EDAN SE-1200 Express - Key Board Test

SE-1200 Series Electrocardiograph Service Manual Inspection and Troubleshooting
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5) Compare the measurement results with the reference results in the list. If any one of the
results exceeds the reference range, the ECG board defection is confirmed. Replacement of
the ECG board is recommended.
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
② V- ④ -2.5V ⑥ V+ ① 5V ③ 2.5V
⑤
3.3 V