Control Circuit Operation Overview
The printer CPU is an 8-bit CPU TMP90C041 running at 10 MHz. It oversees control of all the components of the printer. The E05A50 gate array contains various memory management functions that control the assignment of the memory and I O areas. Rationalization and simplification of the circuitry is achieved through use of the STK-6022B, which holds all the driver circuits for driving the PRINTER MECHANISM on a single chip. Figure 2-17 shows the control circuits in block diagram form. I 1...
Appendix
A.I CONNECTOR SUMMARY A.2 CIRCUIT A.4 EXPLODED A.5 CASE OUTLINE Figure A-1. Cable Figure A-2. BOARD ASSY., MAIN C062 MAIN BOARD Circuit diagram Figure A-3. BOARD ASSY., POWER S0PPLY C062 PSB BOARD Circuit Figure A-4. BOARD ASSY., POWER SOPPLY C062 PSB BOARD Circuit Diagram Annotated A-7 Figure A-5. BOARD ASS., POWER SOPPLY C062 PSB BOARD Circuit Figure A-6. BOARD ASSY., POWER SUPLY C062 PSE BOARD Circuit Diagram Annotated A-9 Figure A-7. BOARD ASSY., POWER SUPPLY C062 Figure A-8. BOARD ASSY.,...
C PSBPSE Board Power Supply Circuit Board
The power supply unit consists of a switching regulator circuit, which converts the AC line voltage to the DC voltages for example, 35V and 5V used by the printer. The C062PSB board is 120V input type, and the C062PSE board is 220 240V input type. 1.7.4 Printer Mechanism M-5 E10 M-5E60 The M-5E10 M-5E60 printer mechanism was developed specifically for use with LQ-570 1 070 printer. The components include a carriage motor, carriage mechanism, paper-feed motor, paper-feed mechanism, ribbon-feed...
Overview 1
Problems in the printer may exhibit a variety of symptoms, which can complicate the task of troubleshooting, unless you follow the procedure shown in the flowchart below. Figure 5-1. Troubleshooting Procedure The following tables provide troubleshooting information. Table 5-1. Motor and Printhead Coil Resistance Table 5-1. Motor and Printhead Coil Resistance Coil resistance 19.5 ohms 7 at 25 degrees C 77 degrees F Coil resistance 79.0 5 ohms at 25 degrees C 77 degrees F Coil resistance 45.5 3.2...
o
1 Printer Fails to Operate when Power is On Replace the fuSe and disconnect CN13 on the main board. Measure the output voltage from the Power Supply board. Replace the fuSe and disconnect CN13 on the main board. 3 Printing is Faulty During Self-Test, but Carriage Operation is Normal Set the head LEVER,G, ADJUST to the 2nd position, and perform self-test. Set the head LEVER,G, ADJUST to the 2nd position, and perform self-test. 4 Paper Feeding is Abnormal but Printing is Normal NOTE Perform...
Chapter General Description
1.2 SPECIFICATIONS 1.2.1 Hardware Specifications 1.2.2 Firmware 1.3 INTERFACE 1.3.1 Parallel 1.4 CONTROL 1.5 DIP SWITCHES AND JUMPER SETTING 1.5.1 DIP Switch 1.5.2 Jumper Setting 1.6 OPERATING 1.6.2 Hexadecimal Dump 1.6.3 Paper-out Detection and Forms Override Function 1-21 1.6.4 Error 1.6.5 Buzzer 1.6.6 Printer 1.6.7 Default 1.6.8 Sheet Loading and Sheet 1.6.9 Tear-off 1.6.10 LEVER, G, 1.6.11 printer Protection for Heavy-Duty Printing 1-25 1.7 MAIN 1.7.1 C062 MAIN Board Main Control Circuit...