Chapter Maintenance

6.1 PREVENTIVE 6.2 LUBRICATION AND ADHESIVE Figure 6-1. Correct Adhesive Figure 6-2. DFX-8000 Lubrication and Adhesive Diagram 1 6-4 Figure 6-3. DFX-8000 Lubrication and Adhesive Diagram 2 6-5 Figure 6-4. DFX-8000 Lubrication and Adhesive Diagram 3 6-6 Table 6-1. Lubricants and Table 6-2. Lubrication Table 6-3. Adhesive Application Proper maintenance is essential to maintain optimal printer performance for the longest possibly period and to minimize malfunction frequency. Preventive maintenance...

Printhead Control Drive Circuit

Figure 2-27 shows a block diagram of the printhead control drive circuit. The number of head coils is 18 9 X 2 rows . The drive circuit is a constant current coil drive circuit. Each coil is driven by two transistors PNP and NPN . The PNP supplies common currents VP 1 and VP2 and the NPN connects and disconnects grounds GP 1 and GP2, and they drive the coil with different timing. This is to increase the response speed of the head pin by driving the coil T after the PNP transistor is turned off....

Platen Gap Adjustment Mechanism

Epson Sensor Measurement

The printer mechanism has an automatic platen gap adjustment function that ensures an optimum gap between the platen and printhead by measuring the thickness of the paper. Figure 2-4 shows the platen gap adjustment mechanism. The carriage guide shaft supporting the front of the carriage has an elliptical section. The rotation of the platen gap motor is transmitted to the carriage guide shaft through the gears. Counterclockwise CCW rotation of the motor expands the platen gap and clockwise CW...

Carriage Motor Control Drive Circuit

Epson Encoder

Figure 2-26 shows a block diagram of the carriage motor control drive circuit. The carriage motor is a DC servo motor driven using bipolar drive, and can operate in any of the following modes. a. Forward rotation RUN mode Driven state. The carriage moves from left to right. b. Forward rotation BRAKE mode Non-driven state. The carriage is slowed down. c. Reverse rotation RUN mode Driven state. The carriage moves from right to left. d. Reverse rotation BRAKE mode Non-driven state. The cariage is...

Figure Forms Over Ride Area

Clean paper with no folds, creases, or tears, especially for the copying paper should be used. Figure 1-3 shows paper that is unsuitable. 4. Forms-override printing is available 20 lines after paper end. The paper feeding pitch is not guaranteed. The end of printable area is 15mm from the bottom edge of paper. 5. Weak horizontal and vertical perforations cause paper jams. 6. The pitch of perforations pitch of the cut part and uncut part ratio . 7. Perforations must have an uncut part on each...

Laaiipsjxuai b

Solenoide Dfx 8000

Refer to section 3.2.4. 1. Step 2 Remove the cable running from connector CN4 at the main board. Step 3 Remove the two CBB M3X 12 screws and the two CBS 0 M3 X 8 screws fixing the main board to the base plate, and remove the main board. The following adjustments are required when the main board is Replaced Printhead Adjustment Value Writing See section 4.2 Bi-directional Printing Adjustment See section 4.3 Step 1 Remove the bottom panel. Refer to section...

Operator Control

This section discusses the operating controls. 1.3.1 Control Panel The control panel is equipped with 7 indicators, 8 switches and a buzzer. Here, we will discuss the functions of the control panel indicators and switches. Figure 1-27 shows the control panel. The functions of the control panel switches are as follows a. ON LINE Switches the printer on or off line. b. FORM FEED This mode has the following 2 functions Functions as an AUTO LOAD switch. If the paper is loaded in the tractor unit...

Major Units

Dot Matrix Printer Carriage Unit

The DFX-8000 consists of the following major units BOPS board AC 120V version BOPSE board AC 220 240V version board board The Model-3C65 is a 9 pin 2 lows Total 18 pin serial dot matrix printer mechanism developed for the This design places emphasis on high speed printing and endurance, and is a heavy duty design when compared with existing terminal printer mechanisms. Its paper feeding mechanism is designed to use fan-fold paper and an automatic mechanism is equipped to enhance paper handling....

Disassembly And Assembly

Dfx 8500 Input Power Switch Terminal

Carefully read the cautions in the preceding section 3. 1 BEFORE STARTING, and follow the instructions. Here we will describe how to assemble and disassemble the printer, by referring to the disassembly sequence. The sequence for assembly is basically the reverse of that for disassembly, and any point that demands special attention is described as an ASSEMBLY POINT. We will also omit simple disassembly operations please refer to the exploded diagram for details. In addition, lt ADJUSTMENT...

Chapter Adjustment

Epson Stylus 870 Load Eject

4.1 ADJUSTMENT 4.2 PRINTHEAD ADJUSTMENT VALUE 4.3 61-DIRECTIONAL PRINTING 4.4 PARALLELISM 4.5 TIMING BELT TENSION 4.6 MECHANISM ADJUSTMENT VALUE MEASUREMENT...........4-11 Figure 4-1. Entering the Adjustment Figure 4-2. Writing the Adjustment Figure 4-3. BETA Figure 4-4. Bi-directional Printing Figure 4-5. Printing Figure 4-6. Parallelism Adjustment Figure 4-7. Dial Gauge and Dial Gauge Base Attachment...........4-9 Figure 4-8. Carriage Guide Shaft Pralleiism Adjustment.............4-9 Figure...