5.10 Top/Side Button Test - Motorola ASTRO XTS 5000 Detailed Service Manual

Troubleshooting Charts: Top/Side Button Test

5.10 Top/Side Button Test

Using RSS,
verify problem
button is enabled
for function
Buttons
Enabled?
No
Use RSS
to enable
button
No
Replace
U501
6881094C31-D
Top/Side
Button Test
Verify operation
of zone knob
using Button Test
flowchart
Button
Yes
check OK?
Using a voltmeter, measure the voltage at
U504 pin 3 while depressing the following
buttons: Emergency, Side Button 1, Side
Yes
Button 2, and Side Button 3.
The probe points are as follows:
Button
Emergency
Top Side
Middle Side
Bottom Side
None Pressed
Yes
Levels
Replace
correct?
U504
Yes
Problem
End
fixed?
This chart relates to a failure in
reading the buttons: Emergency,
Side Button 1, Side Button 2, or
Side Button 3.
Basic failure modes are as follows:
1) Failure in controls flex circuit
2) Bad connection
3) Defective Switch
4) Defective A/D port in GCAP II
No
Voltage
0.18V
1.40V
1.70V
2.00V
2.50V
Verify physical
No
operation of
buttons
Buttons
OK?
Verify connections
and control top/PTT
flex circuit and
repair as necessary
Synopsis
Replace Front
No
Cover Housing
Assembly
Yes
MAEPF-27400-O
July 21, 2004
5-17