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Ricoh A318 Service Manual

Document feeder
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DOCUMENT FEEDER

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Summary of Contents for Ricoh A318

  • Page 1 DOCUMENT FEEDER...

  • Page 2: Specifications

    1 May 1993 SPECIFICATIONS 1. SPECIFICATIONS Original Size and Weight: – Thin original mode – Maximum A3/11" x 17" Minimum B6/5 " x 8 " Weight 41 to 128 g/m (11 to 34 lb) – Thick original mode – Maximum A3 / 11"...

  • Page 3: Component Layout

    COMPONENT LAYOUT 1 May 1993 2. COMPONENT LAYOUT – Mechanical Components – 1. Pulse Generator Disk 6. Inverter Pawl 2. Friction Belt 7. Inverter Roller 3. Pick-up Lever 8. Transport Belt 4. Original Table 9. Pick-up Roller 5. Exit Roller 10.

  • Page 4: Electrical Component Descriptions

    1 May 1993 ELECTRICAL COMPONENT DESCRIPTIONS 3. ELECTRICAL COMPONENT DESCRIPTIONS Symbol Name Function Index No. Motors Belt Drive Motor DC servomotor that drives to the transport belt and feed-in system (pick-up roller, feed roller, pull-out roller and relay roller). Feed-out Motor DC servomotor that drives the feed-out unit of the DF.

  • Page 5: Overall Machine Control

    OVERALL MACHINE CONTROL 1 May 1993 4. OVERALL MACHINE CONTROL Copier Main Board (PCB1) DF Main Board (PCB1) Sensors Switches Solenoids Indicators Driver Belt Drive Motor Feed-out Driver Motor The DF CPU monitors the input signals from the sensors and switches, and energizes the solenoids and the indicator LEDs directly.
  • Page 6 31 October 1995 OVERALL MACHINE CONTROL → 1. D F Copier Sig nal Name De f inition Original Set Originals have been set on the original table Copy Start Allows the copier to start the copy sequence Lift Up The DF has been lifted DF Misfeed A misfeed has occurred in the DF →...

  • Page 7: Basic Operation

    BASIC OPERATION 1 May 1993 5. BASIC OPERATION 1. One-sided Original Feed When an original is inserted face up into the DF, the Insert Original indicator light goes out and the DF informs the copier CPU that originals have been set. When the Start key is pressed, the copier CPU sends the feed-in signal to the DF.
  • Page 8 1 May 1993 BASIC OPERATION 2. Two-sided Original Feed Unlike one-sided original feed, the back side of the original must be copied first to keep the originals and copies in the correct order. During original feed-in, the sequence is the same as for one-sided feed; however, the DF CPU also energizes the inverter motor and the inverter solenoid a short time after the original trailing edge has passed the DF registration sensor.

  • Page 9: Power Distribution

    POWER DISTRIBUTION 1 May 1993 6. POWER DISTRIBUTION 6.1 A110/A054 COPIERS +12V +24V Option DC Option 115Vac +24V (VA) Regulator AC Drive 26Vac Power Supply Transformer Board Board (TR2) (PCB2) (PCB6) 220/230/240Vac +5V (VC) 10Vac DF Main Board (PCB1) The DF uses three DC power levels: +24 volts, +12 volts, and +5 volts. When the main switch is turned on, the option transformer receives the wall outlet ac power through the ac drive board and outputs 10 volts ac and 26 volts ac to the option dc power supply board.
  • Page 10 1 May 1993 POWER DISTRIBUTION 6.2 A111 COPIER +24V +12V Main +24V (VA) Main DC 115Vac +24V (VA) Regulator AC Drive Copier 31Vac Transformer Power Board Main (TR1) Supply (PCB2) Board Board (PCB1) (PCB3) 220/230/240Vac +5V (VC) +5V (VC) 10Vac DF Main Board (PCB1) The DF uses three dc power levels: +24 volts, +12 volts, and +5 volts.

