Printer Mechanism Adjustments; Pg Motor Backlash Adjustment - Epson C117001-N - DFX 5000+ B/W Dot-matrix Printer Service Manual

4.1 PRINTER MECHANISM ADJUSTMENTS

This section describes the printer mechanism adjustments for the
is disassembled and the printer parts mentioned in this section are replaced or repaired, perform
the appropriate adjustments to ensure proper printer operation. Perform adjustments before
assembling the printer.

4.1.1 PG Motor Backlash Adjustment

the PG motor backlash adjustment, the PG motor
In
carriage guide shaft gear cog. If the pinion gear is poorly aligned or the pinion gear and cog are too
tight, printer operation is noisy or the character density is incorrect.
Loosen the 2 screws securing the PG motor to the left side frame. (Refer to Section 3.2.7.4)
1.
2. Make sure the PG motor pinion gear is properly aligned with the carriage guide shaft gear cog.
Move the PG motor until there is 0.05 to 0.15 mm (0.002 to 0.01 inches) between the PG motor
pinion gear and carriage guide shaft gear cog. Then tighten the 2 screws.
Figure 4-1. Platen Gap Motor Backrash Adjustment
Rev. D
mesh smoothly with the
pinion gear must
Adjustments
4-1