Marantz CD5005, Руководство по обслуживанию

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TROUBLE SHOOTING
1. POWER
1.1. Power not turn on
NO
NO
NO
NO
NO
YES
YES
YES
NO
Is the CUP12663Z-1 POWER PCB
connector disconnected?
• CN3901, CN3902, CN901, CN902
When the power turned on,
does the ON/STANDBY
indicator on the front panel
flashing red?
Is the
CUP12662Z_A MAIN PCB
connector disconnected?
•
CN2801
Is the CUP12663Z-3 STANDBY PCB
connector disconnected?
• CN4101
Is the STANDBY TRANS winding of
the
CUP12663Z-1 POWER PCB
broken?
• T3901
Is the CUP12663Z-1 POWER PCB
ST+3.3V output voltage normal?
• BN2801 5pin (ST+3.3V)
Has the power relay of the
CUP12663Z-1 POWER PCB switched?
• S3901
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?
• BN2801 11pin ON signal (+3.3V)
or
• D3934 Anode Low signal (0V)
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 ( IC302
85 pin) from the UCOM of the
CUP12662Z_A MAIN PCB , and
the soldering of the surrounding
circuits.
Replace the UCOM if any
abnormalities are found.
• IC302
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
NO
YES
YES
YES
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