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Ricoh A183 Service Manual

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A183/A184
SERVICE MANUAL
PN: RCSM2012
RICOH GROUP COMPANIES

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Summary of Contents for Ricoh A183

  • Page 1 ® ® ® ® A183/A184 SERVICE MANUAL PN: RCSM2012 RICOH GROUP COMPANIES...
  • Page 2 ® ® ® RICOH GROUP COMPANIES...
  • Page 3 A183/A184 SERVICE MANUAL PN: RCSM2012...
  • Page 5 WARNING The Service Manual contains information regarding service techniques, procedures, processes and spare parts of office equipment distributed by Ricoh Corporation. Users of this manual should be either service trained or certified by successfully completing a Ricoh Technical Training Program.
  • Page 7 LEGEND PRODUCT CODE COMPANY GESTETNER RICOH SAVIN A183 FT2012 A184 FT2212 DOCUMENTATION HISTORY REV. NO. DATE COMMENTS 9/97 Original Printing...

  • Page 9: Table Of Contents

    5.2 DRIVE MECHANISM ......... . . 2-15 A183/A184...
  • Page 10 10.4 BY-PASS FEED ..........2-36 A183/A184...
  • Page 11 1.7 OTHERS ............4-4 A183/A184...
  • Page 12 2.5 4TH MIRROR REMOVAL ......... 6-9 A183/A184...
  • Page 13 7.1 LIGHT INTENSITY ADJUSTMENT ....... . 6-34 7.1.1 Base Exposure Lamp Voltage Adjustment ..... . . 6-34 A183/A184...
  • Page 14 1.14 UNFUSED COPY IMAGE........7-18 1.15 CREASING PAPER AFTER FUSING ......7-18 A183/A184...
  • Page 15 5. USER CODES......... 7-29 A183/A184...
  • Page 17 IMPORTANT SAFETY NOTICES PREVENTION OF PHYSICAL INJURY 1. Before disassembling or assembling any parts of the copier, make sure that the power cord is unplugged. 2. The wall outlet should be near the copier and easily accessible. 3. If any adjustment or operation check has to be made with exterior covers off or open while the main switch is turned on, keep hands away from electrified or mechanically driven components.
  • Page 19 TAB INDEX FOR A183/A184 OVERALL MACHINE INFORMATION DETAILED DESCRIPTIONS INSTALLATION SERVICE TABLES PREVENTIVE MAINTENANCE REPLACEMENT AND ADJUSTMENT TROUBLESHOOTING...

  • Page 21: Overall Information

    OVERALL MACHINE INFORMATION...

  • Page 23: Specifications

    Desk Top Copy Process: Dry electrostatic transfer system Originals: Sheet/Book Original Size: Maximum: A4/8.5" x 14" (A183 copier) B4/10" x 14" (A184 copier) Copy Paper Size: Paper tray feed: A4, 8.5" x 11", 8.5" x 13", 8.5" x 14" Bypass feed: Maximum: A4/8.5"...
  • Page 24 ISO 7779 at the operator position.) Less than 55 dB Sound power level (the measurements are made according to ISO 7779) Stand-by condition Less than 40 dB Copy cycle condition Less than 63 dB Weight: Less than 18 kg, 39.7 Ib A183/A184...
  • Page 25 SPECIFICATIONS MEMO A183/A184...

  • Page 26: Copy Process Around The Drum

    COPY PROCESS AROUND THE DRUM 2. COPY PROCESS AROUND THE DRUM A184V501.wmf A183/A184...
  • Page 27 At the same time, the copy paper is electrically attracted to the drum surface. 6. CLEANING The cleaning blade scrapes the toner off the drum. The collected toner is recycled. 7. QUENCHING Light from the quenching lamp electrically neutralizes the drum surface. A183/A184...

  • Page 28: Mechanical Component Layout

    6. 6th Mirror 18. Drum 7. Lens 19. Cleaning Blade 8. Erase Lamp 20. Pressure Roller 9. Development Roller 21. Hot Roller 10. 4th Mirror 22. Exit Rollers 11. 5th Mirror 23. Copy Tray 12. By-pass Feed Table 24. 3rd Mirror A183/A184...

  • Page 29: Electrical Component Descriptions

    Scanner H. P. Sensor Informs the CPU when the 1st scanner is at the home position. Toner Density (TD) Detects the ratio of toner to carrier in the Sensor developer. Exit Sensor Detects misfeeds. Solenoid Registration Solenoid Releases the stopper, synchronizing the SOL 1 paper-feed timing with the original scan. A183/A184...
  • Page 30 Fusing Thermistor Monitors the fusing temperature. Exposure Lamp Provide back-up overheat protection around Thermofuse the exposure lamp. Fusing Thermofuse Provide back-up overheat protection in the fusing unit. Transformer Steps down the wall voltage to 30 Vac and 8 Vac. A183/A184...

  • Page 31: Detailed Descriptions

    DETAILED DESCRIPTIONS...

  • Page 33: Drum

    4. Being less sensitive to changes in temperature (when compared to selenium F type drums). 5. During the drums’ life, drum residual voltage gradually increases and the photoconductive surface becomes worn. Therefore, some compensation for these characteristics is required. A183/A184...

  • Page 34: Drive Mechanism

    DRUM 1.2 DRIVE MECHANISM A184D500.wmf The drum [A] is driven by the main motor [B] through idle gears. A183/A184...

  • Page 35: Charge

    An ozone filter [D], which adsorbs ozone (O ) generated by the charge corona, is located beside the exhaust fan. The ozone filter decreases in efficiency over time as it adsorbs ozone. The ozone filter should be replaced every 30 k copies. A183/A184...

  • Page 36: Charge Corona Circuit

    The grid plate is connected to ground through a zener diode in the high voltage supply unit. The grid plate drains any charge in excess of –850 V, which is discharged to the ground through the zener diode. A183/A184...

  • Page 37: Optics

    (See Troubleshooting for details.) In this case, the Start key turns red. Additionally, a thermofuse on the 1st scanner provides back-up overheat protection. It opens when the temperature reaches 128°C and cuts ac power to the exposure lamp. A183/A184...

  • Page 38: Scanner Drive

    This maintains the focal distance between the original and the lens during scanning. The scanner home position is detected by the home position sensor [H]. The scanner return position is determined by counting the scanner motor drive pulses. A183/A184...

  • Page 39: Lens And 4Th/5Th Mirror Drive (A184 Copier Only)

    Drive from the lens & mirror motor is also transmitted to the 4th/5th mirror drive cam [E]. As the lens unit position is changed, the cam rotates to change the 4th/5th mirror [F] position to provide proper the focal distance between the lens and the drum. A183/A184...

  • Page 40: Automatic Image Density Sensor

    If less light is reflected from the original (the image is darker), the sensor outputs a lower voltage. The CPU compares the maximum detected voltage with the standard voltage and compensates the copy image density by changing the development bias voltage. A183/A184...

