Motorola SSETM 5000 - Manual (Page 118)

November 11, 2004 6881094C12-A
9-14 Troubleshooting Charts: Top/Side Button Test
9.9 Top/Side Button Test
Use RSS
to enable
button
Replace
U501
Replace
Housing
Assembly
Verify connections
and control top/PTT
flex circuit and
repair as necessary
Using RSS,
verify problem
button is enabled
for function
Levels
correct?
Verify physical
operation of
buttons
Buttons
OK?
Button
check OK?
Buttons
Enabled?
Using a voltmeter, measure the voltage at
U504 pin 3 while depressing the following
buttons:
- Display
- Top Side Button
- One-Dot Side Button
- Two-Dot Side Button
The voltage for each depressed
button should be 0 V. The voltage for
each button when not depressed should
be 2.9 V.
Top/Side
Button Test
Synopsis
This chart relates to a failure in
reading the buttons: Display,
Top Side Button, One-Dot Side
Button, or Two-Dot Side Button.
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
Verify operation
of channel knob
using Button Test
flowchart
No
No
Yes
Yes
No
No
Yes
Yes