Smps - Denon AVR-1913 Service Manual

6. SMPS

DC 5V is not output.
Is there damage in IC4140
(TOP258MG)?
NO
Is the fuse (F4140) blown?
NO
Is there solder short circuit in the PCB
board?
NO
Is there a damaged part?
YES
Replace the IC4140 (TOP258MG) and
D4142/D4143/D4144/D4145.
YES
Is there the damage in D4142/D4143/
D4144/D4145/IC4140?
YES
Repair the solder short part of the PCB
board.
YES
Check the damage of each part.
99
YES
Replace the damaged parts.
YES
Replace the damaged parts.