MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

[Polarbear]

I got an mpc3300 into the workshop yesterday, that when you switch it on, sounds like it wants to start, and then it stops. All the usual lights are on except for the display.

I did a Google search and found this: MPC 3300 Dead Display panel - Ricoh, Savin, Gestetner - www.oasq.com

I replaced the polygon, but the dead display remained and sure enough: shining a torch on the dead display showed the sc202

After a discussion with a tech from another branch we looked at the BICU (which the link says is shot also in some instances).

We found a tiny resistor (close to the lower right power connector [they all have a "o" printed on them in white] was burnt so that the "o" was not visible. Replaced the resistor and started the machine, and all is well.

From what I understand it also happens on the MPC2500 series, so keep this in mind.

Just thought I would share this as it is quite a weird one!

[Polo-022]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

What about the polygon motor, was it faulty or not?

[buttalasso]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

I had the same problem with two mpc2800, the problem were fixed changing the LCDC board.

I got an mpc3300 into the workshop yesterday, that when you switch it on, sounds like it wants to start, and then it stops. All the usual lights are on except for the display.

I did a Google search and found this: MPC 3300 Dead Display panel - Ricoh, Savin, Gestetner - www.oasq.com

I replaced the polygon, but the dead display remained and sure enough: shining a torch on the dead display showed the sc202

After a discussion with a tech from another branch we looked at the BICU (which the link says is shot also in some instances).

We found a tiny resistor (close to the lower right power connector [they all have a "o" printed on them in white] was burnt so that the "o" was not visible. Replaced the resistor and started the machine, and all is well.

From what I understand it also happens on the MPC2500 series, so keep this in mind.

Just thought I would share this as it is quite a weird one!

[Eric1968]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

I got an mpc3300 into the workshop yesterday, that when you switch it on, sounds like it wants to start, and then it stops. All the usual lights are on except for the display.

I did a Google search and found this: MPC 3300 Dead Display panel - Ricoh, Savin, Gestetner - www.oasq.com

I replaced the polygon, but the dead display remained and sure enough: shining a torch on the dead display showed the sc202

After a discussion with a tech from another branch we looked at the BICU (which the link says is shot also in some instances).

We found a tiny resistor (close to the lower right power connector [they all have a "o" printed on them in white] was burnt so that the "o" was not visible. Replaced the resistor and started the machine, and all is well.

From what I understand it also happens on the MPC2500 series, so keep this in mind.

Just thought I would share this as it is quite a weird one!

This is a known problem, I had it also 2-3 times. But that you solved it by replacing a resistor is exceptional!

[Polarbear]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

What about the polygon motor, was it faulty or not?

I'm thinking it was as there is no other reason for that resistor to pop.

[sandmanmac]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

I'm thinking it was as there is no other reason for that resistor to pop.

I would agree, since it's always the defective Polygon that takes out the BICU, and there are actually lots of posts about this issue on this site too, but none that I've seen with a solution on the defective component on the BICU. This fix could prove to save substantial $$ in board repairs going forward.
Great post Polarbear! REP points for you!

[slot]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

if you can web browse to the copier i have seen the code on the home page
every time i have had this it is always bicu and polly motor

[Klydon]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

I have seen this issue a fair amount. Typically both the BICU and mirror motor need to be replaced. I have seen it where the display is fine on the machine and shows the SC202. In this case, you need only replace the mirror motor.

[nathan91]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Hello Polarbear, we have the same your problem and we have identified resistor to change. The problem is that the parts catalog for the Ricoh MP C 2800 do not indicate codes and values of the resistors and capacitors, which instead was going on until the model mp c 2500 . Can anyone help us and knows the value of the resistor to replace? Thanks in advance

[Polarbear]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Hello Polarbear, we have the same your problem and we have identified resistor to change. The problem is that the parts catalog for the Ricoh MP C 2800 do not indicate codes and values of the resistors and capacitors, which instead was going on until the model mp c 2500 . Can anyone help us and knows the value of the resistor to replace? Thanks in advance

Hi Nathan

I used a DMM and measured the surrounding resistors to get an idea of the values.

I then looked for a similar component on another defunct board, until I found one with similar values, desoldered it, and resoldered it on my board, and all was working fine!

Sorry I don't have any more info than that.

[nathan91]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Hi Nathan

I used a DMM and measured the surrounding resistors to get an idea of the values.

I then looked for a similar component on another defunct board, until I found one with similar values, desoldered it, and resoldered it on my board, and all was working fine!

Sorry I don't have any more info than that.

Many thanks Polarbear. With your suggestion and help from an electronics store we have solved the problem. Thank you again.

[shawncrowther]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Hi

Awesome information
Can you show photos of the affected resistors and also the values of the resistor if possible i have about 40 boards here that I can possibly repair for our testing purposes

Thanks

Shawn Crowther

[Polarbear]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Hi

Awesome information
Can you show photos of the affected resistors and also the values of the resistor if possible i have about 40 boards here that I can possibly repair for our testing purposes

Thanks

Shawn Crowther

Sorry for the low res cellphone photo. Look for the black resistors between the large white power connector and the row of capacitors. They are black surface mount devices with a white "0" printed on them.

I am not sure about the value, but if you measure all of them with a DMM, you will find that the one (which is normally discoloured as well) will have a vastly different value than all the others around it.

That one you will have to desolder and replace with another good one. It is normally a good idea to change the polygon motor assembly as well as this causes the fault - and Ricoh has brought out a modified motor that is redesigned to prevent this failure in future.

Hope this helps.

[shawncrowther]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Thanks for this

In regards to the soldering process
What wattage iron is best suited for this practice

[Polarbear]

Re: MPC2800/3300 display dead mc tries to start (SC202) - SOLVED!

Thanks for this

In regards to the soldering process
What wattage iron is best suited for this practice

I use a 25watt as far as I can remember. There is very little solder on these resistors as they are fairly small and surface mount.

Patience and steady hands!