GC150AT/ATA
9. No power on
9.1 No power on (I)
Check output voltage +5V,
+15V is right or not.
OKIt is not power board
NGproblem.
Check power switch is turn on
or not.
NGTurn switch on.
OK
Check power cord ( P801), Signal cable
(P302),P802, P803, CN102, CN103
is connected right or not.
NGConnect it right.
OK
Check C805 is about DC
140V-330V or not.
NGCheck F801, D801, P801
OKand repair them.
Check C807 is over
10V or not.
NGCheck R805, R803, I801
OK and repair them.
Check pin 6 of I801 have
same pulse or not.
Check peripheral components
NG
OK of I801 and repair them.
Check pin 1 of T802 have
same pulse or not.
Check Q803, R813, R814, D806
NG
OK, R812 and repair them.
Check peak voltage of R811 triangle
pulse is up to 1 volt or not.
NGCheck D804, R807 and
OKrepair them.
Check D809, D810, C816, C821, T802
have same short circuit, or the output
+5V, +15V is over load.
OK
Repair them.
NG
Check feedback circuit around I802,
I803 and the other components
and repair them.
Trouble ShootingPage 11 |