Dell 2330dn service manual Service checks, Controller board service check, Post Power-On Self Test

Service checks

Service checks which involve measuring voltages on the LVPS/HVPS (low voltage power supply/ high voltage power supply board) should be performed with the printer positioned on its back side.

Note: When making voltage readings, always use frame ground unless another ground is specified. See the wiring diagram in the back of the book for more information.

Controller board service check

Controller board service check

FRU	Action
Controller board	POST (Power-On Self Test)
assembly	Note: The printer should complete POST in approximately 30 seconds.
Warning: Do not
	If the printer fails to display lights or activate the drive motor, fuser, or fan, then check the
replace the operator
	following in order:
panel and controller
board at the same	1. Power to the LVPS/HVPS
time. Each card	Turn the printer on and listen carefully for a click near the switch. A clicking sound
contains the printer
	verifies that the outlet and power cables are good. Absence of a clicking sound may
settings. When either
	indicate a lack of power supplied to the LVPS/HVPS.
of these cards is new,
	2. Power from the LVPS/HVPS to the controller board
it obtains some of the
	With the power on, check the LED below the right lower corner of the fan. If the LED
settings from the other
card. Settings are lost	lights up, it indicates that power is supplied to the controller board. If the LED does not
when both are new	light up, proceed to the next check item.
and replaced at the	3. Cables correctly plugged, especially for the operator panel
same time.	The printer will not power-up without a functioning operator panel even with a lighted
	LED on the controller board.
	4. The controller board assembly
	The LED adjacent to J12 will be illuminated if the card is powered and good.
	5. The operator panel
	See “Operator panel service check” on page 2-27.

Verify +24 V dc input from the LVPS/HVPS.

1.Turn the printer off.

2.Disconnect the LVPS/HVPS cable from the controller board at J502.

3.Turn the printer on.

4.Verify +24 V dc on positions 6, 17, and 19 of the cable connector (LVPS/HVPS). If there is no voltage supplied on any of these positions, turn the printer off and go to step 7.

5.Verify +5 V dc on positions 1, 3, 4, 5, 11, 13 and 15 of the cable connector (LVPS/ HVPS). If there is no voltage supplied on any of these positions, turn the printer off and go to step 7.

6.Turn the printer off. Check the continuity of the conductors of the cable and the card connector with respect to ground. Verify that pins 10, 12, 14, 16 and 18 on the cable are grounded. Verify the same pins on the card connector side are grounded too. If there is no continuity on any of the card pins, verify that all the mounting screws are tight. If there is still no connection to ground then replace the controller board. See “Controller board removal” on page 3-6.

7.Open the LVPS/HVPS and disconnect the controller board-to-LVPS/HVPS cable at CN201.Verify continuity in each conductor of the cable. This cable is not a replaceable part. If continuity is still not good then go to “Dead machine service check” on page 3-24.

Controller board voltage outputs

Turn the printer off, and plug the LVPS/HVPS cable into J502 of the controller board. See the wiring diagram at the end of the manual which identifies the output voltages and grounds for a good controller board.

Turn the printer off before plugging or unplugging any connectors.

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