Schiller AT-101, Service Handbook

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Care & Maintenance 5
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Service Handbook Functional test 5.2
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5.2.3 Mains indicator LED test
5.2.4 Power Supply test
Measuring of unload- and operating current of the device.
1. Connect the multi meter at the power input to measure the current.
2. Check current as follows:
– Unloaded current (device switched off) 35...70 mA
– Operating current (device switched on) 45...85 mA
5.2.5 Keyboard test
Check following items:
• Check the keyboard for mechanical damage. If any can be seen, the keyboard is
to be replaced.
• Check all function keys for their proper operation. An acoustic confirmation ap-
pears whenever a function key is pressed.
• Test the alphabetical keyboard as follows:
– With C device, go to the menu "Edit Interpretation" and test all keys.
– In all other devices, the test is carried out in the menu "Patient Data".
5.2.6 LCD Screen test
1. Connect the power cable at the rear of the unit.
• The mains indicator lamp (6) is always lit when the unit is connected to the mains
supply.
2. Switch the unit on.
• The relevant symbol is displayed on the LCD (7).
3. Disconnect the power cable.
• The mains indicator lamp (6) switches off and the symbol battery is displayed on
the LCD (7).
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1. Press the function key FN and the UP/DOWN arrows to adjust screen contrast.
2. Check following:
– The contrast has to be variable from very dark to very light.
– Visually check the screen for spots, or black fields. If such appear, the LCD has
to be replaced. The LCD has to be the same shade everywhere. If one side is
darker, the background lighting should be checked.