Ricoh MP 4500 says door open

[Rick]

I was just performing maintenance installing new drum unit and when I closed the doors the message stayed on the display to close door as shown but there is no
open door displayed . I opened and closed each door and watched as the display showed me that the doors were actually opening and closing . But still it displays the message to close door as shown but no door is open . What did I do to create this problem ?

[Eric1968]

Check the door switches?

[Rick]

Check the door switches?

I did check them and they seem to be working . The display says open door but doesnt indicate which door .

[nmfaxman]

Blown 24v fuse on the power supply will give a constant door indicator.

[vargue]

clean front door switches very well. if it's not work out replace switches 24v dc

[collme]

Blown 24v fuse on the power supply will give a constant door indicator.
I second that

[JustManuals]

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[nmfaxman]

4.3 BLOWN FUSE CONDITIONS
Fuse Rating
115V 210 ~ 230V
Symptom at power on
Power Supply Board
FU1 6.3A / 125V 6.3A / 250V “Doors/Covers Open” is displayed
FU2 6.3A / 125V 6.3A / 250V “Doors/Covers Open” for the finisher is
displayed
FU3 6.3A / 125V 6.3A / 250V Paper end condition
FU5 6.3A / 125V 6.3A / 250V SC302, or SC403, or SC405 displayed
FU6 3.15A/125V 3.15A/250V
FU9 5A/125V 5A/250V
FU10 3.15A/250V 2A/250V
FU11 5A/250V 5A/250V
FU101 15A / 125V 8A/250V No response
FU102 10A / 125V 5A / 250V No response
FU103 2A / 125V 1A / 250V Normal operation (optional heaters do not work)

Right out of the service manual.

[hafn]

I was just performing maintenance installing new drum unit and when I closed the doors the message stayed on the display to close door as shown but there is no
open door displayed . I opened and closed each door and watched as the display showed me that the doors were actually opening and closing . But still it displays the message to close door as shown but no door is open . What did I do to create this problem ?

I have the same problem, can you help?

[sandmanmac]

I have the same problem, can you help?

So you're saying that none of the above solutions has worked for you?
(I doubt it)

[Rick]

I have the same problem, can you help?
make sure the door magnets are in place properly

[Rick]

make sure the door is closing all the way . The magnets can come loose and stop the door from closing completely . Thats what was wrong with my unit .

[hafn]

make sure the door magnets are in place properly

ok
The problem occurs once in a while. The display says door open but does indicate which door.

[slimslob]

I have the same problem, can you help?


So you're saying that none of the above solutions has worked for you?
(I doubt it)

Me thinks he just replied to the thread without reading the thread. Appears to be a newby.

[Oze]

The door switches that sit above fuser(stoopid idea) get baked with toner and need to be replaced...used to happen all the damned time with 3500/4500 back in the day....replace them and all will be well.

[imihm]

I was just performing maintenance installing new drum unit and when I closed the doors the message stayed on the display to close door as shown but there is no
open door displayed . I opened and closed each door and watched as the display showed me that the doors were actually opening and closing . But still it displays the message to close door as shown but no door is open . What did I do to create this problem ?

Hi

Please make sure that one of the interlock switch actuator is not broken try to check them using interlock switch cheater tool

thanks

[ali.alhaj]

check the cable of the laser unit at the front door, the laser cable may cause this problem.

[zsoltee0001]

I have this problem with sp 8200. The psu 24v fuse was open/ 10amper . Which caused an short circuit ön the Io board (stepper motor ic error )

[Filipe]

check the cable of the laser unit at the front door, the laser cable may cause this problem.
Where is the laser cable can u send me a pict of it PS.