SERVICE MANUAL - O. Rensch OHG

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2DC 2-3-5 High voltage board The high voltage board contains the high voltage output circuit, interlock switch circuit as well as providing a liaison connection with the power supply board, bias board, and the engine board. High voltage board Engine board High voltage output circuit Bias board MHVDR Control and driver circuit Main charger THVDR, RTHVDR PSEL1, PSEL2 HVISEL Control and driver circuit Transfer bias output positive voltage circuit Transfer roller Power supply board +24V3 +24V2 FET +24V2 Interlock switch +24V2 +24V1 FAN, HEATN, SLEEPN ZCROSS, THERM, EXITN +5V +5V Figure 2-3-9 High voltage board circuit block diagram 2-3-10
(1) Interlock switch The interlock switch is located on the high voltage board and opened and closed in conjunction with the front cover or the front top cover via the interlock lever. This switch connects and disconnects the +24 V DC power supply line. If the front cover or the front top cover is open, the interlock switch is open, and the +24 V DC to the high voltage output circuit, bias board, engine board, and the power supply board is disconnected, deactivating the high voltage output, laser output, main motor output for safety. The cooling fan is an exception: Since the cooling fan is directly fed with +24 V DC from the power supply unit at the primary side (+24V1) of the interlock switch, the cooling fan is not deactivated even the cover is open. 2DC Front top cover Projection Interlock lever Projection Engine board, Bias board, etc. Power supply unit +24V2 Front cover +24V2 Triac, etc. +24V2 High voltage output circuit Interlock switch +24V2 +24 V DC output +24V1 +24V1 Machine left side view Cooling fan High voltage board Figure 2-3-10 Interlock switch 2-3-11
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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
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2DC (1) Removing the separation cla
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2DC (3) Removing the heat roller WA
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2DC (4) Removing the thermistor 1.
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2DC (6) Removing the press roller W
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2DC 4. Remove the two screws. 5. Sl
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2DC 6. Remove three screws. 7. Remo
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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 and 156: (5) Transfer The image developed by
Page 157 and 158: 2DC (6-1) Fuser unit mechanism 0 !
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: 2DC 2-3-4 Bias board The bias board
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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