Low Or No Rx Injection Signal (700-800 Mhz); Figure 5-41. Low Or No Rx Injection Signal (700-800 Mhz) - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

Troubleshooting Charts: Flowcharts
5.6.39 Low or No RX Injection Signal (700–800 MHz)
START
Low or No RX
Injection Signal
Approx.
5V on
Q6762-C?
Approx.
4.5V (–1V) on
Q6763-D?
Check RF path
from RX VCO
6881096C74-B
Check Q6762 and
No
DC Bias Circuitry;
Yes
No
Ohms across
Yes
Figure 5-41. Low or No RX Injection Signal (700–800 MHz)
replace if
necessary
62
No
R6801?
Yes
Replace
Q6763
Replace R6801
and Q6763
MAEPF-27810-O
May 25, 2005
5-53