  • Page 11: Original Feed

    ORIGINAL FEED 1 May 1993 7. ORIGINAL FEED 7.1 ORIGINAL PICK-UP After setting the originals on the original table, the originals contact the feeler [A] of the original set sensor and cause the feeler to move out of the sensor. The DF then sends the original set signal to the copier CPU to inform it that the DF will be used.

  • Page 12: Original Separation

    1 May 1993 ORIGINAL FEED 7.2 ORIGINAL SEPARATION The feed roller [A] and the friction belt [B] are used to feed-in and separate the originals [C]. Only the bottom original is fed because the friction belt prevents any other originals from feeding. Original feed starts when the feed roller starts turning and advances the bottom original of the stack.

  • Page 13: Original Feed-In Mechanism

    ORIGINAL FEED 1 May 1993 7.3 ORIGINAL FEED-IN MECHANISM The belt drive motor [A] drives the pick-up roller [B], the feed roller [C], the pull out roller [D], the relay roller [E], and transport belt [F] via a feed clutch and a gear train.
  • Page 14 1 May 1993 ORIGINAL FEED This document feeder has two different ways of stopping originals at the correct position on the exposure glass. They are called the "thin original mode" and the "thick original mode". The mode used is determined by the original select switch [A].

  • Page 15: Original Size Detection

    ORIGINAL FEED 1 May 1993 7.4 ORIGINAL SIZE DETECTION The DF determines original size (both width and length) through the use of the original width sensor [A], registration sensor, and pulse generator sensor [B]. The original’s length is calculated by counting the number of pulses from the pulse generator while the registration sensor is on.

  • Page 16: Original Inversion Mechanism

    1 May 1993 ORIGINAL FEED 7.5 ORIGINAL INVERSION MECHANISM The two sided originals are inverted in the feed-out unit. 1) When the copier Start key is pressed, the two sided original is fed into the feed-in unit, passing over the DF registration sensor [A]. The feed-out motor [B] and the inverter solenoid [C] turn on 100 milliseconds after the original trailing edge passes the registration sensor.
  • Page 17 ORIGINAL FEED 1 May 1993 2) 4) 3) 5) 2) The original passes over the exposure glass and feeds into the feed-out unit. 3) The original is directed onto the exposure glass again by the inverter pawls. The belt drive motor now reverses 140 milliseconds after the feed out sensor [E] turns on.

  • Page 18: Original Feed-Out Mechanism

    1 May 1993 ORIGINAL FEED 7.6 ORIGINAL FEED-OUT MECHANISM The exit rollers [A] are driven by the inverter motor [B]. When the document feeder receives the feed out signal from the copier, the transport belt and the exit rollers start turning simultaneously. The transport belt carries the original to the inverter rollers [C] and the exit rollers take over the original feed-out.
  • Page 19 ORIGINAL FEED 1 May 1993 7.7 BELT DRIVE MOTOR CIRCUIT DF Main Board (PCB 1) Speed CN102-1 Data Driver Driver Circuit Belt Drive Motor ON/OFF CN102-2 Forward/ Reverse CN103-1 Phase A CN103-2 Encoder Phase B CN103-3 CN103-4 A dc servomotor is used as the belt drive motor. The driver IC controls the speed of the belt drive motor.

  • Page 20: Feed-Out Motor Circuit

    1 May 1993 ORIGINAL FEED 7.8 FEED-OUT MOTOR CIRCUIT DF Main Board (PCB 1) CN104-A2 AC Feedback CN104-A15 Voltage Regulation CN104-B8 Motor Driver Feed-out Drive CN104-A12 High/Low Motor Circuit ON/OFF The DF CPU sends the speed data (high or low) to the driver IC and the motor drive circuit.

