who'd have thought a brand new machine would give me this much trouble? this code pops up about once a week. i replaced the center thermistor(it was all i had)no help. i have since gotten in a set of the two thermistors and am going to head out to put them in. is there anything else i should be looking for? pulling what little hair i have left out on this one. any help is appreciated!!
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who'd have thought a brand new machine would give me this much trouble? this code pops up about once a week. i replaced the center thermistor(it was all i had)no help. i have since gotten in a set of the two thermistors and am going to head out to put them in. is there anything else i should be looking for? pulling what little hair i have left out on this one. any help is appreciated!!
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Had this one on an MP6500. At first I replaced the 2 thermistors. Worked for a few days. Then I also replaced the thermostats and then it worked OK. -
I have a customer large insurance company who has several of these and I was having the same problem on one machine i was finally given the go ahead to replace the entire fusing unit.
but on the others including the the mp7500 all I did was changed all thermistors,thermostats and lowered the fusing temperature on all the machines I swear I have not had a problem since then it's been 4 months
They bought these machines and ran them all day long doing prints so the machine would barely maintain that high temperature.Comment
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Bad Thermistors or sometimes thermostats are the usual culprit.
I had a machine where the latch for the fuser section didn't pull it in to the machine tight enough.
Sometimes the thermistor gets bent away from the UHR a little.
I've seen harness problems on other machines cause SC codes plenty of times, but it seems to be extremely rare on these.
I guess the biggest cause for me is bad power. I have several of these in older buildings and govt accounts where we know the wiring was done on the cheap, and we end up resetting 2 or 3 a week where the fuser is in pristine condition. I left a power monitor on one of these for a week, and the fault list scared people. We tried to talk the customer into putting power conditioners on the machine, but they didn't like the price tag.
Even accounts with decent power a good thunderstorm can set off 2 or 3 of them.73 DE W5SSJComment
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We have had several of these do this and we've been replacin the thermostats (all 3) and have not been back to any of them since. been 3 months on 2 of them.Comment
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I've got about 12 of these at a govt installation. I was getting one or two calls a month for SC555's. I finally decided to try some t/s on one that was throwing the code every two or three days. I changed the AOF to off and the problem stopped. Went back a couple weeks later to turn it back on with the expectation that I would start getting the codes again. Hasn't come back since.
Go ahead and laugh. I just figured there was no way in hell that every one of those machines had bad thermistors. They all made the cutoff for the newer version thermistor.
I think there is a power/firmware issue going on here.Comment
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I agree turning AOF off helps. I have done that too. It seems like many times the code comes up the first time they try and use the machine that day and it has to power up. I haven't tried turning it back on if it's working I'm not changing anything
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I had this on several 2060s - check that none of the wires are trapped by the cable tidy clip things under the top fuser cover which you remove to get access to the thermistors.Comment
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It is important to Install all three new thermostatstogether as a set.
There is a bulletin out on SC 555 chech it out RTB21 RB246021
Old part number New part number
AW110040AW110064 Thermostat:192C x2
AW110052 AW110066 Thermostat:211C x1
What? HuH?
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Someone mentioned modified thermistor brackets. I've just had the latest technical DVDs and there is no mention of them but they are available on the online ordering system in the UK!Comment
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We have the same problem with a MP7500 - we go there every morning as soon as they open to clear the code then it runs good all day. Its around 3am every night when the error occurs.
First we replaced all thermisters and thermostats with the correct P/N's. Then we used the modified P/Ns. Then we found out about the modded brackets - that have a 2 month back order.....
Cause its happening around 3am its gotta be the cold or something causing it so thinking im gonna put the machine on one of those timers to turn off at 9pm and turn on at 7am.Comment
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We've received the new brackets and are starting to replace them as needed. I've had one Tech say that the new one looked the same as the old one, but he was on a new machine, possibly a MP6001. I've asked the other Techs to keep me informed.
On a slightly related note, there is a new bulletin (D062-003) just out on new retaining rings and HR bushings for the MP6001 series which I believe would go all the way back through the series. We've had lots of trouble with the retaining clip coming out of position allowing the HR bushing and bearing to move out and then the HR moves out of position.
Old # for ring B1404172, new # D0544175
Old # for bushing AE032026, new # AE032033Come on Fulham!Comment
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It made me laugh when they bought out a bulletin on the 22/27 cpm machines for the hard of thinking, to tell them which way round to put the heat roller clips on!Comment
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Solution to SC555
I had a MP6000 which burned me many times with this code. My solution worked and I haven't been back to that machine since (knock on wood).
Step 1:
Check the lamp connectors (females specifically). From the factory they split and are not making good connection. I took my tweaker and pinched them so they were tighter. Depending on which lamp connectors are loose, you will get either 555 (fror the one lamp) or 546 codes ( for the other lamps). When I cheated the front door and would play with the lamp connectors I could get the machine to pop those codes, that is how i knew those connectors were an issue.
Step 2:
Per Ricoh, disable the 'panel off timer':
1) User tools
2) System Settings
3) Timer settings
4) Panel off timer, turn to off.
Let me know if this works for you, because I worked diligently and it seemed to work for me.Comment
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