Xerox WorkCentre 385 Page 135 Service Manual Download

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Introduction

WorkCentre 385

12/98

7 - 1

7 Theory of Operation

Section Contents

Title

Page

Introduction - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Connection Diagram - - - - - - - - - - - - - - - - - - 7-2
System Block Diagram - - - - - - - - - - - - - - - - - 7-3
Engine Configuration - - - - - - - - - - - - - - - - - - 7-4

Video Controller PBA  - - - - - - - - - - - - - - - 7-4
Engine Controller PBA  - - - - - - - - - - - - - - 7-4
HVPS PBA- - - - - - - - - - - - - - - - - - - - - - - 7-4
Joint PBA- - - - - - - - - - - - - - - - - - - - - - - - 7-4
Laser Printer Cartridge  - - - - - - - - - - - - - - 7-4
LSU (Laser Scanner Unit) - - - - - - - - - - - - 7-4
Transfer - - - - - - - - - - - - - - - - - - - - - - - - - 7-4
Fuser- - - - - - - - - - - - - - - - - - - - - - - - - - - 7-4

Development Processing - - - - - - - - - - - - - - - 7-5

Charging  - - - - - - - - - - - - - - - - - - - - - - - - 7-5
Exposure - - - - - - - - - - - - - - - - - - - - - - - - 7-5
Development  - - - - - - - - - - - - - - - - - - - - - 7-5
Transfer - - - - - - - - - - - - - - - - - - - - - - - - - 7-6
Fixing  - - - - - - - - - - - - - - - - - - - - - - - - - - 7-6
Exit - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-6

Circuit Description - - - - - - - - - - - - - - - - - - - - 7-7

Main PBA - - - - - - - - - - - - - - - - - - - - - - - 7-7

MFP Controller (KS32C6100: U1) - - - - - 7-8
Reset Circuit - - - - - - - - - - - - - - - - - - - 7-26
Power Monitor (U35: KIA7045AP) - - - - 7-28
Watch Dog Output (/RSTO)- - - - - - - - - 7-28
Memory- - - - - - - - - - - - - - - - - - - - - - - 7-28
Modem, TX & RX Related Circuits - - - - 7-28
SCAN_IP Block Diagram - - - - - - - - - - 7-36

Scanner - - - - - - - - - - - - - - - - - - - - - - - - 7-40

CIS Driver, Input Processor - - - - - - - - - 7-40

OPE PBA- - - - - - - - - - - - - - - - - - - - - - - 7-41
LIU PBA - - - - - - - - - - - - - - - - - - - - - - - 7-42

Modem/Line Interface- - - - - - - - - - - - - 7-42
Ring Signal Detector  - - - - - - - - - - - - - 7-42
Dialer  - - - - - - - - - - - - - - - - - - - - - - - - 7-42
Line Current Detector - - - - - - - - - - - - - 7-43
Serial Interface  - - - - - - - - - - - - - - - - - 7-43
Major Functions Of Parts  - - - - - - - - - - 7-43

SMPS (Switching Mode Power Supply) - 7-44

AC Input Stage - - - - - - - - - - - - - - - - - 7-44

SMC (Switched Mode Control) - - - - - - 7-44
Fuser Drive - - - - - - - - - - - - - - - - - - - - 7-44

Engine Controller - - - - - - - - - - - - - - - - - 7-45

H.V.P.S (High Voltage Power Supply) - - - 7-47

Output Specifications - - - - - - - - - - - - - 7-47
Transfer High Voltage(THV) - - - - - - - - 7-47
Main and Bias High Voltage - - - - - - - - 7-47

Introduction

This section contains the theory of operation. This
information is not specific to individual procedures
but is provided for general reference.

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Summary of Contents for WorkCentre 385

Page 1: ...Transmittal Page Product WorkCentre 385 Title Service Manual Part Number 701P14250 Status Initial Issue Date Dec 1998 www printcopy info w w w p r i n t c o p y i n f o...

Page 2: ...www printcopy info w w w p r i n t c o p y i n f o...

Page 3: ...Binder Inserts Cut on the dotted lines WorkCentre 385 Service Manual WorkCentre 385 Service Manual www printcopy info w w w p r i n t c o p y i n f o...

Page 4: ...www printcopy info w w w p r i n t c o p y i n f o...

Page 5: ...nvisible laser radiation Certain components in this product are susceptible to damage from electrostatic discharge Observe all ESD procedures to avoid component damage DANGER AVOID DIRECT EXPOSURE TO...

Page 6: ...ny otherwise applicable Xerox warranties If Customer services such equipment modules components or parts thereof Customer releases Xerox from any and all liability for actions by the Customer and Cust...

Page 7: ...33 12 98 4 34 12 98 4 35 12 98 4 36 12 98 4 37 12 98 4 38 12 98 4 39 12 98 4 40 12 98 4 41 12 98 4 42 12 98 4 43 12 98 4 44 12 98 4 45 12 98 4 46 12 98 4 47 12 98 4 48 12 98 4 49 12 98 4 50 12 98 5 1...

Page 8: ...1 2 Repair Procedures 2 1 Section Contents 2 1 3 Image Quality Repair Procedures 3 1 Section Contents 3 1 4 Repair Adjustment 4 1 Section Contents 4 1 5 Parts Lists 5 1 Section Contents 5 1 6 General...

Page 9: ...duct specifications Section 7 Theory of Operation This section contains illustrations timing diagrams circuit descriptions and lists of the signals and connectors Terminology and Symbols The following...

Page 10: ...ate and local laws it may be illegal to dispose of these items into the municipal waste stream Check with your local solid waste officials for details in your area for recycling options or proper disp...

