Toshiba e-Studio 350P

Fuser service check

When toner is partially fused to the media, it is usually caused by low fuser temperature.
The line voltage to the printer must be within the following limits:
• 100 V ac–127 V ac for the 110 V model printer
• 200 V ac–240 V ac for the 220 V model printer
This printer uses a belt fuser and therefore does not have a lamp.

FRU	Action
Fuser power cable LVPS/HVPS Fuser	Unplug the printer, and disconnect the fuser cable plug from the LVPS/HVPS board connector at PCN5. Check for continuity across the fuser by checking across the connector pins. • If there is continuity, check the LVPS/HVPS. See “LVPS/HVPS service check”. • If there is no continuity, disconnect the fuser power cable at both ends and check each conductor for continuity. Replace cable if necessary. • If the cable tests good, replace the fuser. Make sure the fuser thermistor is correctly connected to the controller board at J13. If the problem persists, disconnect the thermistor cable and check for less than +5 V dc on pin 1. Pin 2 should be ground. If line voltage is incorrect on pin 1, see “Controller card service check” for more information.
Fuser	Disconnect the thermistor cable from J13 on the controller card. Measure the resistance across the ends of the thermistor cable. Replace the fuser assembly if the resistance is lower than 1K ohm or shorted. Note: Resistance measures approximately 400K ohms when cool and 1K ohms hot.

LVPS/HVPS service check

FRU

Action

LVPS/HVPS

LVPS portion of board Fuses that open typically indicate a faulty LVPS/HVPS. Disconnect the power cable, and open the LVPS/HVPS enough to test the switch. The switch will show continuity across the conductors with a meter when the switch is on. If the switch is good, see "Dead machine service check" for more diagnostics. 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 gear drive 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.

Turn off the printer, and unplug the main motor cable at J17. Turn on the printer, and check for the following voltages at J17: Pins 1–4 Approx. +3.3 V dc Pin 6 Approx. +5 V dc Pins 7–9 10 V dc–24 V dc Verify ground at pin 5 for both the card and cable. • If these voltages are correct, check the main motor cable for continuity. - Remove the left side cover to access the connector on the motor. - If continuity exists on each wire, replace the main gear drive which includes the motor. - If continuity does not exist on one or more of the wires, replace the motor cable. • If these voltages are not correct, see “Controller card connector pin values” , or replace the controller card. See “Controller card removal” .