Motorola APX 7500 Detailed Service Manual page 128

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