Ricoh LI-MF1 M126, Field Service Manual

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Cooling Fan Service Check
FRU Action
Cooling fan
Make sure the fan cable plug is properly seated at J36 (engine
board).
Turn the machine on. Within a few seconds, the engine board
assembly should apply +24Vdc to pin2.
• If voltage is not present, then check or replace the engine
board ( p.51 "Engine Board Removal").
• If voltage is present, then check pin 1 for 24 V dc as well. If it
is close to 24 V dc while the fan is still idle, then replace the
fan ( p.59 "Fan Removal").
Cover Interlock Switch Service Check
• Make sure a print cartridge assembly is installed and the cover closes all the way, engaging the
cover open switch lever.
FRU Action
Cover interlock switch
Disconnect the cover interlock cable from the controller board at
J11.
With the machine turned off:
1. Verify continuity between cable pin 1 and pin 2 with the door
closed and discontinuity with the door open.
2. Verify continuity between cable pin 1 and pin 3 with the door
open and discontinuity with the door closed.
3. Verify discontinuity between cable pins 2 and 3 whether the
door is open or closed.
• If any fail, then replace the cover interlock switch.
• If both pass continuity, then turn the machine on, and measure
+5 V dc on pin 2 at J11 on the controller board.
• Verify pin 3 at J6 is ground.
• If voltage or ground is not present, then see “Engine Board
Service Check” in “Troubleshooting” for more information.
Service Checks
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