Motorola ATS 3000 User Manual

February 14, 2012 6816985H01-F
6.2-10 UHF1 Troubleshooting Charts: Volume Set Error Troubleshooting Chart
6.2.11 Volume Set Error Troubleshooting Chart
MAEPF-27336-O
No
No
No
Yes
Yes
Yes
Volume
Set Error
Using a voltmeter,
measure voltage at
R505 when volume
knob is on. The value
should be 3.0V.
Voltage
Functional?
Replace
U701
Verify contact
with circuit
board
Volume
check OK?
Refer to "No
Receive Audio"
flow chart
Verify operation
of volume knob
per "Button Test"
flow chart
Volume
pot OK?
Replace
Volume
Switch
This chart relates to a failure in the volume
set knob. Basic failure modes are as follows:
1) Bad connection
2) Defective volume control pot
3) Defective MAKO IC (U701)
4) Problem in receive audio circuit
Synopsis
Measure voltage from
C520 to GND while
moving volume knob
from min to max. Max
volume is 2.50V

Motorola ATS 3000 Specifications

General

Brand	Motorola
Model	ATS 3000
Category	Two-Way Radio
Language	English