GE MAC 600 SPY, Service Manual

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3-8 MAC
TM
600 Revision G
2047426-002
Troubleshooting: General Fault Isolation
NOTE
If the color option is disabled in the device, display will show a
white bar in place of the four color bars.
3. Press the right arrow key on the keypad to move the color bars
horizontally across the screen.
4. Verify that the color band pattern (white, green, red, blue) scrolls
across the screen.
5. Pass the test if the pattern is replicated without discoloration.
6. Press F1 to cycle through the solid color pane (white, green, red, and
blue). For each pane, check for black pixels.
NOTE
1. Press F1 while the display is showing blue color pane, the
screen will flicker briefly. This is not a problem.
2. Ignore the battery icon area on top right corner of the display
while doing this test.
3. If the color option is not enabled, you will see only a white color
pane.
7. Pass the test if no more than four black pixels are observed on any
single color pane. Note that a black pixel observed on one pane will
be observed on every pane.
8. Press esc or return to return to the Diagnostics menu.
NOTE
The Gray Scale Test Patterns is for manufacturing use only.
Testing the Buzzer
1. From the Diagnostics menu, select Buzzer Test.
The following window opens.
2. From the Buzzer test menu, select Test Buzzer.
3. Listen for a brief tone.
4. Press esc to return to the Diagnostics menu.