Ricoh FT 4215 Service Manual
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Ricoh FT 4215 Service Manual

Ricoh FT 4215 Service Manual

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A128 COPIER
SERVICE MANUAL

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  • Page 1 A128 COPIER SERVICE MANUAL...

  • Page 2: Specifications

    31 March 1994 SPECIFICATIONS 1. SPECIFICATIONS Configuration: Desk top Copy Process: Dry electrostatic transfer system Originals: Sheet/Book, object Original Size: Maximum: A3, 11" x 17" Copy Paper Size: Maximum: A3, 11" x 17" Minimum: A6, 5 " x 8 " (lengthwise) Copy Paper Weight: 52 to 157 g/m (14 to 42 lb)
  • Page 3 SPECIFICATIONS 31 March 1994 Energy Saver Function: Reduces electricity consumption (Manual or manual/auto) Paper Capacity: Cassettes: 500 sheets (A4, 8 " x 11") 250 sheets (A3, 11" x 17") Manual feed table: 50 sheets Toner Replenishment: Black: Cartridge exchange (370g/cartridge) Color (red, blue, &...
  • Page 4 31 March 1994 SPECIFICATIONS Dimensions: Width Depth Height Copier only 672 mm (1130 mm)* 600 mm 363 mm (417 mm)* (1255 mm)** 23.7" 14.1" (16.4")* 26.5" (44.5")* (49.4")** Full system 1274 mm 600 mm 466 mm 49.1" 23.7" 18.3" )* : When the A4 cassette and platen cover are installed and the copy tray is extended.

  • Page 5: Copy Processes Around The Drum

    COPY PROCESSES AROUND THE DRUM 31 March 1994 2. COPY PROCESSES AROUND THE DRUM 2. EXPOSURE 1. DRUM CHARGE 3. ERASE 9. QUENCHING 4. DEVELOPMENT 8. CLEANING 5. PRE-TRANSFER LAMP (PTL) 7. PAPER 6. IMAGE TRANSFER SEPARATION CLEANING The cleaning blade removes any toner remaining on the drum. (A cleaning brush is not used in the A128 copier).

  • Page 6: Mechanical Component Layout

    31 March 1994 MECHANICAL COMPONENT LAYOUT 3. MECHANICAL COMPONENT LAYOUT 10 11 12 13 14 1. Third Mirror 16. 1st Feed Roller 2. Second Mirror 17. Manual Feed Table 3. First Mirror 18. Pick-up Roller 4. Exposure Lamp 19. Separation Roller 5.

  • Page 7: Drive Layout

    DRIVE LAYOUT 31 March 1994 4. DRIVE LAYOUT BP2 G16 G18 G22 G23 G24 G1: Main Motor Gear G20: Relay Gear G21: Cleaning Drive Cleaning G2: Relay Gear G18: Relay Gear G3: Timing Belt Drive G19: Drum Drive Gear G22: Relay Gear Gear Drum Fusing and Exit Section...
  • Page 8 31 March 1994 DRIVE LAYOUT Paper Feed Section BP3: Timing Belt Pulley G11: Registration CL G4: Relay Gear Gear G5: Relay Gear Registration CL Registration Roller Paper Feed CL G6: 1st Paper Feed CL Gear G7: Relay Gear Paper Feed Gear G8: Paper Lift CL Gear Paper Feed Rollers Paper Lift CL...

  • Page 9: Electrical Component Layout

    ELECTRICAL COMPONENT LAYOUT 31 March 1994 5. ELECTRICAL COMPONENT LAYOUT 1. Scanner H.P. Sensor 17. Paper End Sensor 2. Lens H.P. Sensor 18. Paper Lift Sensor 3. Scanner Motor 19. Registration Sensor 4. Main Motor 20. Total Counter 5. Development Clutch Solenoid 21.
  • Page 10 31 March 1994 ELECTRICAL COMPONENT LAYOUT 32. Operation Panel Board 41. Option Transformer 33. Optics Thermoswitch 42. Main Transformer 34. Exposure Lamp 43. AC Drive Board 35. Cover Safety Switch 44. Main Motor Capacitor 36. Main Switch 45. Main Board 37.