Page 11: ...Cradle 1 3 Printer Exit Tray 1 4 Telephone Line 1 5 Extension Phone 1 5 Parallel Cable 1 6 AC Power Cord 1 6 Laser Printer Cartridge 1 7 Not available in all markets Introduction This section provide...

Page 12: ...he extender on the tray if necessary Document Exit Tray 1 Insert the two tabs on the document exit tray into the slots on the front of your machine Fold out the extender if necessary Insert one end fi...

Page 13: ...the handset cradle 2 Plug the cradle s modular cords into the modular jacks on the left side of your machine 3 Attach the Handset Cradle to the main body Insert the three tabs of the cradle into the s...

Page 14: ...it down and towards the front of the machine then take it out Printer Exit Tray 1 Holding the flexible side end insert two tabs on the side ends into the corresponding slots Fold out the extender if n...

Page 15: ...f you want to use a regular phone or answering machine with your Work Centre 385 machine connect the phone into the EXT LINE jack Plug the cord of your extension phone or answering machine into the so...

Page 16: ...able into the connector on the back of the printer Push the metal clips to fit inside the notches on the cable plug 3 Connect the other end of the cable to the parallel interface port on your computer...

Page 17: ...1 Pull the cover release buttons toward you open the cover 2 Unpack the cartridge then carefully remove the sealing tape 3 Shake the cartridge from side to side 5 or 6 times to distribute the toner ev...

Page 18: ...Cord 12 98 1 8 4 Find the cartridge slots inside the printer one on each side 5 Grasp the handle and slide the cartridge down between the cartridge slots until it drops into place 10 98 www printcopy...

Page 19: ...Printer Cable AC Power Cord 12 98 1 9 WorkCentre 385 6 Close the cover Make sure that the cover is securely closed www printcopy info w w w p r i n t c o p y i n f o...

Page 20: ...WorkCentre 385 12 98 1 10 www printcopy info w w w p r i n t c o p y i n f o...

Page 21: ...2 4 Repair Flow Procedures General Troubleshooting Reference 2 6 No Power No LCD Display and LED off 2 9 Fuser Error 2 10 Paper Jam mis feeding 2 11 Paper Jam Jam 1 2 12 Introduction This section pro...

Page 22: ...ions for a multi dial operation Try again check location for group LINE ERROR Your unit cannot connect with the remote machine or has lost contact because of a problem on the phone line Try again If f...

Page 23: ...R When setting up to poll another fax machine you ve used an incorrect poll code Enter the correct poll code POLLING ERROR The remote fax machine you want to poll is not ready to respond to your poll...

Page 24: ...eck for mechanical problem in top cover and lever assembly If ok check for electrical problem Jam 0 See also Paper Jam mis feed ing Trouble shooting flow Check where Jam 0 occurs 1 Paper is not picked...

Page 25: ...r Front and check if roller or spring which are related to paper feed are out of position If yes re locate or replace Clutch error 1 Check the solenoid spring 2 Check the armature assembly cushion 3 E...

Page 26: ...se 1 Sensor PBA 2 Joint PBA 3 Engine PBA 4 Main PBA Paper Feed Motor Turns Yes No Possible Cause 1 Motor 2 Joint PBA 3 Engine PBA 4 Main PBA Check for Paper Feed blockage Yes No A Send A FAX No Yes B...

Page 27: ...Prints From PC No Yes Possible Cause 1 Main PBA Parallel Cable connected to PC No Yes Connect Parallel Cable Possible Cause 1 Laser Printing Cartridge 2 LSU Unit 3 HVPS PBA 4 Joint PBA 5 Engine PBA 6...

Page 28: ...A Yes Document Feeds Yes No Document Sensed Possible Cause 1 CIS 2 Scan PBA 3 Main PBA No Yes Possible Cause 1 Motor 2 Scan PBA 3 Main PBA No Possible Cause 1 OPE PBA 2 Scan PBA 3 Main PBA C Telephone...

Page 29: ...ower is on Connections on SMPS PBA are OK Laser Printer Cartridge is inserted Insert cartridge Replace the SMPS PBA Replace the OPE PBA REP 4 5 REP 4 17 then the Engine PBA REP 4 17 then the Main PBA...

Page 30: ...is less than 10 ohms Replace the Halogen Lamp REP 4 28 then the Thermostat REP 4 29 AC power is being supplied Replace the Engine PBA REP 4 17 then the Thermistor REP 4 29 Check wiring then replace t...

Page 31: ...A The paper moves The print solenoid unit clutch engages when printing starts Reduce the amount of paper and re test Adjust the paper guides Paper guides are adjusted properly Paper end curled The ext...

Page 32: ...nd the pressure roller Remove the fuser remove the paper and replace the pressure roller if necessary Replace LSU Unit REP 4 14 Severe skew when feeding The paper came out between fuser and developer...

Page 33: ...cedures No Image 3 6 All Black 3 7 Vertical White Line Band 3 8 Dark Image 3 9 Background 3 10 Ghost 3 11 Black Dot 3 12 Horizontal Band 3 13 Irregular Density 3 14 White Spot 3 15 Blurred Image OHP O...

Page 34: ...g attached frame Confirm that ground is connected properly 3 Replace LSU 4 Shake Laser Printer Cartridge and print If image is a little better Laser Printer Cartridge is empty 5 Replace Scan PBA Light...

Page 35: ...Fuser after it warms up 3 Replace Fuser Lamp then Thermistor Partial blank image not periodic 1 Laser Printer Cartridge is low or out of position 1 Replace Laser Printer Cartridge Partial blank image...

Page 36: ...age contact 2 Charge roller s contaminated 3 Contamination of heat roller 4 Malfunction of LSU 1 Clean each contact and check for good contact pressure 2 Clean charge roller 3 Replace fuser unit or da...

