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Ricoh Rex-Rotary A193 Service Manual

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A224 COPIER
SERVICE MANUAL
The A224 copier is based on the A193 copier.
Only the differences from the base copier are described
in the following pages. Therefore, this document should
be treated as an insert version of the base copier's
service manual, although it has a separate binder. It
should always be used together with the base copier's
service manual.

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Summary of Contents for Ricoh Rex-Rotary A193

  • Page 1 A224 COPIER SERVICE MANUAL The A224 copier is based on the A193 copier. Only the differences from the base copier are described in the following pages. Therefore, this document should be treated as an insert version of the base copier’s service manual, although it has a separate binder.

  • Page 2: Important Safety Notices

    IMPORTANT SAFETY NOTICES PREVENTION OF PHYSICAL INJURY 1. Before disassembling or assembling parts of the copier and peripherals, make sure that the copier power cord is unplugged. 2. The wall outlet should be near the copier and easily accessible. 3. Note that some components of the copier and the paper tray unit are supplied with electrical voltage even if the main switch is turned off.

  • Page 3: Safety And Ecological Notes For Disposal

    SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL 1. Do not incinerate toner bottles or used toner. Toner dust may ignite suddenly when exposed to an open flame. 2. Dispose of used toner, developer, and organic photoconductors in accordance with local regulations. (These are non-toxic supplies.) 3.

  • Page 4: Specifications

    25 April 1997 SPECIFICATIONS 1. SPECIFICATIONS Items A193 A224 Configuration: Desktop As for A193 Copy Process: Dry electrostatic transfer system As for A193 Originals: Sheet/Book As for A193 Original Size: Maximum: A3/11" x 17" Minimum: A5/8.5" x 5.5" sideways As for A193 (paper tray) A6/5.5"...
  • Page 5 SPECIFICATIONS 25 April 1997 Items A193 A224 First Copy Time Less than 9.8 s Less than 9.8 s (from 1st paper tray to (from 1st paper tray to face-down copy tray) face-down copy tray) Less than 8.8 s Less than 8.8 s (from 1st paper tray to (from 1st paper tray to face-up copy tray)
  • Page 6 25 April 1997 SPECIFICATIONS Power Consumption: - A193 - Mainframe Only Full System 120 V 220 V ~ 240 V 120 V 220 V ~ 240 V Maximum Less than 1.1 kW Less than 850 W Less than 1.2 kW Less than 1 kW Copying Approx.
  • Page 7 SPECIFICATIONS 25 April 1997 Copying Speed in Multicopy Mode: - A193 - A4 sideways/ A3/11" x 17" B4/8.5" x 14" 11" x 8.5" Non-memory copy mode Memory copy mode - A224 - A4 sideways/ A3/11" x 17" B4/8.5" x 14" 11"...

  • Page 8: Machine Configuration

    25 April 1997 MACHINE CONFIGURATION 2. MACHINE CONFIGURATION A224V501.wmf Machine Code Version Item A193 A224 Copy Copier A193 A224 ADF (Option) A628 ARDF (Option) A661 Platen Cover (Option) A645 Paper Tray Unit (Option) G697 Duplex Unit G694 (Option) Standard 1-bin Sorter (Option) A629 Finisher (Option) A666...

  • Page 9: Electrical Component Descriptions

    ELECTRICAL COMPONENT DESCRIPTIONS 25 April 1997 3. ELECTRICAL COMPONENT DESCRIPTIONS Refer to the electrical component layout and the point-to-point diagram on the waterproof paper in the pocket for the locations of these components. Index Symbol Description Note Printed Circuit Boards High Voltage Supply Supplies high voltage to the drum charge PCB1...
  • Page 10 25 April 1997 ELECTRICAL COMPONENT DESCRIPTIONS Index Symbol Description Note Detects when a new PCU is installed. Fusing Exit Detects misfeeds. Charge Roller H.P Informs the CPU when the drum charge roller is at home position. Upper Tray Paper Informs the CPU when the upper paper tray —- End (A193 only) runs out of paper.
  • Page 11 ELECTRICAL COMPONENT DESCRIPTIONS 25 April 1997 Index Symbol Description Note By-pass Feed Starts paper feed from the by-pass feed table. Upper Paper Feed Starts paper feed from the upper paper tray. —- (A193 only) Lower Paper Feed Starts paper feed from the lower paper tray. Registration Drives the registration rollers.

