Figure 1-7. Self Test

Demonstration
To start the demonstration, turn on the printer while holding down the LINE FEED and ON LINE buttons.
THE EPSON LQ-200 The Epson LQ-200 is the affordable, versatile, narrow carriage 24pin dot matrix printer for home and small business combining excellent high resolution printing, convenient paper handling, and a new standard for economical printing.
LOOK AT WHAT THE LQ-200 CAN

DO FOR YOU!

Outstanding 24-pin print quality m Sharp180 x 360 DPI graphics.

w 192 CPS draft print

- 1.0 Drint

+ional cut sheet feeder

;mitaA.-
Figure 1-8. Demonstration
Hexadecimal Dump Function
You use the hexadecimal dump function to check the data the printer is receiving from the host. To turn on hexadecimal dump mode, turn on the printer while holding down the LINE FEED and FORM FEED buttons. In hexadecimal dump mode, the printer prints the hexadecimal representation of the input data and the corresponding ASCII characters. If input data is a control code instead of a character code, the printer prints a period (.) in the ASCII column.
Figure 1-9. Hexadecimal Dump

Bit Image Printing

The LQ-200/AP3000 has four standard print densities. They are listed below in dots per inch (dpi), including half dots. 120 dpi at triple speed 180 dpi at double speed 240 dpi at one and a half speed 360 dpi at normal speed Tables 1-16 and 1-17 show how the firmware handles the print densities.
Table 1-16. Print Density
Table 1-17. Bit Image Printing

Error Conditions

If any of the following error conditions occurs, the printer goes off line. The printer cannot detect the home position at printer mechanism initialization. The printer detects the home position during printing. You press the ON LINE button when the printer is on line, and the printer goes off line. The printer detects a paper-out signal and form over-ride is finished. A paper-out signal is detected after the printer performs a paper-loading operation with the cut sheet feeder enabled. The printer outputs the following interface signals to indicate the error and halt data transmission: The BUSY signal becomes HIGH. The -ERROR signal becomes LOW. The printer does not send an -ACKNLG pulse.

Buzzer Operation

The buzzer rings when any of the following occurs:
The printer receives the BEL code (0.5 second ring). The printer detects a paper-out error (three 0.1 second rings with 0.1 second intervals). The printer detects abnormal carriage movement (five 0.6 second rings with 0.5 second intervals). The printer accepts a control panel setting (0.1 second ring).

Printer Initialization

There are two initialization methods: hardware initialization and software initialization. Hardware initialization Hardware initialization takes place when you turn on the printer (and the AC power cord is plugged in) or when the printer receives the -1NIT signal. During hardware initialization, the printer: 0
Initializes the printer mechanism. Clears the input data buffer. Clears the downloaded character set. Clears the print buffer. Returns its settings to the default values described on the next page.
Software initialization Software initialization takes place when the printer receives the software initialization code. During software initialization, the printer:
Clears the print buffer. Returns its settings to the default values described on the next page.

Default Values

When the printer is initialized, the following default values take effect: Page Position Left and Right Margins Line Spacing Vertical Tabs Horizontal Tabs VFU Channel The current paper position becomes the top-of-form position. Released l/6 inch Cleared Every 8 characters (relative) Channel 0 SelecType setting (software initialtiation) DIP switch setting (hardware initialization) Deselected (software initialization) Cleared (hardware initialization) Left justification 10 cpi ESCK=ESC*O,ESCL=ESC*l ESCY=ESC*2,ESCZ=ESC*3 Clears all effects except for condensed printing. DIP switch setting

Typestyle

User-Defined Characters Justification Character Spacing Bit Image Mode Assignment Printing Effects Condensed Printing

LQ-2OOIAP3000

Head Adjust Lever
You must move the head adjust lever to the position appropriate for your papers thickness. See Table 1-18 and Figure 1-10.
Table 1-18. Head Adjust Lever
Note: If the print density is light, move the head adjust lever one step lower.
Figure 1-10. Head Adjust Lever
Printhead Protection During Heavy Duty Printing
The printhead is protected from overheating and voltage drops to the printhead driver. If the printhead temperature exceeds the upper limit, printing stops automatically until the printhead temperature drops to the required value. If heavy duty printing causes the printhead driver voltage to drop below the lower limit, printing stops. When the power supply voltage increases to the required level, the printer prints the rest of the line. This protection occurs when half or more of the wires are activated simultaneously and continuously.

