Ricoh FT3020 Field Service Manual page 143

July 1, '85
7C. Service Call Conditions
INDICATOR
U1
(Close Door)
U2
(Set Key Counter)
U3
Add Silicone
Oil and/or
Replace Toner
Collection Bottle
7 - 1 4
POSSIBLE CAUSE
Main Board Failure
Harness or Connector (24VDC) Failure
Thermofuse Failure
Key Counter Failure
Main Board Failure
Harness or Connector Failure
Oil End Sensor Failure
Toner Overflow Sensor Failure
Main Board Failure
CHECK POINT
24V is applied to CN103-1A
24V is not applied to CN103-1A
24V is not applied to CN82-6
While Key Counter is set, CN79-1,
0V is applied to CN103-10B
0V is not applied to CN103-10B
CH103-8B is 0V when the oil end
sensor is soaked in oil.
CH103-8B is 0V when the toner
overflow sensor is out of toner.
CH103-8B is 5V when the oil end
sensor is soaked in oil and the
toner overflow sensor is out of
toner.