sc546 1035

[aabarnes1]

This problem keeps popping up on the same box. All therms and stats replaced, psu good- any ideas

[banginbishop]

Have you gone into sp 1106 and looked at the display to see whats hapening with the temp. How old are the lamps on this, as this m/c was discontinued in about 2000 ish.

It could be the bicu board as this does the timing or try another complete fuser from the grave yard if you can .You say the power suppy is fine have you changed it for another? check the connectors for the fuser housing.

I've got a similar one doing sc 542 and i've replaced the lamps and thermistors as it doesnt warm up quick enough - lamps come on etc so i'm getting hold of a power supply and complete fuser from another spare machine.

[cobiray]

How new is the hot roller? Any build up on the roller where the thermistors ride?

[kjg]

If you can, I agree with swapping the fuser to see if code follows fuser. I got one on off lease that someone stuck an aftermarket hot roller in. Thr hot roller was twice as heavy as an OEM roller. It would come to ready, then code out soon after use.

[Rorschach]

If you've replaced the thermistors and thermostats, and the PSU is known to be good, try looking at the connection between the fuser and the plug in the frame of the machine to make sure it has a solid connection.

Also, check the voltage readings at this connection as well as at the IO Board with your meter. I'm thinking that you'll find the problem lies in one of these two spots.

[imaginemoko]

have we check the machine supply... proper grounding... volatge supply to the machine.. fluctuating current...?

[aabarnes1]

sc546

The power supply in this building is very new and spike protected, as for the hot roller, a new pm kit went in 10k ago so I think i'm gonna have to look at the voltages and conections. Will post results.Thanx

[tcs04]

May seem strange but,

Have an old note on the laptop re "AF1045 SC542 etc"

Change Plate: Thermistor B004 4087. Qty 2. Page 46 Item 40.

Plate behind thermistor breaks down causing service codes.

This came from John Eden, RUK techbloke some time ago.

Also, if the fuser has the red double ended connectors into which the thermistors clip, change them. they can also cause fuser codes. can't remember the number and it's not in the manual, but Ricoh can provide.

[jarhead2020]

Seen that one many times replace the fuser harness on the fuser itself part #
B298 4217. Also make sure to get rid of most of the black toner goo on the fuser, check the lamps wires for any bare spots, and clean the harness of the machine side with contact cleaner

Good luck

[tcs04]

Jarhead2020 could be right BUT check the part number for your local market! there is a loop at the rear of the fuser plug to initiate the "Fuser set" check and the link is between different pins depending on the target market (voltage) of the machine. I have had an engineer fit a U.S loom to a U.K machine (Not this model) and the display showed "Reset Fuser" until we swapped the pin connections.

[cosmic18]

I HAD LOTS PROBLEMS WITH THE CONNECTION BRACKET REAR OF FUSER UNIT MAKE SURE ITS LEVEL AND BENT IN ANY WAY

[EVA]

Replace fuser connector

B0044117

[Lagonda]

We've had a few cases lately of the thermostat holder (B004 4105) going electricaly porous and leaking to earth. This usually trips the buildings earth leakage detector, not sure what happens if you dont have one of these. (apart from zapping the customer!)

[jummamaster]

In most cases it was caused by low power supply voltage.