Volume Set Error - Motorola ASTRO XTSTM 4000 Detailed Service Manual

Troubleshooting Charts: Volume Set Error
5.6

Volume Set Error

Refer to "No
Receive Audio"
flow chart
Any Digital data
or activity?
6871620L01-C
Volume
Set Error
Verify operation
of volume
Buttom Test
flow chart
Volume
Yes
button OK?
No
Using a voltmeter,
measure voltage at
C1106. The value
should be V2
Replace
Volume control
button flex
Synopsis
This chart relates to failure in the volume
button. Basic failure modes are as follows:
1) Bad connection
2) Defective volume control button
3) Detective MAKO IC U1304
4) Problem in receive audio circuit
Voltage
Functional?
Yes
Replace Mainboard
to Top and Side
Control Flex J(3)
Volume
No
pot OK?
Yes
Verify contact
with circuit
board
No
Replace
Mainboard
May 28, 2008
5-13