Toshiba e-STUDIO500P manual Capacity feeder option control board

	FRU	Action
4	High-capacity feeder option	Check the voltage on J8-1 (green). The voltage measures +24 V dc.
	control board	If incorrect, check the autoconnect system for any problems.
		+24 V dc must come from the base printer through the autoconnect
		system to the high-capacity input for the high-capacity feeder to be
		recognized. If the voltage is correct, check the voltages at J11-3(red)
		and J11-4(red). The voltages measure +24 V dc. If correct, replace
		the high-capacity feeder option system board. If incorrect, disconnect
		J8 from the system board and measure the voltages again. If
		incorrect, check the LVPS cable and the AC internal wiring from the
		input appliance receptacle. If incorrect, replace as necessary. If
		correct, replace the LVPS. If the voltages are correct, check the
		stepper motor for shorts from the motor housing to each pin on the
		motor connector. If you find a short between any pin and the motor
		housing, replace the motor assembly. If no shorts are found, replace
		the high-capacity feeder option control board.
		Check the voltage at J9-1 (light blue). The voltage measures
		approximately +24 V dc. If incorrect, disconnect the cable at J9 and
		check the voltage again. If the voltage continues to be incorrect,
		replace the high-capacity feeder option system board. If the voltage
		measures correctly, check the cable. If the cable is damaged, replace
		as necessary. If no problem is found with the cable, replace the high-
		capacity feeder option control board.

24x.xx Paper Jam displays, paper jammed over the pass thru sensor

Where x=the printer displays the value of x for the paper tray where the error occurs. For example: 242.xx is a Paper Jam Tray 2

	FRU	Action
1	Pass thru sensor and flag	The tray x option system board did not detect a piece of paper
	assembly	actuating the pass thru sensor. Remove any jammed sheets of paper
		from the printer and check the pass thru sensor and flag for proper
		operation by running the appropriate Tray Sensor Test from the
		diagnostics menu. If the test fails, check the sensor for correct
		installation and the flag for proper operation. Also check the sensor
		cable to make sure it is correctly connected to the option system
		board. If incorrect, replace the tray x option pass thru sensor
		assembly.
2	Power takeoff shaft and	Check these parts for signs of broken or damaged parts,
	spring, bevel gear, feed roll	contamination on the drive rollers or wear plate and wear or damage
	gear, drive roll assembly,	to the drive shaft bearings. Check the drive roll assembly and skewed
	wear plate, drive shaft	backup roller for wear, slick spots, material buildup, and oil or grease
	bearings, and skewed	on the rollers. Also check for proper operation of the paper aligning
	backup roller	assembly. Repair or replace parts as necessary.

Tray x Paper Low displays when tray x is full or has adequate paper in the tray

	FRU	Action
1	Paper low switch	Run the sensor diagnostics for tray x (x=the number that represents
	Paper low switch cable	the high-capacity input tray). If the test fails, disconnect the paper low
	High-capacity feeder Input	switch cable from J3 on the high-capacity system board. Short pins 1
	system board	and 2 together while observing the sensor test on the display. If the
		display does not change, replace the high-capacity feeder system
		board. If the display changes check the continuity of the switch. If
		incorrect, replace the switch. If correct, replace the switch cable.

2-96Service Manual