List Fo Tables
Troubleshooting Tools Off-Line Unit Parts Symptom and Reference Pages Power Supply Circuit Parts List Power Supply Circuit Unit Repair Control Circuit Parts List Electric Device Because various types of trouble can occur, troubleshooting is not easy to perform. Here, a simple procedure is provided to perform troubleshooting, as shown in Figure 5-1. Foult check using the diagnostic tool Figure 5-1. Troubleshooting Procedure Table 5-1 lists the troubleshooting tools contained in the printer. Use...
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...
Gaeaga
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...
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
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...
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...
