Figure 4-9. Pa Test Adapter, 40 Watt Power Amplifier; Table 4-19. Dc Voltages And Input Power Chart - Motorola ASTRO Digital Spectra Plus Detailed Service Manual
Uhf & vhf 800 mhz mobile radios
Hide thumbs
Also See for ASTRO Digital Spectra Plus:
- Service manual (426 pages) ,
- User manual (174 pages) ,
- Instruction manual (114 pages)
Table of Contents
Advertisement
4-58
8. If no failure is located from the previous checks, troubleshoot the power control circuitry.
Test
Transmit
Receive
a. Set initially to zero. Increase value until power equals 46 Watts or 10.0 V maximum.
Do NOT exceed 10.0 V.
A+ TO COMMAND BOARD
CURRENT SENSE +
CONTROL VOLTAGE LIMIT
CONTROL VOLTAGE DRIVE
September 5, 2008
Table 4-19. DC Voltages and Input Power Chart
Keyed 9.4 V
9.4
0
2
1
3
K9.4
Figure 4-9. PA Test Adapter, 40 Watt Power Amplifier
Troubleshooting Procedures: Power Amplifier Procedures
CONTROL
9.6 V
VOLTAGE
DRIVE
a
9.6
See note
9.6
0
4
6
8
10
7
11
5
9
POWER IN
A+
(mW)
(V)
30
13.0
0
13.0
A+ TO COMMAND BOARD
CURRENT SENSE -
12
FEMALE RECEPTACLE
CONNECTOR W 100 MIL
SPACING MATES TO P853
REGULATED 9.6V
V DETECT
TEMP SENSE
6881076C25-E
Advertisement
Table of Contents
Troubleshooting
