Motorola MOTOTRBO XPR 7550e - Page 46

5-16 Troubleshooting Charts
Figure 5-16.Troubleshooting Flow Chart for Transmitter
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
No
START
END
NO POWER
Check Power
Control
Is current
drain >1.4A?
Is power
OK?
Is Tx Vctrl =
1.8V?
Check CMOS Switch
troubleshooting chart
at the next page
Check Harmonic Filter
Inspect / Repair Tx
Output Network
Is Tx INJ
>4dBm?
Is Pre-Driver
current
~60mA?
Is Driver
Biased
correctly?
Inspect Final PA
Network
No
Check FGU
Section
Check Q0703
Check Tx_Vctrl
No