  • Page 12: Drive Layout

    25 April 1997 DRIVE LAYOUT Index Symbol Description Note Others Laser Detects the laser beam at the start of the LSD1 Synchronization main scan. Detector Noise Filter Removes electrical noise from the AC input (230V machine only) line. Circuit Breaker Guards against voltage surges in the AC (230V machine only) input line.

  • Page 13: Copy Process

    COPY PROCESS 25 April 1997 5. COPY PROCESS 5.1 OVERVIEW A224V503.wmf -1750 V Pow er Pack - 140 V - 90 V - 600V + 15 µA Pow er Pack - 1.8 kV (Front Side) - 2.1 kV (Rear Side) A224V500.wmf The separation (discharge brush) voltage has been changed.

  • Page 14: Main Scan Magnification/Reduction

    25 April 1997 MAIN SCAN MAGNIFICATION/REDUCTION 6. MAIN SCAN MAGNIFICATION/REDUCTION The specification of the reproduction ratios in the memory mode (binary picture processing mode) has been changed to 5 enlargement and 6 reduction. This is because the higher copy speed of this model causes poor copy quality at a reproduction ration of 25%.

  • Page 15: Laser Exposure

    LASER EXPOSURE 25 April 1997 7. LASER EXPOSURE 7.1 OVERVIEW The strength of the beam is 0.6 mW on the drum surface (10 mW output from the LDDR board) at a wavelength of 780 nm. The polygon motor speeds have been changed as follows: Resolution (dpi) Modes Motor Speed (rpm)

  • Page 16: Paper Feed

    25 April 1997 PAPER FEED 8. PAPER FEED 8.1 OVERVIEW A224D503.wmf This machine has a duplex unit as a standard component, so the following parts have been deleted. 1. Upper Paper Feed Rollers 3. Upper Paper End Sensor and Feeler 2.

  • Page 17: Drive Mechanism

    PAPER SEPARATION AND TRANSPORT 25 April 1997 8.2 DRIVE MECHANISM A224D502.wmf Drive transfers to the upper relay clutch [A] through the gear [B] instead of the paper feed clutch. 9. PAPER SEPARATION AND TRANSPORT The voltage for the discharge brush has been changed. •...

  • Page 18: Image Fusing

    25 April 1997 IMAGE FUSING 10. IMAGE FUSING 10.1 OVERVIEW 3, 4 A224D506.wmf Two new parts; fusing edge thermistor and antistatic brush have been added. The fusing edge thermistor is for over heat prevention at the end of the hot roller.

  • Page 19: Pressure Roller

    IMAGE FUSING 25 April 1997 10.2 PRESSURE ROLLER A224D207.wmf The pressure of the pressure roller can be changed in the same way as for the A193 machine. It is done by adjusting the position of the pressure springs [A]. In this machine, the fusing pressure can also be adjusted with the lever handle [B] (this is a finer adjustment than the pressure springs).

  • Page 20: Fusing Unit Fan

    25 April 1997 IMAGE FUSING 10.3 FUSING UNIT FAN A224D505.wmf The fusing unit fan [A] has been added below the fusing unit. The fusing unit fan is necessary because the wattage of the fusing lamp is higher than in the A193 machine, as a result of the higher copy speed.
  • Page 21 IMAGE FUSING 25 April 1997 10.4 FUSING TEMPERATURE CONTROL AND OVERHEAT PROTECTION A224D504.wmf The fusing control type can be either phase control or on-off control, depending on an SP mode setting. The fusing edge thermistor [A] has been added. It measures the temperature at the end of the hot roller.

  • Page 22: Energy Saver Modes

    25 April 1997 ENERGY SAVER MODES 11. ENERGY SAVER MODES Basically, the function and performance of the energy saver mode in all machine configurations, except the copier configuration for the 230V machine, are the same as for the A193 machine. The following are the items which have been changed.

