Samsung ML-5000A Service Manual page 27

4-2-6 Ghost
NO
Replace PTL
assembly.
Check HVPS
contacts and
HVPS's self-
NO
output.
-> If failed,
repair/replace
HVPS.
Samsung Electronics
Is it regular
NO
interval of 94mm?
YES
PTL lamp
works OK?
YES
Transfer
voltage is set to
standard?
YES
Bias voltage NO
is OK? (-300V)
YES
NO
Operating/storage
temperature is too low or
not recommended
paper used?
YES
Use the machine with
recommended paper and
at normal condition.
Is it regular
NO
interval of 46mm?
YES
A specific part of the transfer
roller has ruined or its
resistance value is changed.
-> Replace transfer roller.
Transfer roller cannot force
regularly due to the gears
eccentricity of transfer roller.
-> Replace the defective
component.
Developing
NO
/suppying voltage
normal? (-300V/
-500V)
YES
Irregularity of NIP
between rollers in
developer.
-> Replace developer.
Adjust the Bias
voltage or replace
HVPS.
There may be a problem in toner
layer control in toner cartridge.
-> Replace the developer.
Troubleshooting
Is it regular
interval of 47mm?
(as transfer roller
interval)
YES
- Repair or replace HVPS .
- Check and repair or
replace the terminal
contacts.
4-7