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10. No power on
10.1 No power on (I)
Trouble Shooting
Check output voltage +5V,
+12V is right or not.
Yes
No
Check power switch is turn on
or not.
No
Yes
Check power cord ( P801), Signal cable
(P302),P802, P803
is connected right or not.
No
Yes
Check C805 is about DC
140V-330V or not.
No
Yes
Check C807 is over
10V or not.
No
Yes
Check pin 6 of I801 have
same pulse or not.
No
Yes
Check pin 3 of T802 have
same pulse or not.
No
Yes
Check peak voltage of R811 triangle
pulse is up to 1 volt or not.
No
Yes
Check D809, D810, C816, C821, T802
have same short circuit, or the output
+5V, +12V is over load.
Yes
No
Check feedback circuit around I802,
I803 and the other components
and repair them.
It is not power board
problem.
Turn switch on.
Connect it right.
Check F801, D801, P801
and repair them.
Check R805, R803, ZD802, Q801,
I801 and repair them.
Check peripheral components
of I801 and repair them.
(e.g. Q805, Q806)
Check Q803, R813, R814, D806
, R812 and repair them.
Check D804, R807 and
repair them.
Repair them.
NEC-FA150ATUA
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