Poor Rx Sensitivity Or No Rx Audio (136-174 Mhz)-Part 2 Of 2 - Motorola ASTRO XTL 1500 Detailed Service Manual

Troubleshooting Charts: Flowcharts
5.6.2 Poor RX Sensitivity or No RX Audio (136–174 MHz)—Part 2 of 2
Go to DC
section
Fix or replace
the component
FE problem
Replace U302,
T300, T301.
Check passive
components
Figure 5-4. Poor RX Sensitivity or No RX Audio (136–174 MHz)—Part 2 of 2
6815854H01-A
1
No
Is ABACUS
VCC 3V
?
Installation
No
OK
?
(Std/Pre mode)
Is RF
No
power
(>-20/-31dBm)
?
(Std/Pre mode)
Is RF
power
No
(>-27/-38dBm)
?
Visually ispect
Yes
FE and BE
components
installation
Inject -40dBm
(CW) to RF
Yes
connector. Check
power on
C3297
Check power
Yes
on C3421
(mixer output)
Yes
Check IF
section
5-13
AEPF-27874-O_VHF
June 15, 2005