Motorola Astro XTL 1500 - Figure 5-23. Low or no RX Injection Signal (380-470 Mhz and 450-520 Mhz); Low or no RX Injection Signal (380-470 Mhz and 450-520 Mhz)

June 15, 2005 6815854H01-A
5-32 Troubleshooting Charts: Flowcharts
5.6.21 Low or No RX Injection Signal (380–470 MHz and 450–520 MHz)
Figure 5-23. Low or No RX Injection Signal (380–470 MHz and 450–520 MHz)
Approx.
5V on
C5318?
START
Low or No RX
Injection Signal
No
No
Yes
No
Yes
Yes
Approx.
4.5V on
pin 14
of U5303?
5 V
on C5335?
Check RF path
from RX VCO
Check R5324,
R5325, R5326
Check Voltage
Regulator U5301
Check L5299