Motorola MOTOTRBO XPR 7550e - Troubleshooting Flow Chart for Controller (Sheet 4 of 5)

Troubleshooting Charts 5-11
Figure 5-11.Troubleshooting Flow Chart for Controller (Sheet 4 of 5)
Ensure No Process Issue
No Audio Signal at
Power Management IC
output?
Correct SSI Signal from
Microprocessor to Power
Management IC
Change Power Management IC
Check SSI Signal from
Microprocessor and RF IC
Check Connectivity from Power
Management IC to Audio PA. If OK,
Yes
Yes
Yes
No
No
No
No Output Audio at external
speaker (accessory or test box)
Is Audio Amp
(U3170) turn on?
Check functionality of Q3170 and check
setting on PA_MODE and PA_MUTE
Ext SPKR
PA_Mode = High (Turn ON)
PA_MUTE = High (Mute External SPK)
PA_MUTE = Low (Unmute External SPK)
Change Audio Amp (U3170)