  • Page 23: Service Program Mode Table

    SERVICE PROGRAM MODE TABLE 9 May 1997 12. SERVICE PROGRAM MODE TABLE 12.1 MAIN SP MODE TABLE NOTE: 1) A “#” mark after the mode number means that this SP mode is only used for the A193 machine. 2) A “##” mark after the mode number means that this SP mode is only used for the A224 machine.
  • Page 24 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Side-to-Side Adjusts the printing side-to-side +9 ~ -9 Registration registration from the 3rd paper feed 1 mm/step (3rd paper station using the Trimming Area Pattern + 0.0 mm feed: Option (SP5-902, No.10).
  • Page 25 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Fusing Selects the fusing temperature control 0: On/Off 1-104 * Temperature mode. 1: Phase Control Fusing Adjusts the fusing temperature in the 100 ~ 200 Temperature operation mode.
  • Page 26 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Left Side Adjusts the left side erase margin. 0 ~ 9 The specification is 2 ± 1.5 mm. See Edge Erase 1 mm/step Margin 2.0 mm “Replacement and Adjustment - Copy...
  • Page 27 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 TD Sensor Performs the TD sensor initial setting. 0: No Initial Setting This SP mode controls the voltage 1: Yes applied to the TD sensor to make the TD 2-801 sensor output about 2.0 V.
  • Page 28 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 LD PWM Selects the laser pulse positioning type 0: Center Laser Pulse that is used for the the leftmost pixel of a 1: Right Positioning series of black or gray pixels.
  • Page 29 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Forced Toner Forces the toner bottle to supply toner to 0: No Supply the toner supply unit for 1.5 minutes. 1: Yes Toner supply finishes automatically after 2-908 1.5 minutes.
  • Page 30 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Factory Displays what the total counter value was when the TD sensor control value was CONT Counter adjusted in the factory. 2-995* When V is adjusted at the factory, CONT the counter is automatically set at...
  • Page 31 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Leading Edge Adjusts the leading edge registration for - 2.0 ~ + 9.0 Registration scanning. 0.5 mm/step (Scanning) + 0.0 mm (-): The image moves in the direction of 4-010 * the leading edge Use the •/∗...
  • Page 32 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Sub Scan Adjusts the magnification in the sub scan - 1.0 ~ + 1.0 Magnification direction for scanning. 0.5 %/step (Scanning: If this value is changed, the scanner + 0.0 % 4-101* Book Mode)
  • Page 33 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 MTF Filter Selects the MTF filter level for Letter 0 ~ 11 Selection in mode. A stronger filter gives sharper lines. 1/step Letter Mode For how to adjust, refer to “Detailed (65% ~ 154%) Descriptions - Filtering and Main Scan...
  • Page 34 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 MTF Filter Selects the MTF filter level for Letter 0 ~ 11 Selection in mode (binary picture mode). A stronger 1/step Letter Mode - filter gives sharper lines.
  • Page 35 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Dither Pattern Selects the dither pattern used in 0: 180-line Selection grayscale processing mode. 1: 140-line (Grayscale 2: 95-line A greater number of lines gives a more Mode/Photo detailed copy.
  • Page 36 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Scanner Selects the scanner motor control method. 0: Normal Motor Control 1: Special If “1" is selected, the current for the 4-910* Method scanner motor will be reduced and jitter copy image problems will be alleviated.
  • Page 37 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 MTF Filter Selects the MTF filter level for Letter 0 ~ 11 Selection in mode (binary picture mode) at notch 4 1/step Letter Mode - image density level.
  • Page 38 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Threshold Selects the threshold level for Letter 0 ~ 255 Level in Letter mode (binary picture mode) at notch 4 1/step Mode - Binary image density level.
  • Page 39 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 User Code Selects whether the user code function is 0: No Mode enabled in copy mode or not. 1: Yes (Copier) If this value is changed, the UP mode setting is also changed.
  • Page 40 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Free Run Performs a free run for both the scanner 0: No and the printer. 1: Yes 5-802 To perform the free run, press 1 then press twice.
