Ricoh D146 Service Manual page 17

4.16.6 DOUBLE FEED SENSOR (D150 ONLY) ................................ 4-140
4.17 ELECTRICAL COMPONENTS ........................................................ 4-142
4.17.1 OVERVIEW ............................................................................. 4-142
Printed Circuits/Parts Inside the Controller Box ............................... 4-142
Printed Circuits Behind the Controller Box. ...................................... 4-143
Printed Circuit/Parts Inside the Power Box ....................................... 4-143
Printed Circuits Behind the Power Box............................................. 4-144
4.17.2 IPU SUB (SPDF ONLY) .......................................................... 4-144
4.17.3 IPU .......................................................................................... 4-145
4.17.4 BCU ......................................................................................... 4-147
Replacing the NVRAM (EEPROM) on the BCU ............................... 4-147
4.17.5 CONTROLLER BOARD .......................................................... 4-148
NVRAMs on the controller board ...................................................... 4-149
4.17.6 HDD ........................................................................................ 4-150
Adjustment after replacement .......................................................... 4-151
4.17.7 CPU COOLING FAN ............................................................... 4-151
4.17.8 IMAGING IOB ......................................................................... 4-151
4.17.9 HVP_TTS ................................................................................ 4-152
4.17.10 PSU (AC CONTROLLER BOARD) ...................................... 4-153
4.17.11 PSU (DC POWER) .............................................................. 4-153
4.17.12 PAPER TRANSPORT IOB .................................................. 4-154
4.17.13 HVP-CB ............................................................................... 4-155
4.18 FANS/FILTERS ................................................................................ 4-156
4.18.1 OZONE FILTER/DUST FILTER .............................................. 4-156
Adjustment before replacing the dust filter ....................................... 4-156
Replacement .................................................................................... 4-156
4.18.2 ODOR FILTER ........................................................................ 4-157
4.18.3 DEVELOPMENT INTAKE FAN/RIGHT ................................... 4-158
4.18.4 DEVELOPMENT INTAKE FAN/LEFT ..................................... 4-159
4.18.5 OZONE EXHAUST FAN ......................................................... 4-159
4.18.6 PAPER EXIT COOLING FAN ................................................. 4-160
4.18.7 FUSING EXHAUST HEAT FAN .............................................. 4-160
4.18.8 DRIVE COOLING FAN (D148/D149/D150) ............................. 4-161
4.18.9 MAIN EXHAUST FAN (D148/D149/D150) .............................. 4-162
4.18.10 TONER SUPPLY COOLING FAN ....................................... 4-163
D148/D149/D150 ............................................................................. 4-163
D146/D147 ....................................................................................... 4-164
4.18.11 PSU COOLING FAN ............................................................ 4-165
4.18.12 PSU EXHAUST HEAT FAN (D148/D149/D150) .................. 4-166
D146/D147/D148/D149/D150 xii SM