  • Page 41: Exposure Lamp Voltage Control

    Depending on the SP34 setting, the exposure lamp data is increased or decreased for both ADS and manual ID modes. SP34 Setting Setting Exposure Lamp Normal Light +3 steps Dark –3 steps Lighter +6 steps Darker –6 steps Lightest +10 steps Darkest –10 steps A183/A184...
  • Page 42 SP setting and the interval. SP62 Setting Correction Interval 1 step/1500 copies 1 step/1000 copies 1 step/2000 copies 1 step/500 copies 1 step/2500 copies 1 step/250 copies 1 step/3000 copies 1 step/4000 copies No Correction (Default setting: 0) A183/A184 2-10...
  • Page 43 Magnification Ratio Reproduction Ratio Correction Factor 70% to 72% +4 steps 73% to 78% +2 steps 79% to 119% 120% to 129% +4 steps 130% to 141% +8 steps 2-11 A183/A184...

  • Page 44: Erase

    The erase lamp [A], which is installed in the upper unit, consists of a single row of LEDs extended across the full width of the drum. The erase lamp has the following functions: leading edge erase, side erase (A184 copier only), and trail edge erase. A183/A184 2-12...

  • Page 45: Lead Edge Erase

    The LEDs stay on to erase the leading edge of the latent image in the next copy cycle. After the final copy, the erase lamps turn off at the same time as the main motor. 2-13 A183/A184...

  • Page 46: Development

    In this way, the latent image is developed. The development roller is given a suitable negative bias for preventing toner from being attracted to the non-image areas on the drum which may have a residual negative charge. The bias also controls image density. A183/A184 2-14...

  • Page 47: Drive Mechanism

    A184D510.wmf When the main motor [A] turns on, the drive is transmitted to the development roller gear [B] through idle gears. The rotation of the development roller gear is transmitted to the agitator gears [C] through idle gears. 2-15 A183/A184...

  • Page 48: Cross-Mixing

    The magnets in the development roller [C] attract the developer, and the development roller sleeve rotates to carry the developer to the drum. The doctor blade [D] trims the developer on the development roller to the desired thickness. A183/A184 2-16...

  • Page 49: Development Bias For Image Density Control

    Normally, notch 3 is used for the ADS mode. If SP mode 19 is changed from 0 to 1, ADS mode is disabled and notch 3 is used for the center setting of the manual ID level. The base exposure lamp voltage also varies depending on the manual ID level as shown. 2-17 A183/A184...

  • Page 50: Base Bias Voltage Factor In Automatic Image Density (Ads) Mode

    60 to 69 –320 V 29 to 59 –360 V 0 to 28 (dark) –380 V ADS Output Voltage α = + (Total V Correction Steps so far + Reproduction Correction Steps) x 0.5 ADS0 : ADS Reference Voltage ADS0 A183/A184 2-18...

  • Page 51: Drum Residual Voltage

    ) will gradually increase. To compensate for this, the bias voltage is increased by –10 V every 5 k copies. The V correction is done up to 20 k copies. The V correction will not change after 20 k copies. 2-19 A183/A184...

  • Page 52: Development Bias Circuit

    When the Start key is pressed, the CPU starts sending the bias trigger pulses to CN1-4. This energizes the development bias circuit within the high voltage supply board which applies a high negative voltage to the development roller. The development bias is applied whenever the drum is rotating. A183/A184 2-20...

  • Page 53: Toner Supply

    The toner bottle has a spiral groove that helps move toner to the toner bottle opening [I]. Then the toner is carried up to the opening [J] of the toner bottle holder by the rotating fins [K], to be supplied into the development unit. 2-21 A183/A184...

  • Page 54: Toner Density Detection

    During the developer initialization, the CPU adjusts the TD sensor control voltage so that the TD sensor outputs 1.9 ± 0.1 volts for the toner to carrier ratio of new developer (4.0% by weight). This voltage is used as the standard TD sensor voltage. A183/A184 2-22...

  • Page 55: Toner Supply Control

    Target Toner Sensor Voltage), and toner is supplied when the TD sensor output is higher than this target voltage. The machine has two ways of calculating the target toner sensor voltage; the method used depends on SP30. The toner supply amount can also be changed using SP31 or 32. 2-23 A183/A184...
  • Page 56 If 1 or 3 is selected in SP30, the setting of SP53 is used as the target toner sensor voltage. In this case, the target toner sensor voltage is determined by the following formula: Target Toner Sensor Voltage = SP53 setting x 0.02 [V] (Default: 97 = 1.94 V) A183/A184 2-24...
  • Page 57 Toner Supply Clutch On Time Corresponding image area ratio SP32 Setting (seconds) Stays on until the TD sensor voltage becomes lower than the target voltage. 0 (No toner supply) Example: Set SP32 to 2 if the customer’s originals are typically 15% black. 2-25 A183/A184...

  • Page 58: Fixed Supply Mode

    Under this condition, the machine will not perform the toner end detection. If the value recovers above 0.2 volts, or the main switch is turned off and on, this condition is canceled and the toner density detection will recover to the previous settings. A183/A184 2-26...

  • Page 59: Toner End Condition

    40 seconds to evenly distribute toner inside the development unit. The on/off timing of the clutch is set using SP25 and 26. (These settings should not be changed.) 2-27 A183/A184...

  • Page 60: Image Transfer

    [A], and the corona wire generates negative ions. These negative ions are applied to the back side of the copy paper. This negative charge forces the paper against the drum and attracts the positively charged toner onto the paper. A183/A184 2-28...

  • Page 61: Transfer Corona Circuit

    To apply the proper transfer current to the drum, the transfer corona casing is connected to ground through a varistor. This keeps the potential of the casing at –620 volts to prevent excess corona current from flowing into the casing. 2-29 A183/A184...

  • Page 62: Drum Cleaning

    A counter blade system is used for drum cleaning. The cleaning blade [A] scrapes off any toner remaining on the drum after the image is transferred to the paper. The removed toner is transported into the developer to be recycled. A183/A184 2-30...

  • Page 63: Toner Recycling Mechanism

    As the coil rotates, the toner moves from left to right to be transported to the toner recycling belt [B]. The paddles of the belt, which is driven by the toner collection coil shaft, transports the toner into the developer, and the toner is recycled. 2-31 A183/A184...

  • Page 64: Quenching

    In preparation for the next copy cycle, light from the quenching lamp (QL) [A], which is installed in the upper unit, neutralizes any charge remaining on the drum. LEDs are used for quenching and the lamp is turned on whenever the main motor rotates. A183/A184 2-32...

  • Page 65: Paper Feed And Registration

    The paper tray has two corner separators, which allow only one sheet to feed. They also serve to hold the paper stack. If a sheet of paper is set on the by-pass feed table, the registration sensor [E] is actuated and the machine goes to by-pass feed mode. 2-33 A183/A184...

  • Page 66: Paper Feed Mechanism

    [E]. The solenoid stays on for 250 milliseconds and then turns off. The feed rollers stop when they complete one rotation. Before the feed rollers stop, the leading edge of the paper is caught by the relay rollers [F]. A183/A184 2-34...

