Motorola APX 2000 Detailed Service Manual

5-28 Troubleshooting Charts: RX Audio Error
5.11 RX Audio Error
External Audio
No audio out of
external speaker
Measure speaker
lines on GCAI
Connector using
Oscilloscope
Probe PREAMP_NEG
C6419 and PREAMP_POS
C6418
Connectors
good?
Check connectors from
Main Board J2302 to
GCAI flex
Replace board or flex
with bad connector
No
View SSI signals at
R6606, R6108 with
scope
Audio Signal
Present?
Audio Signal
Present?
Replace External
Speaker
Probe Audio signal at
SPKR+ and SPKR- test
points on main board
Yes
No
No
Yes
Is data
present?
MAKO might be damaged.
Change MAKO
Is data
present?
No
No
Yes
Replace Main Board
Check CODEC
Verify ESD protection
diode is good by
measure voltage drop
of diode at GCAI SPKR+
and SPKR- test point
Yes
Voltage drop
=0.7V?
Replace Main Chassis
Yes
Yes
Replace GCAI flex
No

Motorola APX 2000 Specifications

General

IP Rating	IP67
Operating Temperature	-30°C to +60°C
GPS	Optional
Bluetooth	No
Frequency Range	700/800 MHz
Power Output	1-5 W (VHF), 1-3 W (700/800 MHz)
Channels	Up to 1, 000
Battery Life	Up to 10 hours (digital)
Digital Protocol	APCO P25
Frequency	VHF: 136-174 MHz, UHF: 380-470 MHz, 700/800 MHz: 764-870 MHz
Power	1-3W (700/800 MHz), 1-5W (VHF)