Page 37: ...normal image 1 OPC Drum 96 2mm White spot 2 Charge Roller 37 7mm Black spot 3 Supply Roller 31 3mm Horizontal density band 4 Developer Roller 46 1mm Horizontal density band 5 Transfer Roller 47 1mm Bl...

Page 38: ...then the LSU Unit REP 4 14 then the Engine PBA REP 4 17 then the HVPS PBA REP 4 23 then the Main PBA REP 4 19 No Print Image Self test pattern prints Check connection to computer then replace the Main...

Page 39: ...orkCentre 385 All Black Replace the Laser Printer Cartridge then the LSU Unit REP 4 14 then the Engine PBA REP 4 17 then the HVPS PBA REP 4 23 then the Main PBA REP 4 19 www printcopy info w w w p r i...

Page 40: ...mination in fuser area causing white band Replace the Laser Printer Cartridge then the LSU Unit REP 4 14 Clean the Fuser Area Clean the paper path and LSU Optical Path Then replace the Laser Printer C...

Page 41: ...385 Dark Image Dark selected via Control Panel Change to Normal and re test Same at Normal setting End Replace the Laser Printer Cartridge then the LSU Unit REP 4 14 NO YES YES NO www printcopy info...

Page 42: ...L 3 1 then the Joint PBA REP 4 20 then Replace the Laser Printer Cartridge then the LSU Unit REP 4 14 then the HVPS PBA REP 4 23 then the Engine PBA REP 4 17 then the Main PBA REP 4 19 NO YES Main PBA...

Page 43: ...WorkCentre 385 Ghost Replace the ELA Unit PTL PL 3 1 PTL Lamp works OK Replace the Laser Printer Cartridge then the LSU Unit REP4 14 then the HVPS PBA REP 4 23 NO YES www printcopy info w w w p r i n...

Page 44: ...WorkCentre 385 Black Dot 12 98 3 12 Black Dot Fuser contaminated YES NO Clean or replace defective Fuser Replace Laser Printer Cartridge components www printcopy info w w w p r i n t c o p y i n f o...

Page 45: ...REP 4 14 Band appears every 56 1 mm 94mm interval Check contacts of Laser Printer Cartridge then replace the Laser Printer Cartridge then the HVPS Heat roller is defective replace the Fuser Assembly R...

Page 46: ...EP 4 39 Density is now OK Remove Laser Printer Cartridge and shake from side to side End PTL Lamp works Properly Contamination on the PTL Lamp Clean the PTL Lamp Replace the LSU Unit REP 4 14 Replace...

Page 47: ...pot 12 98 3 15 WorkCentre 385 White Spot Occurs every 94mm Replace Laser Printer Cartridge then the HVPS PBA REP 4 23 Replace Laser Printer Cartridge NO YES www printcopy info w w w p r i n t c o p y...

Page 48: ...inserted into the MPF When OHP printing the fan stops turning temporarily End Other components may be touching the fan and preventing it from turning Check for blockage and repair Reduce the number o...

Page 49: ...mostat REP 4 29 then the Halogen Lamp REP 4 28 then the Engine PBA REP 4 17 Check the hardness of the Pressure Roller and the Spring tension then replace the Pressure Roller REP 4 25 then the NO YES r...

Page 50: ...WorkCentre 385 12 98 3 18 www printcopy info w w w p r i n t c o p y i n f o...

Page 51: ...er Roller 4 19 REP 4 21 Sensor PBA 4 25 REP 4 23 HVPS PBA 4 27 REP 4 25 Pressure Roller 4 30 REP 4 27 Pickup Roller 4 32 REP 4 30 Exit Lower Unit 4 38 REP 4 31 Speaker Assembly 4 39 REP 4 32 Solenoid...

Page 52: ...ou remove any parts The close proximity of cables to moving parts makes proper routing a must All cables disturbed by the removal procedure must be replaced as close as possible to their original posi...

Page 53: ...everse order REP 4 2 White Roller Removal 1 Lift the control panel using hand 2 Push the bushing on both ends of the roller slightly inward then rotate it until it reaches the slot Then lift the rolle...

Page 54: ...12 98 4 4 REP 4 3 OPE Cover Removal 1 Remove Front Cover REP 4 11 2 Remove two screws then remove the Scan Cover 3 Unplug the OPE connector from the Scan PBA and remove ground screw www printcopy info...

Page 55: ...nd 5 Remove the stopper holding the OPE Cover 6 Unlatch the bottom ends then remove the OPE cover 7 Remove ground wire from routing tabs on back of OPE cover Replacement 1 Reinstall the components in...

Page 56: ...Insert a small flat blade screw driver at right and left cut out in ADF Holder to release locking tabs on each side of ADF Rubber Replacement 1 Reinstall the components in the reverse order ADF Holder...

Page 57: ...remove the scan upper frame 3 Remove eleven screws securing the PBA then remove the PBA Note Remove screws in numeric order Do not turn OPE over after removing screws and OPE PBA Note When replacing s...

Page 58: ...per frame 3 Turn the scan upper frame over and remove three screws Then remove the Sensor bracket pinch spring and pinch roller To remove the pinch roller push up from the bottom side Replacement 1 Re...

Page 59: ...the following a Front Cover REP 4 11 2 Remove two screws then remove the scan cover 3 Unplug all connectors from the scan PBA remove one screw then remove the PBA Replacement 1 Reinstall the componen...

Page 60: ...OPE Cover REP 4 3 c White Roller REP 4 2 2 Open the control panel then remove four screws 3 Lift the scan lower frame up 4 Remove three rollers Use extreme caution when you remove rollers to prevent...

Page 61: ...the Scan Lower Frame using the instructions for Rollers REP 4 8 2 Remove two screws securing the motor unplug the motor connector from the scan PBA then remove the motor Replacement 1 Reinstall the co...

