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Lexmark OptraImage 443, Service Manual

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Lexmark OptraImage 443 Service Manual Download Page 18

Lexmark Internal Use Only

1-14

2. CCD signal processing circuit

The video noise suppression circuit is to eliminate the reset noise and low frequency noise of CCD and
then PGA performs video gain control.  The “level shift” circuit is used to bias the PGA output to
satisfy the reference bottom requirement of the A/D converter. The “DC-OFFSET Adjust” circuit is used
to adjust the bias level of video signal.

* PGA: Programmable gain amplifier

CCD

MUX

Video Noise

Suppression

Circuit

R

G

B

DC Offset

Adjust Circuit

Level

Shift

A/D

Converter

PGA*

Summary of Contents for OptraImage 443

Page 1: ...OptraImage 443 Service Manual Doc No 253 0017 01 Rev 1 01 Lexmark International Inc...

Page 2: ...nection 2 5 2 4 2 1 SCSI Cable Connection 2 5 2 5 SCSI ID SETTING 2 7 2 6 SCSI TERMINATOR 2 8 3 3 3 3 PROBLEM SOLVING PROBLEM SOLVING PROBLEM SOLVING PROBLEM SOLVING 3 1 3 1 DIAGNOSTICS 3 1 3 1 1 Diag...

Page 3: ...ver Removal Mounting 4 13 4 4 5 ADF Optical Chassis Removal 4 14 4 4 6 ADF Unit Removal 4 15 4 4 7 ADF Inverter Removal 4 16 4 4 8 ADF Lamp Removal 4 17 4 4 9 Upper Housing Removal 4 18 4 4 10 Flatbed...

Page 4: ......

Page 5: ...manual thoroughly to obtain comprehensive knowledge about the OptraImage 443 before serving the unit 1 1 1 1 1 1 1 1 General notes for servicing General notes for servicing General notes for servicing...

Page 6: ...ed The operating steps follow the same procedure as that of a regular copier or fax machine A Digital Copier and a Full function Fax Machine A Digital Copier and a Full function Fax Machine A Digital...

Page 7: ...or ADF Max A4 Letter for Flatbed Display 16 character x 2 LCD Image Types 42 bit color internal 14 bit gray internal 1 bit Line art Dither Error Diffusion 1 bit CMYK in Dither or Error Diffusion PC In...

Page 8: ...scans 2 Power on Time 8 0 hours day 20 days month 3 Environment 20 30 C 40 70 RH Relative Humidity MTBF 5 000 hours MSBF 50 000 pages Scanner Life 5 years or 600 000 scans excluding the pad replacemen...

Page 9: ...Outer View Figure 1 1 OptraImage 443 Outer View Figure 1 1 OptraImage 443 Outer View Figure 1 1 OptraImage 443 Outer View Figure 1 1 OptraImage 443 Outer View Document cover LCD display Control Panel...

Page 10: ...guration The equipment consists of the following components Document Cover and Paper Tray Upper Cover ADF Unit Lower Unit Main Control PCBA Output Paper Tray Document Cover ADF Paper Feed Tray Upper H...

Page 11: ...Document Cover ADF Paper Feed Tray ADF Module ADF Cover Upper Housing Unit Output Paper Tray Panel PCBA Panel Cover Main Control PCBA Optical Chassis Flatbed Motor Unit Bottom Housing Optical Chassis...

Page 12: ...ing Configuration Wiring Configuration Wiring Configuration Figure 1 2 Wiring Configuration Figure 1 2 Wiring Configuration Figure 1 2 Wiring Configuration Figure 1 2 Wiring Configuration Control Pane...

Page 13: ...2 Mechanical Section Operation Mechanical Section Operation Mechanical Section Operation Mechanical Section Operation 1 6 2 1 1 6 2 1 1 6 2 1 1 6 2 1 Scanning module drive Scanning module drive Scanni...

Page 14: ...C52 for panel control two ASIC for flatbed and ADF image processing and each have external 32MB SRDRAM for data processing two A D converter for processing flatbed and ADF CCD signals input two sets o...

Page 15: ...iagram Figure 1 4 System Block Diagram Video Circuit Main board Control section SCSI controller To host Optical unit Lamp unit Inverter Flatbed motor Power supply LED display Sensor input ADF section...

Page 16: ...is used to generate correct signals to the CCD so that the CCD may generate the correct image data Pin Assignment for Flatbed Video Circuit J5 Pin No Name Function 1 A G Analog Ground 2 VOR CCD red Ch...

Page 17: ...eset Gate 8 Clamp CCD Clamp Signal 9 GND 5V GND 10 PH2 CCD Clock Phase 11 PH1 CCD Clock Phase 12 H24G 24V Ground 13 A G Analog Ground 14 24Va Analog 24Va Power Supply Pin Assignment for ADF Video Circ...

