Smps - Marantz SR5009/U1B Service Manual

6. SMPS

DC 5V is not output.
Is IC4140 (TOP258MG) damaged?
NO
Has a fuse (F4140) broken?
NO
Are there any short circuits caused by
the soldering of the PCB?
NO
Are any parts damaged?
YES
Replace the IC4140 (TOP258MG) and
D4142 / D4143 / D4144 / D4145.
YES
Are there the damage in D4142 /
D4143 / D4144 / D4145 / IC4140?
YES
Repair the short circuited area(s) by the
soldering of the PCB.
YES
Check the damage of each part.
90
YES
Replace the damaged part(s).
YES
Replace the damaged part(s).