Ricoh SAVIN D0AP Service Manual page 476

SC No. Type
temperature at the end of the hot roller was 250°C or higher and triggered an
abnormally high-temperature detection flag.
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SC No. Type
SC555-00 A Fusing lamp (end) remains ON
After reaching reload temperature, the fusing lamp remained on for more than
13.1 sec. (the maximum DUTY time allowed after reloading).
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SC No. Type
SC557-00 C Zero cross frequency too high
Zero cross count processing is executed at 0.5 sec. intervals.
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The above processing is executed for 11 counts when the number of
low-frequency detections is 1 or more.
Frequency is the input power source is unstable, and there is noise on the
line.
D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1
Error Name/Error Condition/Major Cause/Solution
TRIAC short
Engine board defective
Fusing thermopile (TH2) defective
Fusing thermistor (TH1) defective
Fusing temperature control software crashed
Release the SC code in the SP mode, and then cycle the machine off/on
to recover normal operation.
If TRIAC damaged, replace the PSU.
Replace the engine board (Printer model: BCU, MF model: SCB).
Replace the fusing thermopile (TH2).
Replace the fusing thermistor (TH1).
Error Name/Error Condition/Major Cause/Solution
Fusing thermistor (TH1) output error
Fusing lamp (end) disconnected
Overheating protection device triggered (blown fusing thermostat)
Release the SC code in the SP mode, and then cycle the machine off/on
to recover normal operation.
Replace the fusing thermistor (TH1).
Replace the fusing lamps.
Replace the fusing thermostats (TH3, TH4).
Error Name/Error Condition/Major Cause/Solution
When the zero-cross count is 45 to 54, the frequency is set to 50 Hz.
When the zero-cross count is 55 to 65, the frequency is set to 60 Hz.
For cases other than the above ranges, the low-frequency detection
count is added.
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Service Call
SM