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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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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 |
#2
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Brother MFC 9420CN Color Laser Printer
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. wrote in message ... 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 |
#4
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Brother MFC 9420CN Color Laser Printer
On Mon, 22 Feb 2010 13:36:57 -0500, Meat Plow wrote:
On Mon, 22 Feb 2010 11:23:37 -0700, rote: 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 |
#5
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Brother MFC 9420CN Color Laser Printer
On Mon, 22 Feb 2010 15:13:59 -0500, "circuit"
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 wrote in message .. . 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 |
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