Motorola SSETM 5000 service manual Top/Side Button Test

9-14 Troubleshooting Charts: Top/Side Button Test

9.9Top/Side Button Test

Top/Side

Button Test

Verify operation of channel knob using Button Test flowchart

Using RSS,	Yes	Button
verify problem
button is enabled		check OK?
for function
			No

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

Buttons

Enabled?

No

Use RSS to enable button

	Using a voltmeter, measure the voltage at
	U504 pin 3 while depressing the following
Yes	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.

Replace	Yes	Levels	No	Verify physical
				operation of
U501		correct?
				buttons

Buttons		No	Replace
			Housing
OK?
			Assembly
	Yes

Verify connections and control top/PTT flex circuit and repair as necessary

November 11, 2004 6881094C12-A