S
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Model No.:
-52 -
9-2. M
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Power Units Proble
m
Sol
v
ing
In stand-by condition,
Check pin 10of J5,
Whether got 5V
˛
Whether main board testing TP8point got 3.3V?
Normal booting
Whether power suppply and main
board is shortcircuit?
Whether power chip LDO(U3)
works?
power chip LDO(U6) works?
diode (D29) works?
power chip (U1) works?
After power on, check
whether pin 3/4 of J5got 5v,
pin 1 of J5 got 12v, testing
point TP7 got 2.5v, testing
point TP3 got 3.3v, testing
point TP5 got 1.8v, testing
point TP1 got 1.32v?
Y
N
OK
Check U9 power
network
N
Y
Y
N
Check external
power suppply
Содержание LE55B1381a
Страница 13: ...3 4 LED Panel 12 Service Manual Model No V546H1 LE5 ...
Страница 17: ...4 Disassemble and assemble Service Manual Model No 15 Front Back 4 1 Remove the10 screws as below picture ...
Страница 22: ...Service Manual Model No 20 4 11 ...
Страница 53: ...9 Trouble shooting 9 1 Simple check Service Manual Model No 51 ...