42
TROUBLESHOOTING GUIDE
Reset or Power ON.
•
Check the power short.
•
Check PC power cable, power
supply and fuse.
Repair PC power supply.
NO
Replace IC103 (2.7V Regulator).
NO
YES
OK
Between 36 pin (VREF) of
IC301 and 39 pin (VC)
of IC701.
Replace IC301
OK
YES
Are the pin 44
and 41 of CN 201 +5V and +12V
respectively after the power
cable connecting?
Is the pin 3 of
IC103 2.7V?
Check the VREF line.
NO
Is the pin 36 of
IC301 1.35V?
Replace IC101 (3.3V Regulator).
NO
YES
YES
OK
Is the pin 3 of
IC101 3.3V?
Replace X201, and X701 when
the power supply of IC201 and
IC701 is OK.
NO
YES
Do the X201, and
X701 oscillating?
Replace IC203 when the IC101
(3.3V Regulator & Reset IC) is
non-ok.
NO
YES
Does the pin 63
of IC203 change 0V to 5V at
the power supply initial
input mode?
Refer to “Tray open / close
doesn’t work.”
NO
YES
Does the tray open or
close?
(Check it after connecting the power cable only no interface cable)
A
