Ricoh MP C6502SP Field Service Manual page 1091

SC No. Level Error Name/Error Condition/Major Cause/Solution
Error detected by the TDCU.
If a command sent from the TDCU indicates an error, the engine issues an
SC.
ASAP command: Motor lock detection setting value (engine to TDCU):
0x5B
See table below for ASAP commands notifying SC detection.
Details:
TDCU Motor lock signal criteria:
• Drum motor
High if the motor speed is not within the range of target value ±
6.25%.
Low if the motor speed is within the range of target value ± 6.25%.
• ITB drive motor, PTR Motor
High if the motor speed is not within the range of target value ±
6.25%.
Low if the motor speed is within the range of target value ± 6.25%.
Target value:
If the default motor speed was adjusted using the SP, the adjusted value is
used as the target value.
Specification:
When the motor is on, each lock signal is checked every 100
milliseconds. If the High status is detected 20 times consecutively, the
machine determines that the motor is not running correctly. The machine
issues an SC and stops the motor.
Service Call 400-498
1089