Motorola Mototrbo - 3.0 MAP USB (Device Mode) Troubleshooting Chart

MAP USB (Device Mode) Troubleshooting Chart 1-3
3.0 MAP USB (Device Mode) Troubleshooting Chart
After connecting
USB cable to host is
FT_MAP_VBUS &
U1002 pin 5 @5V?
Yes
No
No
Check to make sure
MAP Adaptor providing
good contact and all
pins aligned properly
MAP USB
OK
Yes
PC or Host does not
recognize radio through
MAP USB port
Is FT_MAP_D- test
point logic Low,
FT_MAP_D+ logic high
and USB working?
With radio
turnedOff is either
FT_MAP_VBUS,
FT_MAP_D-
or FT_MAP_D+
shorted to
GND?
Check E4100 &
VR4110
No
If U1002 Pin1 Logic
High?
Check Q1000,
U1002 & U1001
No
Yes
Check FL4000,
U1003 & U1001
Check
VR4104,VR4111
Yes