Alignment & Troubleshooting
Service Manual
4-82
Samsung Electronics
Poor Fusing Grade
After printing
completed, any error
related fuser?
Both ends
of thermostat
open?
Replace thermostat
and re-test
Replace the control
component on Main
PBA
Check any contact
problem in thermistor
and repair
The machine
placed under the
severe low tempera
ture for a long
time?
Place the machine
at normal
temperature and
re-test
While printing,
the voltage of pin 60
of U36 (CPU) on M
ain
PBA is
2.1V
- 2.6V?
Thermistor's
contact is OK?
Open the top
cover. When black
printing, is the fuser
NIP
width is 3.0-
3.5mm?
The paper used is too
thick or contains too
much cotton in it
-> Re-test with the
recommended paper
Check if the hardness of
P/R,
and spring force is OK?
(hardness: 24 degree,
spring's force: 3 Kg)
Re-assemble
thermistor
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
