Motorola APX 7500 - Page 128

September 9, 2011 68009482001
7-12 Troubleshooting Charts and Error Codes Troubleshooting Charts
Figure 7-10. USB Connectivity - B
A
Yes
No
B
Yes
No
Yes
No
Is the USB
connection working
properly now?
Is the USB
connection working
properly now?
The PC has
properly
recognized the
USB connection to
the Consolette
Check or replace the
flex cable
(#8475212B01)
between the
Mainboard
(PPLN1689A) and
the High Speed
Board (PPLN7786A)
Try another USB
port or use another
device to verify
this port.
Is a USB
Hub in place between
the PC and the
Consolette?
Replace or remove
Hub and connect
PC directly to
Consolette
B
No
No
Yes
Yes
Check or replace
High Speed board
(PPLN7786A) and
repeat voltage
measurement test
Does this
voltage measure
approximately
3.2V?
Does this
voltage measure
approximately
3.2V?
The OMAP
processor is
recognizing the
USB connection.
Double check all
connections,
cables and PC
drivers
Repair or replace
Mainboard
(PPLN1689A) as
necessary
Stop
On the Mainboard,
check DC voltage
from FL1500 pin1
to ground when
the USB cable is
plugged into the
PC and Consolette
(powered ON)