Main Components

The main components are designed so that you can easily remove and replace them when you maintain or repair the printer. The main components are:
C064 MAIN PCB main control board Control Panel PCB control panel board PEBFIL-II PCB filter circuit board Transformer Model 5C10 printer mechanism.
Figure 1-11. LQ-200/AP3000 Component Layout

C064 MAIN PCB

The PD7810HG CPU on the CO64 MAIN PCB simplifies the circuit design of the main control board and controls all of the printers main functions.
Figure 1-12. C064 Main PCB

Control Panel PCB

The control panel PCB is the control panel. It includes the indicator LEDs, the control panel buttons, and the buzzer.
Figure 1-13. Control Panel PCB

PEBFIL-II PCB

The PEBFIL-II PCB filter board eliminates noise from the AC line to the printer and from the printer to the outer line. The fuse on this board prevents overheating.
Figure 1-14. PEBFiL-II PCB

Transformer

The transformer converts the input AC from the filter circuit into 28 VAC output to supply the required voltage to the control circuit board.

Figure 1-15. Transformer

Model 5Cl0 Printer Mechanism
The model X10 printer mechanism is designed specifically for the LQ-200/AP3000. Its components include the carriage motor, carriage mechanism, paper feed motor, paper feed mechanism, ribbon feed mechanism, printhead, and sensors.
Figure 1-16. Model 5C10 Printer Mechanism

Housing

The housing consists of the upper and lower cases. The upper case houses the control panel. The lower case contains the printer mechanism and the main control board.

Figure 1-17. Housing

Overview.... 2-1 2-1 Connector Summary... Overview of Printer Mechanism Operation.. 2-3 Sensors... 2-4 2-6 Motors.... 2-6 Printhead.... 2-7 Circuit Overview.. 2-8 Firmware Overview.. 2-9 Principles of Operation... 2-9 Power Supply Circuit.... 2-9 Power supply circuit block diagram Chopper-type switching regulator circuit.. 2-11 2-13 Filter circuit... 2-14 Transformer... Rectifier and smoothing circuit.. 2-15 +5 VDC regulator circuit.. 2-16 pulse width modulation circuit.. 2-19 +24 VDC regulator circuit.. 2-21 Vx voltage supply circuit... 2-24 2-25 Reset Circuit... 2-26 Power on or off... -INIT signal input from CN1... 2-26 ROM cartridge installation and removal.. 2-27 Address Decoder and Bank Register... 2-29 2-29 Address decoder... Bank register... 2-29 2-30 Carriage Operation.. 2-30 Carriage mechanism... Carriage motor drive circuit block diagram.. 2-31 Gate array E0lA05 in the carriage motor 2-32 drive circuit... Carriage motor drive circuit.. 2-33 Carriage motor software control.. 2-38 2-43 Paper Feeding... Paper feed mechanism... 2-43 Paper feed motor drive circuit.. 2-45 Paper feed motor software control.. 2-46 Printhead... 2-47 Printing... 2-47 Printhead drive circuit block diagram.. 2-48 Gate array E05A02 in the printhead drive circuit... 2-49 Printhead drive circuit.. 2-50 Printhead software control.. 2-51 A/D Converter Circuit... 2-52 Host Interface... 2-55 Ribbon Feed Mechanism.. 2-56

Figure 2-50.

Relationship Between the Head Driver Voltage and the Print Driving Pulse Width.. Figure 2-51. A/D Converter Circuit... Figure 2-52. Host Interface... Figure 2-53. Ribbon Feed Mechanism..

2-51 2-53 2-55 2-57

Table Table Table Table Table Table Table Table 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. Board Connector Summary.. Power Supply Applications.. Reference Voltages... Current Values for Reference Voltages. Phase Excitation.. Drive Sequence (2-2 Phase Excitation).. Drive Sequence (1-2 Phase Excitation).. Excitation Sequence (Clockwise for Forward Paper Feeding).. Scan Lines and DIP Switches.. Ribbon Feed Gear Train.. 2-1 2-10 2-35 2-37 2-38 2-39 2-39 2-46 2-54 2-56

Table 2-9. Table 2-10.

Overview
This chapter describes the signals at the connectors that link the printers primary components, including the printer mechanism, the power supply circuits, and the control circuits. This chapter also describes how the printers circuitry and the printer mechanism operate.

