Brother MFC 9420CN Color Laser Printer

I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present. And I discovered the tension release pins
on the belt cartridge were still inserted (they are to be removed
before installing the cartridge).

Since a new belt costs in excess of $200, I would prefer to establish
the cause of the error message before spending that much money. There
are no obvious pressure or optical switches to detect the presence of
the OPC belt. Does anyone have any experience servicing these?

PlainBill

 

On Mon, 22 Feb 2010 11:23:37 -0700, PlainBill47@yahoo.comwrote:

I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present. And I discovered the tension release pins
on the belt cartridge were still inserted (they are to be removed
before installing the cartridge).

Since a new belt costs in excess of $200, I would prefer to establish
the cause of the error message before spending that much money. There
are no obvious pressure or optical switches to detect the presence of
the OPC belt. Does anyone have any experience servicing these?

PlainBill

Remove the pins.
Do a factory reset.

 

[circuit]

That means the photodiode or whatever they are using to detect the presence
of the opc belt is not being triggered. Could be toner on the sensor, or
the release pins may be somehow preventing the detection.




<PlainBill47@yahoo.com> wrote in message
news:n6i5o51nbb7a0f08ga5kv333ng0h5c45ba@4ax.com...

I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present. And I discovered the tension release pins
on the belt cartridge were still inserted (they are to be removed
before installing the cartridge).

Since a new belt costs in excess of $200, I would prefer to establish
the cause of the error message before spending that much money. There
are no obvious pressure or optical switches to detect the presence of
the OPC belt. Does anyone have any experience servicing these?

PlainBill

 

[Jeff Liebermann]

On Mon, 22 Feb 2010 11:23:37 -0700, PlainBill47@yahoo.com wrote:

I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present.

Try reseting the OPC counter:
<http://solutions.brother.com/Library/pdf/sl4cfb/sl4cfb_op_en.pdf>
The procedure is at the end.

However, I don't think it will fix the problem. Some sensor (optical
or microswitch) is not working when you insert the OPC belt cart. That
sometimes happens when the wrong cart is crammed into the printer.
Brother makes several that are similar. Verify the number. My
guess(tm) is that there's a microswitch somewhere inside that
activates when the OPC belt cart is inserted, and the connector at the
end of its cable is unplugged from the last person that was inside the
printer. Reading between the lines of your posting, it seems there
was some previous work done.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Jeff Liebermann]

On Tue, 23 Feb 2010 10:20:06 -0800, Jeff Liebermann <jeffl@cruzio.com>
wrote:

Try reseting the OPC counter:
http://solutions.brother.com/Library/pdf/sl4cfb/sl4cfb_op_en.pdf
The procedure is at the end.

Ooops. That won't work with the MFC 9420CN. It has a chip on the OPC
cart. See:
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120501369126>
for a replacement.

I still think it's a bad insertion sensor (microswitch) or cable
connector.

Note that the chip is usually a PCB with a chip wire bonded or glued
to the PCB and covered with epoxy. I destroyed one by pushing on the
epoxy. They're quite fragile.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

On Mon, 22 Feb 2010 13:36:57 -0500, Meat Plow wrote:

On Mon, 22 Feb 2010 11:23:37 -0700, PlainBill47@yahoo.comwrote:

I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present. And I discovered the tension release pins
on the belt cartridge were still inserted (they are to be removed
before installing the cartridge).

Since a new belt costs in excess of $200, I would prefer to establish
the cause of the error message before spending that much money. There
are no obvious pressure or optical switches to detect the presence of
the OPC belt. Does anyone have any experience servicing these?

PlainBill

Remove the pins.

Already done.

Do a factory reset.

'Factory reset?' I've reset the OPC counter, and checking the other
counters(page, drum, fuser), they all appear to have been reset. Is
there one I've missed?

PlainBill

 

On Mon, 22 Feb 2010 15:13:59 -0500, "circuit" <circuit@123456.tv>
wrote:

That means the photodiode or whatever they are using to detect the presence
of the opc belt is not being triggered. Could be toner on the sensor, or
the release pins may be somehow preventing the detection.



My idea also. However, the presence of a microswitch is non-obvious,

and there are no signs of optical sensors present. Or maybe I've been
barking up the wrong tree. I've been thinking in terms of a detector
that would be blocked by the cartridge. Perhaps a reflective sensor
that detects the presence of a cartridge. Thanks, some good ideas.

PlainBill

PlainBill47@yahoo.com> wrote in message
news:n6i5o51nbb7a0f08ga5kv333ng0h5c45ba@4ax.com...
I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present. And I discovered the tension release pins
on the belt cartridge were still inserted (they are to be removed
before installing the cartridge).

Since a new belt costs in excess of $200, I would prefer to establish
the cause of the error message before spending that much money. There
are no obvious pressure or optical switches to detect the presence of
the OPC belt. Does anyone have any experience servicing these?

PlainBill

 

On Tue, 23 Feb 2010 10:25:45 -0800, Jeff Liebermann <jeffl@cruzio.com>
wrote:

On Tue, 23 Feb 2010 10:20:06 -0800, Jeff Liebermann <jeffl@cruzio.com
wrote:

Try reseting the OPC counter:
http://solutions.brother.com/Library/pdf/sl4cfb/sl4cfb_op_en.pdf
The procedure is at the end.

Ooops. That won't work with the MFC 9420CN. It has a chip on the OPC
cart. See:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120501369126
for a replacement.

I still think it's a bad insertion sensor (microswitch) or cable
connector.

Note that the chip is usually a PCB with a chip wire bonded or glued
to the PCB and covered with epoxy. I destroyed one by pushing on the
epoxy. They're quite fragile.
Thanks,

I'll see if I can locate anything. You sugestion of an incorrect
cartridge is also worth looking into.

PlainBill

 

On Tue, 23 Feb 2010 14:54:01 -0700, PlainBill47@yahoo.comwrote:

On Mon, 22 Feb 2010 13:36:57 -0500, Meat Plow wrote:

On Mon, 22 Feb 2010 11:23:37 -0700, PlainBill47@yahoo.comwrote:

I'm trying to repair this multifunction color laser printer / copier /
fax / scanner. The person who gave it to me indicated it needed a new
OPC belt. Sure enough, when powered up it gives a message "No OPC
Belt. Install OPC Belt" Unusual, the normal message is "Replace OPC
belt". Once I found out how to replace the OPC belt, I discovered the
belt was already present. And I discovered the tension release pins
on the belt cartridge were still inserted (they are to be removed
before installing the cartridge).

Since a new belt costs in excess of $200, I would prefer to establish
the cause of the error message before spending that much money. There
are no obvious pressure or optical switches to detect the presence of
the OPC belt. Does anyone have any experience servicing these?

PlainBill

Remove the pins.

Already done.
Do a factory reset.

'Factory reset?' I've reset the OPC counter, and checking the other
counters(page, drum, fuser), they all appear to have been reset. Is
there one I've missed?

Nope. Jeff suggested an incorrect cart. Might be worth investigating.
I can put an HP4000N back together in my sleep but most of my
dealings with clients who owned multi-function devices was that they
leased these things and they were serviced by the lessor.