Page 62: ...10 CIS Removal 1 Remove the CIS using the instructions for Rollers REP 4 8 2 Remove one screw unplug one connector then remove the CIS Replacement 1 Reinstall the components in the reverse order www p...

Page 63: ...Printer Exit Tray 3 Pull the cover release button on both sides of the machine and open the front cover 4 Remove the duct cover 5 Remove the cover stopper securing the OPE unit To remove the stopper...

Page 64: ...en the cover Pull the bottom left end of the cover toward you to unlatch the OPE cover and take it out 7 Disconnect the ground wire and connector Replacement 1 Reinstall the components in the reverse...

Page 65: ...WorkCentre 385 REP 4 12 Rear Cover Removal 1 Remove three screws 2 Unlatch the bottom ends then remove the rear cover Replacement 1 Reinstall the components in the reverse order www printcopy info w...

Page 66: ...ve the following a Rear Cover REP 4 12 2 Pull the cover release button on both sides of the machine and open the front cover 3 Remove two screws 4 Remove the top cover Replacement 1 Reinstall the comp...

Page 67: ...move the following a Top Cover REP 4 13 2 Remove four screws unplug 2 connectors from the LSU then remove the LSU Replacement 1 Reinstall the components in the reverse order 6 pin connector on side 5...

Page 68: ...Cover REP 4 11 b Top Cover REP 4 13 c Handset Cradle REP 4 1 if attached 2 Remove two screws 3 Spread the rear bottom to unlatch the rear side then pull the covers in the direction of the arrow Repla...

Page 69: ...Laser Printer Cartridge 2 Pull the cover release button on both sides of the machine and open the front cover 3 Press the latches at both ends of the roller then remove the roller Replacement 1 Reins...

Page 70: ...gine Controller PBA Removal 1 Remove the following a LIU PBA REP 4 18 b Main PBA REP 4 19 2 Turn the machine over 3 Remove three screws securing the shield then remove the shield 4 Remove seven screws...

Page 71: ...e Controller PBA 12 98 4 21 WorkCentre 385 5 Unplug four connectors then remove the SMPS and the engine PBA Replacement 1 Reinstall the components in the reverse order www printcopy info w w w p r i n...

Page 72: ...ne over 2 Remove three screws securing the shield then remove the shield 3 Unplug all connectors from the PBA remove the three screws and the ground wire then remove the PBA Replacement 1 Reinstall th...

Page 73: ...the Xerox premises for disposal in accordance with local regulations Removal 1 Remove the following a LIU PBA REP 4 18 2 Unplug all connectors from the Main PBA 3 Remove two screws from the PBA 4 Remo...

Page 74: ...4 20 Joint PBA Removal 1 Remove the following a SMPS REP 4 17 2 Unplug all connectors from the PBA remove three screws then remove the PBA Replacement 1 Reinstall the components in the reverse order w...

Page 75: ...Sensor PBA Removal 1 Remove the following a SMPS REP 4 17 2 Remove two screws unplug one connector from the Joint PBA then remove the Sensor PBA Replacement 1 Reinstall the components in the reverse o...

Page 76: ...or Removal 1 Remove the following a Side Covers REP 4 15 2 Remove six screws securing the gear bracket unplug the connector from the motor then remove the gear bracket Replacement 1 Reinstall the comp...

Page 77: ...screws from the HVPS PBA 3 Unplug four connectors from the HVPS PBA then remove the PBA Note When you reassemble the HVPS PBA make sure that the high voltage electrodes contacts springs and pins are...

Page 78: ...ntil components cool before you begin work Removal 1 Remove the following a Side Covers REP 4 15 2 Remove the exit guide as shown 3 Remove the screw at the left side of the frame and unlatch the wire...

Page 79: ...6 Unlatch the right end then push the right end slightly inward A flat blade screwdriver may be needed to release the pin on the right end 7 Release the left end then remove the fuser Replacement 1 R...

Page 80: ...12 98 4 30 REP 4 25 Pressure Roller Removal 1 Remove the following a Side Covers REP 4 15 b Fuser REP 4 24 2 Remove the roller Replacement 1 Reinstall the components in the reverse order www printcop...

Page 81: ...rame Removal 1 Remove the following a Side Covers REP 4 15 b HVPS PBA REP 4 23 2 Remove ten screws 3 Unlatch the front end then lift the upper frame up Replacement 1 Reinstall the components in the re...

Page 82: ...overs REP 4 15 d Gear Bracket REP 4 22 e HVPS PBA REP 4 23 f Upper Frame REP 4 26 2 Remove clip in front of roller shaft on the left side 3 Remove one screw then rotate the pickup bushing at the left...

Page 83: ...t forward and to the left to view a pin at the right end Remove the pin passing through the shaft then pull the roller shaft to the right and lift it up Replacement 1 Reinstall the components in the r...

Page 84: ...components cool before you begin work Removal 1 Remove the following a Fuser Assembly REP 4 24 2 Remove two screws from the fuser assembly CAUTION Be careful not to bend the IPR Ground Plate 3 Unsnap...

Page 85: ...eat Roller 5 To remove the gear from the lamp the metal terminal on the lamp must be positioned so that it can be extracted from the center hole and slot on the gear NOTE Insure that the IPR Ground Pl...

Page 86: ...ove the following a Fuser Assembly REP 4 24 2 Remove two screws from the fuser assembly CAUTION Be careful not to bend the IPR Ground Plate 3 Remove the heat roller 4 Remove two screws then remove the...

Page 87: ...Centre 385 5 Unlatch the fuser cover then take it out 6 Remove one screw securing the thermistor then remove the thermistor Replacement 1 Reinstall the components in the reverse order www printcopy in...