Page 18: ...hen PGA performs video gain control The level shift circuit is used to bias the PGA output to satisfy the reference bottom requirement of the A D converter The DC OFFSET Adjust circuit is used to adju...

Page 19: ...hoto sensor The photo transistor transmission to the photo sensor receiver circuit is shown below Figure 1 5 Home position sensor Figure 1 5 Home position sensor Figure 1 5 Home position sensor Figure...

Page 20: ......

Page 21: ...ore unpacking and installation Do not install in a place where vibration may occur Keep the scanner out of direct sunlight Do not install near a heat source Do not place the scanner around materials w...

Page 22: ...Lexmark Internal Use Only 2 2 Figure 2 1 Scanner Packaging Figure 2 1 Scanner Packaging Figure 2 1 Scanner Packaging Figure 2 1 Scanner Packaging...

Page 23: ...t the scanning unit during transportation Please unlock the scanner first before using it 1 Place the scanner on its side as shown in Figure 2 2 2 Locate the lock switch near the control panel Move th...

Page 24: ...2 4 1 2 4 1 Power Cable Connection Power Cable Connection Power Cable Connection Power Cable Connection 1 Remove the power cable from the PVC bag 2 Turn the power switch to the off position 0 depress...

Page 25: ...ion Configuration I The number of devices attached to the SCSI bus including the host PC is three The Configuration I The number of devices attached to the SCSI bus including the host PC is three The...

Page 26: ...ready another device linked to the host via SCSI cable remove the terminator from that device If the terminator can not be removed it is recommended that the connection of Configuration I be used 2 Se...

Page 27: ...arious status indicating the different ID numbers The 4th dip switch of The 4th dip switch of The 4th dip switch of The 4th dip switch of the SCSI ID selector of the scanning unit is not in use the SC...

Page 28: ...rminator Terminator ON OFF Status Terminator ON OFF Status Terminator ON OFF Status Terminator ON OFF Status Terminator ON Terminator ON Terminator ON Terminator ON Terminator Off Terminator Off Termi...

Page 29: ...e source of the problem quickly Use these diagnostics first If the diagnostics do not locate the source of the problem refer to Section 3 2 Troubleshooting Troubleshooting Troubleshooting Troubleshoot...

Page 30: ...3 1 Flowchart 3 1 Flowchart 3 1 Flowchart 3 1 3 1 1 2 3 1 1 2 3 1 1 2 3 1 1 2 Group 2 Error Flowchart Flatbed Group 2 Error Flowchart Flatbed Group 2 Error Flowchart Flatbed Group 2 Error Flowchart F...

Page 31: ...scanner ready Troubleshooting flowchart power on to scanner ready Troubleshooting From Power on Power LED on No Yes See Table 3 3 Scan module moves to shipping retainer position No Yes Scan module mo...

Page 32: ...ration Troubleshooting flowchart online flatbed operation Flatbed Operation Online Troubleshooting Yes No Yes No No See Table 3 7 See Table 3 9 See Table 3 14 Scan module moves to flatbed scan positio...

Page 33: ...n Troubleshooting flowchart online ADF operation ADF mode No No Yes No Yes No Yes Yes Yes Frequent Paper Jam Frequent double feed Large skew volume Large jitter Reading position deviation Online Troub...

Page 34: ...tion Troubleshooting flowchart Offline flatbed operation Flatbed operation Offline Troubleshooting Power LED on No Yes See Table 3 3 Scan module moves to shipping retainer No Yes See Table 3 4 Scan mo...

Page 35: ...wer switch on None Power unit AC input connector disconnected None Visual check Connect the connector None Power switch connector disconnected None Visual check Connect the connector None Power unit m...

Page 36: ...ark Remark Flatbed CCD board main control PCBA cable failure Sensor board main control PCBA cable Tester or visual check Replace the home position cable Home position sensor board failure CCD board Te...

Page 37: ...sor board main control PCBA cable failure Sensor board main control PCBA cable Tester or visual check Replace the home position sensor cable Home position sensor board failure Sensor board Tester chec...

Page 38: ...control board main control PCBA connection failure None Visual check Check connector and the cable between the ADF control board and main PCBA board None ADF control board main control PCBA cable fai...

Page 39: ...the SCSI ID to the correct one SCSI ID should be within the range of 1 7 Each device attached to the SCSI bus must have a different SCSI ID SCSI cable connection failure None Visual check Connect the...

Page 40: ...ause Cause Cause Cause Relevant Unit Relevant Unit Relevant Unit Relevant Unit Check Method Check Method Check Method Check Method Maintenance Method Maintenance Method Maintenance Method Maintenance...