  • Page 11: Electrical Component Descriptions

    ELECTRICAL COMPONENT DESCRIPTIONS 31 March 1994 6. ELECTRICAL COMPONENT DESCRIPTIONS Symbol Name Function Index No. Motors Main Motor Drives all the main unit components except for the optics unit and fans. (115/220/230/240 Vac) Scanner Motor Drives the scanners (1st and 2nd). (dc stepper) Lens Motor Positions the lens according to the selected...
  • Page 12 31 March 1994 ELECTRICAL COMPONENT DESCRIPTIONS Symbol Name Function Index No. Sensors Scanner Home Informs the CPU when the 1st scanner is at Position Sensor the home position. Lens Home Informs the CPU when the lens is at the Position Sensor home position (full size position).
  • Page 13 ELECTRICAL COMPONENT DESCRIPTIONS 31 March 1994 Symbol Name Function Index No. Erase Lamp Discharge the drum outside of the image area. Provides leading/trailing edge, side and editing erases. Pre-transfer Lamp Reduces charge on the drum surface before transfer. Power Packs CC/Grid/Bias Provides high voltage for the charge corona, Power Pack...
  • Page 14 31 March 1994 AC POWER AND DC POWER DISTRIBUTION 7. AC POWER AND DC POWER DISTRIBUTION AC Power (115V or 220/230/240V) Anti-condensation Heater Main SW - Drum - Optics (Option) Cover Safety SW Scan FU401 Operation Panel Board Signal 24V (VA) 5V (VC) Power Relay Sensors/Switches...
  • Page 15 AC POWER AND DC POWER DISTRIBUTION 31 March 1994 When this copier is plugged in and the main switch is turned off, ac power is supplied via the ac drive board to the anti-condensation heater. When the front cover and/or the exit cover is open, the cover safety switch completely cuts off power to all ac and dc components.
  • Page 16 31 March 1994 AC POWER AND DC POWER DISTRIBUTION When the Start key is pressed, the main board energizes the main motor relay (RA402). Then, the main motor and the quenching lamp turn on and the exhaust blower starts rotating at high speed. When the main switch is turned off, power is cut off to the main board and to RA401, and the drum and optional anticondensation heaters are turned on.

  • Page 17: Detailed Section Descriptions

    DETAILED SECTION DESCRIPTIONS 31 March 1994 8. DETAILED SECTION DESCRIPTIONS 8.1 DRUM CLEANING 8.1.1 Overview The cleaning blade [A] removes any toner remaining on the drum [B] after the image is transferred to the paper. The removed toner falls into the cleaning unit. The toner collection roller [C] carries the used toner to the used toner tank.
  • Page 18 31 March 1994 DETAILED SECTION DESCRIPTIONS 8.1.2 Drive Mechanism The rotation of the main motor is transmitted to the cleaning unit through the main motor gear [A], the relay gear [B], and the cleaning drive gear [C]. The gear [D] driven by the cleaning drive gear passes the rotation to the toner collection roller gear [E].

  • Page 19: Paper Feed And Misfeed Detection Timing

    DETAILED SECTION DESCRIPTIONS 31 March 1994 8.2 PAPER FEED AND MISFEED DETECTION TIMING 1500 2000 2500 3000 3500 4000 Timing Pulse (4 ms/pulse) 400 ms Start Key Main Motor 1750 1750 1750 1st Feed Clutch 1877 1877 2273 (A4 S) 2273 (A4 S) 1877 2285 (LT S)

  • Page 20: Installation Requirements

    31 March 1994 INSTALLATION REQUIREMENTS 9. INSTALLATION REQUIREMENTS 9.1 MINIMUM SPACE REQUIREMENTS 10 cm 15 cm 60 cm 60 cm 30 cm 30 cm 70 cm 70 cm 30 cm 1. Front: 70 cm (27.6") 2. Back: 10 cm (3.9") : 15 cm (6.0") (when the sorter is installed.) 3.

