Motorola MOTOTRBO XPR 7550e - Page 44

5-14 Troubleshooting Charts
Figure 5-14.Troubleshooting Flow Chart for Receiver (Sheet 2 of 3)
A
Inject RF at Balun input,
C0490
Good SINAD ?
No
Yes
Replace Balun T0490 Replace Rodinia IC U0001
Inject RF at Post-Filter,
C0441
Good SINAD ?
No
Check passive components
on post-filter
Inject RF at LNA input,
C0431
Yes
No
Check LNA gain
Good SINAD ?
B
Yes