Troubleshooting - Sharp LC-20AV7U Service Manual

Table of Contents for the Troubleshooting Flow Charts
Flow
Chart
No.
1 The power cannot be turned on.
2 The fuse blows out.
3 When the output voltage fluctuates.
4 When buzz sound can be heard in the vicinity of power circuit.
5 +35V is not output.
6 VT+33V is not output.
7 INV+22V is not output.
8 DTV-ON+3.3V is not output.
9 DTV-ON+2.5V is not output.
10 DTV-ON+5V is not output.
11 AL+3.3V(D) is not output.
12 PANEL+3.3V is not output.
13 AL+1.2V(D) is not output.
14 AL+3.3V(A) is not output.
15 P-ON+5V(1) is not output.
16 +12V is not output.
17 P-ON+9V is not output.
18 DTV-ON+1.8V is not output.
19 PANEL-6V is not output.
20 The key operation is not functioning.
21 No operation is possible from the remote control unit.
22 Picture does not appear normally. (Tuner input (Analog) / Video input/S-Video input)
23 Picture does not appear normally. (Tuner input (Digital))
24 Picture does not appear normally. (Y / Pb / Pr input)
25 Audio is not outputted normally. (Tuner input)
26 Audio is not outputted normally. (Tuner input (Digital))
27 Audio is not outputted normally. (Audio input terminals)
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.

TROUBLESHOOTING

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