Motorola MOTOTRBO XPR 7550e - Page 59

Troubleshooting Charts 5-29
Figure 5-29.Troubleshooting Flow Chart for GOB 2 (Sheet 1 of 2)
Yes
Is OB able to
power up?
Check power supply:
1) SWB+
2) OPT_ENA = 1.8V
Logic
3) 3.3V LDO O/P
4) VDDIO (1.8V)
LDO O/P
No
Are all
supplies
available?
Yes
Replace
failed
component(s)
No
No
Power ON
Option Board
Check clock
Y5101=12MHz
Is 12MHz Clock
Avai lable?
Is OB able
to flash?
Yes
No
Inspect
Microcontroller
(U5103) for process
issue
Inspect JTAG
connector (J5000)
and its path
Is U5103
Ok?
Yes
Are JTAG
connector &
lines ok?
Rework the
failed part
No
No
End
OB programming
successful
Programming jig
or tool issue
Yes
Yes