SERVICE MANUAL - O. Rensch OHG

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2DC (6) Fusing The toner on the paper is molten and pressed into the paper as it passes between the heat roller A and the press roller B in the fuser unit. A B Figure 2-1-16 Fusing The heat roller has a halogen lamp inside which continuously turns on and off by the thermistor to maintain the constant temperature onto the heat roller surface. The heat roller is resin coated by florin to prevent toner from accumulating on the roller after a long run. Care must be taken while handling the heat roller not to scratch the roller surface as doing so may result in print problems. The heat roller has four claws which are continuously in contact with its surface. These claws prevent the paper on which toner has been fused from being wound around the heat roller causing paper jam. The pressure roller is made of the heat-resistant silicon rubber. This roller is used to strongly press the paper towards the heat roller by means of coil springs. The temperature of the heat roller is constantly monitored by the engine board using the thermistor and triac. Should the temperature of the heat roller exceed the predetermined value, the thermal cutout is activated to effectively disconnect the heater (halogen) lamp from power. 2-1-16
2DC (6-1) Fuser unit mechanism 0 ! @ 1 2 9 8 7 4 3 6 5 Figure 2-1-17 Fuser unit mechanism 1 Heat roller 2 Idle gear Z34 3 Exit gear Z23 4 Idle gear Z18 5 Heat gear Z33 6 Press roller 7 Heater lamp 8 Thermal cutout 9 Separator(s) 0 Thermistor ! Exit pulley(s) @ Lower exit roller 2-1-17
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KM-1500 SERVICE MANUAL Published in
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Safety precautions This booklet pro
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1. Installation Precautions WARNING
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• Do not pull on the AC power cor
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2DC (8) The eraser lamp does not tu
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2DC 1-1-1 Specifications Type......
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2DC (2) Operation panel * ⁄ ( ^ @
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2DC 1-3-1 Unpacking and installatio
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CAUTIONS • Be sure to hold both t
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2DC 3. Remove the nine tapes, the t
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2DC 3. Remove the process unit from
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2DC 9. Hold the process unit stable
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2DC Connect the power cord. 1. Conn
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2DC 4) Press down on the stopper ex
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2DC 1-3-2 Installing the document p
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2DC CAUTION Be sure to tighten the
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2DC 1-4-1 Maintenance mode The copi
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2DC Section Fixing and cleaning Ope
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2DC Maintenance item No. U005 U019
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2DC Maintenance item No. U087 Descr
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2DC 1-5-1 Paper misfeed detection (
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Section Jam code Description Condit
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Problem Causes/check procedures Cor
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2DC • DP Problem Causes/check pro
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2DC Code Contents Causes Remarks Ch
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2DC Code Contents Causes Remarks Ch
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2DC 1-5-3 Image formation problems
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2DC (3) Image is too light. Causes
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2DC (9) Black dots appear on the im
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2DC (15)Fixing is poor. Causes 1. W
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Problem Causes Check procedures/cor
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2DC 1-5-5 Mechanical problems Probl
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2DC 1-6-2 Removing the process unit
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2DC (2) Removing the right cover 1.
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2DC 1-6-5 Removing the MP feed roll
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2DC 1-6-6 Removing the transfer rol
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2DC (2) Removing the main board 1.
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2DC (3) Removing the power supply b
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2DC 1-6-8 Removing the main motor a
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2DC 10. Remove the main board (See
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2DC 1-6-9 Removing and splitting th
Page 105 and 106: 2DC (1) Removing the separation cla
Page 107 and 108: 2DC (3) Removing the heat roller WA
Page 109 and 110: 2DC (4) Removing the thermistor 1.
Page 111 and 112: 2DC (6) Removing the press roller W
Page 113 and 114: 2DC 4. Remove the two screws. 5. Sl
Page 115 and 116: 2DC 6. Remove three screws. 7. Remo
Page 117 and 118: 2DC 1-6-12 Removing the ISU unit 1.
Page 119 and 120: 2DC 1-6-13 Removing the exposure la
Page 121 and 122: 2DC 1-6-14 Removing the scanner mir
Page 123 and 124: 2DC 7. Remove three screws and then
Page 125 and 126: 2DC 1-6-16 Removing the main charge
Page 127 and 128: 2DC (2) Adjusting the center line o
Page 129 and 130: 2DC (4) Adjusting the amount of sla
Page 131 and 132: 2DC (6) Adjusting magnification of
Page 133 and 134: 2DC (8) Adjusting the scanner cente
Page 135 and 136: 2DC (10) Adjusting the DP magnifica
Page 137 and 138: 2DC (12) Adjusting the DP trailing
Page 139 and 140: 2DC (14) Adjusting the margins for
Page 141 and 142: 2DC 2-1-1 Paper feeding system The
Page 143 and 144: 2DC (2) Paper feeding mechanism Dri
Page 145 and 146: 2DC Scanner unit Original ISU unit
Page 147 and 148: 2DC 2-1-3 Electrophotographic syste
Page 149 and 150: 2DC (2) Main charging (2-1) Photo c
Page 151 and 152: 2DC (3) Exposure The charged surfac
Page 153 and 154: (3-2) Drum surface potential The la
Page 155: (5) Transfer The image developed by
Page 159 and 160: 2DC 2-2-1 Electrical parts layout (
Page 161 and 162: 2DC 2-3-1 Main board +5V ASIC debug
Page 163 and 164: (1) Eraser lamp control circuit The
Page 165 and 166: The AC power for the heater is appl
Page 167 and 168: (3) Polygon motor control circuit T
Page 169 and 170: 2DC 2-3-4 Bias board The bias board
Page 171 and 172: (1) Interlock switch The interlock
Page 173 and 174: 2DC 2-3-7 Operation board The opera
Page 175 and 176: 2DC Timing chart No. 1 Continuous c
Page 177 and 178: 2DC Timing chart No. 3 Continuous c
Page 179: KYOCERA MITA EUROPE B.V. Hoeksteen
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SERVICE MANUAL - O. Rensch OHG

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