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Diagnostic Aids 3-1

4077-20X, 30X

3.  Diagnostic Aids

Use these diagnostic test procedures to verify a repair. 

Encoder Sensor Test

This test disables the printer motors to allow you to manually move 
the carrier to verify the encoder is working correctly. 

To run the test: 

1. Turn the printer off.

2. Remove the front cover.

3. Disconnect the transport motor connector J-6 at the system 

board.

4. Turn the printer on.

5. After a few seconds, the power light blinks 1 time. The power 

light blinks as the carrier moves.

If the test fails, power off the printer and remove the carrier assembly 
without unplugging the printhead cable. 

Power on the printer and check for +5 V dc at pins 1, 2 and 3 of the 
encoder card connector.

1.  If voltage is not present, check the printhead cable for opens to 

the encoder card. If the printhead cable is good, replace the 
system board. 

2.  If voltage is present, check the sensor on the encoder card by 

monitoring pin 3 of the encoder card connector as you pass a 
piece of paper through the sensor. The voltage should go from 
+5 V dc to 0 V dc. Turn the power off and back on to make this 
check again. If the voltage at pin 3 does not change, replace the 
encoder card. If the symptom remains, replace the printhead 
cable. 

Содержание 2050 Color Jetprinter

Страница 1: ...ark is a trademark of Lexmark International Inc registered in the United States and or other countries Color Jetprinter is a trademark of Lexmark International Inc Table of Contents Index Safety and Notices Trademarks Start Diagnostics Main Menu ...

Страница 2: ...ked at the address given below requests for publications should be made to your point of purchase Comments may be addressed to Lexmark International Inc Department D22A 035 3 740 New Circle Road Lexington Kentucky 40550 U S A Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you Lexmark is a trademark of Lexmark I...

Страница 3: ...f Test POST Sequence 2 2 POST Symptom Table 2 3 Symptom Tables 2 4 Service Checks 2 6 Envelope Feed Service Check 2 6 First Print Line Service Check 2 6 Maintenance Station Service Check 2 7 Paper Feed Service Check 2 8 Paper Path Service Check 2 11 Parallel Port Service Check 2 12 Power Service Check 2 12 Print Quality Service Check 2 13 Transport Service Check 2 15 Diagnostic Aids 3 1 Encoder Se...

Страница 4: ...arge Outside Gear Removal 4 11 Left Side Frame Assembly Removal 4 12 Maintenance Station Assembly Removal 4 13 Maintenance Wipers and Caps Removal 4 13 Manual Insert Tray Removal 4 13 Mid Frame Assembly Removal 4 13 Paper Feed Motor Removal 4 14 Paper Guide and EOF Flag Assembly Removal 4 14 Paper Load Door Removal 4 16 Pick Roll Hub Shaft and Envelope Bucklers Removal 4 16 Power Supply Removal 4 ...

Страница 5: ...ts Catalog 7 1 How To Use This Parts Catalog 7 1 Assembly 1 Covers 7 2 Assembly 2 Frames 7 4 Assembly 3 Paper Feed 7 6 Assembly 4 Electronics 7 8 Assembly 5 Carrier 7 12 Assembly 6 Carrier Transport 7 14 Assembly 7 Sheet Feeder 7 16 Assembly 8 Maintenance Station 7 18 Index X 1 ...

Страница 6: ... table and service checks used to isolate failing field replaceable units FRUs 3 Diagnostic Aids contains tests and checks used to locate or repeat symptoms of printer problems 4 Repair Information provides instructions for making printer adjustments and removing and installing FRUs 5 Connector Locations uses illustrations to identify the connector locations and test points on the printer 6 Preven...

Страница 7: ...t von anderen benützt werden Zusätzliches Risiko eines elektrischen Schlags und körperlicher Verletzung existiert während des Auseinandernehmens und der Wartung des Geräts Fachpersonal sollte im vollen Verständnis der Lage entsprechende Vorsichtsmaßnahmen ergreifen Ersatzteile müssen gleiche oder gleichwertige Merkmale wie die Originalteile aufweisen da Sicherheitsvorkehrungen nicht immer offensic...

Страница 8: ...y no para cualquier otro usuario Existen mayores riesgos de descargas eléctricas y daños personales durante el desmontaje y la reparación de la máquina El personal cualificado comprende esto y toma las precauciones necesarias Los dispositivos de seguridad de algunas partes quizá no siempre puedan ser reconocidas a simple vista Por lo tanto las partes de reemplazo deben poseer características idént...

