Background - Samsung ML-920 Service Manual

Troubleshooting

Background

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
- Adjust voltage or
replace HVPS
- Repair or replace
after
checking the
terminals' contacts
4-23
Recommended
paper used?
YES
Transfer,
NO
charge and developing
voltage are OK?
YES
Operating/
storage atmosphere is
too high temperature
/humidity?
YES
Solve the problem under
the recommended condition
(10-32 degree Centigrade)
Check Terminals or contacts and 'Guide-Deve Spring'
are misplaced
-> Repair or replace transfer roller etc.
Check if the LED of PTL in front of the transfer roller
is on when it presses the top cover switch on purpose
-> If not, replace PTL
NO
Print 20 to 30 pages using
the recommended paper
YES
Same problem
occurs?
Dirt or
NO
dust around the
charge roller?
YES
Clean the charge roller
or replace step-up device
/terminal after check
NO
END
NO
Replace the
toner cartridge
NO
Work OK?
YES
Internal blade or
supplying part of the
developer is defective
-> Replace the toner
cartridge
Samsung Electronics