Ricoh MP C6502SP Field Service Manual page 1207

Hide thumbs Also See for MP C6502SP:

Table of Contents

Error Name/Error Condition/Major Cause/Solution

Downstream device communication error (D751)

• Communication with the downstream device has established, but the

device is not responding to the command sent out, even after being

sent three times.

• The port level of the downstream device does not become H level

(break cancel) within specified time.

• Interface cable (downstream device side) connector disconnected

• Board defective (Buffer pass unit or downstream device)

• Replace the interface cable between buffer pass unit and

downstream device or reconnect the connectors.

• Replace the board (of the buffer pass unit or downstream device).

Error Name/Error Condition/Major Cause/Solution

Buffer pass unit_CTB_+24V_Power supply error

Detected +24V power OFF of the Buffer pass unit PCB: CTB.

• Buffer pass unit PSU defect

• Connecter disconnected

• Harness ground fault/broken

• 24V load (motor/fan) layer short

• PCB defective

• Fuse tripped (PSU, PCB)

• Replace the Buffer pass unit PSU.

• Reconnect the connector.

• Replace the harness.

• Replace the motor/fan.

• Replace the PCB.

Service Call 700-780

Chapters

Table of Contents