Ricoh MPC 2000 - printing bad copies.

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

SC 565 is usually something to do with the pressure temperature. Use your multi meter and check the pressure thermostat and pressure roller heater lamp. One of those is probably open. You will still have to deal with the print quality issue unless it was caused by bad fusing.

Update on fusing unit.

1. AW11 0059 Thermostat:190C - CH152(make) - reads 0.4 to 0.6 ohm. which is as per manufacturers spec.
2. AW11 0058 Thermostat:177C - CH152(make) - reads 0.4 to 0.6 ohm. which is as per manufacturers spec.
3. AW11 0055 Thermostat:146/147 C : One reads 0.4 to 0.6 ohm. Other Open. Sigh, i believe this is the one we are looking at.(CH152-35)

Link:
CH-152-35 ... - Datasheet Search Engine Download

4. Heater Toshiba JH213V250WR1A : Reads 20 ohm (19.2 ohms to be precise )
5. Heater Toshiba JHX213V 460/640W Coil1:6.8 ohm Coil2:9.2 ohm.

I am confident that these parts are alive,except a thermostat which is a series combination of 2 . Please advise, if i've missed any point.