  • Page 21: Input And Output Circuits

    ORIGINAL FEED 1 May 1993 7.9 INPUT AND OUTPUT CIRCUITS DF Main Board (PCB1) Original Set Sensor Lift SW (SW1) CN104-B1 CN104-A10 CN104-B9 [ 12] [ 12] CN104-A17 CN104-B15 Pulse Generator Sensor CN104-B2 CN104-B6 CN104-A9 +24V [0-12] Pick-up CN104-B17 CN104-A3 [ 24] Registration Sensor CN104-A6...

  • Page 22: Lift Mechanism

    1 May 1993 LIFT MECHANISM 8. LIFT MECHANISM When the document feeder is opened, the lift springs [D] provide enough force to ensure that the document feeder does not fall onto the exposure glass. When the document feeder is closed, points "A", "B", and "C" are aligned and no such force is provided to the document feeder.

  • Page 23: Original Misfeed Sensing

    ORIGINAL MISFEED SENSING 1 May 1993 9. ORIGINAL MISFEED SENSING The registration sensor and the feed-out sensor are used for misfeed checks. 1. One sided original Registration Sensor ON check (685 ms) OFF check (1250 ms) Feed-out Sensor ON check (1250 ms) OFF check (1250 ms) Belt Drive Motor Feed-out Motor...
  • Page 24 1 May 1993 ORIGINAL MISFEED SENSING 2. Two sided original Registration Sensor (RS) RS ON check (685 ms) RS OFF check (1250 ms) Feed-out Sensor (FS) 100 ms FS OFF check (1250 ms) FS ON check (1250 ms) Inverter Solenoid Forward Belt Drive Motor Reverse...

