Side Button Error - Motorola APX 3000 Detailed Service Manual

5-22
5.5

Side Button Error

SIDE BUTTON
TEST
Verify operation of buttons by using
Button Test" flowchart
Button check
OK?
No
Verify physical connection between the
main flex, side control flex and
Main Board. Re-run button test.
Button check
OK?
No
Use a voltmeter to measure voltage at the
following resistors on the Main board
(1.875V @ each point):
R4005 - PTT, R4006 - Side button 1,
R4007 - Side button 2, R6101 - Monitor
Are the
voltages
present?
Yes
Monitor thr voltages at each resistor while
pressing the corresponding button. The
voltages 0V while the button is pressed.
Voltages = 0 while
button press?
No
Replace main
chassis
Troubleshooting Charts: Side Button Error
Yes
Verify buttons
enabled in CPS
Yes
END
No
Follow troubleshooting
guide 5.4.4
Yes
Re-run button test