Apple ImageWriter II/L Service Source

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Apple ImageWriter II/L Printer PDF Service source

  • Model: ImageWriter II/L
  • Brand: Apple
  • Type: Service source
  • Category: Printer
  • File Size: (1.19 Mb)
  • No. of pages: 194
Download Apple ImageWriter II/L PDF Manual

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1 Page 1 of Apple ImageWriter II/L Service source

ImageWriter II/L Service Source K ImageWriter II/L (...)

2 Page 2 of Apple ImageWriter II/L Service source

Apple ImageWriter II/L Manual Basics Introduction - 1 Introduction The electrical operation of the printer consists of five printed circuit boards, three motors, and several switches. The boards are the power supply board, main board, sub PCB board, print head board, and the operation panel board. (...)

3 Page 3 of Apple ImageWriter II/L Service source

Apple ImageWriter II/L Printer Manual Basics Introduction - 2 The three motors are the carrier motor, line feed motor, and the ribbon position motor. Switches are the home position switch, paper-out sensor switch, and the ribbon switch. (...)

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Apple ImageWriter II/L Service source Basics Power Supply - 3 Power Supply The ImageWriter II/L has a switching type power supply that eliminates the need for a bulky transformer. When the input AC current is applied to this board, the power supply reduces and rectifies the voltage to the following DC voltages: • + 5 V DC • – 5 V DC • + 26 V DC (...)

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Apple ImageWriter II/L Manual Basics Power Supply - 4 The + 5 and –5 V DC voltages are for logic; the + 26 V DC is for motor drive. All the voltages are fed from connector CN5 on the power supply board to connector CN3 on the main board. From the main board the voltages are distributed to the other boards and motors. (...)

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Apple ImageWriter II/L Printer Manual Basics Power Supply - 5 The power supply has two fuses to help protect the electronics—FU1 is a 120 V 2-amp fuse and FU2 is a 125 V 4–amp fuse. Note: Although not on the power supply board, there is another fuse, FU1, located on the main board that protects the + 26 motor voltage. (...)

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ImageWriter II/L Basics Power Supply - 6 The on/off power switch is connected to the power supply board and disconnects or connects the main AC current to the board. The switch is comprised of a cable type plunger that is attached to the power supply board. Caution: This power supply is not compatible with the older ImageWriter II. Do not attempt to switch the power supplies between models. (...)

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Apple ImageWriter II/L Printer Manual Basics Main Board - 7 Main Board The main board is the heart of the printer. Besides handling the distribution of the voltages, it also handles all the logic that controls the printer. It is also the source of the drive signals for the print head. All sensor signals that affect the operation of the printer are fed to this board. (...)

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Apple ImageWriter II/L Manual ImageWriter II/L Basics - 8 ROM The ROM (IC10) chip has the start-up routines and several features such as character sets and self-test routines built in. RAM The RAM (IC9) is used in the transfer of data and acts as a buffer. When printing starts, the data to be printed is transferred from the host CPU to the RAM on the printer. From the RAM the data is passed through the logic and sent to the print head to print. T (...)

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Apple ImageWriter II/L Manual ImageWriter II/L Basics - 9 CPU and Gate Array The CPU (IC8) along with the gate array (IC4), handles the logic and decision- making of the printer. They combine to evaluate the status of the printer and issue commands concerning when to transfer data, when to start printing, when to run the motors, and what actually prints. All the functions of the printer are controlled by these two devices. The rest of the circuits are (...)

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Apple ImageWriter II/L Printer Manual ImageWriter II/L Basics - 10 Line Feed The drive circuit is made up of transistors Q8, Q9, Q10, and Q11. Four drive signals from the gate array are processed in this circuit. Higher voltage and current are added to the phase control signals to turn on the line feed motor. The signals are sent to the line feed motor and the ribbon motor through CN1. Ribbon Motor Drivers This circuit is made up of transistors Q3, Q4, Q5, (...)

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Apple ImageWriter II/L Printer Manual ImageWriter II/L Basics - 11 Reset Circuit This circuit is used when the printer is turned on to keep the logic in a reset state until the voltages are up to correct values. Once the voltages are at the correct level, reset is released and the logic is allowed to start functioning from a known state. Connector CN6 This connector is a LocalTalk option card connector. This card allows the printer to communicate on the Loc (...)

