LiteOn B17AAU, Руководство по обслуживанию

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Trouble Shooting Page 15
B17AAU / B17ANU / B17AAY
12. Power Board
Check output v5V, +12V is
right or not.
N o
Yes
It is not power board problem
Check power switch is turn on or not.
Yes
N o
Turn switch on.
Check power cord (P801), Signal cable (P302),
P802, P803, CN102, CN103 is connected right or not.
Yes
N o
Connect it right
Check C805 is about DC140V~330V
or not.
Yes
N o
Check F801, D801, P801 and repair them.
Check C807 is over 10V or not.
Yes
N o
Check R805, R803, I801 and repair them.
Check pin 6 of I801 have same
pulse or not.
Yes
N o
Check peripheral components of I801 and repair
them.
Check pin 1 of T802 have same
pulse or not.
Yes
N o
Check Q803, R813, R814, D806, R812 and
repair them.
Check peak voltage of R811 triangle
pulse is up to 1 volt or not.
Yes
N o
Check D804, R807 and repair them.
Check D809, D810, C816, C821, T802 have same
short circuit, or the 5V, +15V is over load.
Yes
N o
Repair them
Check feedback circuit around I802, I803 and the
other components and repair them.