Page 88: ...8 REP 4 30 Exit Lower Unit Removal 1 Remove the following a Fuser Assembly REP 4 24 2 Remove one screw then remove the exit lower assembly Replacement 1 Reinstall the components in the reverse order w...

Page 89: ...e the following a Side Covers REP 4 15 b LIU PBA REP 4 18 2 Unplug the speaker connector from the Main PBA Remove two screws from the speaker bracket then remove the speaker Replacement 1 Reinstall th...

Page 90: ...ng a Side Covers REP 4 15 b SMPS Engine PBA REP 4 17 c Main PBA REP 4 19 2 Remove two screws securing the solenoid unplug one connector from the Joint PBA then remove the solenoid Replacement 1 Reinst...

Page 91: ...ollowing a Side Covers REP 4 15 b SMPS Engine PBA REP 4 17 c Main PBA REP 4 19 2 Remove two screws securing the fan unplug one connector from the Joint PBA then remove the fan Replacement 1 Reinstall...

Page 92: ...A REP 4 21 2 To remove the paper empty assembly Remove two screws unplug one connector from the Joint PBA then remove the frame unit Then unlatch the paper empty assembly and take it out 3 To remove t...

Page 93: ...ne PBA REP 4 17 b LIU PBA REP 4 18 c Main PBA REP 4 19 d Sensor PBA REP 4 21 2 Remove two screws unplug one connector from the Joint PBA then remove the frame unit 3 Unlatch the paper separator then t...

Page 94: ...Spring Holder Separate Unit Removal 1 Remove the following a Pickup Roller REP 4 27 2 Release the springs at both sides of the unit then remove the Knock Up Unit 3 Remove the Knock Up Spring 4 Remove...

Page 95: ...6 Knock Up Unit Spring Holder Separate Unit 12 98 4 45 WorkCentre 385 5 Remove the Separate Unit Replacement 1 Reinstall the components in the reverse order www printcopy info w w w p r i n t c o p y...

Page 96: ...4 46 REP 4 37 Paper Separate Units Left Right Removal 1 Remove the following a Knock Up Unit REP 4 36 2 Unlatch the separate units then take them out Replacement 1 Reinstall the components in the rev...

Page 97: ...re 385 REP 4 38 Gear Feed Removal 1 Remove the following a Gear Bracket REP 4 22 2 Remove two screws then remove the Gear Feed Replacement 1 Reinstall the components in the reverse order www printcopy...

Page 98: ...a LSU REP 4 14 b Main PBA REP 4 19 c Joint PBA REP 4 20 d EMI IPR Shield PL 3 1 2 Remove one screw 3 Unlatch the three metal tabs on the rear side of the PTL Unit then take it out Replacement 1 Reins...

Page 99: ...emove the following a SMPS Engine Controller PBA REP 4 17 b HVPS PBA REP 4 23 2 Unplug the connector from the Joint PBA 3 Remove one screw then remove the Fuser Deve Replacement 1 Reinstall the compon...

Page 100: ...WorkCentre 385 12 98 4 50 www printcopy info w w w p r i n t c o p y i n f o...

Page 101: ...t section Parts Lists PL Each item number in the part numbers listing corresponds to an item number in the illustration All the parts in a given subsystem of the machine will be located in the same il...

Page 102: ...L 1 1 Main Assembly 12 98 5 2 PL 1 1 Main Assembly 14 14 13 1 4 2 3 38 5 6 7 8 34 35 36 33 37 32 31 30 29 28 26 27 24 25 23 22 21 20 19 18 15 16 17 14 13 12 10 11 9 www printcopy info w w w p r i n t...

Page 103: ...r TX A 21 PMO Top Cover 22 050K45870 Printer Exit Tray 23 PMO Stacker Flip 24 PMO Stacker RX B 25 PMO Stacker RX A 26 054K18920 MEA Unit Duct Assy 27 160K64040 PBA LIU USA 160K64850 PBA LIU German Ita...

Page 104: ...WorkCentre 385 PL 2 1 OPE Unit Assembly 12 98 5 4 PL 2 1 OPE Unit Assembly 2 1 3 4 5 6 7 8 B A 14 13 12 11 10 24 23 B C 9 15 16 B 17 18 19 20 21 22 www printcopy info w w w p r i n t c o p y i n f o...

Page 105: ...Display LCD 6 160K64030 PBA OPE 7 CBF Harness LCD 8 PCB Main OPE 9 101K41230 ELA Hou Scan Upper 10 PMO Lever Sensor 11 ICT Pinch Shaft 12 PMO Support ADF 13 ICT Spring Coil 14 PMO Pinch Roller 15 NPR...

Page 106: ...Lower Assembly 1 2 3 4 5 66 65 64 63 6 7 9 10 8 11 13 14 15 16 17 18 60 59 19 B 20 21 22 23 24 25 26 27 28 29 24 30 31 32 33 35 34 36 37 40 40 39 38 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57...

Page 107: ...Assy 220V 126K13090 ELA Hou Fuser Assy 110V 29 032K03170 ELA Hou Exit Assy 30 809E24890 Spring Stopper L 31 120E19130 PMO Actuator_Exit 32 RMO Rubber Support 33 130E09090 Sensor PBA 34 101E19690 PMO C...

Page 108: ...WorkCentre 385 PL 4 1 Fuser Assembly 12 98 5 8 PL 4 1 Fuser Assembly 3 2 1 4 5 6 7 8 9 11 10 12 13 14 B 18 15 16 B 17 19 21 22 23 24 20 25 B 26 27 www printcopy info w w w p r i n t c o p y i n f o...

