Service manual

SC920: SCU/RAM board abnormal

Type: 2

- Description -

The SCU executes the read/write test for the RAM board on the SCU

and the read/write operation is not successfully done. This SC is not

displayed just after the read/write test because the CPU enters the

hold state. It is displayed after the power switch is turned off and on.

- Detection Timing -

When the power switch is turned on

- Possible Causes -

• RAM board

SP-Log: 7-402-9

SC931: Printer NV-RAM abnormal

Type: 1

- Description -

When the main control board detects that illegal NV-RAM data has

been loaded from the SCU, it notifies the SCU of an anomaly.

- Detection Timing -

When the power switch is turned on

- Possible Causes -

• RAM board (Battery)

• Main control board

SP-Log: 7-402-9

SERVICE CALL CONDITIONS

A166/A187/A189 6-32 SM

CÓPIA NÃO CONTROLADA