Smps - Marantz AV7701 Service Manual

6. SMPS

DC 5V is not output.
Is there damage in IC901
(TOP258MG)?
NO
Is the fuse (F9001) blown?
NO
Is there solder short circuit in the PWB
board?
NO
Is there a damaged part?
YES
Replace the IC901(TOP258MG) and
D9001/D9002/D9003/D9004.
YES
Is there the damage in D9001/D9002/
D9003/D9004/C9004?
YES
The solder short part of the PWB board
is repaired.
YES
Check the damage of each part.
110
YES
Replace the parts of damage.
YES
Replace the parts of damage.