  • Page 21: Installation Procedure

    INSTALLATION REQUIREMENTS 31 March 1994 9.3 INSTALLATION PROCEDURE 9.3.1 Introduction The following table shows which options can be used on A110/A111 and A128 copiers. A110 copier A111 copier A128 copier Document Feeder A318 A318 A318 Sorter A490 A490 A490 Duplex Unit A491 A491 NOTE 1...
  • Page 22 31 March 1994 INSTALLATION REQUIREMENTS 9.3.2 Copier Installation Accessory check Check the quantity and condition of the accessories in the box according to the following list: 1. Receiving Tray..........1 pc 2. Cassette - Small ...........1 pc 3. Cassette - Large ...........1 pc 4.
  • Page 23 INSTALLATION REQUIREMENTS 31 March 1994 1. Remove the strips of tape [A] from the copier at the locations shown. 2. Open the front cover [B], and remove the strips of tape [C] as shown. 3. Do steps 5 to 19 of the A110/A111 copier installation procedure. However, skip steps 14 and 18 (page 3-5 to 9).
  • Page 24 31 March 1994 INSTALLATION REQUIREMENTS 9.3.3 DC Power Supply Unit Installation (Option) 1. Do steps 1 to 2 of the installation procedure for the A110/A111 copier (page 3-16). 2. Install the locking support [A] on the bracket as shown in figure. 3.
  • Page 25 INSTALLATION REQUIREMENTS 31 March 1994 9.3.4 Document feeder Installation (Option) 1. Install the power supply unit. 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 4) Rear cover [D] (4 screws)
  • Page 26 31 March 1994 INSTALLATION REQUIREMENTS 9.3.5 Sorter Installation (Option) 1. Do steps 1 to 5 of the installation procedure for the A110/A111 copier (page 13 of the section for the sorter). 2. Install the magnet catch [A] on the exit unit [B] (2 screws). NOTE: When installing the magnet catch [A] for the A128 copier, be sure to use the two tapping screws included in the plastic bag which is located on the inner side of the rear cover.

  • Page 27: Service Tables

    SERVICE TABLES 31 March 1994 10. SERVICE TABLES 10.1 SERVICE REMARKS 10.1.1 Drum and Drum unit After installing a new drum, be sure to apply setting powder to the entire surface of the drum. 10.1.2 Cleaning Unit After installing a new cleaning blade, be sure to apply setting powder evenly on the surface of the blade.
  • Page 28 31 March 1994 SERVICE TABLES 10.3 MISFEED LOCATION INDICATOR The A128 copier has only B, C, D and F misfeed location indicators on the operation panel. 10.4 CONNECTOR NUMBER CROSS REFERENCE The connector number cross reference table here gives only brief information.
  • Page 29 SERVICE TABLES 31 March 1994 A110 copier A128 copier Destination/Signal Main board (PCB1) (Continued) CN126 CN126 Sorter main board CN127 CN127 Key counter CN128 CN120 Pick-up roller release SOL (SOL2) CN129 CN121 Total counter CN130-1 Not exist Operation panel board (PCB4) CN130-2 to 13 CN122-1 to 12 Operation panel board (PCB4)

  • Page 30: Dip Switches

    31 March 1994 SERVICE TABLES A110 copier A128 copier Destination/Signal AC Drive Board (PCB2) (Continued) T405 T406 Fusing lamp (L2) T406 T405 Fusing thermofuse (TF) T407 T407 AC input Power Supply Board (PCB3) CN100-1 to 4 CN100-1 to 4 Main transformer (TR1) CN100-5 to 6 Not exist Main transformer (TR1)

  • Page 31: Replacement And Adjustment

    REPLACEMENT AND ADJUSTMENT 31 March 1994 11. REPLACEMENT AND ADJUSTMENT 11.1 INNER COVER REMOVAL 11.1.1 Right Inner Cover 1. Open and remove the front cover. 2. Remove the development unit. 3. Remove the lower front cover [A] (2 screws). 4. Remove the registration knob [B] and paper guide release lever [C] (1 screw each).

  • Page 32: Cleaning Blade Replacement

    31 March 1994 REPLACEMENT AND ADJUSTMENT 11.2 CLEANING BLADE REPLACEMENT 1. Remove the cleaning unit [A]. (See Cleaning Unit Removal of the A110/A111 copier.) 2. Remove the cleaning blade [B] (1 screw). NOTE: a) Do not touch the edge of a new cleaning blade, as it is damaged easily.

  • Page 33: Entrance Seal Replacement

    REPLACEMENT AND ADJUSTMENT 31 March 1994 11.3 ENTRANCE SEAL REPLACEMENT 1.5±0.5mm 1. Remove the cleaning unit and cleaning blade. (See Cleaning Blade Removal.) 2. Remove the used toner. (See Used Toner Collection of the A110/A111 copier.) 3. Clean the cleaning unit with a vacuum cleaner. 4.
  • Page 34 31 March 1994 REPLACEMENT AND ADJUSTMENT 6. Place new strip of 2 sided tape [F] on the lower casing surface as shown in the illustration. The side edge [G] of the tape must be flush with the edge [H] of the lower casing and the lower edge [I] of the tape must be flush with the edge [J] of the projection of the lower casing as shown in the illustration.

