Ricoh MPC 3502 SC 562

[Pireq]

Hi,
I have a troubles with error sc 562 on ricoh mpc 3502 ..
I have changed the fuser sleeved roller and after that machine works fine one day and sc 562 occurs when i do sc code reset machine works next 1 day and die.. next sc reset next 50 copies and next sc 562.. i checked the Fuser temp display in service mode and at fuser pressure roller end temp= -1 deg then i have changed thermistor AW10-0144 and AW10-0143 now temp display at fuser pressure roller = 5 deg and sometimes 1 deg is it a fine temp ? :O but machine works fine about 3 days maybe and today i have next sc562 error....

[Mark Bbb]

wait and see

[Brianneoe]

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
562 A
Pressure roller thermistor warm-up error: End
The heating roller rotation sensor does not reach 20°C for 100 seconds
after the fusing/paper exit motor has turned on with sheets of 257 mm
or more in width.
1. Dirty thermopile lenses
2. Defective thermistor
 Clean the thermopile lenses.
 Replace the thermistor at the end of the pressure roller

[fshead]

you say you changed "fuser sleeved roller"..
Did you change just the sleeve from aftermarket sources or the whole fuser sleeve
assembly?

[slimslob]

Every time I have had a pressure roller SC on an 02, I have had to replace the thermostat, not the thermistor.

[Coptech]

Just thinking outside the box but there was a time that more of the new heat sleeve assemblies came with bad lamps out of the box than worked. Is it possible that it is not "dead cold" when you reset the code and one lamp can warm it to operating temperature and maintain it? It sits over night, goes to sleep, and one lamp is not sufficient to take it to ready temp before timing out...just a thought. Take a meter to the lamps and make sure one is not open.

[mikadonovan]

Every time I have had a pressure roller SC on an 02, I have had to replace the thermostat, not the thermistor.

Me, too.

Just thinking outside the box but there was a time that more of the new heat sleeve assemblies came with bad lamps out of the box than worked. Is it possible that it is not "dead cold" when you reset the code and one lamp can warm it to operating temperature and maintain it? It sits over night, goes to sleep, and one lamp is not sufficient to take it to ready temp before timing out...just a thought. Take a meter to the lamps and make sure one is not open.

Last year I had a whole shipment of sleeves with this issue.

[Pireq]

Problem is solved

The reason of Error SC 562 was frayed cable of thermistor at end of pressure roller.... but at blue connector, so when i changed themristor to a new one nothing happens before

Thanks all for fast replies and help