  • Page 25: Installation Procedure

    INSTALLATION PROCEDURE (for Machine Code: A110/A111) 1 May 1993 10. INSTALLATION PROCEDURE (for Machine Code: A110/A111) 10.1 ACCESSORY CHECK [6] [7] [10] [19] [11] [12] [13] [14] [15] [16] [17] [18] Check the accessories and their quantities according to the following list: 1.
  • Page 26 1 May 1993 INSTALLATION PROCEDURE (for Machine Code: A110/A111) [22] [21] [20] [23] [24] [25] [26] [27] 20. Philips Pan Head Screw - M5 x 10 (for A030/A072) .......2 pcs 21. DF Mounting Bracket (for A030/A072) ..........1 pc 22. DF Bracket (for A030/A072) ............1 pc 23.
  • Page 27 INSTALLATION PROCEDURE (for Machine Code: A110/A111) 1 May 1993 "X" "Y" "Z" NOTE: 1. Connector (3P/Brown) [A] on the DC harness assembly is not used on the A027, A030, A048, A075 and A110 Copiers. 2. The clamp position of the DF harness with the bushing or clamp is different for each machine as follows: "X"...
  • Page 28 1 May 1993 INSTALLATION PROCEDURE (for Machine Code: A110/A111) 10.2 INSTALLATION PROCEDURE 1. Install the power supply unit (A110 copier only). Refer to the installation procedure enclosed with the power supply unit (A525). 2. Remove the following parts from the copier. 1) Platen cover [A] (2 push-locks) 2) Platen cover pedestal [B] (4 screws) 3) 2 screws [C] for fixing the operation panel...
  • Page 29 INSTALLATION PROCEDURE (for Machine Code: A110/A111) 1 May 1993 "a" 6. Secure the DF mounting bracket [A] (4 screws [12]). 7. Adjust the height of the DF mounting bracket in the following order: 1) Set the E plate [B] on the exposure glass as shown and measure the clearance "a"...
  • Page 30 1 May 1993 INSTALLATION PROCEDURE (for Machine Code: A110/A111) 9. Mount the DF on the DF mounting bracket aligning the holes in the DF and the pins on the mounting bracket, then slide the DF to the left as shown. 10.
  • Page 31 INSTALLATION PROCEDURE (for Machine Code: A110/A111) 1 May 1993 [A111 copier] [A110 copier] 14. Set the clamp [A] between the last two binders [B] of the DF harness [C] as shown (1 screw [27]). 15. Connect the optics fiber cable connector (2P/Black) [D] to CN133 on the main board [E].
  • Page 32 1 May 1993 INSTALLATION PROCEDURE (for Machine Code: A110/A111) [A110 copier] 20. Connect the harness connector [A] to CN102 on the dc power supply unit (A110 copier only). 21. Clamp the optional harness [B] as shown (A110 copier only). 22. Remove the DF main PCB cover [C] and turn off DIP switch 101-2. NOTE: Make sure that DIP switch 101-1 is on and the other switches (101-2, 3 and 4) are off.
  • Page 33 INSTALLATION PROCEDURE (for Machine Code: A110/A111) 1 May 1993 25. Adjust the height of the magnet catches in the following order: 1) Remove the grip cover [A] (3 screws) 2) Loosen the screws of the magnet catches [B] (2 screws each) 3) Close the document feeder and tighten the screws of the magnet catches when the rubber stopper [C] contacts the exposure glass.