Connector Summary

Figure 2-1 shows how the primary components are connected. Table 2-1 lists and describes the connectors.
Table 2-1. Board Connector Summary
Figure 2-1. Cable Connections
Note: CR = carriage PF = paper feed HP = home position
Overview of Printer Mechanism Operation
The model 5ClO printer mechanism is a serial, impact, dot matrix printer mechanism that prints at 180 dots per inch (dpi) in both the horizontal and vertical directions. Figure 2-2 is a block diagram of the printer mechanism.
Figure 2-2. Printer Mechanism Block Diagram

Note: cw = CCW HP = PE =

clockwise = counterclockwise home position paper end
Sensors The printer mechanism contains the following sensors:
Paper end (PE) sensor Home position (HP) sensor Thermal sensor
Paper end sensor The paper end sensor switch goes on when the paper runs out. One switch detects when the paper is out for both the rear and bottom paper slots. Figure 2-3 illustrates the paper end sensor. Paper out --t on + LOW level Paper present -+ off + HIGH level
Figure 2-3. Pap End Sensor

Figure 2-9. Power Supply Circuit Block Diagram
Table 2-2. Power Supply Applications
Chopper-type switching regulator circuit The power supply circuit includes a chopper-type switching regulator. The step down circuit operates as follows:
Figure 2-10. Step Down Circuit
Figure 2-10 shows the chopper-type step down switching regulator circuit. When the transistor is on, voltage Vi is applied to coil L and capacitor C. Load current I1 flows and electromagnetic energy Wl accumulates in choke coil L. When the transistor goes off, energy Wl is applied to the load via flywheel diode D. Therefore, output voltage Vo is the average value:
Thus, Vo can be held constant by controlling Ton. Figure 2-11 shows the step down timing.
Figure 2-11. Step Down Timing

LQ2OO/AP3000

Filter circuit The AC line voltage passes through the power switch and is input to the filter circuit. The PEBFIL-II board includes a fuse, Fl. The filter circuit attenuates external noise and inhibits the noise generated in the printer from propagating through the AC line. Cl or C2 drains leakage current between the primary coil and the case. Figure 2-12 shows the filter circuit.
Figure 2-12. PEBFIL-II Filter Circuit Board
Transformer The 120 VAC that passes through the filter circuit is transformed into 26 VAC and supplied to the main board. Figure 2-13 is a schematic drawing of the power transformer.
Rectifier and smoothing circuit Diode bridge DB1 full wave rectifies the 26 VAC from the transformers secondary coil. Then smoothing capacitor C40 converts the 26 VAC into approximately 36 VDC. The +24 and +5 VDC voltages are converted from this DC voltage. The DC voltage is used as the power supply voltage for the switching regulator circuit at the next stage.
Figure 2-14. Rectifier and Smoothing Circuit
+5 VDC regulator circuit An NJM2355 switching regulator circuit is used for constant-frequency pulse width modulation. The rectifier and smoothing circuit employs an NJM2355 circuit configured as a chopper-type switching regulator circuit. Figure 2-15 illustrates the +5 VDC regulator circuit.
Figure2-15. +5 KDC Regulator Circuit
The +5 VDC regulator circuit has a built-in oscillator. External components connected to pins 2 and 3 determine the oscillation frequency. R105 and C34 cause the circuit to oscillate at about 30 KHz. Figure 2-16 shows the oscillator waveform.
Figure 2-16. Oscillator Waveform
AMP1 in the +5 VDC regulator circuit is an error amplifier that monitors the output voltage. Figure 2-17 shows the constant voltage control circuit. Pin 1 of the +5 VDC regulator circuit provides a 5 V reference output (Vref). Vref is applied to the negative terminal of AMP1. The error amplifier adjusts its output according to the voltages at its positive and negative input terminals. This keeps the positive terminal voltage at 5 V.

Figure 2-17. Constant Voltage Control Circuit
Figure 2-18 shows the output from AMP1. When the voltage at pin 4 becomes higher than that at pin 5 (over-voltage), pulse width modulation modulates the AMP1 output current and reduces the circuits output voltage. R108 and C35 compensate for phase lag in the error amplifier, preventing abnormal oscillation. (The next section describes pulse width modulation.)
Figure 2-18. AMP1 Output Control (+5 KVC)

