Motorola ASTRO Digital XTL 5000

May 25, 2005 6881096C74-B
5-36 Troubleshooting Charts: Flowcharts
5.6.22 Low or No TX Injection Signal (380–470 MHz and 450–520 MHz)
Figure 5-26. 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