Samsung SF-530 Service Manual page 61

Troubleshooting
Poor Fusing Grade
NO
After printing
completed, any error
related fuser?
YES
Both ends
NO
of thermostat
open?
YES
Replace thermostat
and re-test
Replace the contol
component on engine
board
Check any contact
problem in thermistor
and repair
4-28
The machine
NO
placed under the
severe low tempera
ture for a long
time?
YES
Place the machine
at normal
temperature and
re-test
While printing,
NO
the voltage of pin 208
of U5 (CPU) on Main
board is 2.0V
~2.3V?
YES
Open the top
cover. When black NO
printing, is the fuser NIP
width is 1.2~
3.0mm?
YES
The paper used is too
thick or contains too
much cotton in it
-> Re-test with the
recommended paper
NO
Thermistor's
contact is OK?
YES
Re-assemble
thermistor
Check if the hardness of
P/R, and spring force is OK?
(spring's force: 2.5 Kg)
Samsung Electronics