Error 32 - Unsupported Print Cartridge - Replaced all 4 toner carts and stil getting the error. Could a bad (siezed up) toner cart have caused one (or more) of the rollers in the front cover to shift out of position? I have a service manual, but there is no discussion of what these 'rollers' in the front cover do, or how they communicate with the rest of the printer.

Try finding out if the rollers in the front cover rotate. If they do you should hear a klikking sound in the front cover. If not there is a problem in the mechanics of the frontcover.

I found the Lexmark checklist for you:

Missing toner cartridge service check
1 Remove toner cartridge in
question. Holding toner
cartridge with developer
roller away from you, check
toner present sensor
actuators located on left
rear of toner cartridge. Are
actuators damaged?
Replace toner
cartridge.
2 Insert toner cartridge and
ensure toner present
sensor flag moves forward.
Remove toner cartridge.
Toner present sensor flag
should spring forward.
Does toner present sensor
flag operate correctly?
Go to step 3. Replace toner
present sensor.
3 Turn printer off and remove
I/O board shield. Is
cable properly connected
to I/O board connector
DCN2?
Go to step 4. Properly connect
cable.
4 Reconnect operator panel.
Turn printer on. Touch
negative lead of voltmeter
to metal bracket that holds
I/O board to obtain ground.
Touch positive lead to
DCN2 pin 2 to ensure 5
VDC is being supplied to
toner present sensor. Is 5
VDC present?
Go to step 5. Go to step 8.
5 Check voltage level on
DCN2 pin 1. Is 5 VDC
present?
Go to step 6.
6 Push toner cartridge fully
in. Check voltage level on
DCN2 pin 1. Is 0 VDC
present?
Replace I/O
board. If
problem
persists, replace
engine controller
board. See
Replace toner
present sensor.
7 Turn printer off. Check
cable for continuity that
connects DCN2 pins 1, 2,
and 3 to toner present
sensor. Also check for
shorted pins. Is cable
okay?
Replace toner
present sensor.
Replace cable.
8 Touch positive lead to
DCN13 pin 9 to ensure 5
VDC is being supplied to I/
O board. Also check pin 11
for 5 VDC. Is 5 VDC
present?
Replace I/O
board. Go to step 9.
9 Check cable continuity
between LVPS ACN1 and I/
O board DCN13. Also
check for shorted pins. Is
cable okay?
Replace LVPS. Try finding out if the rollers in the front cover rotate. If they do you should hear a klikking sound in the front cover. If not there is a problem in the mechanics of the frontcover. I found the Lexmark checklist for you: Missing toner cartridge service check 1 Remove toner cartridge in question. Holding toner cartridge with developer roller away from you, check toner present sensor actuators located on left rear of toner cartridge. Are actuators damaged? Replace toner cartridge. 2 Insert toner cartridge and ensure toner present sensor flag moves forward. Remove toner cartridge. Toner present sensor flag should spring forward. Does toner present sensor flag operate correctly? Go to step 3. Replace toner present sensor. 3 Turn printer off and remove I/O board shield. Is cable properly connected to I/O board connector DCN2? Go to step 4. Properly connect cable. 4 Reconnect operator panel. Turn printer on. Touch negative lead of voltmeter to metal bracket that holds I/O board to obtain ground. Touch positive lead to DCN2 pin 2 to ensure 5 VDC is being supplied to toner present sensor. Is 5 VDC present? Go to step 5. Go to step 8. 5 Check voltage level on DCN2 pin 1. Is 5 VDC present? Go to step 6. 6 Push toner cartridge fully in. Check voltage level on DCN2 pin 1. Is 0 VDC present? Replace I/O board. If problem persists, replace engine controller board. See Replace toner present sensor. 7 Turn printer off. Check cable for continuity that connects DCN2 pins 1, 2, and 3 to toner present sensor. Also check for shorted pins. Is cable okay? Replace toner present sensor. Replace cable. 8 Touch positive lead to DCN13 pin 9 to ensure 5 VDC is being supplied to I/ O board. Also check pin 11 for 5 VDC. Is 5 VDC present? Replace I/O board. Go to step 9. 9 Check cable continuity between LVPS ACN1 and I/ O board DCN13. Also check for shorted pins. Is cable okay? Replace LVPS.

This is what I found at Lexmark service information.

If the printer thinks that a non-Lexmark cartridge is being used, the Operator Panel will post a “32 Unsupported Cartridge” error.
This occurs when the toner key sensor is not tripped by the cartridge key. The Operator Panel will post a “32 Unsupported Cartridge” error.


Resolution:
A number of things can cause this error. The logical sequence for fixing this should be the following:

• Correctly re-install the toner cartridges and be sure that they are Lexmark keyed.
• Bend the tabs on the left side of the cartridge out slightly.
• Check the left side of the front door for proper seating, if bent too far out the cams will not push the cartridges into the sensor.
• Check the toner key sensor 12G7062 connection to the IOD1 connector DCN15. Re-seat the connector and replace sensor if necessary.
• If all else checks OK, replace the toner key sensor. A common failure is the metal hinge will be bent as illustrated in the picture on the next page.

I cann not send you the picture this way. If you need it please send me your mail adress This is what I found at Lexmark service information. If the printer thinks that a non-Lexmark cartridge is being used, the Operator Panel will post a “32 Unsupported Cartridge” error. This occurs when the toner key sensor is not tripped by the cartridge key. The Operator Panel will post a “32 Unsupported Cartridge” error. Resolution: A number of things can cause this error. The logical sequence for fixing this should be the following: • Correctly re-install the toner cartridges and be sure that they are Lexmark keyed. • Bend the tabs on the left side of the cartridge out slightly. • Check the left side of the front door for proper seating, if bent too far out the cams will not push the cartridges into the sensor. • Check the toner key sensor 12G7062 connection to the IOD1 connector DCN15. Re-seat the connector and replace sensor if necessary. • If all else checks OK, replace the toner key sensor. A common failure is the metal hinge will be bent as illustrated in the picture on the next page. I cann not send you the picture this way. If you need it please send me your mail adress