Citizen Systems CBM-710/720 service manual Parallel Interface Circuit

Page 17

CBM-710/720 Service Manual

Vcc

R15 33k

IC1 50734SP

IC10

7406

IC137406

	33kΩ
RA5	12-
CN3	16P
CN2

Fig. 7-2. Parallel Interface Circuit

15

Image 17

Contents DOT Matrix Printer Contents Chapter Printer Disassebly and Assembly How to the Upper Cover and Rear Cover How to Remove the Control Board How to Remove the Printer MechanismHow to Remove the Power Board and AC Power Unit How to Remove the Operation Panel Board and PE Sensor Board How to Remove the Auto Cutter UnitChapter Circuit Description Outline Block DiagramCPU and ROM/RAM Circuit CPU Peripheral CircuitsPower Failure Interrupt Circuit and Initial Resetting Printer Control Circuit Printer Control CircuitNormal Reverse Stop Cutter Control CircuitOperation Panel Circuit Interface with Operation PanelPaper End Sensor Circuit Paper End Sensor CircuitSTB Parallel Interface CircuitParallel Interface Circuit Serial Interface Circuit Serial Interface Circuit Diagram RS422A Interface Circuit RS422A Interface CircuitPower Supply Circuit Power CircuitChapter Auto Cutter Maintenance and Handling Mechanism and Principle of Operation Cam Switch Cutter Gear Repairing Troubleshooting Page Disassembly/Assembly Page Chapter Circuit Diagram Power Supply Circuit Diagram CBM710/720-001-00 Noise Filter Circuit Diagram CBM710/720-002-00 Paper End Sensor Circuit Diagram CBM710/720-004-00 Circuit Diagram Parallel Circuit Diagram RS232C CBM710/720-008-00 Chapter Parts List Exploded View CBM-710/720 Parts ListRef. No Parts No Description CBM-710,720 CBM-710 CBM-72037 Block Diagram CBM-710/720 Block Diagram Power Supply Unit CBM-710/720 PC Board Noise Filter Unit CBM-710/720 Parts Position Noise Filter Unit Control Board Assy RS232C CBM-710/720 Parts List Control Board Assy RS232C OSC Parts Position Control Board Unit RS232C Control Board Assy Parallel CBM-710/720 Parts List Control Board Assy Parallel Parts List Control Board Assy Parallel Parts Position Control Board Unit Parallel Control Board Assy RS422A CBM-710/720 Parts List Control Board Assy RS422A OSC Parts Position Control Board Unit RS422A Operation Panel Unit Parts Position Operation Panel Unit Parts Position PE Detector Unit OP Junction Block AC-2 AC-3 Auto Cutter AC-2/AC-3AC-2 AC-3 Winder AW-2 AW-2