  • Page 67: Registration Mechanism

    [C] is energized to release the stopper, synchronizing the paper feeding with the image on the drum. After 0.5 second, the registration solenoid is de-energized. The registration sensor detects paper length and paper end. 2-35 A183/A184...

  • Page 68: By-Pass Feed

    222 milliseconds to drive the relay roller [C] to catch the leading edge of the paper. After the Start key is pressed, the main motor starts again to transport the paper to the registration roller [D]. The registration solenoid is energized 1912 milliseconds after the main motor started rotating. A183/A184 2-36...

  • Page 69: Paper Feed And Misfeed Detection Timing

    5.7 seconds after the Start key is pressed. (2): Checks whether the exit sensor is actuated within 5.7 seconds after the Start key is pressed. (3): Checks whether the copy paper has passed through the exit sensor 10.3 seconds after the Start key is pressed. 2-37 A183/A184...

  • Page 70: Image Fusing

    The exit sensor [F] monitors the progress of the copy paper through the fusing unit and acts as a misfeed detector. The exit rollers drive the copy paper to the copy tray. A183/A184 2-38...

  • Page 71: Fusing Drive Mechanism

    When the upper unit is closed, the pressure roller is pushed up by the arms [D]. The two springs [E] apply the proper fusing pressure between the hot roller and the pressure roller. 2-39 A183/A184...

  • Page 72: Fusing Lamp Control

    185°C. After the above time period When the Start key is pressed, the red indicator blinks and copying 150°C starts after the fusing temperature reaches 170°C. During copying 185°C After copying is finished 150°C A183/A184 2-40...
  • Page 73 After copying is finished, the fusing temperature is controlled at 150°C. To prevent any copy quality problem caused by exposure lamp intensity fluctuation, the fusing lamp does not turn on while the exposure lamp is on, even if the fusing temperature drops below 185°C. 2-41 A183/A184...

  • Page 74: Fusing Lamp Control Circuit

    Normally, the voltage applied to the lamp is the full duty cycle of the ac waveform. However, through SP29, fusing power can be set to phase control mode. (Phase control is used only if the customer has a problem with electrical noise or interference.) A183/A184 2-42...

  • Page 75: On/Off Control

    The trigger pulse (LOW part) is wider [C1] and power is supplied for longer [D1] when the hot roller temperature is lower. It is narrower [C2] and power is supplied for a shorter time [D2] when the hot roller is near the operating temperature. 2-43 A183/A184...

  • Page 76: Overheat Protection

    CN121-10 and CN121-11) becomes too low. If the main board detects this condition, "E-53" lights on the operation panel and power to the fusing lamp is cut. Even if the thermistor overheat protection fails, the thermofuse opens when it reaches 169°C, removing power from the fusing lamp. A183/A184 2-44...
  • Page 77 INSTALLATION...

  • Page 79: Installation Requirements

    9. Place the copier on a strong and level base. 10. Do not place the machine where it may be subjected to strong vibrations. 1.2 MACHINE LEVEL 1. Front to back: Within 3 mm (0.12") of level 2. Right to left: Within 3 mm (0.12") of level A183/A184...

  • Page 80: Minimum Space Requirements

    120 V/60 Hz: More than 10 A 220 ~ 240 V, 50/60 Hz: More than 6 A 2. Permissible voltage fluctuation: 3. Do not set anything on the power cord. NOTE: a) Make sure the plug is firmly inserted in the outlet. b) Avoid multi-wiring. A183/A184...

  • Page 81: Installation

    9. Operating Instructions - Italian (-26 machines) 10. Operating Instructions - Portuguese (-57 machines) 11. Model Name Decal (-10, -22, machines) 12. NECR - English (-57 machines) 13. NECR - Multi-language (-27, -29 machines) 14. Warranty Card (-17 machines) 15. User Registration Card (-17 machines) A183/A184...

  • Page 82: Installation Procedure

    3. Take off the tape covering the screw and remove the knob screw [B] and red tag [C] as shown. NOTE: Save the knob screw for future shipping use. 4. Open the top unit and remove the 4th/5th mirror lock tool [D]. NOTE: Save the shipping retainer for future shipping use. A183/A184...
  • Page 83 7. Fit the imaging unit onto both hinges [B], as shown. Then, set the unit on the guide plate, as shown. 8. Pull out horizontally and remove the tape [C] inside the imaging unit, as shown. A183/A184...
  • Page 84 11. Open the lever [C] and put the cap side of the toner bottle under the lever. 12. Push the other side of the toner bottle in until it locks in position. 13. Close the lever [C]. 14. Close the top unit. A183/A184...
  • Page 85 19. Put the cord clamp [C] in the hole that is opposite side of the entrance of the cord, if necessary. 20. Insert the power plug and turn the main switch on. NOTE: When the main switch is turned on, the machine automatically starts developer initialization. A183/A184...

  • Page 87: Service Tables

    SERVICE TABLES...

  • Page 89: Service Remarks

    6. When placing the imaging unit onto the copier, do not push it down forcibely. This unit is set only to put it on the guide plate. (The imaging unit is shaky if you push it — this is not a problem.) A183/A184...

  • Page 90: Optics

    7. Whenever cleaning the optics, all the following actions must be done in order. a) Optics cleaning b) SP95 (V Correction Reset) c) SP48 (Light Intensity Adjustment) – see the SP mode table for details d) SP56 (ADS Reference Voltage Adjustment) – see the SP mode table for details A183/A184...

  • Page 91: Transfer Corona

    3. Avoid storing paper for a long time. At high temperature and high humidity, or at low temperature and low humidity, store paper in a plastic bag. This is especially important to decrease the amount of curls or waves that would lead to paper misfeeds. A183/A184...

  • Page 92: Others

    Otherwise, copy quality might be seriously affected. 5. Tighten securely the screws used for grounding the following PCBs when reinstalling them. • Main Control Board • Scanner Drive Board • AC Drive/DC Power Supply Board • High Voltage Supply Board-CT/B/G A183/A184...

  • Page 93: Program Modes

    To leave from these modes, turn the main switch off/on. 3. Display To achieve the same operation for the two models (A183 and A184), the Magnification Ratio display, the +Zoom key and the –Zoom key are not used. To display and to distinguish various conditions using the copy counter, the appearance of the copy counter and the dot (•) which appears in the top left...

  • Page 94: Sp Mode

    At this point, the Copy Counter will be blinking, and the dot (•) will be lit. 2. When the Lighter key is pressed, the number which is currently blinking in the Copy Counter will be entered as the selected program number. A183/A184...
  • Page 95 Copy Counter will be entered as the new value or setting, and will be stored in memory. 3. The copier is ready to accept the new program number. Repeat from step 1 or leave SP mode by turning the main switch off/on. A183/A184...

  • Page 96: Sp Mode Quick Reference Table

    Toner Density Adjustment Correction Reset Lead Edge Erase Margin Toner End Force Cancel Adjustment Registration Adjustment Service Call (E5) Reset Vertical Magnification Adjustment Total Counter Clear Horizontal Magnification Clear All Memory Adjustment * Items Listed On The Factory Setting Data Sheet A183/A184...

