Epson DFX-8500 service manual Printing is normal, but paper feeding is abnormal

DFX-8500

4. Printing is normal, but paper feeding is abnormal.

START
Is the	No
paper loaded
correctly?
Yes	Load the paper correctly.

When	No
you move the PF			Refer to Section 5.3		Repair of the
motor manually, does it			Printer Mechanism.
move smoothly?
Yes
				Is PF	Yes
Check the resistance of the PF motor				motor coil
				resistance
coils and check the PF motor drivers.
				correct?
				No			Are the
						drivers shorted or
Is the		No					open?
				Are the
motor resistance OK								Yes
and are the drivers				drivers shorted or		No
OK?				open?
Yes				Yes
				Replace the					Replace the
						Replace the
Refer to Section 5.5, Repair of the									C204 MAIN board and/or
				C204 DRV board
						PF motor.			C204 DRV board.
Printer Mechanism.				and the PF motor.

Perform final printing of self-test.

			Perform final printing of self-test.
		No
Is the				Is the			Yes
print OK?
				print OK?
					No		END
END				Refer to Section 5.3 Repair
	Refer to Chapter 4
				of the Printer Mechanism.
	and perform the PG
	motor backlash
	adjustment.						No
				Is the
				print OK?
		END
						Refer to Chapter 4 and perform
						the PG motor backlash
				END
						adjustment.

END

5-10 Rev. B