LQ-2OO/AP3OOO

Pulse width modulation circuit This section describes how the pulse width modulation (PWM) comparator operates. Figure 2-19 shows the internal circuitry of the NJM2355 integrated circuit. In circuit 1, the output from AMP1 flows into the negative terminal of PWM comparator 1. In circuit 2, the outputs from AMP2 and AMP3 flow into the negative terminal of PWM comparator 2 without wired OR. The dead-time control voltage is input to additional negative terminals of both comparators. At the same time, a saw-tooth waveform from the oscillator is input to the positive terminals. The saw-tooth waveform causes the comparators to generate pulses as shown in Figure 2-20.
Figure 2-19. NJM2355 Internal Circuit
As shown in Figure 2-20, the dead-time control voltage controls the potential at the NJM2355 circuit when it is lower than the preset voltage or current value. When it exceeds the preset voltage, the error amplifier lowers it below the preset voltage.
Figure 2-20. Output Transistor Drive Waveform
+24 VDC regulator circuit The +24 VDC regulator circuit has approximately the same function and employs the same oscillation circuit as the +5 VDC regulator circuit. In the +24 VDC regulator circuit, error amplifier AMP2 is used for over-current control and AMP3 is used for constant voltage control. Figure 2-21 shows the +24 VDC regulator circuit.
Figure 2-21. +24 VDC Regulator Circuit
Error amplifier AMP3 operates as follows. The negative terminal of AMP 3 receives Vref (5 V) and the voltage applied to the positive terminal is adjusted to 5 V. As shown in Figure 2-22, the output voltage is:
~(Rl14+R115) = 2 4z Jhms (9.1 K ohms + 2.4K ohms) = 23.96 V
Figure 2-22. Constant Voltage Control (+24 KDC)
AMP 2 controls over current as follows. +24 V is applied to the negative terminal. The positive terminal receives an equal voltage when a negative current of the following value flows:
OutPit ylltage R 124/Rl27 =
+ohms / 0.22 ohms =5.55 A 11K ohms
If the current exceeds this value, over-current protection goes on to reduce the output voltage. Figure 2-23 illustrates over-current protection. Because pin 3 of IC1 is grounded, dead time does not apply in this case.

Figure 2-30. Carriage Motor Drive Circuit Block Diagram
Gate array E0lA05 in the carriage motor drive circuit Gate array E0lA05 (6C) implements phase switching for the carriage motor, which is a stepper motor. The gate array first sets the excitation type (2-2 or 1-2 phase) and rotation direction (clockwise or counterclockwise). When the CPU outputs a pulse to the gate arrays TM terminal, the gate array executes auto phase switching, which drives the stepper motor. Figure 2-31 shows this process.
Figure 2-31. Gate Array Operation, 2-2 Phase Excitation
Carriage motor drive circuit The LQ-200/AP3000 includes an STK-6981B, a hybrid integrated circuit used to drive stepper motors. The STK-6981B (ICSC) circuit drives the stepper motor under a constant current. An external voltage level determines the value of the current. STK-6981B operation is divided into equivalent phases AB and CD. This section describes phase CD. Figure 2-32 shows the carriage motor drive circuit. Figure 2-33 shows the STK-6981B circuit diagram.

Figure 2-32.

Carriage Motor Drive Circuit
Figure 2-33. STK-6981B Circuit Diagram
Note: Phase AB is equivalent to phase CD, which is shown in the figure above.
Reference voltage generation circuit Figure 2-34 shows the reference voltage generation circuit. Table 2-3 shows the reference voltages.
Figure 2-34. Reference Voltage Generation Circuit
Table 2-3. Reference Voltages
Constant current drive circuit The carriage motor drive current is given by the following equation:
When the carriage stops, CPU port PB5 is set to HIGH, the input to the chopping circuit becomes 0 V, and current is applied from the +5 V line to the motor via resistance Rl and diode Dl. This current is given by the following equation:
Figure 2-35 shows the constant current control circuit. Table 2-4 lists the current values for the reference voltages.
Figure 2-35. Constant Current Control Circuit
Table 2-4. Current Values for Reference Voltages
Positive feedback through R9 generates a hysteresis in the comparator of ICl. The upper limit of the hysteresis is the reference voltage. The comparator works like a Schmitt trigger, sensing a difference when the inverse terminal feedback is slightly larger or smaller than the hysteresis level. The comparator in ICl compares reference voltage a! and the feedback voltage. When reference voltage (Y is HIGH, TR6 goes on and applies approximately 25 VDC to the coil. The current rises linearly due to inductance. TR6 goes off when the feedback voltage equals the reference voltage. In this way, an almost constant current is applied to the coil. Figure 2-36 shows the carriage motors drive current waveform (pin 12) and the chopping waveform (pin 17) of the drive voltage (+24 v) at 960 pps. Figure 2-37 shows the Schmitt trigger circuit.
Figure 2-36. Chopping Waveforms
Figure 2-37. Schmitt Trigger Circuit

