Process System Service Call; Fuser System Service Call - Toshiba DP1600 Service Handbook

4.1.11 Process system service call

C38 Replaced process unit error
Replace the relay PWA.
Replace the main PWA.

4.1.12 Fuser system service call

C41 Abnormality of the thermistor or heater disconnection when the power is turned on
Note: To prevent the danger, the following 1 and 2 should be done after the power-cord plug is un-
plugged.
1. Check the thermistor.
(1) Is the connector between the heater thermistor 1/2 and the relay PWA (CN44) disconnected?
(2) Is the harness of the heater thermistor 1/2 broken?
(3) Is the connector pin removed?
(4) Does the heater thermistor 1/2 connect to the heat roller firmly?
2. Check the heater lamp and the SSR (Solid State Relay).
(1) Is the heater lamp broken?
(2) Is the connector between the heater lamp and the PSU (CN3) disconnected?
(3) Has the heater thermofuse blown?
(4) Is the connector to the SSR unplugged?
(5) Has the SSR or the switching power supply failed?
3. Check the relay PWA.
(1) Is the connector CN44 disconnected?
(2) Is the connector pin removed?
(3) Is there a circuit abnormality, such as open or short circuit?
(4) Replace the relay PWA.
4. Reset the status counter
(1) The following processes are carried out after completing repair of the cause for the C41 error
message.
(2) Press the [0] and [8] keys simultaneously to turn on the power.
(3) Input 400 using the numeric keys, and press the start key.
(4) Change the displayed status counter from [2] to [0], and press the SET key (Reset C41).
(5) Turn the power on again, and check that it returns to the normal standby mode.
December 2000 © TOSHIBA TEC 4 - 41 1600/2000/2500 TROUBLESHOOTING