Trouble Shooting; Power - Marantz SR5008 Service Manual

TROUBLE SHOOTING

1. POWER

1.1. Power not turn on
Power not turn on.
When the power turned on,
does the FLD on the front
panel light?
YES
About 10 seconds later,
does the sound where relay
enters?
NO
Is the fuse blown?
NO
Check voltage of N3405 (1-
5PIN) of HDMI B'D while the
ON/STANDBY indicator is
flashingred.
0.6V or -0.6V
Pull out connector (CP4001)
of SPK BD, and check "3.5.
Errors checking mode".
(Refer to 47 page.)
1.2. Fuse is blown
Check for leaks or short
circuits in the primary side
parts, and replace any
defective parts.
NO
Is the fuse blown?
NO
Is a DC 5V voltage being
supplied from the SMPS B'D
(CN4141) to the HDMI B'D?
YES
Check µ-com peripheral
circuitry of HDMI B'D and
replace any defective parts.
YES
YES
Refer to 1.2. Fuse is blown.
Check circuitry and parts from N3405 on
0V
the HDMI B'D to the µ-com for damage
and shortcircuits, and replace any
defective parts.
Fuse is blown
Check for short circuits in the
rectifierdiodesandcircuitryof
the secondary side rectifying
circuits, and replace any
defective parts.
After repairing, also replace the fuse.
www.audiodna.sk
YES
Refer to 1.2.Fuse is blown.
Is a DC 5V voltage output
NO
when the cord supplying the
power from the SMPS B'D
to the HDMI B'D (N3601) is
unplugged?
YES
Check circuitry and parts from
N3601 on the HDMI B'D to the
µ-com power supply for damage
and shortcircuits, and replace
any defective parts.
Are there any incomplete
connections in the connectors
connecting between the
various circuit boards?
YES
Connect the connectors properly.
Check for short circuits in
the power stabilizer unit's
regulator output terminal and
the ground, and replace any
defective parts.
81
To troubleshooting
NO 6. SMPS.
(Refer to 94
page.)
Check "3.5. Errors
NO
checking mode".
(Refer to 47
page.)