  • Page 34 1 May 1993 INSTALLATION PROCEDURE (for Machine Code: A110/A111) Original Registration Adjustment 1. Make a copy of the test sheet in the platen mode (A4 width). 2. Confirm that the original select switch is in the thin original mode and make a copy in DF mode (A4 width).
  • Page 35 INSTALLATION PROCEDURE 31 October 1995 9. INSTALLATION PROCEDURE 9.1 ACCESSORY CHECK [6] [7] [10] [19] [11] [12] [13] [14] [15] [16] [17] [18] A318I500.img Check the accessories and their quantities against the following list: 1. Original Table ..................1 pc 2. DF Mounting Bracket...............1 pc 3.
  • Page 36 31 October 1995 INSTALLATION PROCEDURE [22] [21] [20] [23] [24] [25] [26] [27] A318I501.img 20. Philips Pan Head Screw - M5 x 10 (not used).........2 pcs 21. DF Mounting Bracket (not used) .............1 pc 22. DF Bracket (not used) ..............1 pc 23.
  • Page 37 INSTALLATION PROCEDURE 31 October 1995 A318I502.img NOTE: Connector (3P/Brown) [A] on the DC harness assembly is not used with the A173 copier.
  • Page 38 31 October 1995 INSTALLATION PROCEDURE 9.2 INSTALLATION PROCEDURE A318I504.img A318503.wmf "a" A318I505.img A318I506.img A318I507.img CAUTION Before installing the DF, check that the power cord is unplugged. 1. Remove the platen cover [A] (4 screws). 2. Remove the rear cover (4 screws) and the right cover (4 screws). 3.
  • Page 39 INSTALLATION PROCEDURE 31 October 1995 A318I508.img A318I509.img 6. Mount the DF on the DF mounting bracket, aligning the holes in the DF and the pins on the mounting bracket, then slide the DF to the left as shown. 7. Secure the DF to the DF mounting bracket (4 screws [13] in the accessories list).
  • Page 40 31 October 1995 INSTALLATION PROCEDURE A318I510.wmf 9. Attach the clamp [A] as shown (1 screw [27] in the accessories list). 10. Install the DF interface board [B] on the main board (2 studs [C] and 4 screws). 11. Connect the optics fiber cable connector (2P/Black) [D] and the dc harness connector [E] to the DF interface board.
  • Page 41 INSTALLATION PROCEDURE 31 October 1995 A318I511.img A318I512.img 13. Remove the DF main PCB cover [A] and turn off DIP switch 101-2. NOTE: Make sure that DIP switch 101-1 is on and the other switches (101-2, 3 and 4) are off. 14.
  • Page 42 31 October 1995 INSTALLATION PROCEDURE A318I513.img A318I514.img 16. Adjust the height of the magnet catches in the following order: 1) Remove the grip cover [A] (3 screws). 2) Loosen the screws of the magnet catches [B] (2 screws each). 3) Close the document feeder and tighten the screws of the magnet catches when the rubber stopper [C] contacts the exposure glass.
  • Page 43 INSTALLATION PROCEDURE 31 October 1995 A318I515.wmf Original Registration Adjustment 1. Make a copy of the test sheet in the platen mode (A4 width). 2. Confirm that the original select switch is in the thin original mode and make a copy in DF mode (A4 width). 3.