Page 109: ...w 12 CBF Harness 3P 2 Wire 13 Bearing H R R 14 Gear Fuser 15 NEX Roller Heat 16 Bearing H R L 17 122E02480 Lamp Halogen 220V 400W 122E02490 Lamp Halogen 110V 400W 18 130E09100 Thermistor NTC 2 11 Kohm...

Page 110: ...embly 12 98 5 10 PL 5 1 Front Assembly 1 2 3 6 5 4 A C 12 13 11 7 8 10 9 E 14 15 16 18 17 36 C 20 21 19 B 35 34 32 31 37 38 33 22 30 29 28 27 23 24 E 25 26 39 40 41 42 43 44 13 D F www printcopy info...

Page 111: ...PMO Bushing TX B4 19 IPR Brkt Motor 20 127K30780 Motor Step 75 Deg 24V 21 Gear Pinion 22 022K67990 MEA ETC ADF Roller 23 PMO Gear ADF 24 MEC Drive Roller 6000 25 PMO Gear Drive B4 26 022E23880 MEC Ro...

Page 112: ...17E13660 1 1 120E19120 3 1 120E19130 3 1 121E15480 3 1 122E02480 4 1 122E02490 4 1 126K12890 3 1 126K12970 3 1 126K13090 3 1 127E12600 3 1 127K30150 1 1 Part Number PL 127K30780 5 1 130E09090 3 1 130E...

Page 113: ...mended Maintenance 6 6 System Setup 6 10 Setting the Date and Time 6 13 Setting the System ID 6 13 Memory Clear 6 14 Memory Clear in User Mode 6 14 Memory Clear in Tech Mode 6 14 System Data Set up 6...

Page 114: ...appear to have overheated or are otherwise damaged should be replaced with parts which meet the original specifications Always determine the cause of damage or overheating and correct any potential h...

Page 115: ...ce the assembly on a conductive surface such as aluminum or copper foil or conductive foam to prevent electrostatic charge buildup in the vicinity of the assembly 3 Do not use Freon propelled chemical...

Page 116: ...m2 20 Pages 75 g m2 30 Pages One touch dial 20 locations LCD 16 characters x 2 lines Quality Conditions Paper Normal Paper 75g m2 Environment Temperature 20 25 C Humidity 40 60 Fusing System Trouble...

Page 117: ...50 60Hz 3Hz AC 220V 240V 15 50 60Hz 3Hz Power Consumption Max 450Wpeak Avg 150Wh Power Saving Consumption Avg 25Wh Sleeping Mode Certification Compliance FCC UL CSA Acoustic Noise Standby Less than 3...

Page 118: ...aintenance The cycle period outlined below is a general guideline for maintenance The example list is for an average usage of 50 transmitted and received documents per day Environmental conditions and...

Page 119: ...o set make a new shading reference value The reference value is preset at factory However when the CIS or the main board is replaced with new one the reference value must be set again Load the white l...

Page 120: ...t mode will display and check the current ROM level in your machine DRAM TEST This test checks the DRAM memory status and shows if it is functioning properly Pattern Test 1 Pattern Test 2 Pattern 1 Th...

Page 121: ...on Field data described in hexadecimal code Sending Receiving Name of signal Facsimile Control Field FIF data described in ASCII code AUG 20 1998 06 35 PROTOCOL DUMP LIST S R FCF FIF DATA ASCII 610058...

Page 122: ...s 1 Press Menu in tech mode 2 Press System setup on the one touch keypad and press Enter The first setup menu RINGER VOLUME appears in the display 3 Press Up or Down repeatedly to choose the desired s...

Page 123: ...on on the control panel Home Resolution STANDARD use with most docu ments FINE use for documents with fine detail such as small print SUPER FINE use for documents that have extremely fine detail Home...

Page 124: ...supply The print quality may be reduced 1 ON 2 OFF Last Fax Data Reprint If the toner is low or empty the received fax page may be too light to read the message If you lost the fax message because of...

Page 125: ...one touch keypad The display asks you to enter the telephone number If there is a number previously registered the number appears 2 Enter the telephone number up to 20 digits which your machine is co...

Page 126: ...ence 2 Press Menu and Memory Clear on the one touch keypad The LCD displays the type of memory you can choose 3 Scroll to the options by pressing Up or Down until you find the one you want to clear Wh...

Page 127: ...ettings in User mode and the machine is asking if you want to change one of the options listed here Paper Size Select the paper size you will use for the recording paper Press 1 for letter LTR 2 for A...

Page 128: ...w centimeters on the second page If the fax machine cannot reduce the data to fit into one page with the feature enabled the data is divided and printed in actual size on two or more sheets if needed...

Page 129: ...ly suspend or change Distinctive Ring Pattern Detection at any time Before using the Distinctive Ring Pattern Detection option Distinctive Ring service must be installed on your telephone line by the...

Page 130: ...PC printing is completed Press 2 to select 30 minutes The machine turns off automatically 30 minutes after PC Printing is completed Reprint Your machine stores the last 10 pages of received fax data a...

Page 131: ...the user mode press Stop The LCD displays USER MODE SYSTEM DATA Press Enter to set the system data available in the user mode 4 The LCD displays the options you can choose In tech mode the LCD display...

Page 132: ...set to 4800 or 2400 the Rx speed can be any V 27ter speed Error Rate 5 10 If the error rate exceeds the chosen rate fall back occurs which will lower the baud rate automatically down to as low as 240...

Page 133: ...ollowing PAPER JAM COMM ERROR LINE ERROR In service mode the display shows all error messages available in user mode plus additional error messages available only in Service Mode Error messages shown...

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Page 135: ...7 41 LIU PBA 7 42 Modem Line Interface 7 42 Ring Signal Detector 7 42 Dialer 7 42 Line Current Detector 7 43 Serial Interface 7 43 Major Functions Of Parts 7 43 SMPS Switching Mode Power Supply 7 44...

