Toshiba e-Studio 270P
Service checks 03
Hot fuser service check
Note: Ensure correct lamp is installed.
| FRU | Action |
|---|---|
| Fuser AC cables LVPS/HVPS Fuser |
Measure the resistance of the thermistor. The resistance measures from approximately 1K ohms immediately after printing or POR to approximately 240K ohms when thermistor reaches room temperature. (It may take 30 minutes to cool.) Replace the fuser assembly as necessary. |
LVPS/HVPS service check
| FRU | Action |
|---|---|
| LVPS/HVPS | LVPS portion of board Fuses that open typically indicate a faulty LVPS/HVPS. Use the voltage meter to verify the appropriate voltage at the printer end of the power cable. Remove the LVPS/HVPS assembly from the printer. Check continuity on the fuses. If either fuse has opened, replace the card. Ensure the switch is off and plug the power cord into the card. Turn the switch on. CAUTION: The card has several points where AC voltage is exposed. Carefully verify the AC voltage between pins 1 and 2 matches the power cable (wall) voltage. • If voltage is incorrect, replace the card assembly. Verify +24 V dc from pin 8 at CN201. • If voltage is incorrect, replace the card assembly. HVPS portion of board Problems with the HVPS are exhibited in the print quality. See “Print quality service checks” for more information. |
Main motor service check
| FRU | Action |
|---|---|
| Main motor cable LVPS/HVPS Controller card Warning: Do not replace the operator panel and controller card at the same time. Each card contains the printer settings. When either of these cards is new, it obtains the settings from the other card. Settings are lost when both are new and replaced at the same time. |
Verify +24 V dc at J9, pin 8 and +5 V dc at pin 1 (controller card). Verify ground at pins 2 and 7 for both the card and cable. • If these voltages are correct, check the main motor cable for continuity. –Remove rear cover to access connector on motor. – If continuity exists on each wire, call next level of service. – If continuity does not exist on one or more of the wires, replace the motor cable. • If these voltages are not correct, see the “LVPS/HVPS service check” or replace the controller card. Note: The main motor is not a service part. |