  • Page 44: Accessory Check

    1 December 1990 11. INSTALLATION PROCEDURE (for Machine Code: A048) 11.1 ACCESSORY CHECK Check the quantity and condition of the accessories in the box according to the following list: 1. Original Table ................ 1 2. DF Mounting Bracket ............. 1 3.
  • Page 45 1 December 1990 11.2 INSTALLATION PROCEDURE 1. Install the dc power supply unit. 2. Remove the following parts from the copier: 1) Platen cover [A] (2 push-locks) 2) Platen cover pedestal [B] (4 screws) 3) 2 screws [C] for fixing the operation panel. 3.
  • Page 46 1 December 1990 4. Secure the DF mounting bracket [A] (4 screws). 5. Adjust the height of the DF mounting bracket as explained below: 1) Set the E plate [B] on the exposure glass as shown and measure the clearance "a" between the DF mounting bracket and the E plate with a scale.
  • Page 47 1 December 1990 7. Mount the DF on the DF mounting bracket so that the holes in the DF are aligned with the pins on the mounting bracket, then slide the DF to the left as shown. 8. Secure the DF to the DF mounting bracket (4 screws). 9.
  • Page 48 1 December 1990 13. Connect the optic cable connector (2P/Black) [A] to CN206 on the inter- face board. 14. Connect the dc harness (4P/White) [B] to the optional harness connector [C]; then, connect the optional harness connector [D] to CN102 on the dc power supply unit.
  • Page 49 1 December 1990 DIP SW101 18. Adjust the height of the magnet catches as follows: 1) Remove the grip cover [A] (3 screws). 2) Loosen the screws of the magnet catches [B] (2 screws for each catch). 3) Close the document feeder and tighten the screws of the magnet catches when the rubber stopper [C] contacts the exposure glass.
  • Page 50 1 December 1990 5) Make a copy of the test sheet in DF two-sided original mode. NOTE: 1. The test sheet must be set facedown. 2. The original select switch can be set at any position. 6) Compare the registration of the copy in platen mode with that of DF two-sided original mode, and confirm that the difference is within 2.0 7) If the difference is more than 2.0 mm, remove the DF main PCB cover and adjust VR103 to change the original-stop timing.
  • Page 51 20 December 1991 INSTALLATION PROCEDURE (for Machine Code: A072) 8. INSTALLATION PROCEDURE (for Machine Code: A072) 8.1 ACCESSORY CHECK [5] [6] [17] [10] [11] [12] [13] [14] [15] [16] Check the accessories and their quantities according to the following list: 1.
  • Page 52 INSTALLATION PROCEDURE (for Machine Code: A072) 20 December 1991 [20] [19] [18] [21] [22] [23] [24] [25] [26] [27] 18. Philips Pan Head Screw - M5 x 10 (for A030).........2 pcs 19. DF Mounting Bracket (for A030/A072) ..........1 pc 20. DF Bracket (for A030)..............1 pc 21.
  • Page 53 20 December 1991 INSTALLATION PROCEDURE (for Machine Code: A072) 8.2 INSTALLATION PROCEDURE (for Machine Code: A072) CAUTION: When installing the DF, make sure that the copier is unplugged. 1. Remove the following parts of the copier. 1) Plate cover [A] (2 push-locks) NOTE: Use a minus (slotted) screw driver to lift up the leaf spring [B] as shown.
  • Page 54 INSTALLATION PROCEDURE (for Machine Code: A072) 20 December 1991 5. Secure the DF mounting bracket [A] (2 screws - M5 x 12 [25]). NOTE: Use the screws - M5 x 10 for A030 copier. 6. Adjust the height of the DF mounting bracket in the following order: 1) Set the E plate [B] on the exposure glass as shown and measure the clearance "a"...
  • Page 55 20 December 1991 INSTALLATION PROCEDURE (for Machine Code: A072) 7. Mount the DF on the DF mounting bracket by aligning the holes in the DF and the pins [A] on the mounting bracket, them slide the DF to the left as shown.
  • Page 56 INSTALLATION PROCEDURE (for Machine Code: A072) 20 December 1991 CAUTION: During this step, avoid bending the fiber optics sharply. This will damage them. 12. Set the clamp [A] to the harness (see illustration for location) and set it to the copier’s accessory bracket [B] (1 screw [27]). 13.
  • Page 57 20 December 1991 INSTALLATION PROCEDURE (for Machine Code: A072) 17. Install the angle stopper [A] (2 screws) and the original table [B].
  • Page 58 INSTALLATION PROCEDURE (for Machine Code: A072) 20 December 1991 18. Adjust the height of the magnet catches in the following order: 1) Remove the grip cover [A] (3 screws). 2) Loosen the screws of the magnet catches [B] (2 screws each). 3) Close the document feeder and tighten the screws of the magnet catches when the rubber stopper [C] contacts the exposure glass.
  • Page 59 20 December 1991 INSTALLATION PROCEDURE (for Machine Code: A072) ORIGINAL REGISTRATION ADJUSTMENT 1. Make a copy of the test sheet in the platen mode (A4/8 " x 11" Sideways). 2. Confirm that the original select switch is in the thin original mode and make a copy in DF mode (A4/8 "...