  • Page 41 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Printer Free Performs the printer free run. 0: No 5-901 1: Yes To perform the free run, press 1 then press twice. Press to stop.
  • Page 42 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 PCU Alarm Inputs the PCU alarm interval. 1 ~ 255 Interval 1 k / Step When the machine reaches the value, 45 k “Change Photoconductor Unit”...
  • Page 43 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Memory Copy Selects whether or not the memory copy 0: No 5-945* Priority mode is selected when the main switch is 1: Yes turned on.
  • Page 44 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Stamp Adjusts the stamp position in the - 10 ~ + 10 6-010* Position sub-scan direction in facsimile mode. 1 mm/step Adjustment 0 mm ADF Original Displays the status of the original sensor Sensor Output...
  • Page 45 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Total Displays the total operation time (total 7-001 Operation drum rotation time). Time Display Total Original Displays the total number of scanned Counter originals (copy + fax modes).
  • Page 46 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Total Copies Displays the total number of copies by by Paper Size paper size. “ x 5 ”) 7-101* Total Copies by Paper Size (Other Size) Total Number Displays the total number of scanned...
  • Page 47 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Total Copies Displays the total number of copies by reproduction ratio. Reproduction Ratio (25% ~ 49%) Total Copies Reproduction Ratio (50% ~ 99%) Total Copies Reproduction Ratio (Full...
  • Page 48 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Total Copies Japanese version only. 1 ~ 23 by Image Editing Mode Total Copies Displays the total number of copies by by Image image editing mode.
  • Page 49 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Total Original Displays the total number of original jams. 7-503* Jam Counter Total Jams by Displays the total copy paper jam Location counters by location. (A Jams) Total Jams by Location...
  • Page 50 9 May 1997 SERVICE PROGRAM MODE TABLE Mode No. Function Settings Class Class 3 1 and 2 Total Jams by Displays the total copy paper jam Location counters by location. (By-pass 7-504* Feed) Total Jams by 15 ## Location (Duplex Tray) ROM/CPU Displays the ROM version.
  • Page 51 SERVICE PROGRAM MODE TABLE 9 May 1997 Mode No. Function Settings Class Class 3 1 and 2 Resets Resets the counters except for the 0: No Counters following counters: 1: Yes (except for the 1. Total counter (SP7-003) total counter) 2.
  • Page 52 9 May 1997 SERVICE PROGRAM MODE TABLE 12.1.1 Input Check (SP5-803) A224M500.wmf 1. Access SP mode 5-803. 2. Select the number which will access the switch or sensor you wish to check (see the following table). 3. Check the status of the sensor or switch. 4.
  • Page 53 SERVICE PROGRAM MODE TABLE 9 May 1997 Reading Number Description Upper Paper Size Sensor -A193 only- See Table 1 Lower Paper Size Sensor See Table 1 Main Motor Lock Not locked Locked PCU ensor PCU not PCU detected detected Not used Upper Paper End Sensor Paper not Paper detected...
  • Page 54 9 May 1997 SERVICE PROGRAM MODE TABLE Reading Number Description Original Set Sensor (Optional ADF and ADRF) Paper not Paper detected detected DF Position Sensor (Optional ADF and ARDF) DF closed DF opened Registration Sensor (Optional ADF and ARDF) Paper not Paper detected detected ADF Set (Optional ADF)
  • Page 55 SERVICE PROGRAM MODE TABLE 9 May 1997 Table 1: Paper Size Data (No. 15, 16, 27, and 28) SW No. 1 A224M502.wmf Number SW 1 SW 2 SW 3 SW 4 Paper Size Value —- A3, F(8 “ x 13") A4 Sideways A4 Lengthwise 15,16,27,28...
  • Page 56 9 May 1997 SERVICE PROGRAM MODE TABLE 12.1.2 Output Check (SP5-804) A224M501.wmf CAUTION: To prevent mechanical or electrical damage, do not keep an electrical component on for a long time. 1. Access SP mode 5-804. 2. Select the SP number that corresponds to the component you wish to check (see the following table), then press 3.
  • Page 57 SERVICE PROGRAM MODE TABLE 9 May 1997 Description Description Lower Paper Lift Motor (Down) Not used (Optional Paper Tray Unit) Not used Duplex Junction Gate Solenoid ARDF Junction Gate Solenoid (Optional Duplex Unit) (Optional ARDF) Not used ARDF Transport Motor (Foward) (Optional ARDF) ARDF Transport Motor (Reverse) (Optional ARDF)