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Apple ImageWriter II/L Printer Manual Basics Sub PCB Board - 12 Sub PCB Board The sub PCB board acts as an interface board. The interface cable from the host CPU is plugged into the connector CNS1 on this board. The signals from the host CPU pass through the sub PCB board on their way to the main board. If a cut- sheet feeder is attached to the printer, the signals pass through the sub PCB board through CNS2, which controls the actions of the feeder. (...)

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Apple ImageWriter II/L Printer Manual Basics Sub PCB Board - 13 The paper-out sensor wires go to this board through CNS3 and are passed along to the main board. All the signals coming or going to the sub PCB board are sent through CNS4 and the ribbon cable to the main board at connector CN4. (...)

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ImageWriter II/L Basics Print Head Board - 14 Print Head Board The print head board receives the print head drive signals from the main board through CNH1. The signals are then sent out on connector CNH2 to the print head. This board also handles the ribbon motor drive signals and the ribbon switch signals. If the switch is activated, a color ribbon is detected. (...)

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ImageWriter II/L Basics Print Head Board - 15 This information is sent to the main board, which in turn sends controlling signals to the ribbon motor to control the position of the ribbon to allow color printing. The home position switch alerts the CPU that the carriage is at the far left side of the printer, which is home position. (...)

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ImageWriter II/L Basics Operation Panel Board - 16 Operation Panel Board The operation panel board has the switches (select, print quality, line feed, and form feed) and indicators (error, power, print quality, and select) mounted on it. It interfaces with the CPU through CN7 on the main board. While the power switch button is located on the operation panel, it is not connected to the operation panel board. Operation Panel (...)

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Apple ImageWriter II/L Printer Manual Basics Operation Panel Board - 17 The switch button just passes through to the switch mounted on the main frame underneath the operation panel. Operation Panel (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 18 Operation Panel The operation panel consists of operating switches and indicator lights. The operating switches are the buttons with which you control the printer, and the indicator lights let you know what state the printer is in. Operating Indicator Switches Lights (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 19 Operating Switches Power Switch - The power switch turns the printer on and off. Power Switch (...)

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ImageWriter II/L Basics Operation Panel - 20 Select Switch - The select switch toggles the printer between a selected (online) and a deselected (off-line) state. If printing is in progress when the select switch is pressed, the printer finishes printing the current line and a maximum of two additional lines, and stops printing. Select Switch (...)

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Apple ImageWriter II/L Manual Basics Operation Panel - 21 If you want to clear the buffer, you must turn off the printer. Pressing the select switch also clears a corrected error condition. If an out-of-paper condition exists, pressing the select switch temporarily overrides the error to allow the print of one line. This process is repeatable as long as there is printable data in the printer buffer. Select Switch (...)

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ImageWriter II/L Basics Operation Panel - 22 Print Quality Switch - The print quality switch allows the user to choose one of three printing modes. Pressing the print quality switch repeatedly changes the mode from the standard print mode, to the NLQ print mode, to the draft print mode, back to the standard print mode again. The print quality switch does not function unless the printer is in an off-line (deselected) state.Ê Print (...)

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Apple ImageWriter II/L Manual Basics Operation Panel - 23 Form Feed - The form feed switch does not function unless the printer is in an off-line (deselected) state. When the form feed switch is pressed, the printer feeds paper until the next top of form is reached. Form Feed (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 24 If the switch is pressed and no paper is present, the printer assumes a single sheet is being loaded. The printer feeds the single sheet up to the top of form position. If the switch is pressed and paper is present, the printer monitors the paper-off switch while feeding paper. If the printer detects an out-of-paper condition before the top of form is reached, the printer assumes that sing (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 25 For the single sheet case, four inches of paper motion is added to the form feed to ensure that the page is properly ejected. Form Feed (...)

