Oki B6100 Technical Manual page 101

Step
6
HEAT ROD SIGNAL ANALYSIS
Disconnect J282 from the HVPS Assy.
Disconnect P/J27 from the PWB HKB MCU.
Switch ON Main Power.
Does the Heat Rod glow?
7
Harness Assy Fuser-M (J271,J11, J27, J262) (PL6.1.12)
ANALYSIS
Disconnect the AC power plug from the back of the printer.
Disconnect P/J27, P/J271 and J282.
Is there continuity (0Ω) at the each harness?
8
THERMOSTAT AND FUSE ANALYSIS
Remove the Fuser Assembly from the printer.
Disassemble the Fuser Assy.
Is there continuity (0Ω) between the two ends of the Ther-
mostat?
Is there continuity (0Ω) between the two ends of the Plate
Fuse?
OKI B6100 Laser Printer - Base Engine Technical Manual
Version 1.0
Actions and Questions
6.4 Heat Rod Failure continued
Yes
Replace the
ROS Assy
(RRP8.1.5)
Go to step 8
Go to 6.3
Error Code
U4.
If your are
unable to
determine the
problem,
replace the
Fuser Assy,
PWBA HKB
PS, and the
PWBA HKB26
MCU.
Secondary FIPs
No
Replace the
PWB HKB
MCU
(RRP10.1.7)
Replace the
Harness Assy
Fuser-M
(J271, J11,
J27, J262)
Replace the
Fuser Assy
(RRP6.1.3)
6-9