  • Page 60: Preparation For Transportation

    PREPARATION FOR TRANSPORTATION 1 May 1993 11. PREPARATION FOR TRANSPORTATION CAUTION: Before moving the document feeder, be sure to prepare it for transportation as follows. The document feeder may be badly damaged if it is moved without proper preparation. 1. Remove the original table [A]. 2.

  • Page 61: Replacement And Adjustment

    1 May 1993 REPLACEMENT AND ADJUSTMENT 12. REPLACEMENT AND ADJUSTMENT 12.1 FEED-IN UNIT 12.1.1 Transport Belt Replacement 1. Turn off the main switch and remove the grip [A] (3 screws). 2. Remove the DF main PCB cover [B] (1 screw, 1 connector). 3.
  • Page 62 REPLACEMENT AND ADJUSTMENT 1 May 1993 4. Remove the 2 tension springs [A] and pull off the transport belt [B]. NOTE: a) When installing the transport belt, make sure the belt lies between the belt guide spacers [C]. b) When installing the transport belt assembly, make sure the positioning pin correctly fits in the DF frame, and hold open the exit guide to prevent the mylar strip from becoming damaged.
  • Page 63 1 May 1993 REPLACEMENT AND ADJUSTMENT 12.1.2 Feed-in Unit Removal 1. Turn off the main switch. 2. Remove the transport belt assembly. (See Transport Belt Replacement.) 3. Remove the belt drive motor cover [A] (4 screws). 4. Remove the feed-in unit [B] (4 screws, 8 connectors).
  • Page 64 REPLACEMENT AND ADJUSTMENT 1 May 1993 12.1.3 Pick-up Roller Replacement 1. Turn off the main switch. 2. Remove the feed-in unit. (See Feed-in Unit Removal.) 3. Remove the lower entrance guide [A] (2 screws). 4. Remove the original set sensor assembly [B] (1 screw, 1 connector). 5.
  • Page 65 1 May 1993 REPLACEMENT AND ADJUSTMENT 12.1.4 Feed-in Clutch Lubrication 1. Turn off the main switch. 2. Remove the original set sensor assembly. (See Pick-up Roller Replacement.) 3. Remove the feed-in solenoid lever spring [A]. 4. Remove the pick-up roller assembly [B] (2 E-rings, 2 bushings). 5.
  • Page 66 REPLACEMENT AND ADJUSTMENT 1 May 1993 12.1.5 Pick-up Solenoid Adjustment 1. Turn off the main switch. 2. Place several sheets of paper [A] over the exposure glass area. 3. Lower the feed-in unit (see Feed-in Unit Removal) without disconnecting the eight connectors. 4.
  • Page 67 1 May 1993 REPLACEMENT AND ADJUSTMENT 5. Turn off DPS101-1 and 2, then turn on DPS101-3 and 4 [B]. 6. Loosen the screw fixing the pick-up solenoid [C]. 7. Place the 0.15 mm thickness gauge [D] between the plunger and the solenoid.
  • Page 68 REPLACEMENT AND ADJUSTMENT 1 May 1993 12.1.6 Feed Roller Replacement 1. Turn off the main switch. 2. Remove the lower entrance guide. (See Pick-up Roller Replacement.) 3. Loosen the front bracket [A] (2 screws). 4. Release the feed roller shaft [B] from the front bracket (1 E-ring, 1 bearing).
  • Page 69 1 May 1993 REPLACEMENT AND ADJUSTMENT 12.1.7 Feed-in Solenoid Adjustment 1. Turn off the main switch. 2. Place several sheets of paper [A] over the exposure glass area. 3. Lower the feed-in unit (see Feed-in Unit Removal) without disconnecting the eight connectors. 4.
  • Page 70 REPLACEMENT AND ADJUSTMENT 1 May 1993 12.1.8 Friction Belt Replacement 1. Turn off the main switch. 2. Remove the seal cover [A] on top of the DF cover. 3. Remove the friction belt assembly [B] (1 screw). 4. Remove the friction belt [C] (2 springs, 1 pin). NOTE: a) When installing the friction belt assembly, make sure the friction roller [D] is set in the correct position (see illustration).

  • Page 71: Feed-Out Unit

    1 May 1993 REPLACEMENT AND ADJUSTMENT 12.2 FEED-OUT UNIT 12.2.1 Feed-out Unit Removal 1. Turn off the main switch. 2. Remove the DF grip [A] (3 screws). 3. Remove the feed-out motor cover [B] (4 screws). 4. Remove the feed-out unit [C] (4 screws, 3 connectors).
  • Page 72 REPLACEMENT AND ADJUSTMENT 1 May 1993 12.2.2 Inverter Solenoid Adjustment 1. Turn off the main switch. 2. Place several sheets of paper [A] over the exposure glass area. 3. Lower the feed-out unit (See Feed-out Unit Removal) without disconnecting the three connectors. 4.
  • Page 73 1 May 1993 REPLACEMENT AND ADJUSTMENT 12.2.3 DF Leading Edge Registration Adjustment 1. Using the DF test chart, make a copy in the platen cover mode (A4 width). 2. Confirm that the original select switch [A] is in the thin mode and again using the test chart, make a copy in the DF mode (A4 width).
  • Page 74 REPLACEMENT AND ADJUSTMENT 1 May 1993 12.3 BELT DRIVE MOTOR SPEED ADJUSTMENT Normal Setting NOTE: The belt drive speed adjustment is required when the main board is replaced. 1. Turn off the main switch. 2. Check that DIP switch 101 is set for the normal setting as follows: 101-1 101-2 101-3...
  • Page 75 Document Feeder Electrical Components Index No. Description Symbol P to P Original Set Sensor Registration Sensor Pulse Generator Sensor Original Width Sensor SOL1 Pick-up Solenoid Belt Drive Motor PCB2 Indicator Panel Lift Switch DF Main Board PCB1 C15 — C21 Feed-out Motor Inverter Solenoid SOL3...

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