Motorola APX 7000 Detailed Service Manual

Troubleshooting Charts: VOCON TX Audio Error 5-29
VOCON TX Audio Error – Side Mic Failure
Backside Side Mic is
Inoperative
Isolate Problem,
Replace Backside
Mic
Is Backside Mic
Functional
Replace Backside
Mic
Replace RF Board
Is Backside Mic
Functional
Measure Mic Bias
at R6403
Replace RF Board
4.5 < V <4.9?
Inspect Mic Bias
Circuit U6402 and
Supporting
Circuitry
Are Parts Solder
Connections and
Placement Correct
Replace or Repair
Parts
Replace VoCon
Board
Inspect SSI Audio
Data using
Oscilloscope at
R3016
Is SSI Audio
Data Present
Replace VoCon
Board
View SSI Signals
at R1017, R1007,
and R1008 Using
an Oscilloscope
Is SSI RF Data
Present
Replace VoCon
Board
Examine
Connector J1001
Is Connector
Damaged or
Soldered
Improperly
Repair or Replace
Connector
Yes
No
Yes
No
Yes
No
No
Yes
No
Yes
No
Yes
No
Yes
Synopsis
This failure specifically refers to the
backside microphone but this flow chart
can be used to diagnose front side, and
external mics. All mics mentioned above
have similar paths and have very limited
differences. Please refer to schematic
and theory of operation section for
differences.

Motorola APX 7000 Specifications

General

Digital Technology	P25 Phase 1 and Phase 2
Emergency Button	Yes
Frequency Range	136-174 MHz (VHF), 380-470 MHz (UHF Range 1), 450-520 MHz (UHF Range 2), 764-870 MHz (700/800 MHz)
Display	Color LCD
Encryption	AES, DES
Water Resistance	IP67
GPS	Yes
Bluetooth	Yes
Operating Temperature	-30°C to +60°C
Weight	391 g (with standard battery)