Lexmark 4026-0XX manual Post Incomplete - ERROR LED remains on solid, Diagnostic Information

4026-0XX

	FRU	Action
5	ROM SIMM	Reinstall the ROM SIMM. Check for +5 V dc at
	and Optional	CN7-4. If incorrect, replace the ROM SIMM.
	Memory
	SIMM	Reinstall the optional memory SIMM if one was
		installed. Check for +5 V dc at CN7-4. If incor-
		rect, replace the optional memory SIMM.
6	HVPS	Reconnect CN4 and check for +5 V dc at CN7-
		4. If incorrect, replace the HVPS.
7	Printhead	Reconnect CN5 and CN10. Check for +5 V dc at
	Assembly	CN7-4. If incorrect, replace the printhead
		assembly.
8	Thermistor	Reconnect CN2 and check for +5 V dc at CN7-
		4. If incorrect, replace the thermistor/cable
		assembly.

Post Incomplete - ERROR LED remains on solid

Note: Be sure the top cover is closed when doing the following checks.

	FRU	Action
1	LVPS	Disconnect the LVPS cable from the engine
		board. The voltage measures approximately +24
		V dc between pin 1 (+24 V dc) and pin 2 (+24 V
		dc ground). If incorrect, replace the LVPS.
2	Engine Board	Reconnect the LVPS cable and measure the
		voltage on CN7-1. The reading should measure
		approximately +24 V dc. If incorrect, disconnect
		CN3, CN4, CN6, CN9, CN10 and CN11 from the
		engine board. The voltage on CN7-1 measures
		+24 V dc. If incorrect, replace the engine board.
		If correct, reconnect one cable at a time check-
		ing the voltage at CN7-1 until the FRU causing
		the problem is found. Replace the failing FRU.
		If the CN3 or CN9 are causing the problem, it is
		necessary to disconnect each solenoid and
		check the voltage at CN7-1. Replace the failing
		FRU.

Diagnostic Information 2-23