Motorola Astro XTL 1500 - Figure 5-39. Low or no RX Injection Signal (700-800 Mhz); Low or no RX Injection Signal (700-800 Mhz)

June 15, 2005 6815854H01-A
5-50 Troubleshooting Charts: Flowcharts
5.6.39 Low or No RX Injection Signal (700–800 MHz)
Figure 5-39. Low or No RX Injection Signal (700–800 MHz)
MAEPF-27810-O
Approx.
5V on
Q6762-C?
START
Low or No RX
Injection Signal
No
No
Yes
No
Yes
Yes
Approx.
4.5V (–1V) on
Q6763-D?
62
Ohms across
R6801?
Check RF path
from RX VCO
Replace
Q6763
Check Q6762 and
DC Bias Circuitry;
replace if
necessary
Replace R6801
and Q6763