Figure 2-45. Printing

Printhead specifications Solenoids Wire Diameter Pin Arrangement Drive Voltage Coil Resistance 24 solenoids 0.008 inch (0.20 mm) 12 x 2, staggered 24 VDC f 10% 19.1 k 1.0 ohms at 77O F (25O C)
Printhead drive circuit block diagram Gate array E05A02 is used as an 8-bit x 3 data latch. By monitoring the printhead drive power (+24 V line), the CPU determines the pulse width for the head wire drive pulses from gate array E05A02. The CPU also monitors the printheads temperature and suspends printing.if the printhead overheats.
Figure 2-46. Printhead Drive Circuit Block Diagram
Gate array E05A02 in the printhead drive circuit The E05A02 gate array includes circuitry to interface the CPU and the printhead. This general purpose gate array has special commands that lighten the CPUs load during printhead data output. Figure 2-47 is a block diagram of gate array E05A02. Gate array operation centers around the three 8-bit data latches. The gate array also supports functions (commands) that can efficiently write data to any of the data latch bits.
Figure 2-47. Gate Array E05A02 Block Diagram
Printhead drive circuit CPU port PC6 adjusts the drive pulse width. The Vx voltage pulls up the output signals from the gate array to prevent printhead malfunctions.
Figure 2-48. Printhead Drive Circuit
Printhead software control At 960 pps, one print cycle is performed at each phase switch step to meet the printheads specifications. (The printheads solenoid drive frequency is 960 Hz). The drive pulse width is adjusted using an A/D converter to detect the drive voltage. The drive pulse width is kept within the range indicated by the oblique lines in Figure 2-50.
Figure 2-49. Print Timing

Drive Voltage(V)

Figure 2-50. Relationship Between the Head Driver Voltage and the Print Driving Pulse Width

A/D Converter Circuit

Figure 2-51 shows the A/D converter circuit. The converter has the following functions:
Monitors the +24 V line to determine the drive pulse width for the printhead. Monitors the temperature (the resistance) of the printhead. Reads the initial DIP switch settings. Reads the bidirectional adjustment setting.
Shunt regulator TL431CLPB and resistors R37 and R55 regulate reference voltage Vref as follows:
Vref = g (R55+R37) = 4.5 V
Note: The shunt regulators reference voltage is 2.5 V. Using this value as a reference, AN0 monitors the +24 V line, AN1 monitors the printhead temperature, and AN2 through AN7 read the DIP switch and bidirectional adjustment settings.

For detailed exploded diagrams of the printer and the printer mechanism, see Figures A-6, A-7, and A-8.

Removing the Printhead

1. 2. Make sure that you have removed the paper and the ribbon cartridge. Then remove the printer cover. Unlock (pull down) the two levers that secure the printhead to the carriage. Then lift up and remove the printhead.
Figure 3-1. Removing the Printhead
Disconnect the head cable from the connector on the printhead.

Removing the Case

This section describes how to remove the upper case and the control panel. Removing the upper case 1. 2. 3. Remove the printer cover and the paper guide. Remove the pull tractor assembly. Insert a standard screwdriver into each of the two holes at the front of the lower case and push to unlock each notch. Then lift up the upper case.
Figure 3-2. Removing the Upper Case - 1
While lifting up the upper case, disconnect the control panels flexible flat cable (FFC) from connector CN4 on the CO64 MAIN board. Then remove the upper case.
Figure 3-3. Removing the Upper Case - 2
Removing the control panel 1. 2. Remove the upper case as described earlier in this chapter. Turn the upper case upside down and push in the two notches that secure the control panel to the upper case. Then remove the control panel from the upper case. CAUTION When you install and remove the control panel, be careful not to damage the FFC on the control panel with the FFC guide on the upper case.
Figure 3-4. Removing the Control Panel
Removing the Circuit Boards This section describes how to remove the C064 MAIN board, the PEBFIL-II board, and the transformer. Removing the C064 MAIN board 1. 2. Remove the upper case as described earlier in this chapter. Disconnect connectors CN5, CN6, CN7, CN8, CN9, and CN10 on the C064 MAIN board. (These connectors connect the printers main components to the CO64 MAIN board.) CAUTION To disconnect the connectors, pull them out slowly and gently while holding the board. Forcefully removing the connectors can damage the board.

Figure 3-5. Removing the C064 MAINBoard
Remove the two CBB(P) screws (M3 x 10) that secure the C064 MAIN board to the base plate. Remove the shield plate.
Using a screwdriver, loosen the six bent tabs on the lower case. (These tabs secure the board to the case.) Then remove the CO64 MAIN board. CAUTION
When you remove the CO64 MAIN board from the lower case, do not bend the tabs too much. When you push the tabs, be careful not to break them or damage any of the boards components.
Removing the PEBFIL-II board 1. 2. 3. 4. 5. Remove the upper case as described earlier in this chapter. Disconnect connector CN1 on the PEBFIL-II board. (CN1 connects the transformer to the PEBFIL-II board.) Remove the CB(0) (M4 x 8) screw that secures the PEBFIL-II boards ground terminal. Remove the CPS(0) (M3 x 6) screw that secures the PEBFIL-II board to the base plate. Remove the PEBFIL-II board and the power cord.
Figure 3-6. Removing the PEBIL-II Board
Removing the transformer 1.

2. 3. 4. 5.