  • Page 97: Up Mode And Sp Mode Cross Reference Table

    Image Adjustment at ID Level 1 Image Bias Adjustment at ID Level 5 Toner Density Adjustment Auto Shut Off Time Setting Auto Reset Time Setting Count Up/Down Selection Total Copy Counter Display Imaging Unit Counter Display Correction Interval Enable / Disable Auto Shut-Off A183/A184...

  • Page 98: Service Program Mode Table

    Press the Start key to make a copy. It stops when reaching the set count, or when the C/S key is pressed. Use this mode to check whether the paper misfeed was caused by a sensor malfunction. The total counter increments when copies are made in this mode. A183/A184 4-10...
  • Page 99 Toner Supply Clutch Registration Solenoid Paper Feed Clutch Main Switch Main switch will turn off when performed. Optics Cooling Fan Exposure Lamp + Optics Standard voltage for Cooling Fan manual ID level 3 without corrections. Exhaust Fan Motor (High Speed) 4-11 A183/A184...
  • Page 100 Selects the toner supply clutch on time performed 0: 5 s. Supply On after every copy job under the toner near/end 1: 10 s. Time During condition. 2: 15 s. Toner 3: 20 s. Near/End 4: 25 s. Condition 5: 30 s. A183/A184 4-12...
  • Page 101 Normally, this value should not be changed. Fusing Selects the fusing temperature control mode. 0: ON/OFF Temperature control After selecting the control mode and turning the main Control 1: Phase switch off/on, the fusing temperature control mode is Selection control changed. 4-13 A183/A184...
  • Page 102 Ratio Supply Time Note Setting 3.5% 0.3 s Default 7.0% 0.6 s 1.2 s 2.4 s 3.6 s 4.8 s ∞ Continuous supply — No toner supply See "Detailed Descriptions-Toner Supply Control" for more details. A183/A184 4-14...
  • Page 103 Adjusts the lead edge erase margin. 0 ~ 15 Erase Margin Default = 8 0.5 mm per step (–4.0 mm to +3.5 mm). Adjustment (2.5 mm from See "Replacement and Adjustment - Copy Quality the leading Adjustment" for details. edge) 4-15 A183/A184...
  • Page 104 See "Replacement and Adjustment - Copy Quality" for details on how to do this adjustment. Fusing Adjusts the control temperature of the hot roller during 175 ~ 195°C Temperature copying. Default=185°C Adjustment 175°C to 195°C in 1°C steps. A183/A184 4-16...
  • Page 105 For only this SP mode, the copies are made with the ADS mode (other SP modes use the manual ID level 3). The Manual Image Density indicator is used to display the first digit. 4-17 A183/A184...
  • Page 106 Keep this at the default setting. Imaging Unit Factory use only. Check Mode TD Sensor Displays the TD sensor initial setting output. (0.02 V per Initial Output step) The Manual Image Density indicator is used to Display display the first digit. A183/A184 4-18...
  • Page 107 For example: The total copy count is 1087 Manual ID Indicator Copy Counter The mechanical total counter and the electrical total counter may not always display the same value, because of initial differences in the counter values. 4-19 A183/A184...
  • Page 108 To clear, enter "1" and press the Lighter key and the Darker key at the same time. To avoid resetting the memory by mistake, the memory is reset only when the Lighter key and the Darker key are pressed at the same time. A183/A184 4-20...

  • Page 109: Clear All Memory Procedure

    SP modes at the factory. • SP41: Lead Edge Erase Margin • SP42: Registration Adjustment • SP43: Vertical Magnification Adjustment • SP44: Horizontal Magnification Adjustment • SP48: Light Intensity Adjustment 4-21 A183/A184...
  • Page 110 PROGRAM MODES 4. Open SP3 (Destination Setting), and enter the setting according to the customer’s environment. 5. Check the copy quality and the paper path and do any necessary adjustment (see Replacement and Adjustment - Copy Quality Adjustments). A183/A184 4-22...

  • Page 111: Service Tables

    (2.5 ± 0.2 volts) High Voltage Supply Board - CT/B/G Change the charge and transfer corona voltage High Voltage Supply Board - CT/B/G Changes the standard development bias voltage High Voltage Supply Board - CT/B/G Changes the charge grid voltage 4-23 A183/A184...

  • Page 113: Preventive Maintenance

    PREVENTIVE MAINTENANCE...

  • Page 115: Preventive Maintenance Schedule

    Bottom Plate Pad Soft cloth dampened with water Relay Roller Soft cloth dampened with water Registration Roller Soft cloth dampened with water Paper Feed Guide Soft cloth dampened with water Fusing Hot Roller Pressure Roller Stripper Pawls Suitable solvent A183/A184...
  • Page 116 PREVENTIVE MAINTENANCE SCHEDULE 30 k 60 k 90 k 120 k Notes Fusing Entrance and Exit Suitable solvent Guide Plates Fusing Thermistor Suitable solvent Others Adjust when the lamp voltage is changed. Exit and Registration Sensors Bearings Ozone Filter A183/A184...

  • Page 117: Regular Pm Procedure

    2. Clean the end blocks and casings with a blower brush or dry cloth. 3. Clean the erase lamp with a blower brush or dry cloth. Replace the corona wires 4. Clean the quenching lamp with a blower brush (every 60 k) or dry cloth. A183/A184...
  • Page 118 2. Make a copy of a test chart at manual image density level 3. Perform the light intensity adjustment (SP48) if necessary. 3. Return the setting of SP19 from 1 to 0. 4. Perform the ADS reference voltage adjustment (SP56). A183/A184...

  • Page 119: Special Tools And Lubricants

    2. SPECIAL TOOLS AND LUBRICANTS Part Number Description Q’ty A184 9501 Scanner Positioning Pin (2 pcs/set) 5214 9500 Test Chart - OS-A4 (10 pcs/set) 5442 9103 Launa OIl 5203 9501 Silicone Grease G-510 5420 9507 Digital Multimeter 5442 9101 Setting Powder A183/A184...

  • Page 121: Replacement Adjustment

    REPLACEMENT ADJUSTMENT...

  • Page 123: Exterior

    3. Remove the side cover [D] (1 screw). 4. Install the side cover [D] at the other position (1 screw). 5. Connect the two connectors of the operation panel, then set the operation panel and secure it with the screw removed in step 1. A183/A184...

  • Page 124: Platen Cover Position Change

    4. Attach the other hinge to the platen cover. Hold the platen cover and lower the hinge into the opening. Then push the hinge into the opening with your finger until it locks in position. A183/A184...

  • Page 125: Exterior Cover/Exposure Glass Removal

    [B], and the platen cover. 2. Remove the upper cover [C] (4 screws). 3. Remove the exposure glass [D]. NOTE: When removing or reinstalling the upper cover, take care not to hook the harness onto the projections inside the cover. A183/A184...

