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No 33VT
YES
Is the VCC (33V) supplied to Q161
Emitor ?
YES
Is there about 0V at Q152 Collector ?
YES
Is there about 5V at R180 and 0.7V at
Q152 Base?
YES
Check Q152 and Replace
No 5.0VD
YES
Is there about 5.3V at the IC153 pin 1 ?
YES
Is there about 4V ~ 5V at the IC153
pin 4 ?
YES
Check the IC153 and Replace
NO
Check D126 on SMPS Board and Replace
NO
NO
Check the 'TIMER H' signal
from µ-COM
NO
Check 5.3VA on SMPS Board
NO
Check the 'PWR CTL H' signal from
µ-COM
3-6
Check Q161 and Replace
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Troubleshooting