Page 136: ...PER UNIT MAIN PBA HOST PC OPE CN3 CN2 CN3 MOTOR CN4 CN5 CN1 CN2 SCAN PBA CN6 CIS CN6 CN1 CN3 CN2 CN5 CN4 CN1 CN6 CN5 CN4 CN3 CN2 LIU PBA LINE BUZZER CN2 CN4 CN3 HVPS PBA CN1 LASER UNIT LSU COVER OPEN...

Page 137: ...NAL PHONE HANDSET 8 BIT ADC SCAN CNTR I P I O PORT DMA ARM7T 33 GEU P1284 ITU I O I F CACHE 6K DMAC P C UART 2 MEMORY I F CENTRONICS CABLE LCD DOC PC SENSOR OPE PBA MICOM LCD Drive SCAN PBA CIS TX MOT...

Page 138: ...s the image via the electrophotography process The Charge Roller OPC Drum Developer Roller Supply Roller and Toner constitute the Laser Printer Cartridge LSU Laser Scanner Unit Under control of the En...

Page 139: ...t the Laser Diode remains off and the OPC Drum is not exposed Portions of the OPC Drum exposed charged to approximately 50V by the laser beam while unexposed portions charge to 800V The image formed b...

Page 140: ...of Teflon coating is to prevent the melted toner from staying on the roller The lower Roller is the Pressure Roller and is made of silicon resin Its surface is also Teflon coated The thermistor senses...

Page 141: ...IT FOR EACH KEY SIGNAL XDACK XDREQ SDIPCS RD WR D0 D15 A0 A5 LIU_TXD LIU_RXD OPE_TXD OPE_RXD CBSY EBSY EXITP EMSG PRINT CCLK EVIDEO READY PSYNRQ HSYNC CMSG ENGINE PBA SCAN IMAGE PROCESSOR MFP CONTROLL...

Page 142: ...used to read and write data when each CHIP SELECT is connected with RD and WR pin of RAM ROM MODEM and the outside devices and becomes active WR is strobe signal used only write signal for SCAM image...

Page 143: ...ows KS32C6100 has two UART channels The baud rate is 9600bps FIG 7 2 UART BLOCK DIAGRAM FIG 7 3 UART DATA FORMAT 0 1 0 1 CPU BUS LCONO SPCONO SSRO BRDRO Baud Gen 8x Tx Rx Control IRQ control UartIRQ I...

Page 144: ...nel 1 is assigned to external channel the data is sent from memory to memory or from external device to memory Following timing shows that when DMA REQUEST XDREQ is generated DMA ACKNOWLEDGE XDACK is...

Page 145: ...ads or output data in rising edge Parallel Port Interface KS32C6100 has parallel port interface enabling parallel interface with PC This part connected with the computer through the centronics connect...

Page 146: ...he data register 2 Program reads the status register to check that the printer is not BUSY 3 If not BUSY then Write to the Control Register to assert the STROBE line 4 Write to the Control register to...

Page 147: ...3 Peripheral acknowledges host by setting BUSY high 4 Host sets nSTROBE high This is the edge that should be used to clock the data into the Peripheral 5 Peripheral sets BUSY low to indicate that it i...

Page 148: ...e by setting BUSY high 4 Peripheral asserts nACK low to indicate valid data 5 Host acknowledges by setting nAUTOFD high 6 Peripheral sets nACK high This is the edge that should be used to clock the da...

Page 149: ...r Register RBR Receive Buffer Register are used for message communication The TBR and RBR contain the 8 bit command to be transmitted to the printer engine through the CnEMSG pin and the 8 bit engine...

Page 150: ...ine Message transfers from Engine to KS32C6100 COMCLK CnPMSG CnPBSY CMOD 0 TX BIT 0 BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 7 BIT 6 SET TX BIT TO TRANSMIT DATA AUTO CLEAR COMCLK CnEMSG CnEBSY CMOD 1 RX BIT...

Page 151: ...I O RESET OUTPUT GPI04 EXTACK1 SDACK O L SDIP DMA ACKNOWLEDGE SIGNAL OUTPUT GPI05 EXTACK2 RTC_CE O L RTC 4513 CHIP SELECT OUTPUT GPI06 EXTIREQ0 NC GPI07 EXTIREQ1 MIRQ I L MODEM INTERRUPT REQUEST INPU...

Page 152: ...put from watch dog timer nRESET 195 I Not reset nRESET is the global reset input for the KS32C6100 To reset system nRESET must be held to Low level for at least 65 machine cycles nBK0HW 198 I Bank 0 d...

Page 153: ...nRCS1 to bank 1 and so on nSCS 28 O Not RSAM chip select Selection to access external SRAM bank nECS 3 0 29 32 O Not external chip select Four I O banks are provided for mem ory mapped external I O op...

Page 154: ...16 118 121 O Not column address strobes for DRAM The four nCAS outputs indicate the byte selections whenever a DRAM bank is accessed nDOE 115 O Not output enable for DRAM Whenever a DRAM access occurs...

Page 155: ...erial I O TXD is the SIO s output for transmitting serial data nSELECTIN 11 I Not select information This input signal is used by parallel port interface to request on line status information nSTROBE...

Page 156: ...2C6100 and an external host peripheral COMCLK 158 O Command clock COMCLK is used to synchronize command data that the KS32C6100 sends to the printer engine as well as the status messages that the KS32...

Page 157: ...ms the KS32C6100 that the LBP engine is ready to receive the nCPUPSYNC signal When the printer engine receives the nCPUPRINT command from the KS32C6100 it enables nENGPRQ within a preset time inter va...

Page 158: ...n I O ports can be mapped to a specific signal name to external interrupts for example The port assignments that follow are used as one example of such an I O port map GPIO 15 TIMEOUT0 192 O Timer 0 o...

