Marantz AV7701, Руководство по обслуживанию

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91
TROUBLE SHOOTING
1. POWER
1.1. Power not turn on
YES YES
NO
Power not turn on.
Is the fuse blown?
Is a DC 5V voltage being
supplied from the SMPS B'D
(BN903) to the HDMI B'D?
Refer to 1.2.Fuse is blown .
Is a DC 5V voltage output
when the cord supplying the
power from the SMPS B'D
to the HDMI B'D (CN903) is
unplugged?
Check µ-com periphery
circuitry of HDMI B'D and
replace any defective parts.
Check circuitry and parts from
CN903 on the HDMI B'D to the
µ-com power supply for damage
and shortcircuits, and replace
any defective parts.
To troubleshooting
6. SMPS .
(Refer to 110
page.)
YES
NO NO
Check for leaks or short
circuits in the primary side
parts, and replace any
defective parts.
Fuse is blown
Check for short circuits in the
rectifier diodes and circuitry of
the secondary side rectifying
circuits, and replace any
defective parts.
After repairing, also replace the fuse.
Check for short circuits in
the power stabilizer unit's
regulator output terminal and
the ground, and replace any
defective parts.
1.2. Fuse is blown