Power Supply - Sony D98 chassis Operation Manual

Check Q505,506,901,
902 and video board
Check
IC701,703,704,604,601,504
R617
Replace Q602,
Check D603,615
R609,615,IC601
Replace parts,
verify voltage
Check A board by
disconnecting CN602
If OK, replace SRT

POWER SUPPLY

1
Check F601
and D601
Yes
Does power
supply make
chirping noise?
No
Yes
Does Power supply
try to start?
No
No
Q602 OK?
Yes
No
Are D603,615
R609,615
IC601 OK?
Yes
Replace IC605,IC805
Check secondary diodes,
FPRD resistors
No
Operating?
Yes
Verify voltages and
adjust monitor
Done
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