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Alpha Vision Tech Alpha-3R service manual Paper sensor, Description, 3.3V, Bm E, Bm R

Models: Alpha-3R

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Paper sensor
Pin	Description
1	3.3V
9	BM_E
2	BM_E
3	BM_R
4	3.3V

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Image 8

Alpha Vision Tech Alpha-3R service manual Paper sensor, Description, 3.3V, Bm E, Bm R

Contents

SERVICE Alpha-3RDirect Thermal Portable Printer MANUALContents 5. Maintenance1.LED indicator 2.Feed button 3.Power on/off button5.Media holder adjustment knob 6.Media cover 1. FUNDAMENTAL OF THE SYSTEM5.Black mark sensor Interior View1.Tear edge 2.Print head 3.Media holder 4.Platen Rear View 1.Li-ionbattery 2.Battery open clasp3.USB interface 4.Power jack 5.Interface cover Main board top 2.1 Summary of Board Connectors2. ELECTRONICS Description Paper sensor Description3.3V BM EMain board bottom ConnectorBattery connector Description3. MECHANISM 2. Take the printer top cover off4. Reassemble the parts in the reverse procedures 4. Reassemble the parts in the reverse procedures 3.2 Replacing the Keys Control Board2.Remove two screws on the keys control board 4. Reassemble the parts in the reverse procedures 3.3 Replacing the Bluetooth Module Option3. Disconnect the connector on the board 3.4 Replacing the Media Holder Assembly 5. Reassemble the parts in the reverse procedures 3.5 Replacing the Main Board Assembly 3.6 Replacing the Print Head Assembly 3.7 Replacing the Stepping Motor 2.Remove the gear holder and two gearsGear holder Gears 3. Remove two screws 4. Reassemble the parts in the reverse procedures3. Reassemble the parts in the reverse procedures 3.8 Replacing the black mark sensor assemblyBlack mark sensor assembly 3.9 Replacing the WiFi Module Option 4.Replace the WiFi control board5.Reassemble the parts in the reverse procedures 2.Remove two screws on the board4.TROUBLESHOOTING 4.1 Common ProblemsThe RS-232setting is incorrect Re-setthe Rs-232settingIrregular printing The printer is in Hex Dump mode5.Maintenance 2.The cleaning process is described as following Lint-freecloth  Vacuum / Blower brush  100% ethanolRevise History ContentDate Editor

Paper sensor

BM_E

BM_R