Motorola ASTRO XTS 5000 Detailed Service Manual page 120

Troubleshooting Charts: VOCON RX Audio (for kit NNTN5567)
5.13 VOCON RX Audio (for kit NNTN5567)—Page 1
Bad SINAD
Bad 20 dB
Quieting
No Recovered
Audio
Check speaker
integrity
Speaker OK?
Yes
Connect an
RLN4460 test box
(or equivalent) to
the radio side
connector via a
programming
cable
Inject Standard
Input into antenna
connector
Audio
present?
No
1
6881094C31-E
No
Replace Speaker
A standard input is an RF
signal at -47 dBm with a 1
kHz tone modulated at 3
kHz for a 25 kHz channel
Check distortion
Yes
of signal at R597
and R598
1
Check RX SAP
port signal
integrity as per
chapter 6
All signals
Yes
present?
No
Replace U401
No
THD < 2 %
Yes
Check contacts at
M102
5-29
Replace U501
Replace U501
November 16, 2006