Service manual

Confidential BTP-M280 Service Manual
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5.1.7 Lower mark sensor replacing
1) Turn off the power.
2) Disassemble the printer cover according to steps in 4.2.1, then detach the paper near end sensor,
CR motor, paper end sensor, rear cover micro-switch and mark sensor from main control board.
3) Unscrew the 4 ST2.9X6 and take the paper holder module off.
4) Unscrew the 2 ST2.9X6 and take the float wheel module off.
5) Unscrew the 2 ST2.2X4 screws and take lower mark sensor off.
6) Install a new lower mark sensor and reassemble by following these steps in reverse order.
Notice：
 When the lower mark sensor is fixed in position , please replace sensor in above step. When the ①
lower mark sensor is fixed in position , please over the step 4 above.②③④
 In disassembling the printer cover, please use moderate force to avoid damaging the cover.
 Please do not pull the cable when detaching the connector, so as to avoid breaking the cable.
 Please make sure that all the connectors connect to their sockets firmly.
 Please avoid crushing the cable in reassembly.
 In reassembling, please fix all screws firmly.