Service manual

7. ADJUSTMENT
7.2 Service Manual BSM-4100
1. Connect the EXT2 board of the kit to the recorder unit. Refer to “YS-073P8
Board/Unit Maintenance Kit” in Section 6.
2. Short pins 1 and 2 at the jumper setting terminal on the EXT2 board.
3. Connect +5 V DC of a +5 V DC power supply to the +5 V input terminal on the
EXT2 board.
4. Connect the ground terminal of the +5 V DC power supply to the ground
terminal on the EXT2 board.
5. Set the recording paper inside the paper magazine according to the operator’s
manual “Loading the Recording Paper” in Section 2 PREPARATIONS.
6. Draw out one page of the recording paper so that the small black square on the
corner of the paper is not over the mark detection sensor.
7. Adjust the PAPER VR and MARK VR so that the PAPER and MARK test pins
on the EXT2 board output a voltage within the range of 3.5 V DC to 4.0 V DC
when the two sensors detect the white part of the paper.
1. Connect the EXT2 board between the recorder unit and MAIN board
connected to the instrument. Refer to “YS-073P8 Board/Unit Maintenance
Kit” in Section 6.
2. Short pins 3 and 4 at the jumper setting terminal on the EXT2 board.
3. Turn on the instrument.
4. Set the recording paper inside the paper magazine according to the operator’s
manual “Loading the Recording Paper” in Section 2 PREPARATIONS.
5. Draw out one page of the recording paper so that the small black square on the
corner of the paper is not over the mark detection sensor.
6. Connect the probe of the oscilloscope to the PAPER or MARK test pin on the
EXT2 board.
7. Connect the ground clip of the oscilloscope to the ground pin on the EXT2
board. The following rectangular waveform (16 ms interval) appears on the
screen of the oscilloscope.
Adjusting the Output
Voltages with the YS-073P8
Board/Unit Maintenance
Kit and Digital or Analog
Multimeter
Adjusting the Output
Voltages with the YS-073P8
Board/Unit Maintenance
Kit and Oscilloscope