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Apple ImageWriter II/L Printer Manual Basics Operation Panel - 26 When an automatic cut- sheet feeder is present, the paper-loading sequence is slightly different. When the form feed is pressed with no paper present, the printer first rolls the platen to check if a single sheet had been inserted. If no paper is found, the printer loads a sheet from the automatic sheet feeder and positions it at the top-of-form position. Form Feed (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 27 Indicators Power - When lit, the power light indicates that power is on. Select - When the select indicator is lit, the printer is online, in a ready state so that a transmission can take place. Power Select (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 28 Print Quality - The print quality light indicates three modes of operation: • NLQ–When both the left and right indicators are lit, the printer is in the Near Letter Quality print mode. • Draft–When just the left indicator is lit, the printer is in the Draft print mode. Print Quality (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 29 • Standard–If the right indicator is lit, the printer is in the Standard print mode. This is the default mode when the printer is turned on. Print Quality (...)

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Apple ImageWriter II/L Service source Basics Operation Panel - 30 Error - The error light has three ways of indicating an error condition in the printer: • If the error light comes on steady and stays on (and the select light goes off), the printer is out of paper. • If the light blinks in a steady fashion (evenly spaced blinks), a cover is open or a left-margin error has occurred. Error (...)

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Apple ImageWriter II/L Manual Basics Operation Panel - 31 • If the light blinks in a repeating sequence of one short blink and a long blink, an interface communication or a RAM check error has occurred. Error (...)

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Apple ImageWriter II/L Printer Manual Service Source K Specifications ImageWriter II/L (...)

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Apple ImageWriter II/L Manual Specifications Characteristics - 1 Characteristics Print Methods Draft Mode: 250 characters per second (cps); 25 in. per second (ips) at 10 characters per in. (cpi) Standard Mode: 180 cps; 18 ips at 10 cpi NLQ Mode: 25 cps 100 in. per minute (ipm) at 80 dpi Throughput 9 wires Print Head .0139 in. (.353 mm) nominal Standard:.0118 in. (.300 mm) nominal Japan:.0098 in. (.250 mm) nominal Response Time 1440 Hz (...)

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Apple ImageWriter II/L Service source Specifications Characteristics - 2 Life Standard: 4 by 108 strokes/wire Japan: 2 by 108 strokes/wire Graphics Duty Cycle 25% minimum Character Sets ASCII (96 characters) Six European sets MouseText (32 characters) Ribbon Fabric ribbon Black or four-color (cannot use color with Kanji print head) (...)

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ImageWriter II/L Specifications I/O Interfaces - 3 I/O Interfaces Interface Standard asynchronous LocalTalk With option board Operation Asynchronous, switch selectable; Data ready/busy (hardware handshake), or Xon/Xoff serial protocols Connectors Mini DIN-8 26-pin male (optional) Data Format Asynchronous serial/no parity bit shall be sent (...)

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Apple ImageWriter II/L Printer Manual Specifications I/O Interfaces - 4 Transmission Speed Switch selectable (300, 1200, 2400, and 9600 baud) Input Buffer 254K (...)

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Apple ImageWriter II/L Manual Specifications Paper Feed - 5 Paper Feed Method Friction feed, adjustable tractors, and automatic single-sheet loader Accessories Automatic, cut-sheet feeder Direction Bidirectional (friction feed or tractor feed) Single sheets, sprocket feed, multicopy (original + three copies), single-width labels Type .002–.011 in. (.05–.28 mm) equivalent to 15–25 lb. bond Thickness 3.5 in. minimum to “n” in. maxim (...)

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Apple ImageWriter II/L Service source Specifications Electrical - 6 Electrical Line Voltage USA/Japan: 85–132 VAC; 48–62 Hz Europe/Australia: 185–265 VAC; 48–62 Hz Stand-by:20 W maximum Operation: 180 W maximum (...)

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ImageWriter II/L Specifications Physical - 7 Physical Dimensions Height: 5 in. Width: 17 in. Depth: 12 in. Weight 25 lb. maximum (...)

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Apple ImageWriter II/L Service source Specifications Environmental - 8 Environmental Temperature Operation:10–40°C Storage: (one year) –40 to 47°C Transit: (72 hours) –40 to 65°C Relative Humidity Storage: (six months) 10–95% (...)

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Apple ImageWriter II/L Manual Service Source K Troubleshooting ImageWriter II/L (...)

