2.2.1.1 Main Motor Mechanism and Control
The main motor, which is located in the driving unit, transmits drive force to the rollers in the
printer. A main motor malfunction is detected if any of following conditions is detected:
1.
The lock signal (CN5-1) goes OFF (LOW), and the OFF status continues for 1 second or
more.
2.
The lock signal (CN5-1) does not go OFF (LOW) within 1 second after the main motor
goes ON (CN5-2=Low).
Figure 2-10 shows the main motor (M1) drive circuit.
2.2.1.2 Laser Unit Control
The laser unit, which consists of the laser diode unit and the polygon mirror, exposes the PC drum.
The output level of laser is adjusted prior to the printing, and a laser error occurs if the adjustment
fails.
If any of following conditions in the polygon motor is detected, the polygon motor is regarded as
malfunctioning.
1.
The polygon motor lock signal does not go ON within 10 seconds after the polygon
motor goes ON.
2.
The polygon motor lock signal goes ON after the polygon motor is energized, but it goes
OFF again and does not come back ON within 1 second or more.
3.
The SOS signal is not detected during printing.
MOTOR LOCK
MOTOR ON/OFF
+24V
GND
CN5
1
2
3
4
Main Motor
PWB-A Board
Figure 2-10. Main Motor Drive Circuit
1
7
8
12
PWB-A Board
P/H (Print Head) Unit
PWB-D
Laser Diode Board
Polygon Motor
SSCAN
+5 V
+24 V
POLYGON-LOCK
M 2
CN2
Figure 2-11. Laser Control
EPL-N2000 Service Manual
Operating Principles
Rev.A
2-11
Summary of Contents for EPL-N2000
Page 1: ...EPSON TERMINAL PRINTER EPL N2000 SERVICE MANUAL EPSON 4006861 ...
Page 8: ...REVISION SHEET Revision Rev A Issued Date November 17 1996 Revision P a g e 1st issued ...
Page 131: ...Chapter 4 Adjustment No adjustment is required in this product ...
Page 133: ...Troubleshooting EPL N2000 Service Manual 5 2 Rev A ...
Page 167: ...A 2 Exploded Diagrams Figure A 2 Housing Appendix EPL N2000 Service Manual A 18 Rev A ...
Page 168: ...Figure A 3 Frames EPL N2000 Service Manual Appendix Rev A A 19 ...
Page 169: ...Fifure A 4 Paper Takeup Section 1 Appendix EPL N2000 Service Manual A 20 Rev A ...
Page 170: ...Figure A 5 Paper Takeup Section 2 EPL N2000 Service Manual Appendix Rev A A 21 ...
Page 171: ...Figure A 6 Drive Unit Appendix EPL N2000 Service Manual A 22 Rev A ...
Page 172: ...Fifure A 7 Transfer Unit EPL N2000 Service Manual Appendix Rev A A 23 ...
Page 173: ...Figure A 8 Fusing Unit Appendix EPL N2000 Service Manual A 24 Rev A ...
Page 174: ...Figure A 9 Paper Cassette Unit EPL N2000 Service Manual Appendix Rev A A 25 ...
Page 175: ...Figure A 10 Lower Paper Cassette Standard Appendix EPL N2000 Service Manual A 26 Rev A ...
Page 176: ...Figure A 11 Lower Paper Cassette Optional EPL N2000 Service Manual Appendix Rev A A 27 ...
Page 177: ...Figure A 12 Optional Duplex Unit Appendix EPL N2000 Service Manual A 28 Rev A ...
Page 188: ...EPSON ...