Motorola APX 2000 Detailed Service Manual

5-14 Troubleshooting Charts: Power-Up Failure
Power-Up Failure – Low V_EXT_1.85 Voltage
Low V_ENT_1.85 Voltage
Measure Radio
Current
Is standy
current > 15mA
above avg?
Board has a short,
replace board
Measure
V_SW_3.6
Voltage at R6510
No
Yes
Voltage =
V_SW_3.6
Proceed to
Incorrect
V_SW_3.6
Voltage
Measure Voltage
R6431 on V_5.0A
Side
No
Yes
4.8 < V < 5.2
Measure Voltage
at R6431 on
BGAP_COMP
side
Yes
Proceed to Low
LD08 V_5.0A
Voltage Flow
Chart
No
2.2 < V < 2.7?
Measure Voltage
at R6420
Inspect U6508 and
All Supporting
Circuitry
Yes
Yes
No
Inspect and repair
U6409 and
Replace Main
Board
No
Are Parts Solder
Connections &
Placement Correct
Replace or repair
Parts
Replace Main Board
No
2.2 < V < 2.7?
Supporting
Circuitry

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)