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Apple ImageWriter II/L Printer Manual Troubleshooting General/ - 1 General The Symptom Charts included in this chapter will help you diagnose specific symptoms related to your product. Because cures are listed on the charts in the order of most likely solution, try the first cure first. Verify whether or not the product continues to exhibit the symptom. If the symptom persists, try the next cure. (Note: If you have replaced a module, reinstall the original modul (...)

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Apple ImageWriter II/L Manual Troubleshooting Symptom Charts /Preliminary Check - 2 Symptom Charts Preliminary Check Error light blinks 1 Verify that paper cover is secure. 2 Verify that paper cover magnet is in place. 3 Try known-good software. 4 Verify that option card dip switch SW2-4 is open/off with no card installed. Select light off, error light on 1 Add paper or reset paper feed tray. 2 Verify that paper-out sensor works correctly (see Take Apart (...)

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Apple ImageWriter II/L Printer Manual Troubleshooting Symptom Charts /Preliminary Check - 3 No printing or garbled printing 1 Check interface cable connection between printer and computer. 2 Verify that DIP switches (2-1 through 2-4) are set correctly. Software-specific problem Try known-good software. Prints OK for a while; then prints garbage Set DIP switch SW2-3 to correct serial protocol. Overprinting Verify that program is set for correct line spacing and li (...)

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Apple ImageWriter II/L Service source Troubleshooting Symptom Charts/Preliminary Check - 4 Erratic carrier motion, loud hum Remove black tube-shaped shipping protection from carrier shaft. Printing has squashed lines; misregistration problems with pin feed paper 1 For best print quality, instruct customer to place stack of paper behind printer and no more than three feet below printer. The paper should have a clear, unobstructed entry and exit path. 2 Verify t (...)

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Apple ImageWriter II/L Manual Troubleshooting Symptom Charts /Print Quality - 5 Print Quality Compressed first or second line 1 Check position of paper behind printer to ensure there isn’t anything blocking paper entry or exit. 2 Replace main board. Print is darker or lighter on one side Remove or install shims. See the Shims topic in the Additional Procedures chapter. Top row of dots missing on printout Perform “Ribbon Adjustment” (refer to Adjust (...)

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Apple ImageWriter II/L Printer Manual Troubleshooting Symptom Charts/Print Quality - 6 Missing dots 1 Check flexible cable connection. 2 Remove dot head and verify that pins in connector on dot head board are not bent. 3 Go to “Printing” (see Flowcharts). Color self-test does not work 1 Verify that color ribbon detect switch operates and wires are unbroken. If defective, replace switch. 2 Top plate of carrier assembly (under ribbon cartridge) is not properly en (...)

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Apple ImageWriter II/L Manual Troubleshooting Symptom Charts /Carriage Movement - 7 Carriage Movement Carriage doesn’t move; LEDs are not lit 1 Replace main board. 2 Replace power supply board. Carriage doesn’t move; LEDs are lit 1 Replace main board. 2 Replace power supply board. Carriage assembly moves to the left and does not return to center 1 Verify operation of switch on print head board. If switch is frozen or defective, replace print head bo (...)

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Apple ImageWriter II/L Service source Troubleshooting Symptom Charts/Carriage Movement - 8 Carriage moves to the left and hums very loudly 1 Verify that flexible ribbon cable is properly connected to main board and to its connector under carriage assembly on print head board. 2 Replace flexible ribbon cable. 3 Replace power supply board. Carriage assembly grinds or is difficult to move 1 Replace fuse on main board. 2 Replace power supply board. Carrier binds on l (...)

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Apple ImageWriter II/L Manual Troubleshooting Symptom Charts/Carriage Movement - 9 Self-test produces no carrier movement (LEDs are lit) 1 Remove mechanical assembly to ensure that wires to carrier motor are not pinched. If wires to carrier motor are worn, replace them. 2 Replace fuse on main board. 3 Replace main board. (...)

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ImageWriter II/L Troubleshooting Symptom Charts/Paper Feed - 10 Paper Feed Grinding during paper feed 1 Remove platen knob to verify that there are no obstructions in the gears beneath knob. 2 Adjust paper guide (refer to Adjustments). 3 Replace line feed motor. 4 Replace main board. Paper adjustment lever does not move Verify that power on/off cable is not pinched between lever and metal frame or plastic case. (...)

