Motorola MOTOTRBO XPR 7550e - Troubleshooting Flow Chart for Controller (Sheet 2 of 5)

Troubleshooting Charts 5-9
Figure 5-9.Troubleshooting Flow Chart for Controller (Sheet 2 of 5)
Check Microprocessor/
Memory Section
Load Kernel
OK?
Ensure No Process
Issue
FlashZap
Flashing OK?
Microprocessor/ Memory
Section OK!
BOOT Pins
Voltage Level
Correct?
Change Microprocessor IC
(U1000)
No
No
No
NoNo
Check BOOT Pins
Resistor Value
Yes
Yes
YesYes
Yes
USB Connection
OK?
Check USB/ GPIO Switch
(U3330)
Change mDDR (U2000) and/
or NAND Flash (U2100)
Check
19.2 MHz at
U1081(Pin 4)
Ok?
Check 38.4 MHz clock at U0001
CLK_OUT (C0034, E0021) and FGU
Section