WHEN SC672 (CONTROLLER START UP ERROR) IS DISPLAYED Ricoh MP C2004 C2504 Service Manual

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Troubleshooting

4. Replace PSU

6.12.7 WHEN SC672 (CONTROLLER START UP ERROR) IS DISPLAYED

Symptom

Note: CTL = Controller The following occur:

SC672-00	Communication error between operation panel and CTL after machine is powered on.
SC672-10	Communication error (receive) between operation panel and CTL after machine is powered on.
SC672-11	Communication error (send) between operation panel and CTL after machine is powered on.
SC672-12	Communication error between operation panel and CTL after normal start-up.
SC672-13	Communication error between operation panel and CTL after normal start-up; Operation panel not detected.

 SC672 does not appear on the SMC report, as it is not logged.

 The Smart Operation Panel communicates with the controller via a USB cable and IPU. SC672 is triggered when the panel cannot communicate with the controller.

Causes

Possible causes of SC672 include:

 USB communication path failure (USB cable, IPU)

 CTL boot up error and/or operation panel boot up error due to abnormal break in operations of CTL.

Possible causes of operation panel cannot light include:

 USB communication path failure (USB cable, IPU)

 Operation panel cannot communicate with CTL due to CTL boot-up error

Symptom Causes Solutions [A]: LEDs on the controller board [B]: Abnormal mode: LEDs on the controller board [C]: Reconnecting and replacing the USB cable [D]: Replacing the Memory [E]: CMOS clear [ F]: Fuse on the IPU

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