Toshiba e-STUDIO500P manual Voltage on CN2-1 on the LVPS. The voltage should measure

	FRU	Action
3	+5 V dc test point on the	Check for approximately +5 V dc at the +5 V test point on the system
	system board	board.
		Note: Use care not to short adjacent voltage test points.

		If the voltage is correct, replace the system board assembly. If the
		voltage is incorrect, go to step 4.
4	System board	Check to make sure the LVPS cable is correctly installed at J27 on
		the system board. If not, reseat and recheck the voltage at the
		+5 V dc test point on the system board.
		If test point does not measure +5 V dc, go to step 5.
5	LVPS	Unplug the AC line cord from the LVPS and disconnect the LVPS
		cable to the system board. Reconnect the AC line cord and measure
		the voltage on CN2-1 on the LVPS. The voltage should measure
		approximately +5 V dc.

If the voltage is correct, go to step 6. If the voltage is incorrect, replace the LVPS assembly. See “Low voltage power supply removal” on page 4-54

6Features or option installed Warning: Observe all the ESD precautions and turn the printer off

	on the interconnect card	before any feature or option cards are removed or replaced.
	assembly	Remove one option/feature at a time to help isolate the failing part.
		Replace the faulty part.
7	LVPS fuse F1 (primary	Unplug the AC line cord, remove the LVPS from the printer, and
	power)	check the continuity of fuse F1. See “Low voltage power supply
		removal” on page 4-54.
		If continuity is correct, replace the LVPS assembly.
		If the voltage is incorrect, replace the LVPS assembly.
8	Loads connected to the	Turn the printer off and disconnect each cable connected to the
	system board	system board and each option installed on the system board until the
		problem is located.
		Warning: When removing any card installed on the system board
		observe all ESD precautions when handling these options.

Diagnostic information 2-81