Motorola ATS 3000

February 14, 2012 6816985H01-F
6.4-20 700/800 MHz Troubleshooting Charts: VOCON Transmit Audio Troubleshooting Chart (2 of 2)
6.4.21VOCON Transmit Audio Troubleshooting Chart (2 of 2)
MAEPF-27334-O
No
No
No
No
Y
es
Y
es
Y
es
Y
es
Replace
U800
Check Mic
Bias line on
U701 for DC
Voltage
Voltage =
5.0V ?
Check signal on
R774 while still
applying audio
signal to radio
Check signal
on
CODEC_CLK
Data
present?
Replace
U701
1
Replace
U701
Y
es
2
2
Clock
present?
Replace
U701
Check signal on
CODEC_FSYNC
Synchronous
pulses
present?
Replace
U701