Samsung SCX 6322DN - B/W Laser - All-in-One Service Manual page 101

Troubleshooting
No Power (LCD NO display LED Off)
Plug in the
power cord?
YES
The power
voltage supplying is
the same as
rating?
YES
The fan
revolves when
powered on?
YES
LEDs blink
once when
powered on?
YES
Shortage on
the OPE panel
board?
YES
Repair/replace the
board
Service Manual
6-24
NO
NO
NO
NO
The connection
NO
error between
controller board
and panel board
or malfunction
of boards.
-> Replace the
boards
Check the voltage first and plug
the power cord
Supply the power as the rating
Connections
NO Re-connect firmly
on board are OK?
and re-test
YES
NO
Fuse of SMPS
Replace the fuse
if open?
YES
Shortage
between 5V and
NO
GND, or between
24V and
GND?
YES
Detect failure due to the
Remove the shortage
board which detects side
or replace the board
cover open or switch error
-> Replace the board or switch
NO
Put in the
Toner cartridge
cartridge
is in the set?
YES
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