Adjustment; Print Speed Adjustment - Sharp DP-750 Service Manual

(69) Install the 2-station housing cover on the PF housing
assembly and fasten with fastening screws (M3x8).
Fastening screw
2-station
housing cover
PF housing
assembly
(70) Install the ribbon cassette.

3-4 Adjustment

Fastening
screw

3-4-1 Print Speed Adjustment

(1) Procedure
RP
Ribbon cassette
(2) Check points
Note
23
There are six adjustment items for this printer, as
listed below. Perform the adjustments in the listed
order.
(1) Print speed adjustment
(2) Platen/head gap adjustment
(3) Bidirectional printing shift adjustment
(4) Reset pulse (RP)/home position (HP)
waveform check
Perform the bi-directional printing and use an
oscilloscope to measure cycle A of the reset pulse
(RP).
A
RP waveform: Connector pin 26
GND: Connector pin 24
Perform the adjustment under the
following conditions.
• Ribbon cassette:
• Printer paper:
• Motor drive voltage:
• Ambient temperature:
• Printing mode:
Loaded
Loaded
24V
Normal room
temperature
Continuous
printing