Remove the upper case as described earlier in this chapter. Disconnect connector CNl on the PEBFIL-II board. (CNl connects the transformer to the PEBFIL-II board.) Disconnect connector CNlO on the CO64 MAIN board. (CNlO connects the transformer to the CO64 MAIN board.) Remove the CB(0) (M4 x 8) screw that secures the transformer ground terminal. Remove the four CBB (M4 x 12) screws and the CB(0) 0!I4 x 8) screw that secure the transformer. Then remove the transformer.
Figure 3-7. Removing the Transformer
Removing the Printer Mechanism
This section describes how to remove the platen unit, the paper guide, and the printer mechanism. You remove the platen unit and the paper guide to facilitate removing the printer mechanism.
Figure 3-8. Removing the Printer Mechanism
Removing the platen unit and the paper guide 1. 2. 3. Remove the upper case as described earlier in this chapter. Remove the ground spring hook under the paper feed motor at the right side of the platen unit. Then remove the spring from the platen unit. Turn the shaft holders at the left and right sides of the platen unit as shown in Figure 3-9. Then lift the platen unit to remove it.
Figure 3-9. Removing the Platen Unit
Disconnect the cable from connector CN9 on the C064 MAIN board.
Facing the back of the printer mechanism, unlock the two paper guide notches by pushing them toward the front of the printer. Then remove the paper guide.

Notches

Figure 3-10. Back of the Printer Mechanism

Assembly Notes

Connect the end of the paper end sensor arm to the bottom paper end lever. To install the ground spring, first attach it to the hook at the front and insert it into the platen shaft. Then attach it to the hook near the paper feed motor.

Table 4-2. VR2 Specifications

Adjustment Procedures

To facilitate adjustment, VR1 and VR2 have standard positions. The standard position is the point at which the variable resistor stops when you turn it counterclockwise. To adjust the alignment, first move VR1 or VR2 to its standard position. Then rotate VR1 or VR2 as described in the following sections.
Select tractor feeding, load continuous paper, and install the ink ribbon. Move the head adjust lever to the second position.
Draft mode 1. 2. 3. Turn on the printer while holding down the ON LINE, FORM FEED, and LINE FEED buttons. Press the ON LINE button. Press the LINE FEED button. The printer prints five test patterns. The pattern corresponding to the current value of VR1 is the middle pattern. For example, in Figure 4-5, VR1 equals -4 (pattern 3).
Figure 4-5. Draft Mode Test Patterns
Select the best-aligned pattern as described here:
If the best-aligned pattern is just above the middle pattern, press the FORM FEED button once. If it is the top pattern, press the FORM FEED button twice. (See Table 4-3.) If the best-aligned pattern is just below the middle pattern, press the LINE FEED button once. If it is the bottom pattern, press the LINE FEED button twice. (See Table 4-3.)
For example, if the best-aligned pattern is VR1 = -2 (pattern 5), press the LINE FEED button twice.
Table 4-3. Selecting the Best-Aligned Test Pattern

5. 6. 7. 8.

Press the ON LINE button to print the pattern you select. Check the alignment of the printed pattern. If it is not satisfactory, return to step 4. To set VR1 for the best-aligned pattern, turn VRl until the buzzer sounds. Turn off the printer.
LQ mode The LQ mode adjustment is similar to the draft mode adjustment described above. 1. 2. Turn on the printer while holding down the ON LINE, FORM FEED, and LINE FEED buttons. Press the ON LINE button.
Press the FORM FEED button. The printer prints five test patterns. The pattern corresponding to the current value of VR2 is the middle pattern. For example, in Figure 4-6, VR2 equals +4 (pattern 3).
Figure 4-6. LQ Mode Test Patterns
For example, if the best-aligned pattern is VR2 = +5 (pattern 4), press the LINE FEED button once. 5. 6. 7. 8. Press the ON LINE button to print the pattern you select. Check the alignment of the printed pattern. If it is not satisfactory, return to step 4. To set VR2 for the best-aligned pattern, turn VR2 until the buzzer sounds. Turn off the printer.