  • Page 58: Preventive Maintenance Schedule

    9 May 1997 PREVENTIVE MAINTENANCE SCHEDULE 13. PREVENTIVE MAINTENANCE SCHEDULE 13.1 PM TABLE NOTE: The amounts mentioned as the PM interval indicate the number of prints. Symbol key: C: Clean, R: Replace, L: Lubricate, I: Inspect A224 100K 200K 300K NOTE SCANNER/OPTICS Reflector...
  • Page 59 PREVENTIVE MAINTENANCE SCHEDULE 9 May 1997 A224 100K 200K 300K NOTE Hot Roller Strippers Cleaning Roller Discharge Brush OTHERS Drive Belts Replace if necessary 200K 400K 600K 800K NOTE Paper Feed Roller Dry or damp cloth Transport Roller Dry or damp cloth Bottom plate pad Dry or damp cloth...

  • Page 60: Replacement And Adjustment

    9 May 1997 REPLACEMENT AND ADJUSTMENT 14. REPLACEMENT AND ADJUSTMENT 14.1 LASER UNIT WARNING Turn off the main switch and unplug the machine before attempting any of the procedures in this section. Laser beams can seriously damage your eyes. - CAUTION DECALS - Three caution decals and the optical fiber cable [A] are located in the laser section as shown below.
  • Page 61 REPLACEMENT AND ADJUSTMENT 9 May 1997 14.2 LASER UNIT/MAIN SCAN SYNCHRONIZATION DETECTOR A224R512.wmf WARNING Turn off the main switch and unplug the machine before attempting any of the procedures in this section. Laser beams can seriously damage your eyes. 1. Remove the copy tray. 2.

  • Page 62: Polygon Mirror Motor

    9 May 1997 REPLACEMENT AND ADJUSTMENT 14.3 POLYGON MIRROR MOTOR A224R501.wmf 1. Remove the laser unit (see Laser Unit/Main Scan Syncronization Detector). 2. Remove the polygon motor cover [A] (3 screws). 3. Remove the polygon motor [B] (4 screws, 1 connector). NOTE: When reinstalling the polygon motor, the securing order should be as shown below.
  • Page 63 REPLACEMENT AND ADJUSTMENT 9 May 1997 14.4 POLYGON MOTOR DRIVER A224R502.wmf 1. Remove the copy tray. 2. Disconnect two harnesses [A] from the polygon motor driver [B]. 3. Remove the polygon motor driver bracket [C] (1 screw). 4. Remove the polygon motor driver [B] (3 screws).
  • Page 64 9 May 1997 REPLACEMENT AND ADJUSTMENT 14.5 FUSING THERMISTOR/FUSING EDGE THERMISTOR A224R511.wmf 1. Pull out the fusing unit (1 screw). 2. Remove the upper cover [A] (1 screw). 3. Remove the fusing thermistor [B] (1 screw, 1 connector). 4. Remove the fusing edge thermistor [C] (1 screw, 1 connector).
  • Page 65 REPLACEMENT AND ADJUSTMENT 9 May 1997 14.6 FUSING UNIT FAN A224R503.wmf A224R504.wmf 1. Remove the front cover and rear cover. 2. Remove the PCU, transfer roller unit, fusing unit, duplex inverter unit, duplex unit, paper feed tray, and inner cover. 3.

  • Page 66: Service Call Conditions

    9 May 1997 SERVICE CALL CONDITIONS 15. SERVICE CALL CONDITIONS 15.1 SUMMARY There are 3 levels of service call conditions. Level Definition To prevent the machine from being damaged, the SC can only be reset by a service representative (see the note below). The copier cannot be operated at all.