Page 41: ...e Method Maintenance Method Remark Remark Remark Remark Power supply main control board connection failure None Visual check Connect the connector None Power supply fails Power supply Tester check 5V...

Page 42: ...d main control PCBA cable Tester or visual check Replace the home position sensor cable None Home position sensor board failure Sensor board Tester check Replace the PCBA None Table 3 12 Table 3 12 Ta...

Page 43: ...th isopropyl alcohol None Table 3 14 Table 3 14 Table 3 14 Table 3 14 3 1 1 18 3 1 1 18 3 1 1 18 3 1 1 18 Frequent paper jam Frequent paper jam Frequent paper jam Frequent paper jam Cause Cause Cause...

Page 44: ...r wear and tear Replace the pad assembly touch spring unit None ADF unit failure ADF unit Replace the ADF unit Replace the ADF unit None Table 3 16 Table 3 16 Table 3 16 Table 3 16 3 1 1 20 3 1 1 20 3...

Page 45: ...Parts Replacement Spare Parts Replacement Spare Parts Replacement This chapter describes methods for cleaning and the maintenance parts replacement adjustment and lubrication necessary for normal oper...

Page 46: ...mbly and feed roller Fig 4 1 in the ADF section with a lint free cloth and isopropyl alcohol Clean the pad assembly by wiping it in the direction of the arrow as shown in Fig 4 2 Figure 4 2 Feed Rolle...

Page 47: ...voltmeter With 0 01 V range 9 Oscilloscope 10MHz or more with external sweep 10 Compressed air Can air oil free Table 4 1 Maintenance tools Table 4 1 Maintenance tools Table 4 1 Maintenance tools Tab...

Page 48: ...Figure 4 4 Flatbed Optical Chassis Unit Figure 4 4 Flatbed Optical Chassis Unit Figure 4 4 Flatbed Optical Chassis Unit Figure 4 4 Flatbed Optical Chassis Unit Figure 4 5 ADF Optical Chassis Unit Figu...

Page 49: ...3 3 Lamp Inverter circuit Lamp Inverter circuit Lamp Inverter circuit Lamp Inverter circuit Figure 4 6 Lamp inverter circuit Figure 4 6 Lamp inverter circuit Figure 4 6 Lamp inverter circuit Figure 4...

Page 50: ...Lamp Flatbed Lamp Flatbed Name Name Name Name Specification Specification Specification Specification Lamp Cold cathode fluorescent lamp Table 4 2 Table 4 2 Table 4 2 Table 4 2 Figure 4 7 Lamp Flatbe...

Page 51: ...3 5 4 3 5 4 3 5 Motor unit Flatbed Motor unit Flatbed Motor unit Flatbed Motor unit Flatbed Figure 4 8 Motor unit Flatbed Figure 4 8 Motor unit Flatbed Figure 4 8 Motor unit Flatbed Figure 4 8 Motor u...

Page 52: ...Flatbed Belt Flatbed Belt Flatbed Name Specification No of Teeth Belt Width Carrier Bell UNITTA B 453 MXL 322J 426T 6 Motor Bell 112T 6 Table 4 3 Table 4 3 Table 4 3 Table 4 3 Figure 4 9 Belt Flatbed...

Page 53: ...igure 4 10 ADF unit Figure 4 10 ADF unit Figure 4 10 ADF unit 4 3 8 4 3 8 4 3 8 4 3 8 Control Panel PCBA Control Panel PCBA Control Panel PCBA Control Panel PCBA Figure 4 11 Control Panel PCBA Figure...

Page 54: ...ry 4 3 9 1 4 3 9 1 4 3 9 1 4 3 9 1 CCD Board Screws CCD Board Screws CCD Board Screws CCD Board Screws Screws for CCD board in the optical chassis unit are as shown Figure 4 12a Flatbed CCD board scre...

Page 55: ...ssemble in the reverse order of disassembly 4 4 2 4 4 2 4 4 2 4 4 2 ADF Snap in Pad Module Removal and Mounting ADF Snap in Pad Module Removal and Mounting ADF Snap in Pad Module Removal and Mounting...

Page 56: ...shown below lift the document cover to remove the studs from the hinge holes The studs are loosely attached to the hinge holes in the purpose to cover the depth of your original Figure 4 14 Document C...

Page 57: ...e ADF unit backward 2 Take out the ADF cover and align the two clip joints on the ADF unit as shown in Figure 4 15b 3 Fasten the fixing screws see Figure 4 15a Figure 4 15b Check the photo sensor s ar...

Page 58: ...nnect the ADF motor board cable with one hand hold the top and bottom of the CCD board as shown in Figure 4 16b Figure 4 16a Removing the ADF Optical Chassis 1 Figure 4 16a Removing the ADF Optical Ch...

