REV.-A
PRINCIPLES OF OPERATION
2.2.5 +24 VDC VOLTAGE CONTROL CIRCUIT
Figure 2-22 shows the + 24 VDC voltage control circuit. To maintain the correct voltage on the + 24 V line,
the main switching transistor goes off if the voltage exceeds 24 V. If excess voltage occurs, reverse current
flows through Zener diode ZD20, PC1 is activated, and the condition of the switching circuit is as shown
in Figure 2-23.
r
D4
C10
0.01
R8
ON
+24V DC
GND
NOTE:
Items in parentheses refer to the 220/240 V version.
Figure 2-22. +24 VDC Voltage Control Circuit
LQ-510
2-19
Summary of Contents for AP-4000
Page 1: ...LQ 510 AP 4000 T E C H N I C A L M A N U A L EPSON ...
Page 4: ...REV A REVISION SHEET iv LQ 510 ...
Page 103: ...REV A PRINCIPLES OF OPERATION LQ 510 Figure 2 68 A D Converter Circuit 2 61 ...
Page 125: ...OPTIONAL EQUIPMENT REV A 3 16 Figure 3 12 Lubrication Points 2 LQ 510 ...
Page 167: ......
Page 192: ...MAINTENANCE REV A L __ w w n Figure 6 3 LQ 510 Lubrication Points 6 3 LQ 510 ...
Page 202: ...APPENDIX REV A Table A 6 E01A05 Pin Functions A 8 LQ 510 ...
Page 212: ...3 L CN 1 ...
Page 213: ...REV A APPENDIX Figure A 25 SANPSE Board Component Layout LQ 510 A 19 ...
Page 214: ...REV A APPENDIX J Figure A 26 SANPSE Board Circuit Diagram A 20 LQ 510 ...
Page 215: ...REV A APPENDIX Figure A 27 SANPNL W Board Circuit Diagram LQ 510 A 21 ...
Page 216: ... w 3 0 4 CN1 14 18 22 I IP I9 3 1 2LSl39 2 6 8 2 4 9 TOM4 BOARD Y 4 5 4 2 0 9 0 0 0 0 0 ...
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Page 221: ...REV A APPENDIX 506 Figure 14 32 Model 5710 Printer Mechanism Exploded Diagram A 29 ...
Page 222: ...APPENDIX REV A Figure A 33 C80006 Pull Tractor Exploded Diagram A 30 LQ 510 ...
Page 223: ... Y ...
Page 224: ...APPENDIX REV Figure A 35 LQ 510 Printer Cover A Case Outline Drawing A 32 LQ 510 ...
Page 225: ...APPENDIX REV A J 2 7 J Bl Figure A 36 LQ 510 Printer Cover B Case Outline Drawing LQ 510 A 33 ...
