Panasonic FP-7818 Service Manual & Parts Manual page 131

E4-10: Exhaust fan motor (1) rotation
E4-11: Exhaust fan motor (2) rotation
E4-12: Exhaust fan motor (3) rotation
A lock signal is detected when the
fanmotor is rotating.
Is DC24V detected on CN106-3, 6 or
CN107-6 (on LVPS PCB)?
YES
Connector is shorted or broken.
Harness is defective.
Fan is defective.
A rotation signal is detected when the fan motor stops.
Is 0V CN106-3, 6 or CN107-6
(on LVPS PCB)?
YES
Fan is defective.
E5-01: Vp (+24V)
When the VCNT signal is "L", DC24V output is under approximately 18V or
when the VCNT signal is "H", DC24V outputs over approximately 18V/approximately.
Is DC24V detected on CN851-3 and 4
of the LVPS PCB?
YES
Is DC24V detected on CN205-1 and 2
of CPU PCB?
YES
Is DC24V detected on CN205-3 and 4
of the AC driver PCB?
YES
5-54
NO LVPS is defective.
NO LVPS is defective.
NO VCNT signal connector is
defective or broken.
Low voltage power supply PCB is defective.
NO Connector is shorted or broken.
Harness is defective.
NO The front cover open/close switch is defective.
The front cover is not closed correctly.
Connector is shorted or broken. Harness is
defective.