Marantz CD5005, Руководство по обслуживанию

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2.2. FLD Control Waveform
2.3. Remote control is not accepted
VDD
DIS_CD
DIS_SCL(CP)
DIS_SO(DA)
W1
W2
W3
W4
YES
YES
Is the power voltage (FST+3.3V)
of the CUP12663Z-4 FRONT PCB
remote control sensor (U4001)
normal?
• FCC300 1pin,2pin (ST+3.3V)
When a remote control button
is pressed, is a remote control
waveform (pulse waveform) output
from the CUP12663Z-4 FRONT
PCB remote control sensor
(U4001)?
• FCC300 17pin (REMOTE)
Check the condition and soldering
of the remote control optical receiver
circuit parts, and replace any faulty
parts.
Remote control is not accepted.
Check the U3904 input voltage of the
CUP12663Z-1 POWER PCB, and the other
circuits and soldering that handle the output
load.
If there are no abnormalities, replace the
U3904.
Check the condition and soldering of the
remote control sensor (U4001) pins etc. of the
CUP12663Z-4 FRONT PCB.
Replace the remote control sensor if any
abnormalities are found.
NO
NO
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