Motorola MOTOTRBO XPR 7550e - Page 56

5-26 Troubleshooting Charts
Figure 5-26.Troubleshooting Flow Chart for Bluetooth/WiFi (Sheet 2 of 2)
CLK_32KHZ_8777
(R8115)=32.768kHz?
No
Yes
Yes
Diplexer loss
(FL8000) < 2.5dB?
No
Change diplexer
(FL8000)
Inspect power
management IC (U3000)
Yes
RF switch loss
(U8336_3) < 1dB?
BT: VCTL1=3.3V, VCTL2=0V
WIFI: VCTL1=0V, VCTL2=3.3V
No
Change RF switch
(U8336_3)
Yes
CLK_26MHZ_8777
(E8300_3)=26MHz?
V_SUP_TXCO
(L8301_3)=1.8V?
NoNo
Check SW3_1.8V from
power management IC
(U3000)
Yes
Change 26MHZ TCXO
(Y8302_3)
Inspect Marvell IC
(U8300_3)
A