Page 59: ...he ADF optical chassis See subsection 4 4 5 2 Remove the fixing screws located at the four corners of the ADF unit 3 Lift the ADF unit to remove it as shown in Figure 4 17 Figure 4 17 ADF Unit Removal...

Page 60: ...l ADF Inverter Removal ADF Inverter Removal 1 Remove the ADF optical chassis See subsection 4 4 5 2 Disconnect the ADF inverter cable 3 Remove the ADF inverter Figure 4 18 ADF Unit Removal Figure 4 18...

Page 61: ...le the other hand hold the base of the ADF unit Then push forward to separate these two parts 3 Use pincerpliers to remove the screws on the ADF lamp assembly as shown in below 4 Gently remove the lam...

Page 62: ...See subsection 4 4 4 and subsection 4 4 5 3 Remove the rubber pad with a flat screwdriver 4 Remove the fixing screws beneath the rubber pad 5 Loosen the attachment on the side of the document cover t...

Page 63: ...out the flatbed optical chassis Figure 4 21 Flatbed Optical Chassis Removal Figure 4 21 Flatbed Optical Chassis Removal Figure 4 21 Flatbed Optical Chassis Removal Figure 4 21 Flatbed Optical Chassis...

Page 64: ...al Flatbed Lamp Removal 1 Remove the flatbed optical chassis See subsection 4 4 8 2 Remove the ADF unit See subsection 4 4 6 3 Disconnect the lamp cable 4 Figure 4 22 Lamp Removal Figure 4 22 Lamp Rem...

Page 65: ...latbed optical chassis See subsection 4 5 7 2 Disconnect the lamp cable the while cable 3 Disconnect the lamp inverter cable the red cable 4 Pull out the lamp inverter PCBA Figure 4 23 The lamp invert...

Page 66: ...5 2 2 Remove the ADF unit See subsection 4 5 3 and subsection 4 5 4 3 Remove the upper housing See subsection 4 5 6 4 Remove the flatbed optical chassis See subsection 4 5 7 5 Disconnect the motor cab...

Page 67: ...moval The Control Panel PCBA Removal The Control Panel PCBA Removal 1 Place the scanner on its side as shown in Figure 4 25 2 Loosen the control panel from the scanner 3 Disconnect the flat cable 4 Re...

Page 68: ...as shown n Figure 4 26 2 Remove all cables of the PCBA 3 Remove all connectors 4 Remove DB25 connector fixing screws with a nut driver Figure 4 26 Metal Cover Removal Figure 4 26 Metal Cover Removal...

Page 69: ...LED Sensor PCBA Replacement LED Sensor PCBA Replacement 1 Remove the ADF unit see subsection 4 5 5 2 Disconnect all cables Figure 4 28 LED display PCBA replacement Figure 4 28 LED display PCBA replac...

Page 70: ...ain control PCBA The specified voltage level for each pin of J10 is as follows Pin 14 24VDC Pin 13 24VGND Pin 4 5VDC Pin 3 GND 4 5 2 4 5 2 4 5 2 4 5 2 Main control PCBA input power 5V failure check Ma...

Page 71: ...motor Keep holding this sensor A few minutes later the scanner will stop turning the ADF motor and then the Jam LED will be on Remember to keep holding the sensor 3 As described above if the correspo...

Page 72: ...positions to be lubricated Lubrication Lubrication Lubrication Lubrication Position Position Position Position Lubricant Type Lubricant Type Lubricant Type Lubricant Type Lubricant Lubricant Lubrican...

Page 73: ...11 004 0433 0 SP 12G3752 1 0 1 8 L P SENSOR ARM 24mm L 180mm 003 0255 0 12G3752 1 0 1 9 L P SENSOR ARM 17mm L 150mm 003 0256 0 12G3752 1 0 1 10 MICRO SWITCH CABLE 104 0167 0 12G3752 1 0 1 11 MAIN FRAM...

Page 74: ...PTOR IEC 2PIN 24V 2 5A 60W 100 240V 003 0260A 0 12G3762 1 0 1 B AC POWER CORD US 2 PIN 7A 125V 1 8m 104 0080 0 11B6078 1 0 1 C SCSI II CABLE 50P M 50P M P 1 27 L 2m 104 0172 0 12G0017 1 0 1 D NOTICE C...

Page 75: ...5 3...

Page 76: ...Lexmark Internal Use Only 5 4...

Page 77: ...5 5...

Page 78: ......

Page 79: ...ptraImage 443 Label Placement OptraImage 443 Label Placement The illustration on the following page shows the location of the labels containing information that is helpful when there is a specific pro...

Page 80: ...cation Screw names as used in the chapters above are given according to the following rule for example P H M3x8 Spring W Washes type Screw type and length Shape of screw head Shape of screw head P H P...

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