Страница 9: ...es eléctricos e ferimentos graves durante a desmontagem e manutenção deste produto Os profissionais destes serviços devem estar avisados deste facto e tomar os cuidados necessários Os dispositivos de segurança de algumas peças poderão não ser sempre suficientemente evidentes Assim as peças sobressalentes devem possuir características idênticas ou equivalentes às peças originais Chinese Safety Info...

Страница 10: ...4077 20X 30X x Korean Safety Information ...

Страница 11: ...power off and power to the printer 7 5 Watts Idle Mode power on not printing 12 Watts Printing average 25 Watts Printing peak Maintenance Approach The diagnostic information in this manual leads you to the correct field replaceable unit FRU or part Use the error indicator charts symptom index service checks and diagnostic aids to determine the symptom and repair the failure Begin with Start on pag...

Страница 12: ...r Setup ESD Electrostatic Discharge FRU Field Replaceable Unit HVPS High Voltage Power Supply LED Light Emitting Diode LVPS Low Voltage Power Supply NVRAM Nonvolatile Random Access Memory OEM Original Equipment Manufacturer POST Power On Self Test V ac Volts alternating current V dc Volts direct current ZIF Zero Insertion Force ...

Страница 13: ...blinks If your printer has an error indication locate the series of blinks in the Error Indicator Table on page 2 2 and take the indicated action Unplug the printer to clear the error indicator If an error indicator appears go to the error indicator table and take the indicated action for that error 1 Run the Print NVRAM Contents on page 3 4 The last error appears at the bottom of the page 2 Run t...

Страница 14: ... no errors go to the Symptom Tables on page 2 4 locate the symptom and take the indicated action If your printer does not complete POST locate the symptom in the following table and take the indicated action Error Code Number of Power Light Flashes Action 64 65 7 Replace the Code Module and or system board 66 78 6 Replace the Code Module and or system board 79 9 Replace the Code Module and or syst...

Страница 15: ...he Power Service Check on page 2 12 Feeds paper Go to the First Print Line Service Check on page 2 6 Paper feed gears do not turn Go to the Paper Feed Service Check on page 2 8 Carrier doesn t move Go to the Transport Service Check on page 2 15 Carrier slams side frame Go to the Transport Service Check on page 2 15 ...

Страница 16: ...ems Symptom Action No carrier movement Slow carrier movement Carrier stops Carrier slams side frame Go to the Transport Service Check on page 2 15 Symptom Action Printer not communicating with host computer Go to the Parallel Port Service Check on page 2 12 Symptom Action Fails to cap the printhead Fails to clean the printhead Go to the Maintenance Station Service Check on page 2 7 ...

Страница 17: ...eck on page 2 8 Envelopes fail to feed Go to the Envelope Feed Service Check on page 2 6 Paper skews Go to the Paper Path Service Check on page 2 11 Symptom Action No power in printer no Power light no motors Go to the Power Service Check on page 2 12 Symptom Action Voids in characters Light print Prints off the page Fuzzy print Carrier moves but does not print Printhead drying prematurely Vertica...

Страница 18: ...the envelope guides are against the envelopes Perform the Paper Feed Service Check on page 2 8 FRU Action 1 End of Forms Flag Check the flag for binds or damage 2 End of Forms Sensor Check the sensor for dirt 3 System Board Perform the Paper Sensor Test on page 3 2 to check the end of forms sensor on the system board 4 Feed Arm Assembly Check all parts of the feed arm assembly for binds wear or da...

Страница 19: ...arrier movement to the left will uncap the printheads The wipers clean the printhead nozzles as the carrier leaves the maintenance station The wipers clean the printheads only when the carrier is moving to the left There should be no wiping action of the printhead nozzles when the carrier is moving to the right After the cleaning operation is complete a tab on the maintenance station engages a tab...

Страница 20: ...tructions Be sure there is not too much paper in the sheet feeder Be sure the correct type of paper is being used Check for static in the paper FRU Action 1 System Board With J12 disconnected and power on check for 24 V dc between J12 3 and ground on the system board If the voltage is not present check for motor pins shorted to the motor housing If you find a shorted pin replace the motor If you s...

Страница 21: ...n only the paper feed motor turns in two directions If the paper feed motor turns in one direction only replace the system board Binds in the paper feed motor or gear train can cause intermittent false paper jam errors Remove the paper feed motor and check the shaft for binds Also check for loose or worn motor gear 3 Gears Check for binds in the gear train and paper feed mechanism by rotating the ...

