Marantz CD6005 - Troubleshooting Guide; Power Issues

TROUBLE SHOOTING
1. POWER
1.1. Power not turn on
NO
NO
NO
NO
NO
YES
YES
YES
NO
NO
Is the CUP12552Z_A-3 POWER B'D
connector disconnected?
• N3901,N3902,N3903
When the power turned on,
does the ON/STANDBY
indicator on the front panel
ashing red?
Is the CUP12551 MAIN B'D connector
disconnected?
• N2801
Is the CUP12552Z_A-5 STANDBY
B'D connector disconnected?
• N4101
Is the STANDBY TRANS winding of
the CUP12552Z_A-3 POWER B'D
broken?
• T3901
Is the CUP12552Z_A-3 POWER B'D
ST+3.3V output voltage normal?
• B2801 5pin (ST+3.3V)
Has the power relay of the
CUP12552Z_A-3 POWER B'D
switched?
• S3901
Is the CUP12552Z_A-1 TRANS
B'D fuse wire broken?
• F3903,F3951,F3952
If the control signal (STBY_CNT)
of the power relay drive is normal,
replace the relay (S3901).
Power not turn on.
Insert any disconnected connectors.
Insert any disconnected connectors.
Insert any disconnected connectors.
Replace STANDBY TRANS (T3901).
Check U3904 input voltage.
Check Parts and Soldering and Other Circuits.
If abnormality is not found, replace U3904.
Is the control signal (STBY_CNT)
for the power relay drive normal?
• B2801 11pin ON signal (+3.3V)
or
• The D3934 anode Low signal (0V)
Is the Main Trans (T3951) primary
winding of the CUP12552Z_A-1
TRANS B'D broken?
Are any of the rectifying diodes
or circuits shorted in each of the
secondary side rectifying circuits?
Are the regulator output terminal
and GND, or circuit and GND of the
secondary power stabilization section
shorted?
Check the signal line (U2002
55pin) from the UCOM of the
CUP12551 MAIN B'D, and the
soldering of the surrounding
circuits.
Replace the UCOM if any
abnormalities are found.
• U2002
Replace the fuse. Also, if the
B3902 1-3pins or T3951 12-
2pins are open, replace the main
transformer (T3951).
Replace the fuse. Also, check
each of the rectifying diodes and
circuits of the rectifying circuits on
the secondary side for shorts, and
replace any faulty parts.
Replace the fuse. Also, check
each of the regulators and circuits
of the rectifying circuits on the
secondary side for shorts, and
replace any faulty parts.
YES
YES
YES
YES
NO
NO
YES
NO
YES
YES
YES
YES
NO
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