XR-D400SL
1-10
CN991 section
(Note) Connection points of the 4 wires.
Do not disconnect any
other connections.
YES
YES
YES
YES
YES
NO
NO
NO
First remove the 4 wires connected to the Power Supply unit (QAL0244-002) (see photo below) to do a check
of the stand-alone mode.
(1) Press the POWER button to ON, and check the voltages at the leftmost wire (red, DC +5 V) and the
rightmost wire (yellow, DC +12 V).
Then connect the wires and check the voltages as described below.
(1) Check the continuity between the GND line and leftmost wire (red, DC +5 V) and the rightmost wire (yellow,
+12 V) to ensure that there is no short-circuiting.
(2) Press the POWER button to ON and check the voltages at the leftmost wire (red, DC +5 V) and the
rightmost wire (yellow, DC +12 V).
If the CD voltage drops abnormally or the protection device (fuse, etc.) is released when the wires are
connected (i.e. load is applied), there may be short-circuiting on the load side or in the connection path.
Power supply operation
OPEN/CLOSE operation
Press the
OPEN/CLOSE button.
OPEN/CLOSE
operation is OK.
Is DC power
supply normal?
Does the tray
open or close?
Can other buttons
be used?
Can the tray be
opened/closed by the
OPEN/CLOSE button in the
stand-alone mode.
Check connections of
CN602, CN603 and
drives.
Check the Front and
Control boards.
Check connections of
CN111 and CN001.
Check the Front and
Control boards.
Check the connections
of CN602, CN603 and
the drives.
Go to the
"Power Supply Operation".
In the stand-alone mode the
OPEN/CLOSE button can be
pressed by removing the
front panel.
CD-ROM
drive
CD-R/RW
drive