Page 159: ...nsfer on GDMA1 is completed GPIO 4 ExtDACK1 179 O DMA acknowledge for external DMA1 request The active out put signal is generated whenever a DMA transfer on GDMA0 is completed GPIO 3 ExtDACK0 178 O D...

Page 160: ...r U1 after initializing flash memory In primary reset flash memory is read mode enabling to fetch program code in secondary reset MFP controller KS32C6100 is waked up and external peripheral is initia...

Page 161: ...ler After that reset signal inputs into MFP controller KS32C6100 and MFP controller wakes up Reset signal to MFP controller U16 inputs into internal circuit after 65MCLK by internal filter Reset is co...

Page 162: ...ash memory and DRAM are selected by chip select RCSO 1 FMEM_CS RASO 1 SCS CASO 3 lines and data is accessed by the units position of the word Modem TX RX Related Circuits MODEM These circuits control...

Page 163: ...CIRCUIT In receive mode analog signals from the LIU PBA are amplified and transferred to RXIN 45 through the smoothing filter FIG 7 10 TX AND RX PART MODEM KS16117 TXOUT RXIN FAX Receive FAX Transmit...

Page 164: ...the D0 D7 data bus is controlled by the READ 2 and WRITE R W signals When not being written into or read from D0 D7 assume the high impedance state CS 54 I Chip select The modem is selected and decode...

Page 165: ...a is output to the DTE via the RXDO pin in both serial and parallel data modes PDME bit set or reset When receiving data the modem outputs a data bit on the falling edge of DCLK The center of RXDO bit...

Page 166: ...pins Further the circuit board traces connecting the crystal and capacitors to XTALI and XTALO should be as short as possible The use of circuit board bias should be avoided in the crystal oscillator...

Page 167: ...ms containing eye pattern display data for the oscilloscope X and Y axis The data words are 9 bits long with the sigh bit shifted out first and the bits clocked by the ris ing edge of SEPCLK SEPCLKX 8...

Page 168: ...AFE s transmitter Normally connected to RCVI Externally connected to SWGAINI pin TXATT 3 1 BYPASS 38 39 40 36 I I Auxiliary Signals Analog Transmit Attenuation The host can cause the modem to attenuat...

Page 169: ...s the transmitter side of AFE Receiver Amplifier Input This internally tied to pin17 which is Analog Ground Externally connected to SWGAINI pin Negative Reference Voltage AOUT 49 O Externally connecte...

Page 170: ...ge processor performs shading correction of image signal gamma correction and logic FIG 7 11 SCAN_IP BLOCK DIAGRAM SCAN_IP Image Processor Data Memory Host Controller Scanner Controller A D Converter...

Page 171: ...13 I Reserved GOP 0 26 O Reserved GOP 1 31 O RX_CTL Connected remote path Connected modem RX path GOP 2 40 O SOUND_CTL Connected modem TX path to speaker path Connected modem RX path to speaker path G...

Page 172: ...4 38 GPIO 5 39 GPIO 6 44 GPIO 7 45 GPIO 8 49 GPIO 9 50 GPIO 10 85 GPIO 11 86 GPIO 12 93 GPIO 13 95 GPIO 14 114 GPIO 15 115 Table 4 I O Port of Scan IP Signal PIN No Type Circuit Name Description H L...

Page 173: ...voltage Vref input of A D converter ADCIN 96 Analog signal input of CIS VREFADC 102 Bottom standard voltage Vref input of A D converter TX_A1 105 Scan motor driver control signal TMIA0 output TX_B1 1...

Page 174: ...f LED_GND1 2 3 CIS_CLK CIS_SH CIS driver power supply is 12V LED driver power supply is 5V Especially LED_GND1 2 3 are enable to control voltage from U18 using Q1 in CLED signal As CIS input signal mi...

Page 175: ...E s sensing is also transmitted to the main through UART line and then the main drives necessary operation OPE PBA consists of U1 MICOM Z8601 LCD key matrix LED indicators SCAN position sensor and the...

Page 176: ...put terminal and U3 39 LS terminal Ring Signal Detector U3 28 MO terminals are ring signal output terminals Q4 and Q5 put out ring signals and drive Piezzo It has only the functions related to ring de...

Page 177: ...signal or dialing information from MFP controller of the main PBA U15 Insulation Between primary and secondary circuit part 3 U6 PC817 Photo coupler It enables UART U3 29 TxD of U3 STI9510 to deliver...

Page 178: ...leakage inductance The power secondary winding pin 11 12 is rectified and filtered by D252 C251 L251 and C255 C259 to create the 5V output voltage The bias winding pin 4 5 is rectified and filtered by...

Page 179: ...s out the serial data to from the NVRAM Motor Driving 24V The Motor Driver SLA7029M U207 is used to drive the Main Stepping Motor An SLA7029M U207 receives Motor Drive Enable and two phase signals fro...

Page 180: ...ng It is placed in the exit of Printer and senses the paper exit LSU Control LSU is composed of a polygon mirror motor and a laser gun part The polygon mirror motor starts rotation by PMOTOR signal an...

Page 181: ...y cycle when it goes to High positive part outputs 0V and negative part only output 1000V When some duty cycle is applied to the PWM input of H V circuit THV terminal outputs positive voltage Main and...

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Page 183: ...dress should be visible Secure the sheet with tape Apply the correct postage and mail or return as appropriate Name and Mailing Address Date Job Title or Employee Number Publication Number Date Title...

Page 184: ...PLACE REQUIRED POSTAGE HERE XEROX CORPORATION Attn Manager Customer and Service Documentation 300 Main Street Suite 20A East Rochester New York 14445 FOLD FOLD Before taping please be sure that all in...

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