Tokyo Boeki Labmax 240, Service Manual

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4‑28
3. In case that the voltage is not correctly adjusted, the following
phenomenon can be seen.
1. When the voltage is lower;
Communication with PC (Down loading) might be impossible.
Units might malfunction.
2. When the voltage is higher (higher than 5.3V);
Protection network in DC plus-minus15V, 5V power supply works, and the
output voltage becomes zero.
4. How to adjust the voltage
DC plus-minus15V, 5V power source Enlarged Volume Part
Set the tips of digital voltmeter.
Enlarged DC5V Input Part
1. Set the tips of digital voltmeter to DC input terminals of Mother Board.
2. Turn the orange volume of DC plus-minus 15V, 5V power source to adjust
the voltage of DC input terminals to the range of 5.18V -> 5.20V.
Volume Volume