  • Page 126: Upper Unit Stopper Release

    NOTE: If the upper unit is opened more than 90 degrees, the exterior cover of the lower unit might be damaged. 6. To keep the position of the upper unit, fix the arm [D] to position [G] with the pin and snap ring removed in step 4. A183/A184...

  • Page 127: Optics

    3. Connect the two connectors [G] and [H] and secure the harness to the clamps. 4. Tighten the two screws [E] to secure the 1st scanner. 5. Install the exposure glass and exterior covers. Then, check the image quality. A183/A184...

  • Page 128: 2Nd Mirror Replacement

    3. While holding the mirror, set one spring plate [C]. Then set the other spring plate [A]. NOTE: 1) Make sure that the notches [D] in the spring plates are correctly set at position [E]. 2) Do not touch the reflecting surface with bare hands. A183/A184...

  • Page 129: 3Rd Mirror Replacement

    P/N: A184 9501 (See the parts catalog.) 4. Tighten the 2 screws to fix the 2nd scanner position. 5. Install the 1st scanner. (Refer to 1st Scanner Removal.) 6. Install the exposure glass and exterior covers. Then, check the image quality. A183/A184...

  • Page 130: Lens And 4Th/5Th Mirror Position Adjustment

    3. Insert the two positioning pins [B]. If the pins cannot be inserted, loosen the screw [C] and adjust the lens unit position. NOTE: 1) Use the timing belt [D] to move the lens unit. 2) Scanner positioning pins are available as a service part. P/N: A184 9501 (See the parts catalog.) A183/A184...

  • Page 131: 4Th Mirror Removal

    4. Remove the 4th mirror bracket [C] (1 spring and 1 screw). 5. Remove the 4th mirror [D]. (Refer to steps 3 to 5 of 2nd Mirror Removal.) NOTE: When reinstalling the screw [E], do not tighten it strongly. Otherwise, the frame will bend. A183/A184...

  • Page 132: 5Th Mirror Removal

    5. Turn the lens unit base upside down. Then remove the 5th mirror [D]. (Refer to steps 3 to 5 of 2nd Mirror Removal.) NOTE: Before turning the lens unit base over, confirm that the lens unit is in the home position. Otherwise, the lens unit will drop. A183/A184 6-10...

  • Page 133: Lens And Mirror Motor Removal

    5. Turn the lens unit base upside down. Then remove the lens and mirror motor [D] (2 screws). NOTE: Before turning the lens unit base over, confirm that the lens unit is in the home position. Otherwise, the lens unit will drop. 6-11 A183/A184...

  • Page 134: Imaging Unit

    NOTE: 1) Be careful not to damage the drum surface. 2) Do not touch the drum surface with bare hands. 3. After removing the imaging unit from the main body, cover the unit with sheets of paper to prevent the drum from being exposed. A183/A184 6-12...

  • Page 135: Charge Corona Unit Removal

    3.2 CHARGE CORONA UNIT REMOVAL A184R516.wmf 1. Remove the imaging unit. (See Imaging Unit Removal.) 2. Remove the charge corona unit [A] (1 screw). NOTE: When removing the charge corona unit, be careful not to scratch the drum surface. 6-13 A183/A184...

  • Page 136: Cleaning Blade Replacement

    3. Replace the cleaning blade [A] (2 screws). NOTE: 1) When removing the cleaning blade, be careful not to scratch the drum surface. 2) When installing a new cleaning blade, apply setting powder on the edge of the cleaning blade. A183/A184 6-14...

  • Page 137: Paper Feed

    2. Remove the imaging unit. (See Imaging Unit Removal.) 3. Replace the paper feed clutch [A] (1 connector, 1 snap ring, and a spring). NOTE: When reinstalling a new clutch, engage the notch [B] with the stopper [C]. 6-15 A183/A184...

  • Page 138: Paper Feed Roller Removal

    NOTE: Do not touch the roller with bare hands. - Reinstallation - 1. Set the paper feed roller assembly so that the flat side of the semicircular feed rollers faces down. 2. Slide the paper feed roller assembly to the front side until it clicks. A183/A184 6-16...

  • Page 139: Registraion Solenoid Replacement

    8. Replace the registration solenoid and the plunger spring. NOTE: 1) When reinstalling the registration solenoid, make sure that the harness side of the solenoid is facing upwards. 2) When reinstalling the new plunger spring, make sure not to stretch it by more than 21.0 mm. 6-17 A183/A184...

  • Page 140: Fusing

    5.1 FUSING UNIT REMOVAL A184R520.wmf 1. Remove the upper cover and the exposure glass. (See Exterior Cover/Exposure Glass Removal.) 2. Release the upper unit stopper. (See Upper Unit Stopper Release.) 3. Remove the fusing unit [A] (4 screws and 3 connectors). A183/A184 6-18...

  • Page 141: Pressure Roller Replacement

    1. Release the upper unit stopper. (See Upper Unit Stopper Release.) 2. Remove the fusing upper unit [A] (4 screws). 3. Remove the pressure roller [B] with the two bearings [C]. 4. Replace the pressure roller. NOTE: Do not touch the pressure roller surface with bare hands. 6-19 A183/A184...

  • Page 142: Fusing Lamp Replacement

    NOTE: 1) Do not touch the fusing lamp with bare hands. 2) When installing a new fusing lamp, set the fusing lamp connectors correctly as shown in the illustration. 3) Make sure that both fusing lamp insulators are properly set in the holders. A183/A184 6-20...

  • Page 143: Fusing Exit Pawl Replacement

    2. Remove the fusing upper unit [A] (4 screws and 2 connectors). 3. Remove the fusing exit guide [B] (2 screws). 4. Remove the fusing exit pawl bracket [C] (2 screws). 5. Replace the fusing exit pawls [D] (1 spring each). 6-21 A183/A184...

  • Page 144: Hot Roller Replacement

    2) When reinstalling the exit pawls, be careful not to scratch the hot roller surface. 3) When reinstalling the fusing exit guide, be careful not to damage the exit sensor. 4) Do not touch the hot roller surface with bare hands. A183/A184 6-22...

  • Page 145: Fusing Thermistor Replacement

    2. Replace the fusing thermistor [A] (1 screw). 5.7 FUSING THERMOFUSE REPLACEMENT A184R527.wmf 1. Remove the fusing unit. (See Fusing Unit Removal.) 2. Remove the hot roller [A]. (See Hot Roller Replacement.) 3. Remove the fusing thermofuse [B] (2 screws). 6-23 A183/A184...

  • Page 146: Others

    6.1 TRANSFER CORONA UNIT REMOVAL A184R528.wmf 1. Remove the imaging unit. (See Imaging Unit Removal.) 2. Push down both ends of the transfer corona unit [A]. Then release the front and rear hooks [B]. 3. Remove the transfer corona unit. A183/A184 6-24...

  • Page 147: Main Drive Unit Removal

    NOTE: When reinstalling the relay roller, turn each bearing until it clicks. 7. Remove the main drive unit [C] (2 connectors and 5 screws). NOTE: When reinstalling, set the main drive unit so that the spring plate [D] is on the main motor bracket. 6-25 A183/A184...

