Epson DFX 9000
Revision B
Adjustment
Hardware adjustment
224
5.2.3 APTC UNIT mount position adjustment
Summary
This procedure adjusts the backlash between a gear on the APTC Unit
(Gear B) and the SS Gear on the end of the carriage guide shaft (Gear
C). It is required after you remove or replace these parts:
CARRIER UNIT
APTC UNIT
APTC HP UNIT
PJS ROLER ASSY
PJS HOLDER ASSY
Tools / materials: APG Gauge Jig
Objective:
Backlash level = 0.03 ~ 0.07 mm between Gear B and
Gear C
Adjustment Procedure
1. Verify that the reference pin on the side frame is in the positioning
hole of the APTC UNIT. Loosen the two screws that secure the unit,
and push it downward so that Gear B is correctly contacting Gear C.
Lightly tighten the screws to temporarily secure its position.
Figure 5-3. APTC Unit Mount Position Adjustment
C H E C K
P O I N T
It is not mandatory to use the APG Gauge Jig for this
adjustment. If the tool is used, however, the gear backlash
level can be verified as a value on the Dial-Gauge.
Gear backlash: 0.03 ~ 0.07 mm = Dial gauge (APG Gauge
Jig) reading of 0.002 ~ 0.006 mm, or about 1/2 the distance
between two of the smallest (0.01 mm) markings on the
dial.
W A R N I N G
Turn the printer off and disconnect the AC cable before you
perform the following work.
C H E C K
P O I N T
Before performing this adjustment, remove these parts.
Ribbon Cartridge
FRONT COVER ASSY
REAR UNIT
OP UNIT
UPPER UNIT
PRINT HEAD
Positioning hole
Pivot point
Reference Pin
Adjustment
direction
Screw
Gear B
Gear C
(SS Gear)
Screw
APTC UNIT
Summary of Contents for DFX-9000
Page 1: ...EPSONDFX 9000 Serial Impact Dot Matrix Printer SEDM04003 SERVICE MANUAL ...
Page 8: ...C H A P T E R 1 PRODUCT DESCRIPTION ...
Page 61: ...Epson DFX 9000 Revision B Product Description Dimensions and weight 54 ...
Page 62: ...C H A P T E R 2 OPERATING PRINCIPLES ...
Page 99: ...Epson DFX 9000 Revision B Operating Principles Circuit operation 92 ...
Page 100: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 104: ...Epson DFX 9000 Revision B Troubleshooting Overview 97 Mechanism initialization e e e e e ...
Page 107: ...Epson DFX 9000 Revision B Troubleshooting Overview 100 PAPER FEEDING FF APG APPROACH ...
Page 130: ...C H A P T E R 4 DISASSEMBLY AND ASSEMBLY ...
Page 218: ...C H A P T E R 5 ADJUSTMENT ...
Page 263: ...Epson DFX 9000 Revision B Adjustment Additional functions 256 ...
Page 264: ...C H A P T E R 6 MAINTENANCE ...
Page 286: ...C H A P T E R 7 APPENDIX ...
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Page 324: ...EPSON DFX 9000 Revision B Appendix Component Layout 317 7 4 Component Layout ...
Page 333: ...EPSON DFX 9000 Revision B Appendix Parts list 326 ...