Table Table Table Table Table Table Table Table Table Table A-1. A-2. A-3. A-4. A-5. A-6. A-7. A-8. A-9. A-10. Board Connector Summary.. Part Number Reference Table.. Connector CN3 on the C064 MAIN Board.. Connector CN4 on the C064 MAIN Board. Connector CN5 on the C064 MAIN Board. Connector CN6 on the C064 MAIN Board.. Connector CN7 on the C064 MAIN Board. Connector CN8 on the C064 MAIN Board. Connector CN9 on the C064 MAIN Board. Connector CN10 on the C064 MAIN Board. A-2 A-11 A-14 A-15 A-16 A-17 A-17 A-18 A-18 A-18
The figure below illustrates the interconnection of the primary components. Table A-l describes the function and size of the connectors.
Figure A-l. Cable Connections
Table A-l. Board Connector Summary

Circuit Diagrams

Figure A-2. C064 MAIN Board Circuit Diagram
Figure A-3. PEBFILL_II Board Circuit Diagram
Figure A-4. Control Panel Circuit Diagram
Circuit Board Component Layout
Figure A-5. C064 MAlN Board Component Layout

LQ-200/AP3000 A-7

Exploded Diagrams
Figure A-6 LQ-200/AP3000 Exploded Diagram
Figure A-7. M-5C1O Printer Mechanism Exploded Diagram
Figure AS. Tractor Exploded Diagram
Table A-2. Part Number Reference Table
Note: ESG = Epson standard gray

Case Outline Drawings

Figure A-9 LQ-200/AP3000 Case Outline Drawing
Figure A-10. LQ-200/AP3000 Case Outline Drawing with Tractor Unit
Table A-3. Connector CN3 on the CM4 MAINBoard
Table A-3. Connector CN3 on the C064 MAIN Board (cont.)
Table A-4. Connector CN4 on the C064 MAlN Board
Table AS. Connector CN5 on the C064 MAINBoard
Table A-6 Connector CN6 on the C064 MAlN Board
Table A-7. Connector CN7 on the C064 MAINBoard
Table A-7. Connector CN7 on the C064 MAlN Board (cont.)
Table A-8. Connector CN8 on the C064 MAINBoard
Table A-9 Connector CN9 on the C064 MAIN Board

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M DLQ2000 ERC02 ERC03 S Dng Cho Loi My Epson DLQ2000/ Epson DLQ2000K/ Epson LQ2550/ Epson LQ1060/ Epson Black LQ860 Epson ERC02 II/ IM215S UNIVERSAL CAL. CART SEIKOSHA VICTOR 600 BK/ RED CANON/ CASIO/ CITIZEN/ SHARP CALCULATORS Epson 7300/ 7400/ 7600/ 9700/ A55/ Facit ER2970/ FUJITSU G3400/ 5400/ KINGSTRON KP10/ OMRON RS07/ Black PANASONIC 6600/ 7000/ QUEN DATA ECR525/ SANYO ECR525/ 720 CETIZEN MSP10/ 10E/ 20/ 40/ 50 EPSON ERC04 EPSON FX/ MX/ RX-70/ 80/ 85/ 90/ EPSON LX400/ 800/ 810/ Black 850/ 870/ 300/ 860/ 86E/ NCR PRSM7150 ACTION 2000/ T1000 APEX80 HP 82906/ 9215B C.ITOH 150/ Datamega DPN 150-16/ 154-16/ 238-16/ 288-40/ EPSON 150/ Black ERC-05/ Radio Shack PC1/ 2 Citizen 224/ 224S/ HQP45. EPSON ERC20/ EPSON LQ1000/ 1010/ 1050/ 1070/ 1170.EPSON LQ1000K/ 1600K/ 1900K/ 1800K/ OLYMPIA NP 136-24/ Black NP 136SE STONE MS2406 Star LQ1900K/ 1600K/ 1900K II OLYMPIA FX 1000/ 1800 SHINWA EL - 2415/ SIEMENS PT89/ NCTOR 60200 EPSON M160/ 161/ 180/ 181/ 182/ 183/ 185/ 190/ 191/ 192/ 150/ 163/ 164/ EPSON EPC-09/ 08/ 22/ EPSON HX 20/ 40 FUJTSU F3588B/ 3589D Black CASIO DT6000/ HITACHI DF 6000/ HT2391 Diebold 1060/ 1071ATM/ Epson 505/ 515/ 524/ 545/ 518A/ 518T/ 525/ CTM-545, Sanyo 700/ 7000 ECR/ 7100 ECR/ Sharp 5200/ 5210/ EP52GM/ Black G2SPM/ AMSTRAD/ FR4000/ FR4300/ GA318/ M505/ 525/ 1071/ IBM4782~478 Epson ERc 22/ ERC 40/ Norand 480 Long Life For M-180/ 190. Epson M1810/ 190 Casio CE-250 PURPLE Mu
Epson CE 4110/ 4115/ 4415/ 4500/ 4630 EPSON ERC 18 OMRONRS5510/ 5543/ 8550/ SHARP ER 3100/ 3250/ 4110/ 2660/ 2661/ 2666/ 2635/ 2636/ Black 2637/ 2640/ 2641/ 2642/ 2645/ 2646/ 2647/ 2667/ 4100SR Epson M2630/ 2631/ 2632/ Casio TK 2100/ 4000/ 4200/ 4300/ AR Citizen 124/ HQP40 Epson ERC19/ Shinwa EL2410/ Epson LQ200/ 300/ 400/ 500/ 510/ 550/ 570/ 800/ 850/ 850 +/ 870 Olympia NP70-24/ NP80-24/ Black NP80-24E/ Citizen 248HQP-40 Actionprint 3000/ 5000+/ L1000/ M3210/ Purple 3310 Citizen 24/ Citizen224S/ Citizen HQP45/ Epson ERC 20/ EPSON LQ1010/ Epson LQ1050/ Epson LQ 1070/ Epson LQ 1170/ Epson LQ1000K, Epson LQ 1600K/ Epson LQ 1900K/ Olympia NP 136-24/ Olympia NP 136SE/ Stone MS2406 Epson ERC22/ ERC40/ Norand 480 Long Life For M-180/ 190 / Epson M1810/ 190 Casio CE-250 Epson M250/ 255/ 257/ 260/ 262/ 267/ Epson ERC23/ 30/ Towa 1420/ R1 Sharp 3210/ Epson M264/ 265/ 270/ 280/ 280A/ 300/ 267/ Panasonic P1100WP/ PM700/ 7000-P100WP/ Sanyo ERC59015 Epson RP 265/ RP270/ TM267/ TM 270 Sanyo ERC59/ 595 Epson CTM 290/ 390 Fujitsu G5800/ 5840 Slip PTR Omron SP50/ Micros 1700/ 2700 Slip PTR Epson M290/ TM290/ TM-U285/ CTM290/ M-V295 Black

