Motorola APX 7000 Detailed Service Manual

2-2 Radio Power: DC Power Routing – Transceiver Board
Figure 2-1. DC Power Distribution
B+ from the battery is electrically switched to most of the radio, rather than routed through the
On/Off/volume control knob, S2. The electrical switching of B+ supports a keep-alive mode. Under
software control, even when the On/Off/volume control knob has been turned to the Off position,
power remains on until the MCU completes its power-down, at which time the radio is physically
powered down.
2.2 DC Power Routing – Transceiver Board
NOTE: Refer to Table 8-1, “Transceiver Schematics and Board Overlays,” on page 8-1 for a listing of
schematics showing the transceiver board DC power routing components.
Connector M101, the B-plus assembly, connects the battery to the transceiver board. Component
E200 forms a power-line filter for signal DC_ RAW_B+, which supplies battery voltage to the
transmitter section. Fuse F200 and filter C202, L200, C203 supply fused B plus to the VOCON
board.
In turn, the VOCON board supplies VSW1 regulated 3.6 Vdc, 2.775 Vdc, and 1.875 Vdc. The
3.6 Vdc supplies regulator U201 and controls switch Q201 which supplies fuse B+ to regulator U200.
The 2.775 Vdc supplies regulator U202, Trident IC U702, 16.8 MHz crystal circuit and Logic
Expander IC U703. The 1.875 sets the logic level for the SPI and SSI data.
The transceiver board has four regulators 5 Vdc (U200), 3 Vdc (U201), 1.8 Vdc (U202) and 1.5 Vdc
(U203). The 5 volt regulator supplies the FGU section, transmitter ALC and receiver back end. The
3 volt regulator supplies dc for the receiver front ends, mixer, receiver back end and GPS.
The 1.8 volt regulator supplies dc for the receiver front end and mixer. The 1.5 volt regulator supplies
dc for the buffers in the FGU section.
Fuse
5Vdc
3Vdc
Battery
7.5 Volts
(Nominal)
RF Board VOCON Board
1.8Vdc
1.5Vdc
BATT
M101
RAW B+
3Vdc
1.8 Volts
1.5Volts
P101
FB+
3.6Vdc
2.775Vdc
1.875Vdc
PMOS
Switch
SW_B+
MAKO
SW2
LD02
LDO3
LD04
LD06
LD07
LD09
LDO10
VBUS1
VBUS2
LD08
External SW
External SW
External SW
1.875Vdc
1.2Vdc
2.775Vdc
2.775Vdc
2.8Vdc
3.0Vdc
3.3Vdc
5Vdc
5Vdc
5.4Vdc
1.4Vdc
1.875Vdc
External
LDO
3.6Vdc
2.23Vdc
5.4Vdc
5.4Vdc
SW_B+
2.23Vdc
5Vdc
FB+
3.6Vdc
3.6Vdc
3.6Vdc
2.23Vdc
3.6Vdc
External
SW
3.6Vdc
Expansion Board
SW_B+
SW_B+
1.875Vdc
3.6Vdc
2.8Vdc
Audio PA
3Vdc
1.2Vdc*
2.8Vdc
1.8Vdc
3Vdc
1.2Vdc
2.8Vdc
1.8Vdc
5Vdc
Note: ) Not applicable for TI Chipset
*

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)