Toshiba e-Studio 350P
Service checks 02
Cooling fan service check
| FRU | Action |
|---|---|
| Cooling fan | Make sure the fan cable plug is properly seated at J4 (controller card). Turn the printer off, and disconnect the cooling fan cable from the controller card. Turn the printer on. Within a few seconds, the controller card assembly should apply +24 V dc to pin 2. • If voltage is present and the fan is not turning, replace the cooling fan. If the fan still doesn’t function, replace the controller card. • If voltage is not present, check the controller card. |
Cover interlock switch service check
Note:
Make sure a print cartridge assembly is installed and the cover closes all the way, engaging the cover open switch lever.
| FRU | Action |
|---|---|
| Cover interlock switch | Disconnect the cover interlock cable from the controller card at J6. With the printer turned off, verify continuity between cable pin 1 and pin 2 with the door closed and discontinuity with the door open. Verify continuity between cable pin 1 and pin 3 with the door open and discontinuity with the door closed. Verify discontinuity between cable pins 2 and 3 whether the door is open or closed. • If either fails, replace the cover interlock switch. • If both pass continuity, turn the printer on, and measure +5 V dc on pin 2 at J6 on the controller card. • Verify pin 3 at J6 is ground. • If voltage or ground is not present, see “Controller card service check” for more information. |
Dead machine service check
CAUTION:
Check the AC line voltage. The voltage should be within the following limits:
• 100 V ac (volts alternating current) – 127 V ac for the 110 V printer
• 200 V ac – 240 V ac for the 220 V printer
| FRU | Action |
|---|---|
| LVPS/HVPS | Unplug the printer. Remove the LVPS/HVPS, and check the fuses for continuity. • If open, replace the LVPS/HVPS. • If not open, check the switch continuity across its conductors with the switch on. Turn the switch off. Plug the AC line into the LVPS/HVPS and switch unit on. Note: Voltages may be exposed at several places on the board. Do these verifications, and then unplug the card: • Verify 24 V dc on pins 8, 9, and 10 at PCN1. • Verify approximately 3V on pins 1–3. • Verify approximately 5V on pins 4 and 13. • If voltages are not correct, replace the LVPS/HVPS. • If voltages are correct, check the controller card. |