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Epson ERC30/ C34/ C38/ Epson TM 270/ 300/ TMU 375/ 270/ 300A/ 300B/ 300D/ Epson TMU370/ TM-U200/ TM-U300/ TM-U375/ TM-U230/ TM-280/ Black TM-2100/ Epson M250/ M-260 Epson M930/ Epson TM-930II/ IPC TM-930II/ TM900/ TM 930/ 950/ TMU950/ TM-H5000II/ TM-U590/ TM925 Omron/ RS6000/ P57000 Fujitsu TM- Black U925/ U950 Epson TM930/ TM935/ Epson M820/ M825/ Sharp/ 3550/ Sharp EP3550/ ER550/ TM-U1550/ TM-H6000/ Tecma-1350/ MA-1350F Sharp ER550 TM- Black U65 Casto CE4200/ 4700/ TK1300/ 2700/ 6000/ 7000/ 7500 Epson ERC30/ C34/ C38/ Epson TM270/ 300/ TMU375/ 270/ 300A/ 300B/ 300D Epson TMU370/ TM-U200/ TM-U300/ TM-U375/ TM-U230/ TM-280/ TM-2100/ Epson M250/ M-260 Black
ERC34 ERC35 ERC37 ERC38 LQ100 LQ150 DLQ3000 DFX5000 PLQ-20K LQ630K LQ1600K LQ1000 LQ2180 LQ2170 LQ300 LQ800 LQ2550 LQ670 LQ680 LQ590 FX980 DFX9000 FX2190
Epson ERC35/ Epson M875/ Epson M31SP/ Nixdorf Beetle 50 Pos/ Nixdorf Black Beetle 50 PX3/ Siemens Beetle 50 Pos/ Siemens Ker 2000 Epson ERC 37/ TM780/ ECR425/ ECR 445/ Epson M760/ 760S/ 780 Epson ERC30/ C34/ C38/ Epson TM270/ 300/ TM U375/ 270/ 300A/ 300A/ 300B/ 300D/ Epson TMU 370/ TM-U200/ TM-U300/ TM-U375/ TM-U230/ TM-280/ TM-2100/ Epson M250/ M-260 Epson Actionprinter 3250/ Epson AP3250/ Epson LQ100/ 150/ 150K EpsonQuite Color Epson DLQ3000/ DLQ3000/ DLQ3500K/ SO15066/ SO15139 Epson DFX 5000/ 8000/ 8500/ 850/ SO8766/ SO8767 Epson PLQ-20/ 20m/ 20k/ 20km Epson SO15139 Epson LQ630K/ SO 15290 Citizen 224/ 224S/ HQP45/ Epson ERC20/ Epson LQ1000/ 1010/ 1050/ 1070/ 1170/ Epson LQ1000K/ 1600K/ 1900K/ 1800K/ Olympia NP 136-24/ NP136SE/ Stone MS2406/ Star LQ1900K/ 1600K/ 1900KII/ Olympia FX1000/ 1800/ Shinwa EL-2415/ Siemens PT89 NCTOR60200 Black Purple Black Black Black Black Black Black Black Black Black