Страница 22: ...077 20X 30X 5 Sheet Feeder Check the following for wear or damage Pick Rollers Envelope Bucklers All parts inside the left and right edge guides 6 End of Forms Flag Spring Check for binds or damage FRU Action ...

Страница 23: ...uckling the paper Be sure the correct type of paper is being used Be sure the printer is installed on a flat surface FRU Action 1 Large and Small Feed Rollers Check for wear and binds 2 Small Feed Roller Springs Paper Guide Paper Flap Check for damage 3 Star Rollers Exit Drive Belt Check for wear and binds 4 Sheet Feeder Check the following for wear or damage Pick Rollers Envelope Bucklers All par...

Страница 24: ...ble J11 1 to GND 5 V dc J11 3 to GND 24 V dc If you do not have correct voltage replace the power supply Be sure to unplug the printer before you reconnect the power supply to the system board 2 Printhead Cable Parallel Cable Encoder Card Turn off the printer Disconnect one of the printhead cables and turn on the printer Look for a symptom change Check the failing part for shorts and replace as ne...

Страница 25: ...ure If there are even breaks in the diagonal line similar to the pattern shown below replace the system board If there is a single break or random breaks in the diagonal line check the following Check the gold plated contacts on the end of the cable that connect to the carrier for dirt and wear Use only a clean dry cloth to clean the contacts Also check the cable for damage You may need to remove ...

Страница 26: ...ems in the transport area Check the following Transport belt for wear Carrier guide rod for wear or dirt Carrier to carrier frame engagement the carrier guide rod and carrier bearing surfaces should be lubricated with grease P N 1329301 Idler pulley parts for wear damage or looseness Encoder strip for wear or dirt 7 Alignment Uneven vertical lines can be adjusted by performing the bidirectional al...

Страница 27: ...and ground as the printer goes through POST 3 Carrier Guide Rod Clean the carrier rod Lubricate the rod or the carrier rod bearing surface with grease P N 1329301 4 Transport Belt Idler Pulley Parts Carrier Frame Check for worn loose or broken parts Check for obstructions blocking carrier movement Carrier to carrier frame engagement should be lubricated with grease P N 1329301 5 Encoder Strip Chec...

Страница 28: ...test fails power off the printer and remove the carrier assembly without unplugging the printhead cable Power on the printer and check for 5 V dc at pins 1 2 and 3 of the encoder card connector 1 If voltage is not present check the printhead cable for opens to the encoder card If the printhead cable is good replace the system board 2 If voltage is present check the sensor on the encoder card by mo...

Страница 29: ...2 Remove the front cover 3 Disconnect the transport motor connector J 6 at the system board 4 Turn the printer on 5 After a few seconds the power light blinks 1 time After a short pause the power light blinks continually 6 Move the carrier to the left away from the maintenance station 7 Release the carrier and insert paper into the manual feed slot As paper is inserted and removed from the paper s...

Страница 30: ...nplug the machine 2 Attach the wrap plug to the parallel port P N 1319128 3 Position the left edge of the printhead carrier at the center of the third exit roller 4 Turn the printer on The power light stays on if the test runs successfully A failure occurs if the power light does blinks The test continues until power is turned off Irregularity of the blinking of the power light is an indication of...

Страница 31: ...he printer off 2 Position the left edge of the printhead carrier at the center of the second exit roller from the left 3 Turn the printer on The test prints English for easy recognition The following appears on the right side of the printout Device ID The following appears below the printout Code Level Code Level Date Last Error Page Count ...

Страница 32: ...adle and a color print cartridge in the right side To enter the test 1 Turn the printer off 2 Position the left edge of the printhead carrier at the center of the left most exit roller 3 Turn the printer on The test page will contain the following Code level and date Nozzle test pattern for both cartridges Bidirectional alignment pattern Vertical and horizontal test patterns Purge test for both ca...

Страница 33: ...d furniture Put the ESD wrist strap on your wrist Connect the wrist band to the system ground point This discharges any static electricity in your body to the printer Hold the ESD sensitive part by its edge connector shroud cover do not touch its pins If you are removing a pluggable module use the cor rect tool Do not place the ESD sensitive part on the printer cover or on a metal table if you nee...

Страница 34: ... Removal Procedures The following procedures are arranged according to the name of the printer part discussed Unplug the power cord before removing any parts Releasing Plastic Latches Many of the parts are held in place with plastic latches The latches break easily release them carefully To remove such parts press the hook end of the latch away from the part to which it is latched ...

