Specifications

Troubleshooting IIf/IIg Diagnostic/ - 1
IIf/IIg Diagnostic
Set the rotary switch on the back of the printer to 4 and connect
the LaserWriter II Test Connector to the DB-25 serial port (or
simply jumper pins 4 and 22). Switch on the printer. Under
normal conditions, LEDs should flash during startup, and then fix
on the “diagnostic executing” configuration for about 2 minutes.
If no error is found, all LEDs flash and a page prints. If the LEDs
indicate an error, go to the appropriate topic in Flowcharts.
After running this diagnostic, switch off the printer, remove the
Test Connector, and reset the rotary switch to its original setting.
(No Error Found)
(Diagnostic Executing)
Fuser Assembly Error
Laser/Scanner Error
I/O Controller Board Error
Replace ROM #1
Replace ROM #2
Replace SIMM #2
Replace SIMM #3
Replace SIMM #4
Replace SIMM #5
Replace SIMM #6
Replace ROM #3
Replace ROM #4
Replace SIMM #1
Replace SIMM #6
Replace SIMM #7
Replace SIMM #8