Motorola Astro XTL 1500 - Figure 5-24. Low or no TX Injection Signal (380-470 Mhz and 450-520 Mhz); Low or no TX Injection Signal (380-470 Mhz and 450-520 Mhz)

6815854H01-A June 15, 2005
Troubleshooting Charts: Flowcharts 5-33
5.6.22 Low or No TX Injection Signal (380–470 MHz and 450–520 MHz)
Figure 5-24. Low or No TX Injection Signal (380–470 MHz and 450–520 MHz)
Approx.
3.4 V on
Q5828-C?
START
Low or No TX
Injection Signal
No
Yes
Check RF path
from TX VCO
Approx.
6.5 V on
Q5501-C?
No
Yes
Check Q5501 and
DC Bias Circuitry;
replace if
necessary
Approx.
3.7 V on
Q5829-C?
No
Yes
Check Q5829 and
DC Bias Circuitry;
replace if
necessary
Check Q5828 and
DC Bias Circuitry;
replace if
necessary