Motorola APX 2000 Detailed Service Manual

Troubleshooting Charts: Volume/Channel Error 5-23
5.6 Volume/Channel Error
Volume / Channel Error
Is voltage level
1.85V when
rotating switch?
Refer troubleshooting
guide 5.4.4
Yes
No
Replace Keypad flex
No
Observe if any noise
on waveform
Yes
Verify all connectors from
J2302 to frontkit flex are good.
Remove SH13
Probe TP2111 and
TP2110 with scope
Is noise
present?
Check U21000,
U21001, U21002 and
U21003 circuitry.
Verify if VCC_1.85 present
on keypad at TP2005
Is 1.85V
present?
Replace frontkit flex
No
Is V_Ext_1.85
present at C2116?
Yes
No
Yes

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)