Ricoh FT2050 Field Service Manual page 176

February 1, 1986
Definition
<E5-52 >
Lights the temperature detected by the ther-
1. if
mister does not reach 125°C within 75 seconds
after the main switch turns on.
<E5-53 >
1. Lights if the temperature detected by the ther-
mistor is higher than 270°C.
<E5-55 >
1. Lights if the temperature detected by the ther-
mistor does not reach 2°C within 5 seconds after
the main switch turns on.
Possible causes
<E5-52 >
Thermofuse open
1.
2. Fusing lamp burned out
3. Fusing power supply board defective
4. Main board defective
<E5-53 >
1. Thermistor short
2. Main board defective
<E5-55 >
1. Thermistor open
2. Fusing triac failure
3. Main board defective
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