Printer Mechanism Operation
The printer mechanism is a 9-pin serial dot matrix impact mechanism. Figure 2-2 shows a drawing of the mechanism. The name in the rectangles indicate relationship between each mechanism and the control circuit on the PEGX board. Figure 2-2. Printer Mechanism Block Diagram Figure 2-2. Printer Mechanism Block Diagram The printer mechanism is composed of the following The printhead is an electromagnetic induction 9-pin serial dot head. Nine dot wires are driven individually to print a dot pattern...
General Repair Information
This chapter describes the disassembly procedures to be used for replacing any of the main components of the FX-850 1 050. Required and helpful tools, measuring instruments, and lubricants listed in Tables 4-1 through 4-3. o Commercially available product E EPSON exclusive tool O Commercially available product E EPSON exclusive product Figure 4-1 shows some of the parts found on the FX-850 1050. Figure 4-1 shows some of the parts found on the FX-850 1050. DIP Switches Platen Knob Paper Release...
MicroAdjustment TopofForm Set Function
After paper loading is completed, set the printer ON LINE by pressing the ON LINE switch. In this state, the paper loading position can be finely adjusted by operating the LF and FF switches. When the printer is in the micro adjustment mode, the ON LINE LED on the panel blinks. The paper loading position can be adjusted individually for the friction feed, tractor feed, and cut sheet feeder modes, and the adjusted values are stored in the memory. The value for the tractor feed remains valid even...
Appendix
A.1IC A.1.1 CPU LLPD781OHG A.1.2 Gate Array E05A15HA A.1.3 Gate Array E05A16GA A. 1.4 HM27256G-25 EP-ROM A-1 9 A.1.5 HM6264ALSP-12 CMOS ST-RAM A.1.6 NJM2355 A.1.7STK6722H4-Phases Stepper Motor Driver A-24 A.2 EXPLODED DIAGRAMS AND Figure A-1. ptPD7810 781 1 Pin Figure A-2. xPD781 0 781 1 Block Figure A-3. OP Code Fetch Figure A-4. Memory Read Figure A-5. Memory Write Figure A-6. GA E05A15HA Pin Diagram Figure A-7. GA E05A15HA Internal Block Diagram A-8 Figure A-8. GA E05A16GA Pin Diagram 3...
RAM error
The buzzer beeps 6 to 10 times, pausing briefly after every 2 beeps. The beeps warns which RAM is incorrect as follows Beeps 6 times internal CPU Beeps 8 times ST-RAM 5A Beeps 10 times ST-RAM 6A There are three RAMs on the PEGX board, a 256-byte RAM in the CPU and static RAMs IC5A and IC6A. When the printer power is turned on, read write tests of the RAM in the CPU and SRAMIC5A are performed, and a check sum of the IC6A back-up SRAM is calculated and checked. When any of the above four errors...
General Information
The PEGX board includes the various circuits that supply DC voltage, control all of the printer operations and the control panel, and process data from the host computer. Figure 2-8 shows a block diagram of the power supply section. Figure 2-8. Power Supply Block Diagram The power supply circuit is divided into the PEGX board, PEBFIL-II board, and power supply transformer. This circuit converts the AC voltage from the step-down transformer into the DC voltage required to drive the printer...
Epson R230 Left Washer Installer
Figure A-1 1. HM27256G-25 EP-ROM Block Diagram Table A- L.7 HM2.7.2.56-F.P-B0M Signal Status Table A- L.7 HM2.7.2.56-F.P-B0M Signal Status This is a 8K-byte CMOS static RAM which has low power consumption, and its input output level is compatible with the TTL ICs. Capacity of 8192 words X 8 bits amp gt access time . . . 120ns Capacity of 8192 words X 8 bits amp gt access time . . . 120ns 26 CS2 25 A 8 A 9 1 All 22 E 2l A10 Table A-1 3. HM6264ALSP-12 Signal Status Table A-1 3. HM6264ALSP-12...
Gaeaga
Figure 2-36. Carriage Motor Drive Circuit Block Diagram The carriage motor is controlled by the carriage motor constant current drive circuit. The phases of the carriage motor are controlled by CRA - CRD of the gate array IC3A E05A 15GA . Two drive systems, 2-2 phase and 1-2 phase excitation, are used. Because the carriage motor has one driving transistor per winding unipolar drive , two drivers become active in the 2-2 phase excitation system and one and two drivers become active alternately...
Print Control Circuit
The carriage mechanism of the printer is driven by the carriage motor. Reversing the motor rotation, holding, and phase switching for the carriage motor are controlled by the 4-phase stepper motor drive IC IC2A STK6722HZ . This IC IC2A is controlled by a gate array IC3A E05A15HA which is controlled by the CPU. The rotational speed of the carriage motor is controlled by another gate array IC3A E05A16GA . This gate array IC7A also outputs the power-down signal PD 1 that shuts off carriage motor...
Ga Eaha
Figure 2-34. GA E05A15HA Operation Diagram Figure 2-34. GA E05A15HA Operation Diagram This gate array IC7A outputs the carriage speed control signal PCOand PC3 to the 4-phase stepper motor drive IC IC2A STK6722HZ , under the control of the CPU. The carriage speed is controlled by combining the reference voltage for the 4-phase stepper motor drive IC IC2A with PCOand PC3. Figure 2-35 shows the block diagram of the gate array IC7A operation.