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Apple ImageWriter II/L Printer Manual Troubleshooting Symptom Charts/Miscellaneous - 11 Miscellaneous Hexadecimal data prints Power printer off and then on. Power supply goes bad repeatedly Verify that power supply and motor wires are not pinched. If wires are pinched, lift mechanical assembly and reposition wires. Ribbon jams or does not advance 1 Check gear box on carrier assembly. Verify that gear with cross (+) sticks through carrier assembly top plate and (...)

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Apple ImageWriter II/L Manual Service Source K Take Apart ImageWriter II/L (...)

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ImageWriter II/L Take Apart Covers - 1 Covers No preliminary steps are required before you begin this procedure. Caution: Review the ESD precautions in Bulletins/ Safety. Note: This procedure covers the removal of the top cover, tractor cover, ribbon cover, and ribbon cartridge. Note: To make reassembly easier, label all cables and connectors during the take- apart procedure. Ribbon Cartridge Paper Cover Tractor Cover Ribb (...)

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ImageWriter II/L Take Apart Covers - 2 Paper Cover Note: The paper cover assembly must be in place for the printer to work. Gently pull the paper cover up and forward and remove the cover. Replacement Note: Remove the paper cover from the ribbon cover only if the paper cover is broken and needs replacement. Push in the two tabs and separate the paper cover from the ribbon cover. Paper Cover Ribbon Cover (...)

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Apple ImageWriter II/L Service source Take Apart Covers - 3 Ribbon Cartridge Gently pull the tabs apart and lift the cartridge out. Ribbon Cartridge Tab Tab (...)

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Apple ImageWriter II/L Printer Manual Take Apart Covers - 4 Top Cover 1 Push the carrier assembly to the far left. 2 Pull off the platen knob. 3 Loosen the two captive screws. Platen Captive Screw Captive Screw Knob (...)

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Apple ImageWriter II/L Service source Take Apart Covers - 5 4 Grasp the top cover on the left at the part that goes over the leg. 5 Release the latch and lift the cover one inch. Latch Top Cover (...)

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ImageWriter II/L Take Apart Covers - 6 6 Gently rotate the cover toward the front and turn the cover over. 7 Using your thumb and forefinger, unlock connector CN7 and remove the ribbon cable. 8 Lift off the top cover. Replacement Note: Perform the self-test. Connector CN7 (...)

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ImageWriter II/L Take Apart Covers - 7 Tractor Cover Gently pull the tractor cover up and forward until the cover snaps free. Tractor Cover (...)

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ImageWriter II/L Take Apart Operation Panel - 8 Operation Panel Before you begin, remove the covers. Caution: Review the ESD precautions in Bulletins/ Safety. Operation Panel (...)

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ImageWriter II/L Take Apart Operation Panel - 9 1 Remove the three screws and lift the operation panel board from the top cover. 2 Disconnect the cable from the operation panel board. Right- -Left Cable Operation Top Cover Panel Board (...)

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Apple ImageWriter II/L Printer Manual Take Apart Operation Panel - 10 3 Note : To make reinstallation easier, observe the position of the power switch plunger and spring. Remove the spring and power switch plunger from the top cover. Replacement Note: Perform the self-test. See the Additional Procedures chapter. Power Top Cover Switch Plunger (...)

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ImageWriter II/L Take Apart Main Board - 11 Main Board Before you begin, remove the following: • Covers • Option board Caution: Review the ESD precautions in Bulletins/ Safety. Main Board (...)

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Apple ImageWriter II/L Service source Take Apart Main Board - 12 1 Disconnect the three cable connectors from the left side of the main board: • CN1 • CN2 • CN3 Right- Main Board (...)

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Apple ImageWriter II/L Service source Take Apart Main Board - 13 2 Remove the six screws. 3 Tilt the front half of the board up and gently lift the board partially out. Replacement Note: Make sure to replace the ground clip on the screw at the lower left of the board. Main Board Ground Clip (...)

