Epson C117001-N Product Support Bulletin(s)

EPSON AMERICA, INC.

Subject: DFX-5000 paper loading problems.

Date: 01/04/94

Page(s): 1 of 2

PSB No: P-0102

Originator: SEK

The purpose of this bulletin is to resolve a problem with the DFX-5000 printers that

constantly or intermittently perform a load and eject cycle or fail to load paper

completely.

The initial and final platen gap values cannot be determined as read from the platen

2. Explanation:

There are two possible solutions to this problem. The fix that has been used in the past

with moderate success is to gap the platen gap motor with a thin strip of regular copy

paper. The platen gap motor (PGM) was set for zero backlash from the factory, and as

the unit ages, it is increasingly difficult for the carriage guide shaft (CGS) to rotate and

find the initial and final platen gap (PG) values. The printer would load and eject paper

constantly and on rare occasion, the paper would stay loaded.

If the PGM backlash adjustment does not cure the problem, there are two friction

clutches that keep the CGS from rotating while printing. On older units, or units used in

harsher environments, the lubricant on the friction plates will dry out or get

contaminated causing sluggish response of the CGS. The CGS will seem like it is

harder to turn than other printers, although the amount is very slight and is difficult to

3. Resolution:

On each side of the CGS there is a friction clutch (Figure 1, Reference 561, 562, 563

and 614). These clutch plates must be removed, cleaned, lubricated and reinstalled.

This is the procedure:

Remove the interlock switch before lifting the mechanism out.

Remove the four screws that hold the mechanism in the printer, all cables and

ground straps.

Remove the junction board, the PG sensor and the PG motor.

Remove the E ring that holds the CGS gear and the other small gear.

Remove the E ring (563) and spring (614) that attaches the “Guide shaft holding

lever” or clutch plate.