Sharp LC-15L1US, Service Manual

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LC-15L1U-S
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 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-L1109.
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 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
→
Color bar
AUDIO
→
1KHz SIN wave