Sharp AQUOS LC-15L1E, Руководство по обслуживанию

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LC-15L1E
»
TV receiver (RX) side fault-finding flowchart with no link
Not serviceable
IC1704 failure
OK OK OK
A. No display
YES
YES YES
YES
NO NO
NO
NO
NO
YES
NO
NO NO NO NO NO
YES YES YES YES YES YES
OK
No link
Check the microprocessor operation using terminal software.
OK
NG
OK
1
Is 9V available at pins
(1)-(3) of CN2?
B. No second time Version display
C. MPEG setup OK is not displayed.
D. No display after APOLL2 startup
E. All displays are normal.
1
Using a spectrum analyzer or the like, check that output signal has RF waveform.
2
Check that the cable connecting CN200 and UNT1700 has no interference or damage.
3
Replacement of UNT1700 did not help recover normal operation?.
4
Check pins (40)-(43) of IC704 and the peripheries.
5
Check CN200 and the peripheries.
2
Is 3.3V available at each of the following pins of IC1701? (1), (8), (31), (37), (44), (54), (67), (73), (80), (90), (103), (109), (116), (126), (133) and (139)
1
Check IC1701 and the periphery.
3
Go to the step E.
2
.
1
Is 1.5V available at
both ends of L6000, and +3.3V at both ends of L6001?
3
Is signal waveform normal at pin (44) of IC1100?
1
Check IC1100 and the periphery.
4
Check the following connections. Between pin (23) of IC1100 and pin (21) of IC704 Between pin (24) of IC1100 and pin (23) of IC704
2
Is output normal at the following pins of IC1100? (1), (11), (20), (28) and (30): +3.3V
2
Is 3.3V output available at pin (4) of IC906?
3
Is output signal waveform normal at pin (13) of IC704?
4
Is 3.3V output available at pin (4) of IC706?
6
Check IC704, Q705 and their peripheries.
7
Check IC902 and the periphery.
8
Is 1.5V available at TP902?
9
Is 3.3V available at TP900?
0
Is 5.0V output available at pin (4) of IC907?
q
Check IC1500 periphery.
Check for connector damage or cable disconnection. Check IC906 periphery.
Go to the step A.
9
.
Go to the step A.
8
.
Check L6000 and L6001.
Go to the step A.
9
.
Replace the cable.
Check FL701 periphery. Check IC706 periphery. Check Q904 periphery. Check Q902 periphery. Check IC1501 and Q903 peripheries. Go to the step B.
1
.