Страница 35: ...ce station assembly Pull up the right side of the mid frame assembly and pull forward and remove the maintenance station assembly 5 Remove the two screws securing the carrier frame to the base cover 6 Slide the printer off the base cover Carrier Belt Removal 1 Remove the front cover 2 Remove the carrier assembly 3 Push the idler pulley to the right to release the tension on the belt and remove the...

Страница 36: ...the front cover 2 Remove the rear cover 3 Remove the base assembly 4 Disconnect the paper feed motor connector from the system board 5 Remove the four screws A securing the carrier frame to the left and right side frames and remove the carrier frame assembly ...

Страница 37: ...tensions of the two paper flap springs are trapped under the carrier frame C Carrier Transport Motor Removal 1 Remove the front cover 2 Disconnect the transport motor connector from the system board 3 Remove the belt from the transport motor pulley 4 Remove the two screws securing the transport motor to the carrier frame and remove the motor Note the routing of the motor cable ...

Страница 38: ...from the top of the back plate and remove the assembly from the frames Note When reinstalling be sure the edge guide springs are turned to the inside to maintain spring tension on the guides Encoder Card Removal 1 Remove the front cover 2 Remove the printhead carrier assembly 3 Disconnect the printhead cable from the encoder card 4 Remove the screw from the encoder card and remove the card Encoder...

Страница 39: ...g the mid frame to the large feed roll and work the mid frame out of both side frames 8 Spread the right side frame apart far enough to allow removal of the exit drive belt Exit Roller Removal 1 Remove the front cover 2 Remove the two screws from the star roller assembly and remove the assembly 3 Unlatch the left side of the exit roller and remove the exit drive belt from the exit roller pulley 4 ...

Страница 40: ...cover forward and off the printer To reassemble 1 Slide the cover over the matching pieces on the bottom cover 2 Press in both sides opposite the cover latches until they latch Gutter Pad Removal 1 Remove the front cover 2 Remove the rear cover 3 Remove the base assembly 4 Scrape the old gutter pad off the base ...

Страница 41: ... Idler Gears Removal 1 Remove the front cover 2 Remove the rear cover 3 Remove the printer from the base assembly 4 Remove the paper feed motor 5 Gently pry the two idler gears from the left side frame Be careful not to break the locking tabs A ...

Страница 42: ...a small screwdriver break the four prongs off the compound idler gear and remove the idler gear 5 Remove the large feed roll from the mid frame by pulling it out of the four mounting clips Spread the right side frame and remove the large feed roll Note Install the compound idler gear after the printer is installed in the base assembly ...

Страница 43: ...ad door and manual insert tray 4 Remove the C clip from the feed arm assembly and remove the feed arm assembly 5 Remove the C clip from the left side of the pick roll shaft 6 Pull the pick roll shaft out far enough to remove the large gear Note Gently pull the feed arm guide A on the left side frame forward then remove the large gear ...

Страница 44: ...manual insert tray 5 Using a small screwdriver break the four prongs off the compound idler gear A and remove the idler gear 6 Remove the two screws B securing the left side frame to the back plate Slide the left side frame off the back plate Note the relationship of the parts Note Install a new compound idler gear A after the printer is installed in the base assembly ...

Страница 45: ...right before pushing them down on their mounting posts Be sure the wipers are completely seated Manual Insert Tray Removal 1 Remove the front cover 2 Remove the rear cover 3 Remove the paper load door 4 Spread the right side frame away from the manual insert tray until the pins in the insert tray clear the frame 5 Remove the manual insert tray from the left side frame Mid Frame Assembly Removal 1 ...

Страница 46: ...Note the routing of the motor cable Paper Guide and EOF Flag Assembly Removal 1 Remove the front cover 2 Remove the rear cover 3 Remove the printhead carrier assembly 4 Remove the carrier frame assembly 5 Remove the encoder strip 6 Remove the system board 7 Remove the three small feed roll springs 8 Push the locking tabs A to the rear and pull the paper guide down and out of the carrier frame ...

Страница 47: ...77 20X 30X Note During reassembly 1 Be sure the small feed roll spring extensions B are in the groves of the small feed roll arms 2 Be sure the short extensions of the two paper flap springs are trapped under the carrier frame C ...

Страница 48: ...oll shaft out to the left and remove the pick roll shaft hubs and envelope bucklers Note During reassembly be sure the pick roll hubs are in the slots at the bottom of the paper guides and the rolls are centered on the pick pads Power Supply Removal Note When working on the printer always unplug the printer from the wall outlet High voltage is present in the power supply as long as it is plugged i...