Gaeaha
Figure 2-35. GA E05A16GA Operation Diagram Figure 2-35. GA E05A16GA Operation Diagram This gate array also performs another function. When a hardware error except a paper end is detected in the printer, the gate array outputs the power down signal PD 1 to the 4-phase stepper motor drive IC IC2A and shuts off the 36 VDC, so that damage to the circuit can be minimized. .4-phase Stepper Motor Drive IC IC2A STK6722HZ The 4-phase stepper motor drive IC directly drives the carriage motor, under...
Interface Overview
The FX-850 1 050 has 8-bit parallel interface as standard. 1.3.1 8-bit Parallel Interface Specifications Data Transmission Mode Synchronization Handshaking Logic Level By BUSY and ACKNLG either or both TTL compatible See Figure 1-6. 57-30360 AMPHENOL or equivalent See Figure 1-7. NOTE Transmission time rising and falling time of every input signal must be less than 0.2 fis. Figure 1-6. Data Transmission Timing of 8-bit Parallel Interface cigure 1-7. 36-Pin 57-30360 Connector Table 1-17 shows...
LIST OF TABLES Orc
IC List PEGX Transistor iPD7810 Mode fiPD7811PF ftPD7810PF mPD781 0 781 1 Port GA E05A15HA Port Functions GA E05A15HA Control Functions A-1 1 GA E05A16GA Control Functions A-1 7 GA E05A16GA Initialized State A-1 8 HM27256 EP-ROM Signal HM6264ALSP-12 Signal Status STK6722H Terminal Connector CN1 Pin Assignments A-28 Connector CN2 Pin Assignments A-28 Connector CN3 Pin Assignments A-28 Connector CN4 Pin Assignments Connector CN5 Pin Assignments A-28 Connector CN6 Pin Assignments A-28 Connector...
Ga[eaha
Figure 2-44. GA E05A15HA Function for Paper Feed Motor The paper feed motor is controlled by the open-loop constant voltage drive circuit. The phases of the paper feed motor are controlled by PFA-PFD of the gate array IC3A E05A15HA . 2-2 Phase excitation system is used. The paper feed motor has one driving transistor per winding unipolar drive , two driver's become active in the 2-2 phase excitation system. Figure 2-45 shows the 2-2 phase excitation system. Figure 2-45. Phase Excitation System...
Cpumpdhg
Figure 2-50. Printhead Control Circuit Block Diagram Figure 2-50. Printhead Control Circuit Block Diagram Drive Pulse Width Control The width of the printhead drive pulse is controlled by the CPU PD78 10HG . The CPU monitors printhead drive voltage VP 24 V at ANO, kand controls the width of the printhead drive pulse output from PC6 of the CPU by making it longer or shorter according to changes in the drive voltage, so as to keep the drive voltage constant in order to stabilize print quality....
Cable Connections
The printer components are connected to and controlled by the PEGX board. Figure 2-1 shows the interconnection of the components. Print Plunger Home -h od position PE feed Carriage Release motor motor switch Print Plunger Home -h od position PE feed Carriage Release motor motor switch Each component is connected to one of the connectors on the PEGX board, which are listed in Table 2-1. Table 2-1 describes the connectors. Standard 8-bit parallel interface connector. Used for data transfer from...
Plunger Drive Circuit
The gate arrays E05A 15GA 7A and E05A 16HA 3A control this circuit to drive the plunger to open and close the paper holding lever for paper auto loading ejection. Figure 2-47 shows the drive mechanism, Figure 2-48 shows the shows the plunger drive circuit and Figure 2-49 and Table 2-15 shows the on off timing of the transistors during the plunger drive and paper holding. Plunger Distance motion from Stopping Plunger Distance motion from Stopping Figure 249. Relationship Between Transistors and...
List Of Figures
Figure 1-1. Exterior Views of the FX-850 1050 1-1 Figure 1-2. Printhead Pin Configuration Figure 1-3. Cut Sheet Paper Printable Figure 1-4. Fanfold Paper Printable Figure 1-5. Head Adjustment Lever Figure 1-6. Data Transmission Timing of 8-bit Parallel Figure 1-7. 36-pin 57-30360 Figure 1-8. Self-Test Printing Figure 1-9. Hexadecimal Dump Figure 1-10. Paper End Detection Figure 1-11. Component Figure 1-13. Model-3B60 Figure 1-14. PEGX Figure 1-15. PEBFIL-II Board and Power Figure 1-16. Control...
Self Test Operation
The FX-850 1 050 printer has the following self test self printing function which checks the following Printer Mechanism Functions Table 1-23 lists the self test operating instructions and Figure 1-8 shows the self test printing. Press the ON-LINE switch, and turn the power OFF. Turn the power ON while pressing the LINE FEED switch. Turn the power ON while pressing the FORM FEED switch. Default character Shape of zero CG Table Protocol mode Automatic tear-off Country Page Length CSF Mode Skip...