforms normal at pins (2), (5)
and (6) of IC1302?
Does TP_PWM show normal waveform?
IC1501 failure
Check the
peripheries of
L1101-L1103.
IC1000 failure
(Not serviceable)
Check for connector
damage or cable
disconnection.
IC704 failure
Q701 failure
IC1000 failure
(Not serviceable)
Check the periphery
of each IC.
Check the
peripheries of
IC1302 and XC1301.
Are the waveforms of clock signal
at pin (44) and data signal at pin
(41) of IC1100 normal?
Remote controller does not work.
* Pictures and sounds are
produced.
Perform the following checks by
actually operating the remote
controller for a video source.
Is there an output of data signal
waveform at pin (12) of CN1?
Is there an output of data signal
waveform at pin (19) of IC704?
Is normal +8.0V
available at pins
(3) and (5) of
IC1501?
Check for
connector
damage or
cable
Q1501 and
Q1502 failure
IC704 failure
Q1500 failure
Is output signal
waveform at pins (1)
and (7) of IC1501
similar to the waveform
mentioned on the left?
Pin (1)
→
R, Pin (7)
→
L
Is output signal
mentioned above
available at pins (7) and
(9) of CN2?
Pin (7)
→
R, Pin (9)
→
L
Are base terminals of
Q1501 and Q1502 at
LOW (0V) level?
Is base terminal of
Q1500 at HI (+3.3V)
level?
IC1000 failure
(Not serviceable)
IC1000 failure
(Not serviceable)
»
TV receiver side fault-finding flowchart with normal link
~
Perform the following checks while maintaining the link and feeding the signals to Wireless Center.
Reference waveform: VIDEO
Reference waveform: VIDEO
→
Colour bar
AUDIO
→
1KHz SIN wave
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