Страница 49: ...ble from the encoder card Note the routing of the cable under the retaining clip on the carrier 4 Separate the cradle from the printhead carrier assembly by pushing out the cradle latches A 5 Feed the folded end of the printhead cable through the opening in the carrier assembly and remove the cable Note Use the illustration to assemble the carrier parts in the correct sequence ...

Страница 50: ...4 18 4077 20X 30X Note Be sure the cable is secured under the three retaining clips B on the back of the carrier ...

Страница 51: ...e rod 4 Slide the carrier guide rod to the left out of the printer 5 Lift the carrier out of the printer Printhead Rubber Backer Removal 1 Remove the front cover 2 Remove the printhead carrier assembly 3 Separate the cradle from the printhead carrier assembly by pushing out the cradle latches A 4 Remove the rubber backer and paper deflector from under the printhead carrier cable Note Use the illus...

Страница 52: ...nd press down until the cover latches Be sure the parallel connector snaps do not get trapped behind the cover Right Side Frame Assembly Removal 1 Remove the front cover 2 Remove the rear cover 3 Remove the carrier frame assembly 4 Remove the paper load door and manual insert tray 5 Remove the two screws securing the right side frame to the back plate Slide the right side frame off the back plate ...

Страница 53: ...nect the printhead cables from the system board 3 Disconnect the other cables from the system board 4 Gently release the tension on the encoder strip by flexing the encoder strip tensioner and remove the encoder strip from the left side only 5 Remove the three screws securing the system board to the carrier frame and remove the system board Note the routing of the paper feed motor cable Note The h...

Страница 54: ...Connector Locations 5 1 4077 20X 30X 5 Connector Locations System Board Connectors ...

Страница 55: ... Card Connector Connector Connector Names J1 Printhead Cable 1 J2 Printhead Cable 2 J3 Printhead Cable 3 J4 Printhead Cable 4 J6 Transport Motor J9 Parallel Port J11 Power Supply J12 Paper Feed Motor S1 EOF Sensor SW1 Power Switch U56 Code Module ...

Страница 56: ...ion Specifications Lubricate only when parts are replaced or as needed not on a scheduled basis Use grease P N 1329301 to lubricate the following All gear mounting studs The left and right ends of the large feed roller at the side frames Both ends of the sheet feeder pick roll shaft at the side frames The carrier to carrier frame engagement Note Lubricate the carrier guide rod and carrier guide ro...

Страница 57: ...on the same list Common parts are shown by one index number Parts peculiar to one or the other of the assemblies are listed separately and identified by description NS Not Shown in the Asm Index column indicates that the part is procurable but is not pictured in the illustration PP in the parts descriptions column indicates the part is available in the listed parts packet ...

Страница 58: ...7 2 4077 20X 30X Assembly 1 Covers ...

Страница 59: ... Button LED Lens 4077 201 2 13A1439 1 Front Cover Asm Access Cover Button LED Lens 4077 202 2 13A1528 1 Front Cover Asm Access Cover Button LED Lens 4077 204 2 13A1326 1 Front Cover Asm Access Cover Button LED Lens 4077 203 2 13A1258 1 Front Cover Asm Access Cover Button LED Lens 4077 301 3 69G4118 1 Rear Cover 3 13A1444 1 Rear Cover 4077 202 204 4 69G4119 1 Gutter Pad Base Asm NS 13A1257 1 Tray P...

Страница 60: ...7 4 4077 20X 30X Assembly 2 Frames ...

Страница 61: ... Sub Asm White without Gears Also order gears B M 69G4127 2 1 13A1449 1 Left Side Frame Sub Asm Black without Gears Also order gears B M 69G4127 2 13A1279 1 Mid Frame Asm 3 13A1236 1 Right Side Frame White 3 13A1446 1 Right Side Frame Black 4 69G4122 1 Carrier Frame 5 69G4188 4 Screw Frame Mounting PP ...

Страница 62: ...7 6 4077 20X 30X Assembly 3 Paper Feed ...

Страница 63: ... M and Paper Flap 3 13A1279 1 Star Roller Asm part of Mid Frame 4 70G0575 1 Large Feed Roll Asm includes Small Compound Idler Gear 5 13A1221 1 Paper Feed Motor Motor Gear Toroid 6 69G4127 1 Gears B M 7 69G4398 1 Feed Arm Asm 8 69G4188 2 C Clip PP 9 69G4188 3 Spring Small Feed Roll PP 10 69G4188 2 Screw Paper Feed Motor Mounting PP 11 70G0577 1 Exit Roller 12 70G0579 1 Exit Drive Belt ...