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Apple ImageWriter II/L Service source Take Apart Main Board - 14 4 Caution: Make sure you release both sides of the connector before you pull out the ribbon cable. Using a small screwdriver, unlock each side of connectors CN4 and CN5 and remove the two ribbon cables. Replacement Note: Perform the self-test. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Print Head and Paper Guide - 15 Print Head and Paper Guide Before you begin, remove the covers. Caution : Review the ESD precautions in Bulletins/ Safety. Note : The print head does not have to be removed in order to remove the paper guide. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Print Head and Paper Guide - 16 Print Head 1 Lift the paper bail to its highest position. 2 Set the paper thickness lever to its widest setting. (...)

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Apple ImageWriter II/L Service source Take Apart Print Head and Paper Guide - 17 3 Gently push and hold aside the white print head clamp release lever and slowly lift the print head straight out of the connector. Replacement Note: Perform the self-test. (...)

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ImageWriter II/L Take Apart Print Head and Paper Guide - 18 Paper Guide Remove the two screws and lift out the paper guide. Replacement Note: Adjust the paper guide. See the Adjustments chapter. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Ribbon Cam Assembly - 19 Ribbon Cam Assembly Before you begin, remove the covers. Caution : Review the ESD precautions in Bulletins/ Safety. Note : There are two versions of the ribbon cam assembly. One has a plastic cap and the other has a hex nut, without the cap. (...)

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ImageWriter II/L Take Apart Ribbon Cam Assembly - 20 1 Unscrew the plastic cap from the ribbon cam. 2 Remove the red adjustment ring and the spring. 3 Remove the plastic collar. Plastic Cap Adjustment Ring Spring Plastic Collar (...)

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Apple ImageWriter II/L Manual Take Apart Ribbon Cam Assembly - 21 4 Note : For versions with the hex nut, remove the nut and proceed with the rest of the procedure. Using small needlenose pliers, remove the retaining clip and two washers. 5 Remove the vertical knurled nut. (...)

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Apple ImageWriter II/L Service source Take Apart Ribbon Cam Assembly - 22 6 Turn and lift off the ribbon cam. 7 Remove the spring. (...)

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Apple ImageWriter II/L Manual Take Apart Ribbon Cam Assembly - 23 Replacement Note: When you replace the cam, set the cam at its lowest setting. Verify that the two tabs of the ribbon plate are riding on the cam ridge. Improper positioning of the cam can cause poor-quality prints or no prints. Replacement Note : Adjust the ribbon cam (see “Ribbon Cam” in the Adjustments chapter). (...)

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Apple ImageWriter II/L Manual Take Apart Carrier Assembly Top Plate - 24 Carrier Assembly Top Plate Before you begin, remove the covers. Caution : Review the ESD precautions in Bulletins/ Safety. (...)

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Apple ImageWriter II/L Manual Take Apart Carrier Assembly Top Plate - 25 1 Caution : Do not use force when you remove the black plastic arms. You will break them. Using a small flat-blade screwdriver, push out the black bearing arm. 2 With another small screwdriver, gently pry the arm upward at a slight angle. 3 Move the small arm to the top. (...)

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Apple ImageWriter II/L Manual Take Apart Carrier Assembly Top Plate - 26 4 Gently pull the plastic bearing straight out and remove the small washer. 5 Repeat for the right side. Replacement Note : The bearings are not interchangeable. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Carrier Assembly Top Plate - 27 6 Gently pry the top of the wire clamp from the carrier assembly and remove the color ribbon detect switch wires from the clamp. (...)

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Apple ImageWriter II/L Manual Take Apart Carrier Assembly Top Plate - 28 7 Using a jeweler’s screwdriver, push the gear assembly tabs toward the center of the ribbon plate and lift off the top plate. Leave the gear assembly in the carrier housing. (...)

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Apple ImageWriter II/L Manual Take Apart Carrier Assembly Top Plate - 29 Color Ribbon Detect Switch 1 Note: Do not bend the plastic tabs that hold the wires. Carefully pry the wires out of the embedded track of the top plate. (...)

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Apple ImageWriter II/L Service source Take Apart Carrier Assembly Top Plate - 30 2 Turn over the top plate. Using a small screwdriver, gently pry the four latches and at the same time push down on the bottom of the switch so the switch comes out from the top of the plate. (...)