  • Page 148: Main Motor Removal

    OTHERS 6.3 MAIN MOTOR REMOVAL A184R531.wmf 1. Remove the main drive unit. (See Main Drive Unit Removal.) 2. Remove the main motor [A] (4 screws). A183/A184 6-26...

  • Page 149: Toner Supply Clutch Removal

    2. Remove the brackets [A] and [B] (6 screws and 1 spring). NOTE: Be careful not to drop the gears. 3. Remove the toner supply clutch [C]. NOTE: When reinstalling the clutch, engage the pin [D] with the stopper [E] as shown. 6-27 A183/A184...

  • Page 150: Erase Lamp Removal

    1. Remove the exterior covers and the exposure glass. (See Exterior Cover/Exposure Glass Removal.) 2. Open the upper unit. 3. Remove the harness clamper [A] (1 screw). 4. Disconnect the connector (CN103) [B] from the main board. 5. Remove the erase lamp [C] (2 screws). A183/A184 6-28...

  • Page 151: Quenching Lamp Removal

    3. Remove the harness clamper [A] (1 screw). 4. Disconnect the connector (CN119) [B] from the main board. 5. Remove the quenching lamp [C] (2 screws). NOTE: When reinstalling, make sure that the quenching lamp is secured firmly by the hook [D]. 6-29 A183/A184...

  • Page 152: Ozone Filter Replacement

    OTHERS 6.7 OZONE FILTER REPLACEMENT A184R546.wmf 1. Open the upper unit. 2. Move the lever [A] in the direction of the arrow, while pulling down on the tape edge [B] as shown. 3. Replace the ozone filter [C]. A183/A184 6-30...

  • Page 153: Ac Drive/Dc Power Supply Board/Transformer

    2. Remove the fusing unit. (See Fusing Unit Removal.) 3. Remove the exit cover [A] (2 screws and 1 harness clamp). 4. Replace the ac drive/dc power supply board [B] (3 screws and all connectors) or the transformer [C] (4 screws and 2 connectors). 6-31 A183/A184...

  • Page 154: Main Control Board Replacement

    2. Remove the upper cover. (See Exterior Cover/Exposure Glass Removal.) 3. Remove the main control board [A] (4 screws and all connectors). 4. Remove the EEPROM [B] from the old main board and install it on the new board. A183/A184 6-32...

  • Page 155: Copy Quality Adjustment

    The grid voltage and charge corona current adjustment should be done to correct certain problems with image density after checking the other possible causes. 6-33 A183/A184...

  • Page 156: Light Intensity Adjustment

    8. Change the setting with the "+" or "–" key as follows: If the copy image is too dark: Increase the value If the copy image is too light: Decrease the value 9. Confirm that the image density is within the adjustment standard. 10. Perform the ADS adjustment (SP56). A183/A184 6-34...

  • Page 157: Sp Image Density Adjustment

    Change Image Density Normal Light Dark Lighter Darker Lightest Darkest - SP35 (Image Adjustment at ID level 1) - Setting Exposure Lamp Change –6 steps –8 steps –10 steps Image Density of ID Level 1 Normal Darker Darkest 6-35 A183/A184...

  • Page 158: Development Bias Voltage Adjustment

    2. Set the multimeter range to dc 1500 V, and connect the multimeter leads as shown. 3. Close the upper unit. 4. Turn on the development bias using SP9-2. 5. Adjust the development bias voltage by turning VRB on the high voltage supply unit. A183/A184 6-36...

  • Page 159: Sp Bias Settings

    The customer wants to change the overall image density of the copies. Purpose: To change the toner concentration inside the development unit. Method: SP38 How it works: Changes the toner supply threshold. As a result, toner density increases. 6-37 A183/A184...

  • Page 160: Grid Voltage Adjustment

    2. Set the multimeter range to dc 1500 V, and connect the multimeter leads as shown. 3. Close the upper unit. 4. Turn on the charge and transfer corona using SP9-2. 5. Adjust the grid voltage by turning VRG on the high voltage supply unit. A183/A184 6-38...

  • Page 161: Drum Current Adjustment

    [B], and connect the other terminal to the CT terminal of the high voltage supply board as shown in the illustration. NOTE: Make sure that the connector [B] is not in contact with the CT terminal [A]. 6-39 A183/A184...
  • Page 162 5. Close the upper unit. 6. Turn on the charge and transfer corona using SP9-2. 7. Adjust the drum current by turning VRCT on the high voltage supply board. 8. Perform the Grid Voltage Adjustment after changing the drum current. A183/A184 6-40...

  • Page 163: Ads Adjustment

    The horizontal magnification is not within the adjustment standard. Purpose: To maintain proper horizontal magnification. Less than ±0.5% difference between original and copy. Adjustment Standard: Method: SP44 (0.2%/step, 31 steps) How it works: Changes the lens home position. 6-41 A183/A184...

  • Page 164: Registration Adjustment

    How it works: Changes the erase lamp on period. 1. Place a 150 mm scale perpendicular to the left scale on the exposure glass. 2. Adjust the leading edge erase margin using SP41. Make copies and check the registration. A183/A184 6-42...

  • Page 165: Focus Adjustment

    5. Move the 1st scanner timing belt to change the optical distance between the 1st scanner and the 2nd scanner. 6. Reinstall the exterior covers and make a copy to check the image quality. 7. If the focus is still no good, repeat steps 1 to 5. 6-43 A183/A184...

  • Page 167: Troubleshooting

    TROUBLESHOOTING...

  • Page 169: Copy Quality

    The drum was exposed to fluorescent light or direct sunlight for a long period of time. • The drum was exposed to ammonia gas or corrosive fumes for a long period of time. 4. The imaging unit does not rotate. • Broken drive gear A183/A184...
  • Page 170 2) If the charge or transfer corona does not turn on even if the signal changes to LOW, replace the high voltage supply board. If there is no problem with the signal lines, replace the imaging unit if the sensitivity does not recover even when the drum is not exposed to light. A183/A184...

  • Page 171: Dirty Background

    Make a copy in reduction mode at manual image density level 4. Is the non-image area dirty? Is the optics section dirty? Clean the optics and perform the necessary SP modes in order (see Section 4 - Service Remarks for details). A183/A184...
  • Page 172 Clean the optics and perform the necessary SP modes in order (see Section 4 - Service Remarks for details). • If the signal at CN112-3 stays HIGH, check the harness and sensor, and replace any defective parts. • If the signal at CN112-2 stays LOW, replace the main board. A183/A184...

  • Page 173: Uneven Image Density

    Replace the 1st scanner unit. Is the erase lamp or quenching lamp dirty? Clean the erase lamp or quenching lamp. Are the corona wires or grid plate dirty? Clean the corona wires, grid plate, and casings. Replace the charge corona unit. A183/A184...

  • Page 174: Vertical Black Bands

    SP modes in order (see Section 4 - Service Remarks for details). Remove the cleaning blade and clean the edge of the cleaning blade. Then check if the edge of the cleaning blade is deformed or not. Replace the cleaning blade. Replace the imaging unit. A183/A184...

