Toshiba e-STUDIO500P manual Operator panel service check, One or more operator panel buttons fail

Operator panel service check

Note: The operator panel board is a separate FRU and is also part of the upper front cover FRU

Warning: When replacing any one of the following components:

•Operator panel assembly (or upper front cover)

•System board assembly

•Interconnect card assembly

Only replace one component at a time. Replace the required component and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two or more of the components listed above without a POR after installing each one or the printer will be rendered inoperable.

Warning: Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a printer, it can not be used in another printer. It must be returned to the manufacturer.

Before continuing with this service check perform the “Button Test” on page 3-7.

One or more operator panel buttons fail

	FRU	Action
1	Operator panel buttons kit	If any button fails the Button Test, check the failing button or buttons
	Operator panel board	and associated parts. Repair using the button kit. See “Operator
		panel buttons removal” on page 4-67. If the problem remains,
		replace the operator panel board (see “Operator panel board
		removal” on page 4-66. If a 950.xx error code is displayed after
		replacing the operator panel, go to “950.00 through 950.29 EPROM
		mismatch failure” on page 2-77.
2	System board	Disconnect the operator panel cable from J13 on the system board
	Operator panel board	and measure the voltage at J13-5. The voltage should measure
		approximately +3.3 V dc. If incorrect, replace the system board. See
	Upper front cover hinge
		“System board and inner shield removal” on page 4-76. If
	assembly	correct, replace the operator panel board. See “Operator panel
		board removal” on page 4-66. If this does not fix the problem,
		check the operator panel cable. If a problem is found, replace the
		upper front cover hinge assembly. See “Upper front cover hinge
		assembly removal” on page 4-78.
No buttons work
	FRU	Action
1	Operator panel board	If none of the buttons work, replace the operator panel board (see
		“Operator panel board removal” on page 4-66. If a 950.xx error
		code is displayed after replacing the operator panel, go to “950.00
		through 950.29 EPROM mismatch failure” on page 2-77.

2-106Service Manual