GE MAC 5500, Service Manual

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4-10 MAC

5500 resting ECG analysis system Revision E

2020299-020
Troubleshooting: Diagnostic Tests
Speaker Test
Use the arrow pad to select Loud or Soft . Press the Enter key to produce a loud or
soft tone. (The tone level difference is minimal.)
If tone is not audible, the main CPU board may need replacement. (Speaker is part
of CPU board.)
Highlight Return and press the Enter key to return to the System Diagnostics menu.
Keyboard Test
Press each key and verify that the key is highlighted on the screen and also displayed
at the top of the screen. (It is normal for a dim background image to remain on the
screen when you select the next key.) The numeric value that displays at the top of
the screen is the scan code representation of the pressed key.
NOTE
The display shows keys in the upper part of the screen that are only available
with the MAC 5500 ST keyboard.
 Check both of the Shift keys by pressing each in combination with a letter to
display a capital letter.

Press the center of arrow pad control and verify that the word IN displays on
screen. Press arrows to change the displayed arrow position. A beep sounds
with each arrow press.
 Press the Shift key and the F6 key to exit the test.