Dell 2355DN Service Manual - Page 94

Poor Fusing Grade, of U36 CPU on Main

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Poor Fusing Grade Alignment and Troubleshooting After printing NO completed, any error related fuser? YES The machine placed under the NO severe low tempera ture for a long time? YES While printing, the voltage of pin 60 NO of U36 (CPU) on Main PBA is 2.1V - 2.6V? YES Thermistor's NO contact is OK? YES Both ends NO of thermostat open? YES Place the machine at normal temperature and re-test Replace thermostat and re-test Re-assemble thermistor Open the top cover. When black NO printing, is the fuser NIP width is 3.03.5mm? Check if the hardness of P/R, and spring force is OK? (hardness: 24 degree, spring's force: 3 Kg) YES Replace the control component on Main PBA Check any contact problem in thermistor and repair The paper used is too thick or contains too much cotton in it -> Re-test with the recommended paper 4-54 Service Manual

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Alignment and Troubleshooting
4-54
Service Manual
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 Main
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