  • Page 35: Registration Clutch Replacement

    REPLACEMENT AND ADJUSTMENT 31 March 1994 11.4 REGISTRATION CLUTCH REPLACEMENT 1. Turn off the main switch. 2. Remove the rear cover. 3. Remove the main board (1 screw, 4 locking supports, and all connectors). 4. Replace the registration clutch [A] (1-E ring). NOTE: When reinstalling a new registration clutch, make sure that the stopper bracket locks the registration clutch as shown.
  • Page 36 31 March 1994 REPLACEMENT AND ADJUSTMENT 11.5 REGISTRATION SENSOR AND ROLLER REPLACEMENT 1. Turn off the main switch. 2. Remove the following parts: • Front cover (See Exterior Cover Removal of the A110/A111 copier.) • Development unit • Right inner cover (See Inner Cover Removal.) •...
  • Page 37 REPLACEMENT AND ADJUSTMENT 31 March 1994 – Registration Rollers – 6. Remove the registration clutch. (See Registration Clutch Replacement.) 7. Remove the front and rear holders [A] (1 screw, pressure spring, and E-ring each) of the upper registration roller. 8. Replace the upper registration roller [B]. 9.
  • Page 38 31 March 1994 REPLACEMENT AND ADJUSTMENT – Sensor – 12. Remove the upper registration roller. (See registration roller replacement.) 13. Replace the sensor [A] (1 connector).

  • Page 39: Drum Replacement

    REPLACEMENT AND ADJUSTMENT 31 March 1994 11.6 DRUM REPLACEMENT CAUTION: When replacing the drum, do not loosen the paint locked screws [A]. The drum position is set with a special tool, and instruments at the factory to ensure the proper gap between the drum and the development unit.
  • Page 40 31 March 1994 REPLACEMENT AND ADJUSTMENT 6. Remove the bearing [A] (1 screw [B]) from the old drum and install them on the the new drum. Do not remove the protective sheet from the new drum. 7. Set the OPC drum in the unit and put the bearing holder [C] back in place.

  • Page 41: Hot Roller Replacement

    REPLACEMENT AND ADJUSTMENT 31 March 1994 11.7 HOT ROLLER REPLACEMENT 1. Remove the exit unit. (See Exit Unit Removal of the A110/A111 copier.) 2. Remove the fusing lamp. (See Fusing Lamp Replacement of the A110/A111 copier.) 3. Remove the exit paper guide (1 screw). 4.
  • Page 42 31 March 1994 REPLACEMENT AND ADJUSTMENT [E] [C] – Reinstallation – 1. Place the spacer [A] on the rear end of the shaft. 2. Set the rear bearing [B] on the rear frame. 3. Insert the rear end of the hot roller shaft through the rear bearing. 4.

  • Page 43: Ozone Filter Replacement

    REPLACEMENT AND ADJUSTMENT 31 March 1994 11.8 OZONE FILTER REPLACEMENT 1. Open the exit unit. 2. Remove the front and the rear support screws [A]. 3. Replace the ozone filter [B].

  • Page 44: 4Th/5Th Mirror Height Adjustment

    31 March 1994 REPLACEMENT AND ADJUSTMENT 11.9 4TH/5TH MIRROR HEIGHT ADJUSTMENT When: Parallelogram (skewed) image appears. Purpose: To maintain the proper copy image. Measure: Turn 4th/5th mirror height adjustment screw. How: Changes the 4th/5th mirror height. CAUTION: Never perform this adjustment until you have positively verified that the source of the skewing is optical and not in the paper path.

  • Page 45: Troubleshooting

    TROUBLESHOOTING 31 March 1994 12. TROUBLESHOOTING The A128 copier has the same troubleshooting procedure as that of the A110/A111 copier. However, some connector numbers are different from those of the A110/A111 copier. Refer to the connector number cross reference table on page 27 to 29 of the A128 copier service manual. NOTE: The A128 copier has the same voltage scanner motor drive signals as the A111 copier.

This manual is also suitable for:

A110A111A128

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