Ricoh D0C8, Service Manual

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SC3xx: Image Processing
D0CA/D0C9/D0C8/D0CB 6-28 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC362-01 D TD Sensor (Vt) Lower Limit Error 1: K
SC362-02 D TD Sensor (Vt) Lower Limit Error 1: C
SC362-03 D TD Sensor (Vt) Lower Limit Error 1: M
SC362-04 D
TD Sensor (Vt) Lower Limit Error 1: Y
The machine detects that Vt (TD sensor output, SP3-210-001 to 004) is lower
than the lower limit threshold for the specified consecutive times..
• TD Sensor (S14) connector is disconnected.
Check if the SC occurs by turning the power OFF then ON. If the SC occurs
again, do the following steps. Check if the SC reoccurs by cycling the power
after each step.
1.
Check all the connectors are firmly connected. Confirm the
connectors of the PSU exhaust fan (FAN4) are connected when
installing the options listed below:
•
Dehumidification Heater (PFU)
•
Dehumidification Heater (main unit)
•
Anti-condensation Heater
2.
Check the PCDU for the following points and recover or replace it if
there are any defects.
•
Gear comes off.
•
PCDU is not installed correctly.
3.
Check the TD Sensor (S14) and recover or replace it if there are any
defects.
4.
Check the parameters (e.g. SP3-030-061 through -064 should be
changed from its initial value, but could be not changed due to
possible NVRAM clearing).
If there is an error to any SP parameter, replace the PCDU and then
execute SP3-320-001.
5.
Check the Toner Supply Unit for the following points and recover or
replace it if there are any defects.
•
The toner bottle is empty.
•
Toner bottle operation error
•
The toner supply path is clogged.
6.
Check the harness for TD Sensor (S14).
Replace the harness if it is disconnected, or damaged.
7.
Replace the BiCU (PCB1) if the SC cannot be recovered even after
executing steps 1 to 6.