EDAN SE-601B - Key Board Test

SE-601 Series Electrocardiograph Service Manual Inspection and Troubleshooting
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5.3.3 Key Board Test
To verify the key board,
1) Open the main unit following the procedures described in Chapter 6, “Electrocardiograph
Disassembly”.
2) Switch on the device.
3) Measure the voltage to earth of the test points listed below by using a multimeter.
Item
Test point
Reference result
①
T3V3
3.3±0.1V
②
T+5V
5±0.5V
③
GND
4) Compare the measurement results with the reference results in the list. If any one of the
results exceeds the reference range, the key board defection is confirmed. Replacement of the
key board is recommended.
② T+5V
③ GND
1
① T3V3
1
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