Страница 64: ...7 8 4077 20X 30X Assembly 4 Electronics ...

Страница 65: ...Argentina Power Cord Austria Power Cord Belgium Power Cord Bolivia Power Cord Brazil LV Power Cord Brazil HV Power Cord Canada Power Cord Chile Power Cord Columbia Power Cord Costa Rica Power Cord Denmark Power Cord Ecuador Power Cord Egypt Power Cord El Salvador Power Cord Finland Power Cord France Power Cord Germany Power Cord Guatemala Power Cord Honduras Power Cord Israel Power Cord Italy Powe...

Страница 66: ...7 10 4077 20X 30X Assembly 4 Electronics continued ...

Страница 67: ...Parts Catalog 7 11 4077 20X 30X Asm Index Part Number Units Description 4 4 13A1223 1 Code Module 5 69G4188 5 Screw System Board Mounting PP ...

Страница 68: ...7 12 4077 20X 30X Assembly 5 Carrier ...

Страница 69: ... B M 2 69G4155 1 Printhead Cable Folded 3 1367109 1 Rubber Backer 4 69G4157 1 Carrier Guide Rod 5 69G4156 1 Encoder Card Asm 6 69G4188 1 Screw Encoder Card Mounting PP 7 69G4188 1 Retainer Right Carrier Guide Rod PP 8 69G4188 1 E Ring Carrier Guide Rod PP 9 13A1225 1 Printhead Cartridge Interlock Key B M ...

Страница 70: ...7 14 4077 20X 30X Assembly 6 Carrier Transport ...

Страница 71: ...iption 6 1 69G4158 1 Carrier Transport Motor Pulley 2 69G4159 1 Carrier Belt 2 13B0215 1 Carrier Belt New Style 3 69G4403 1 Encoder Strip 4 69G4163 1 Idler Pulley Tension Asm 5 69G4188 2 Screw Carrier Transport Motor Mounting PP 6 69G4188 1 Tensioner Encoder Strip PP ...

Страница 72: ...7 16 4077 20X 30X Assembly 7 Sheet Feeder ...

Страница 73: ... White 3 13A1451 1 Upper Paper Support Black 4 13A1229 1 Pick Roll Paper Load Shaft B M 5 1367463 2 Pick Roll Hub Asm 6 1367019 1 Envelope Buckler B M Left Right 7 69G4169 1 Back White 7 13A1448 1 Back Black 8 13A1226 1 Paper Load Door White 8 13A1440 1 Paper Load Door Black 9 69G4165 1 Manual Insert Tray White 9 13A1447 1 Manual Insert Tray Black 10 69G4188 1 E Ring PP 11 69G4188 4 Screw Side Fra...

Страница 74: ...7 18 4077 20X 30X Assembly 8 Maintenance Station 1 3 2 ...

Страница 75: ...Parts Catalog 7 19 4077 20X 30X Asm Index Part number Units Description 8 1 13A1231 1 Maintenance Station Asm 2 1367389 1 Wiper and Cap B M one of each 3 69G4188 1 Screw Maintenance Station Mounting PP ...

Страница 76: ... POST Sequence 2 2 Symptom Table 2 3 Power Consumption 1 1 Preventive Maintenance 6 1 Problems Carrier Transport 2 4 Communications 2 4 Maintenance Station 2 4 Paper Feed 2 5 Power 2 5 Print Quality 2 5 R Removals Base Assembly 4 3 Carrier Belt 4 3 Carrier Frame 4 4 Carrier Transport Motor 4 5 Code Module 4 6 Edge Guide Asm 4 6 Encoder Card 4 6 Encoder Strip 4 6 Envelope Bucklers 4 16 EOF Flag Asm...

Страница 77: ...ker 4 19 Rear Cover 4 20 Right Side Frame 4 20 Small Feed Roll Shaft 4 21 Small Feed Rollers 4 21 Star Roller 4 21 System Board 4 21 Repair Information 4 1 S Safety Information vii Service Checks Envelope Feed 2 6 First Print Line 2 6 Maintenance Station 2 7 Paper Feed 2 8 Paper Path 2 11 Parallel Port 2 12 Power 2 12 Print Quality 2 13 Transport 2 15 Start 2 1 Symptom Table POST 2 3 Symptom Table...

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