  • Page 175: Vertical Black Lines

    Check whether black lines appear on the copy by stopping the copy paper in the transport section. If no black lines appear, replace the hot roller. Check whether the drum is scratched or toner is built-up on the drum. Replace the imaging unit if necessary. A183/A184...

  • Page 176: Vertical White Lines Or Bands-1 (Dull Or Blurred)

    - Action - Are the charge corona wires or grid plate dirty? Clean the charge corona wires or grid plate. Is the grid plate or the charge corona wire detoriorated or deformed? Replace the charge corona unit. Replace the imaging unit. A183/A184...

  • Page 177: Vertical White Lines Or Bands-2 (Thin, Distinct)

    Replace the cleaning blade. Make a copy and stop the machine when the paper reaches the transport section. Do white lines appear on the copy? Replace the imaging unit. Replace the hot roller if it is scratched. A183/A184...

  • Page 178: Horizontal Black/White Lines

    - Action - Is the drum scratched? Replace the drum. Is the hot roller scratched? Replace the hot roller. If toner adheres to the drum surface, clean the drum with water. Also clean or replace the cleaning blade. A183/A184 7-10...

  • Page 179: Jitter

    Does the voltage at CN300-2 through 5 on the main board stay at 24 volts when the Start key is pressed? 24 volts Not 24 volts Replace the scanner motor or check the scanner drive. Replace the main board. 7-11 A183/A184...

  • Page 180: Black Spots On The Copy Image

    Repair the poor contact or replace the charge corona unit if needed. Check the voltage at CN123-3 on the main board. 0 volts Not 0 volts Replace the main control board. Replace the high voltage supply board -CT/B/G. A183/A184 7-12...

  • Page 181: Skewed (Optical) Copy Image

    Is each mirror positioned correctly on its scanner and on the 4th/5th mirror assembly? Reposition the mirror correctly. If the spring plates are defective, replace them. Readjust the height of 4th/5th mirror assembly by turning the adjusting screw. 7-13 A183/A184...

  • Page 182: Toner Density Too High

    SP95. Make a few sky shot copies and then readjust the light intensity and the ADS voltage. Does the toner supply clutch turn even though there is sufficient toner in the development unit? Check the voltage at CN104-1 on the main board. 24 volts 0 volts A183/A184 7-14...
  • Page 183 Is the grid voltage correct? Readjust the grid voltage. Check the related SP mode settings (SP 23, 24, 25, 26, 30, 31, 32, 34, 35, 36, 38, 48, 53, 54 and 62). Change the settings to lean towards the lighter side. 7-15 A183/A184...

  • Page 184: Toner Density Too Low

    See the "Abnormal Condition in Toner Density Detection" section. Does the toner supply clutch rotate? Check the voltage at CN104-1 on the main board. 24 volts 0 volts Replace the toner supply clutch. Replace the main control board. Go to A A183/A184 7-16...
  • Page 185 Change the value to the default setting "0". Go to A Is the grid voltage correct? Readjust the grid voltage. Clean the optics section and around the imaging unit. Perform the necessary SP modes in order (SP95, 48 and 56). 7-17 A183/A184...

  • Page 186: Unfused Copy Image

    The copy paper is creased. - Possible Causes - 1. The fusing temperature is too high. 2. The thermistor is malfunctioning. - Action - Decrease the fusing temperature using SP49. No good Check the thermistor. If the thermistor is malfunctioning, replace it. A183/A184 7-18...

  • Page 187: Paper Misfeed

    Misfeed No misfeed Check which sensor (registration sensor or exit sensor) is defective. If sensors are not defective, replace the main board. Check whether a mechanical or electrical malfunction occurs. Replace the defective parts. 7-19 A183/A184...

  • Page 188: Abnormal Condition In Toner Density Detection

    Perform SP90 (Factory Data and Counter Clear). Check the continuity between the TD sensor harness and CN106 on the main control board. Are they properly connected? Connect the connector firmly. Is the TD sensor circuit open? Replace the imaging unit. A183/A184 7-20...
  • Page 189 Check the continuity of connection between the imaging unit and the main copier. Are they connected properly? Replace the latch connector. Check the electrical continuity of the harness from the main control board to the TD sensor. Are they connected properly? Replace the harness. Replace the imaging unit. 7-21 A183/A184...

  • Page 190: Optics Overheat Protection

    Is the optics thermistor short circuited? Replace the thermistor. Check if the customer has run excessive continuous copy jobs. Replace the main board. Notify the customer that the machine may stop when excessive continuous copy jobs are performed. A183/A184 7-22...

  • Page 191: Service Call Conditions

    The feedback signal falls below 0.5 volt (rms) for 1.0 second when the exposure lamp is on. • The exposure lamp stays on for longer than 25 seconds. - Possible Causes - • Defective ac drive/dc power supply board • Defective main control board • Defective power supply circuit 7-23 A183/A184...
  • Page 192 - Definition - The detected current is 50 Hz on a 60 Hz machine, or SP3 (Destination Setting) error. - Possible Causes - • Wrong power line connection • SP3 is set to "0" • SP3 input error A183/A184 7-24...
  • Page 193 The lens/mirror home position sensor’s output remains LOW (de-actuated) for 10 seconds after the unit moves to the home position. - Possible Causes - • Defective lens/mirror home position sensor • Defective lens/mirror drive motor • Defective main control board • Defective lens/mirror drive mechanism 7-25 A183/A184...
  • Page 194 Defective fusing thermistor • Fusing lamp open • Defective ac drive/dc power supply board • Defective main control board • CN121 on the main control board or CN404 on the ac drive/dc power supply board is not correctly connected. A183/A184 7-26...
  • Page 195 To clear this error, refer to note 3 at the beginning of this chapter. - Possible Causes - • Thermistor open • Defective main control board • Defective ac drive/dc power supply board • Fusing lamp open • Poor thermistor connection 7-27 A183/A184...
  • Page 196 • Connectors of the main switch are not correctly connected. • Poor DC Harness of the main switch connection (some lines must be cut) *Remedy for the initial produced machines • Turn off and on the main switch. A183/A184 7-28...

  • Page 197: Electrical Component Defects

    Main Switch (SW1) OPEN The copier does not turn on. SHORT The copier does not turn off. Interlock Switch (SW2) OPEN The copier does not turn on. The copier does not turn off when the SHORT upper unit is opened. 7-29 A183/A184...

