Lcd/Keyboard Buffer Removal; Lcd/Keyboard Buffer Replacement; Checks After Replacement - Schiller Cardiovit AT-10 Service Handbook

Chapter 4
Physical Overview & Module Replacement
LCD / Keyboard Buffer MK 8-4 (cont.)

LCD/Keyboard Buffer Removal

To remove the LCD/Keyboard Buffer proceed as follows:
1. Disconnect all connectors from the board.
2. Remove the three retaining screws and gently ease the board away from the case.

LCD/Keyboard Buffer Replacement

To replace the LCD/Keyboard Buffer board proceed as follows:
1. Position the board and secure with the three screws.
2. Connect all connectors.

Checks after Replacement

1. After assembly, connect mains to the unit and switch on. Ensure that the mains LED lights.
2. Switch the unit on and ensure that the LCD lights and that straight line traces are displayed
for the selected leads. Ensure that the `information box´ in the top right hand corner of the
display is clearly defined and that all characters are correctly formed.
3. Enter the patient data screen by pressing <PATIENT DATA> and systematically press each
of the keyboard characters. Check the LCD and ensure that the correct characters are
displayed as entered.
Page 4.38
SCHILLER AT-10 ECG and Spirometry Unit
SERVICE HANDBOOK Issue c April 2002