Oki B6500 Series, Service Manual

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Chapter 1 Troubleshooting
FIP1.42 Electrical Noise
Step Check Yes No
Possible causes:
HVPS/MCU (PL12.1.19)
GUIDE ASSY CRU R (PL8.1.25)
FUSER ASSY (PL8.1.20)
EP CARTRIDGE
HARNESS ASSY ANT (PL8.1.24)
HARNESS ASSY AC100V/200V (PL12.1.8)
HARNESS ASSY LVPS (PL12.1.1)
Option 550 Paper Feeder PWBA FEEDER 550
(PL20.1.34)
PWBA DUPLEX (PL21.1.32)
1
Checking a foreign noise
Are there any other electrical appliances within 3 m of
the printer, such as generators, radios and appliances
with motors?
Either turn off the other electrical appliances, or re-
locate the printer at least 6 m from other appliances.
Does the electrical noise problem still occur?
Go to step 2. End of work
2
Checking AC ground
Is AC power supply outlet wired and grounded appro-
priately?
Go to step 3.
Request the client
to fix AC power
supply outlet.
3
Checking HARNESS ASSY AC100V/200V
Is the cable connected to HARNESS ASSY AC100V/
200V appropriately grounded?
Go to step 4.
Install the ground
screw appropri-
ately.
4
Checking after replacing EP CARTRIDGE
Replace EP CARTRIDGE.
Does the electrical noise problem still occur, after
replacement?
Go to step 5. End of work
5
Checking GUIDE ASSY CRU R (1)
Does the Plate Earth of GUIDE ASSY CRU R contact
terminals on HVPS/MCU appropriately?
Go to step 6.
Replace GUIDE
ASSY CRU R.
(RRP8.13)
6
Checking GUIDE ASSY CRU R (2)
Remove EP CARTRIDGE.
Remove GUIDE ASSY CRU R. (RRP8.13)
Is the Plate Earth of GUIDE ASSY CRU R normal and
not damaged or soiled, or there is no disturbing object?
Go to step 7.
Clean the plate or
replace GUIDE
ASSY CRU R.
(RRP8.13)
7
Checking HARNESS ASSY ANT for continuity
Disconnect P/J15 from HVPS/MCU.
Is there continuity between J15 and J150?
Go to step 8.
Replace HAR-
NESS ASSY ANT.