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Apple ImageWriter II/L Manual Take Apart Ribbon Wire and Gears - 31 Ribbon Wire and Gears Before you begin, remove the following: • Covers • Carrier assembly top plate Caution : Review the ESD precautions in Bulletins/ Safety. (...)

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ImageWriter II/L Take Apart Ribbon Wire and Gears - 32 1 Unhook the ribbon wire from the right side of the frame, and then from the left side of the frame. Remove the ribbon wire. (...)

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Apple ImageWriter II/L Service source Take Apart Ribbon Wire and Gears - 33 2 Lift the gear assembly from the carrier housing. Replacement Note: Perform the self-test. Replacement Note: Be sure the wire is rewrapped with the wire crossing in front of the gear. Then secure the wire on the right side. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Drive Belt/Carrier Motor - 34 Drive Belt/Carrier Motor Before you begin, remove the covers. Caution : Review the ESD precautions in Bulletins/ Safety. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Drive Belt/Carrier Motor - 35 Drive Belt 1 Loosen the screw on the pulley tension plate. Do not remove the screw. 2 Using a large screwdriver, push toward the right side and remove the drive belt from the right-side pulley. Adjustment Right Side Carrier Screw Pulley Pulley Arm (...)

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Apple ImageWriter II/L Printer Manual Take Apart Drive Belt/Carrier Motor - 36 3 Remove the drive belt from the left-side pulley. (...)

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Apple ImageWriter II/L Service source Take Apart Drive Belt/Carrier Motor - 37 4 Remove the screw from the retaining clip. 5 Using a small flat-blade screwdriver, pry up the retaining clip from the housing and remove the belt. Replacement Note: The retaining clip is glued to the drive belt. (...)

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Apple ImageWriter II/L Service source Take Apart Drive Belt/Carrier Motor - 38 Carrier Motor Remove the three screws that secure the carrier motor and remove the carrier motor. Replacement Note: Inspect the self-adhesive damping pad between the motor and the frame. Replace the pad if necessary. (...)

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Apple ImageWriter II/L Service source Take Apart Mechanical Assembly - 39 Mechanical Assembly Before you begin, remove the covers. Caution: Review the ESD precautions in Bulletins/ Safety. (...)

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Apple ImageWriter II/L Manual Take Apart Mechanical Assembly - 40 1 Remove the six screws that hold the mechanical assembly to the bottom case. Note: Do not remove screw A at the back of the assembly nearest the left side. This screw holds the sub board in place. (...)

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ImageWriter II/L Take Apart Mechanical Assembly - 41 Replacement Note: Two screws make the ground connection between the power supply plate and the rest of the mechanical assembly. If you do not replace both screws, the ground is not complete and logic errors or hazards can result. (...)

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Apple ImageWriter II/L Service source Take Apart Mechanical Assembly - 42 2 Remove the two screws that hold the power switch cable in place. 3 If the main board is in the printer, disconnect the connector at CN3 on the main board. (...)

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Apple ImageWriter II/L Printer Manual Take Apart Mechanical Assembly - 43 4 Grasp the middle of the back tractor bar. With the other hand hold the middle of the support wall and lift the entire mechanical assembly from the case. (...)

98 Page 98 of Apple ImageWriter II/L Service source

Apple ImageWriter II/L Service source Take Apart Mechanical Assembly - 44 Replacement Note: As you lower the assembly into place, make sure to route the power supply cable correctly and to align the power switch cable correctly. Correct placement will ensure that the cables do not pinch when you lower the assembly into place. (...)

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ImageWriter II/L Take Apart Flexible Ribbon Cable - 45 Flexible Ribbon Cable Before you begin, remove the following: • Covers • Mechanical assembly • Carrier assembly top plate Caution: Review the ESD precautions in Bulletins/ Safety. Flexible Ribbon Cable (...)

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Apple ImageWriter II/L Manual Take Apart Flexible Ribbon Cable - 46 1 Remove the ribbon cable from connector CN5 on the main board. 2 Move the carrier assembly toward the right side of the carrier until the assembly is lined up with the right edge of the board. (...)

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