Motorola MOTOTRBO XPR 7550e - Page 47

Troubleshooting Charts 5-17
Figure 5-17.Troubleshooting Flow Chart for Transmitter(CMOS Section)
No
Yes
Yes
Yes
Yes
END
Check Controller
Section
Check Rodinia for
voltage = 1.8V
Is power
OK?
Follow troubleshooting
flow chart in the previous
page
No
No
No
Is there
TX_ANT_EN
voltage = 1.8V?
Check U0800
PIN10 for
3.6V
Check U0800 connectivity
during Tx mode between
pin RF3 to RF1
Replace U0800
Yes
No
START
NO POWER
Is the CMOS
switch turn
ON?