My ricoh 1022 after puting power on it shows error code sc542

Fusin temperature do not reach the terperature of work in 20 sec.
• Poor connection of the fusing unit
• Fusing thermistor defective or out of
position
• Fusing lamp open
• Fusing thermostat open
• Power supply board defective
This condition be clear when entering to service program mode press "Total Clear (yellow key) 1 0 7 and to maintain presed the clear stop key (orange key) more 3 sec.

The procedure depends on the actual error code....more info required.

What code? Try entering service mode then turn off copier and turn it back on. (push these buttons in sequence Clear modes (yellow) 1 0 7 then hold the red stop button for 5 or so seconds you are now in test mode