[Error Code] Ricoh mpc3500 IH Coil tested bad.

[odie]

I am working on a Ricoh mpc3500 (copier has a SC580 error code will not reset)
Service manual shows that the problem might be in the IH Inverter, or with the IH coil.
I have checked The IH coil units two connectors, that go to CN983. The two wires showed no continuity across pins 1 to 4, which would indicate that the thermostats (fuse) on the coil
were open. I know that next I will need to replace the IH Coil.
My question is, to replace the IH coil requires a few hours to get it out and replacing it. I want to
be certain my IH coil is the problem. Could I put a jumper across pin 1 & 2 on (Cn983) on the inverter board so I could power up and see if the SC580 clears (just a test jumper for a few seconds).

Thanks for any input
Gerry

[anothertech]

Re: Ricoh mpc3500 IH Coil tested bad.

I don't know about jumping it, sounds like possibility of doing more damage. Can you try to reset TS3 and TS4?

[anothertech]

Re: Ricoh mpc3500 IH Coil tested bad.

IH COIL UNIT

• The IH coil unit has two connectors, Check CN983 a 4 pin connector for continuity across pins 1 to 4, this will confirm the condition of the two thermostats, TS3 and TS4.
  
• Check across T1 to T2 for continuity. This will check if the IH coil has an open circuit or not.

[Action]

• If either of these two test show an open circuit replace the IH coil unit.

[Cause]
IH INVERTER BOARD

• Check if the fuse has blown. Replace and try after first checking the above checks for the IH Coil Unit. A blown fuse may indicate a wire shorted or an internal short of the Inverter coil unit.
• On the IH inverter board check the input voltage from the PSU. CN 981 provides the AC input.
• On the IH inverter board check CN984 pin 1 for +12vdc input voltage from PSU.

[Action]

• If either of these input tests fail check or replace the PSU.
• If the input checks are OK and the IH Coil Unit checks are OK then replace the IH Inverter Board.

[anothertech]

Re: Ricoh mpc3500 IH Coil tested bad.

[Cause]
A part with insufficient strength (not sufficiently filled with resin) is in the Sirocco Fan (AX650045).
Over time due to degradation, the Sirocco Fan becomes cracked (or damaged), the airstream to the IH coil is insufficient, and there isn't enough cooling of the fusing unit. The result is that the IH coil's thermistor reacts, and SC580 occurs.
[Resolution]
Replace the Sirocco Fan (AX650045) and the IH Coil (B2234349) when SC580 occurs due to a damaged Sirocco Fan.
As of 08/24/07: As a measure to prevent Sirocco Fan damage, the injection pressure was increased when the fan is molded to improve the strength of the part. Also, all the service parts in the current warehouse have had this measure taken.

[odie]

Re: Ricoh mpc3500 IH Coil tested bad.

How can I reset TS3 and TS4. with out removing the ih coil.
I heard you might be able to pop them forward to reset them, but how can this be done.

[qbert69]

Re: Ricoh mpc3500 IH Coil tested bad.

How can I reset TS3 and TS4. with out removing the ih coil.
I heard you might be able to pop them forward to reset them, but how can this be done.

Hmmm......

MAYBE....if you take a can of compressed air, invert it and spray it on the popper, it *might* reset without you having to take it out!

From my understanding, the thermostat "popper" utilizes a bimetallic strip...read about it here!:

https://en.wikipedia.org/wiki/Bimetallic_strip

You're just trying to reverse the process with an icy cold blast from an inverted air can!....It will spray liquid!

GOOD LUCK!

[Coptech]

Re: Ricoh mpc3500 IH Coil tested bad.

I have heard different solutions to keep from having to pull the IH unit. Some have been as simple as taking a pin and trying to grab the disc and pop it back out, some say they have superglued a straw from canned air to the center and pull it out, I have even heard of hot glueing something and giving it a quick jerk. Get creative and let us know what works for you. I like the slowing fans theory of them blowing but all I have seen so far was customer thinking it was some sort of a reset button when it was staring at them in the middle of the IH plate and "pushing the reset button". Bad engineering, it should never have been that accessible and tempting for an end user.

If you go to the trouble of removing the thermostats and one is not available to replace it, my method of choice is to turn my canned air upside down, spray the shit out of it until it freezes, and throw it against the wall to reset it.

[anothertech]

Re: Ricoh mpc3500 IH Coil tested bad.

I have heard techs are having good luck using Gorilla tape to pull it back out.

[slimslob]

Re: Ricoh mpc3500 IH Coil tested bad.

I am working on a Ricoh mpc3500 (copier has a SC580 error code will not reset)
Service manual shows that the problem might be in the IH Inverter, or with the IH coil.
I have checked The IH coil units two connectors, that go to CN983. The two wires showed no continuity across pins 1 to 4, which would indicate that the thermostats (fuse) on the coil
were open. I know that next I will need to replace the IH Coil.
My question is, to replace the IH coil requires a few hours to get it out and replacing it. I want to
be certain my IH coil is the problem. Could I put a jumper across pin 1 & 2 on (Cn983) on the inverter board so I could power up and see if the SC580 clears (just a test jumper for a few seconds).

Thanks for any input
Gerry

Yes. I have done so with the MP C4000. If you, or a customer, have the fusing out and inadvertently press the thermostat, there is a high likely hood that it will open. Why Ricoh does not make that thermostat available I have no idea.

[odie]

Re: Ricoh mpc3500 IH Coil tested bad.

Thanks great info.

I have a replacement IH coil, and I have ordered a new Sirocco Fan (AX650045).
While I wait for the fan I might still try to reset the fuse before I tear into it more.

[samir adam]

Re: Ricoh mpc3500 IH Coil tested bad.

I have this SC before just clear older toner from the middle of the IH coil you find it when you remove the fuse unit it's easy but you should be careful

Sent from my D5322 using Tapatalk

[slimslob]

Re: Ricoh mpc3500 IH Coil tested bad.

I have this SC before just clear older toner from the middle of the IH coil you find it when you remove the fuse unit it's easy but you should be careful

Sent from my D5322 using Tapatalk

be careful doing that as you could trip the thermostat.