Fusing Temperaturetoo Low; Pulse Generator Abnormal - Ricoh FT4430 Service Manual

16 April '88
56 FUSING TEMPERATURE TOO LOW
- Possible Causes -
+ Fusing lamp blown.
+ Thermistor failure.
- Action -
SC 56 turns on if the hot roller temperature drops below 150"C after warmup
is complete.
Is the fusing lamp blown?
Y N
I I
Replace the thermistor.
Replace the fusing lamp,

61 PULSE GENERATOR ABNORMAL

- Possible Causes -
+ Main drive malfunction,
+ Pulse generator sensor failure.
- Action =
SC 61 lights if the main board does not receive a pulse at CN206- A9 for
longer than 1.8 seconds.
Is the main drive mechanism working properly.
Y N
I I
Check/repair all parts of the main drive IIWChWIiSm.
Repair or replace the pulse generator.
(MotoL timin9 bek etc.)