  • Page 198: Blown Fuse Conditions

    E22 lights 2 A/125 V T2 A/250 V No response 5. USER CODES U - code Contents Imaging unit life near end condition (Blinking) Imaging unit life end condition (Lit) Imaging unit not installed (Lit) Developer not installed (Lit) A183/A184 7-30...
  • Page 199 TECHNICAL SERVICE BULLETINS...
  • Page 200       SUBJECT: GUIDE MYLAR GENERAL: To improve the reliability of paper transportation from the Paper Tray, the four (4) Paper Guide Mylars (A1842569) and the three (3) Paper Feed Guide Mylars (A1842566) have been replaced with a single solid piece Guide Mylar (A1842577).
  • Page 201       SUBJECT: MYLAR CUSHION GENERAL: To prevent vibration of the 1st scanner, a Mylar Cushion has been attached to the optics frame as shown below. Please update all FT2012/ 2212 Parts Catalogs with this information. Mylar Cushion REFERENCE NEW PART NO.
  • Page 202           U FNEFfFFEF g NNG NFfENfML    U FFEF SUBJECT: SERVICE CODE E29 SYMPTOM: When the machine is powered “ON” or when the Lens Unit moves in the reduction direction a Service Code E29 is displayed on the Operation Panel. CAUSE: The Lens Home Position Sensor (AW020075) is not seated into the bracket.
  • Page 203 8)',2-'%0#7)6:-')#&900)8-2 &900)8-2#291&)6U %ELGf%ELH#g#NNE NIfFFfML %440-'%&0)#13()0U The chart listed below shows the Last Bulletin ####+)78)82)6#2% Number issued for the A183/A184 series. ####6-'3,#*8FNEFˆFFEF Bulletin Cross Reference ####7%:-2#2% Ricoh Group Companies Last Bulletin No. Gestetner Ricoh Savin SUBJECT: FUSING UNIT GENERAL: The part numbers for the Fusing Unit in the Parts Catalog are wrong. The following parts corrections are being issued for all A183/A184 catalogs.
  • Page 204 TRAY GUIDE PLATE GENERAL: To prevent the paper tray from falling down, a tray guide plate shown below has been added under the paper tray. The following Parts are being issued for all A183/A184 Parts Catalogs. Tray Guide Plate (A1844190) REFERENCE NEW PART NO.
  • Page 205 NIfFFfML %440-'%&0)#13()0U ####+)78)82)6#h#2f% ####6-'3,#h#*8FNEFfFFEF ####7%:-2#h#2f% SUBJECT: PLATEN COVER HINGE GENERAL: To increase durability, the hinges have been changed. The following parts updates are being issued for all A183/A184 Parts Catalogs. A1841498 A1841499 Ø Ø A1841451 A1841452 REFERENCE OLD PART NO.
  • Page 206 30K cycles. Please delete the following items in the PM Parts Index table.. Page 5-2 PM Table 30 k 60 k 90 k 120 k Notes Others Adjust when the lamp voltage is changed. Exit and Registration Sensors Bearings Ozone Filter Page 5-3 Regular PM Procedure Continued... #'328630#23T#NNF RICOH GROUP COMPANIES...
  • Page 207 Tech Service Bulletin No. A183/A184 – 004 Page 2 of 2 Page 5-4 Regular PM Procedure Delete “Replace the Ozone Filter” Replace the ozone filter. Inspect the exit and registration sensors. Inspect the bearings. DESCRIPTION in Parts Catalog of items involved REFERENCE PART NO.
  • Page 208 %440-'%&0)#13()0U ####+)78)82)6#h#2f% ####6-'3,#h#*8FNEFfFFEF ####7%:-2#h#2f% SUBJECT: ADS ADJUSTMENT PROCEDURE GENERAL: Please correct your A183/A184 Service Manual as follows: Page 6-41 NOTE: An denotes a Changed or Newly Added part. 7.6 ADS Adjustment When: 1. After light intensity is changed 2. Image density in ADS mode is too light or too dark Purpose: To maintain correct ADS mode operation.
  • Page 209 Tech Service Bulletin No. A183/A184 – 005 Page 2 of 2 Page 7-3 1.2 DIRTY BACKGROUND “Possible Causes” should be corrected as follows. Item No. 5 has been eliminated since this copier does not use a fiber optics cable for the ADS sensor.
  • Page 210 The manual for the Operating Instructions - French LT version is not available for the North American copiers. Please remove the part number from the Parts Catalog. The following Part update is being issued for all A183 and A184 Parts Catalogs. REFERENCE OLD PART NO.
  • Page 211    h f SUBJECT: PARTS CATALOG UPDATES GENERAL: The following part updates are being issued for all A183 and A184 Parts Catalogs. • UPPER MAIN HARNESS – The Descriptions for the Upper Main Harness UPDATE 1: have been changed and the 230V Upper Main Harness has been added to the Parts Catalog.
  • Page 212 LOWER MAIN HARNESS – The Descriptions for the Lower Main Harness UPDATE 2: have been changed and the 230V Lower Main Harness has been added to the Parts Catalog. Please update your A183 and A184 Parts Catalogs. REFERENCE NEW PART NO.
  • Page 213 To prevent the Photo-interrupter from being accidentally removed or damaged, a Sensor Bracket has been added. The Sensor Bracket is mounted under the Photo-interrupter as shown in the illustration below. The following part update is being issued for all A183/A184 Parts Catalogs. Please update your Parts Catalog with the following information.
  • Page 214 Each bulletin package contains 1 set of replacement pages. PAGES: The revised areas have been highlighted by an arrow ⇒. • Updated Information • 2-19 Updated Information • 4-15 Updated Information • 6-35 Updated Information • 6-37 Updated Information RICOH GROUP COMPANIES CONTROL NO. 006...
  • Page 215 Depending on the SP34 setting, the exposure lamp data is increased or decreased for both ADS and manual ID modes. SP34 Setting Setting Exposure Lamp Normal Light +3 steps Dark –3 steps Lighter +6 steps Darker –6 steps Lightest +10 steps Darkest –10 steps A183/A184...
  • Page 216 ) will gradually increase. To compensate for this, the bias voltage is increased by –10 V every 5 k copies. The V correction is done up to 20 k copies. The V correction will not change after 20 k copies. 2-19 A183/A184...
  • Page 217 Adjusts the lead edge erase margin. 0 ~ 15 Erase Margin Default = 8 0.5 mm per step (–4.0 mm to +3.5 mm). Adjustment (2.5 mm from See "Replacement and Adjustment - Copy Quality the leading Adjustment" for details. edge) 4-15 A183/A184...
  • Page 218 Change Image Density Normal Light Dark Lighter Darker Lightest Darkest - SP35 (Image Adjustment at ID level 1) - Setting Exposure Lamp Change –6 steps –8 steps –10 steps Image Density of ID Level 1 Normal Darker Darkest 6-35 A183/A184...
  • Page 219 The customer wants to change the overall image density of the copies. Purpose: To change the toner concentration inside the development unit. Method: SP38 How it works: Changes the toner supply threshold. As a result, toner density increases. 6-37 A183/A184...
  • Page 220 LOCK RELEASE LEVER GENERAL: The design of the Lock Release Lever has been changed to improve reliability as shown below. The following parts catalog correction is being issued for all A183/A184 Parts Catalog. REFERENCE OLD PART NO. NEW PART NO.
  • Page 221 CONNECTOR SPRING GENERAL: The part number and description were incorrect for the Connector Spring. The following part update is being issued for all A183 and A184 Parts Catalogs. Please correct your Parts Catalogs with the following information. REFERENCE INCORRECT PART NO.

This manual is also suitable for:

A184

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