Alignment & Troubleshooting
Service Manual
4-85
Samsung Electronics
No Power (LCD NO display LED Off)
Plug in the
power cord?
The power
voltage supplying is
the same as
rating?
The fan
revolves when
powered on?
LEDs blink
once when
powered on?
Shortage on
the
OPE panel
board?
Repair/replace
the
board
Check the voltage first and plug
the power cord
Supply the power as the rating
Connections
on board are OK?
Re-connect firmly
and re-test
The connection
error between
controller board
and panel board
or malfunction
of boards.
-> Replace the
boards
Fuse of
SMPS
if open?
Shortage
between 5V and
GND,
or between
24V and
GND?
Replace the fuse
Toner cartridge
is in the set?
Detect failure due to the
board which detects side
cover open or switch error
-> Replace the board or switch
Put in the
cartridge
Remove the shortage
or replace the board
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