  • Page 67: Sc Code Descriptions

    SC CODE DESCRIPTIONS 9 May 1997 16. SC CODE DESCRIPTIONS SC101: Xenon lamp error (A193/A224) - Definition - [B] The standard white level was not detected properly when scanning the white plate. - Possible cause - • Xenon lamp defective •...
  • Page 68 9 May 1997 SC CODE DESCRIPTIONS SC122: Scanner home position error 3 (A193/A224) -Definition- [B] The scanner home position sensor detects the on condition while the scanner is returning to the home position. - Possible causes - • Scanner home position sensor defective •...
  • Page 69 SC CODE DESCRIPTIONS 9 May 1997 SC302: Charge roller current leak (A193/A224) -Definition- [B] A charge roller current leak signal is detected. - Possible causes - • Charge roller damaged • Charge high voltage supply board defective • Poor connection of the PCU SC306: Charge roller home position error (A193/A224) -Definition- [B] The charge roller home position sensor does not detect the on condition.
  • Page 70 9 May 1997 SC CODE DESCRIPTIONS SC322: Laser synchronization error (A193/A224) -Definition- [B] The laser synchronization signal cannot be detected by the main scan synchroniziation detector board for more than 5 consecutive 100 ms intervals. - Possible causes - • Poor connection of the interface harness which connects the laser synchronization detector board and the BiCU board •...
  • Page 71 SC CODE DESCRIPTIONS 9 May 1997 SC393: TD sensor error 2 (A193/A224) -Definition- [B] TD sensor output voltage falls out of the adjustment range (2.0 ± 0.2 V) after the TD sensor initial setting has been finished. - Possible causes - •...
  • Page 72 9 May 1997 SC CODE DESCRIPTIONS SC503: Upper tray lift motor malfunction (optional paper tray unit only) (A193/A224) SC504: Lower tray lift motor malfunction (optional paper tray unit only) (A193/A224) -Definition- [C] The paper upper limit sensor is not activated after the tray lift motor has been on for 10 seconds.
  • Page 73 SC CODE DESCRIPTIONS 9 May 1997 SC543: Fusing overheat error (A193/A224) -Definition- [A] A fusing temperature of over 231°C is detected for 1 second by the fusing thermistor. - Possible causes - • Fusing thermistor defective • Power supply board defective SC544: Fusing low temperature error (A193/A224) -Definition- [A] A fusing temperature of below 100°C is detected for 1 second by the fusing...
  • Page 74 9 May 1997 SC CODE DESCRIPTIONS SC548: Fusing edge temperature error 1 (A224) - Definition - [A] A fusing temperature of over 251°C is detected for 3 seconds by the fusing edge thermistor. - Possible causes - • Fusing edge thermistor defective •...
  • Page 75 SC CODE DESCRIPTIONS 9 May 1997 SC682: Printer option version error (A224) - Definition - [C] The machine detected that a A643 printer controller is installed. - Possible causes - • Installing an A643 printer controller in an A224 machine. •...
  • Page 76 9 May 1997 SC CODE DESCRIPTIONS SC696: Communication error between finisher and BiCU board (A193/A224) - Definition - [B] The BiCU board cannot communicate with the finisher properly. - Possible causes - • Poor connection of the interface cable for the finisher. •...
  • Page 77 SC CODE DESCRIPTIONS 9 May 1997 SC701: Finisher inverter error (A193/A224) - Defenition - [B] 1. The jogger H.P sensor does not detect the off condition within 3 seconds after the jogger motor is turned on. 2. The jogger H.P sensor does not detect the on condition within 576 pulses (about 80 mm) after the jogger motor is turned on.
  • Page 78 9 May 1997 SC CODE DESCRIPTIONS SC920: MSU connection error (A193/A224) -Definition- [B] The MSU set signal is not detected - Possible cause - • Poor connection between the BICU board and the MSU • BICU board defective • MSU defective SC921: MSU hardware error (A193/A224) -Definition- [B] The hardware of the MSU is defective...
  • Page 79 SC CODE DESCRIPTIONS 9 May 1997 SC990: Communication error between BICU and IOCSS board (A193/A224) -Definition- [B] The BiCU board cannot communicate with the IOCSS board properly. - Possible cause - • Poor connection between the BiCU board and the IOCSS board •...

  • Page 80: Electrical Component Layout

    ELECTRICAL COMPONENT LAYOUT Copier (A224) A224s502.wmf...
  • Page 81 A224s501.wmf...
  • Page 82 A224s500.wmf...
  • Page 83 Copier Symbol Index No. Description P to P (2/2) Printed Circuit Boards PCB1 High Voltage Supply Board PCB2 Lamp Stabilizer PCB3 PCB4 LD Unit PCB5 Operation Panel PCB6 PCB7 IOCSS PCB8 BICU PCB9 PCB10 Polygon Motor Driver (A224 only) Motors Main Scanner Drive Transport Vacuum Fan...
  • Page 84 Symbol Index No. Description P to P (2/2) Main Right Vertical Guide —- Upper Paper Size (A193 only) Lower Paper Size Front Door Safety Magnetic Clutches Charge Roller Contact Upper Relay Lower Relay By-pass Feed —- Upper Paper Feed (A193 only) Lower Paper Feed Registration Development...
  • Page 85 A193 and A224 (Ver. 2) Point to Point Diagram Duplex Unit (Option for A193) AC SW (SW1) (1/2) Duplex Entrance Sensor Duplex Junction Gate Sol SOL1 Duplex Transport Circuit Breaker Motor (230V machine only) (CF1) Duplex Turn Sensor Duplex Feed Duplex Exit Tray Heater Motor...
  • Page 86 A193 and A224 Point to Point Diagram +24V COM3 RSEL(US-Not used) (2/2) Not used DOSW [ 5] (US - Not used) CMLSW [ 5] OHDISW [ 5] COM1 EXTDI [ 5] HOOK1 [ 5] HOOK0 [ 5] BICU EXRING Table 1 COM2 Not used TRXD (Tx/Rx Signal)

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