6. Defective paper feeder driver PCB
Action:
Replace the paper feeder driver PCB.
7. Defective engine controller PCB
Action:
Replace the engine controller PCB.
J-5. Transfer and feed block
<Possible causes>
1. Paper is curled downward
Action:
When a paper 180mm or less in length is jammed before reaching the fixing roller,
examine whether the paper is curled downward. If it is, straighten the paper, and
then instruct the user.
2. If the paper does not reach the registration arm, perform step 10 and thereafter.
3. Dirty, worn, or deformed pre-transfer roller
Action:
Clean the pre-transfer roller if dirty. Replace it if worn or deformed.
4. Dirty or worn registration arm
Action:
Clean the registration arm if dirty. Replace it if worn.
5. Registration arm does not move smoothly, or the spring is out of place.
Action:
Adjust the arm so that it move smoothly. If the spring is out of place, attach it or
replace it.
6. Top of page sensor lever does not move smoothly, or is damaged.
Action:
Adjust the lever so that it moves smoothly. Replace it if damaged.
7. Transfer charging roller does not move smoothly.
Action:
Replace the busing. Replace the gear if worn.
8. Damaged feed belt
Action:
Replace the belt.
9. Damaged feed belt drive gear
Action:
Replace the gear.
10. Dirty, worn, or deformed feed roller
Action:
Clean the feed roller if dirty. Replace it if worn or deformed.
11. Damaged gears
Action:
Remove the multi-purpose tray pick-up unit, and replace any damaged gears.
12. Defective feed roller clutch
Action:
Disconnect the feed roller clutch connector J128. Measure the resistance between
cable side connector J128-1 and J128-2. If it is not about 145 , replace the feed
clutch.
13. Defective engine controller PCB
Action:
Replace the engine controller PCB.
4 - 19
CHAPTER 4
Содержание LBP1760P
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Страница 148: ...4 Remove the screw then take out the paper feeder driver PCB Screw Paper feeder driver PCB Figure 3 8 10 3 34 CHAPTER 3...
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Страница 218: ...IX LOCATION OF ELECTRICAL PARTS A Switches Figure 4 9 1 4 56 CHAPTER 4 SW801 SW802 SW803 SW600 SW601 SW602 SW101...
Страница 220: ...B Sensors Figure 4 9 2 4 58 CHAPTER 4 PS104 TH901 PS106 PS501 PS101 PS102 PS103 PS105 PS701 PS703 PS702...
Страница 222: ...C Clutches Solenoids Figure 4 9 4 4 60 CHAPTER 4 SL102 CL101 SL101 SL701...
Страница 224: ...D Motors Others Figure 4 9 6 4 62 CHAPTER 4 FM101 H901 M101 FM701 M702 M701...
Страница 226: ...E PCBs Figure 4 9 7 4 64 CHAPTER 4...
Страница 229: ...Figure 4 9 9 4 67 CHAPTER 4 J604 J602 J601 J104 J105 J72 J110 J603 J6 J7 J1 J8 J5 J4 J3 J2...
Страница 231: ...APPENDIX I GENERAL TIMING CHART A 1 II GENERAL CIRCUIT DIAGRAM A 3 III LIST OF SIGNALS A 5 IV MESSAGE TABLE A 11...
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Страница 256: ...CD 1 5 COPYRIGHT C 1998 CANON INC CANON LBP 1760 REV 0 MAY 1998 PRINTED IN JAPAN IMPRIME AU JAPON...
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