Motorola APX 3000 Detailed Service Manual page 136

5-46
Bluetooth Failure – Pairing Issue (Page 3)
Does the BT ICON
bold with a circle on
the debugging fixture
Were any LCD error
messages displayed?
Check the Battery contact,
Flex connection.
Resolved
3
Pairing was successful. If
Yes
there were no audio tones
during pairing, they may
have been disabled in the
LCD ?
No
Yes
4
No
8
Check the SW
compatibility between
radio and Accessory.
8
Will reload compatible
Yes
SW or test with a
different headset will
successful pair with the
radio?
No
Using Oscilloscope, verfiy
the NFC IC's Tx and Rx
signal on the mainboard
from Fig 3-37. Verify
whether there is a signal
coming out from the NFC
Flex's Coil. Verify the
power source is availale
to supply to the NFC IC.
Were measured
signals as expected?
Yes
New issue, reflash the BT
SW using an SREC file and
flashzap. If issue still
persists, change the main
board
Troubleshooting Charts: Bluetooth Failure – Pairing Issue
codeplug.
Yes
Was audio heard
Resolved
from headset?
No
6
7
Using Oscilloscope, verfiy
the Bluetooth signals are
within the expected
voltages and timings by
measuring the test points
from table 6-6 and using
the waveforms in section
6.17 and 6.15 to verify
the expected signals.
Yes
Were measrued
signals as expected?
Yes
New issue, reflash the BT
SW using an SREC file and
flashzap. If issue still
persists, change the main
board
Replace the components
that cause unexpected
No
signals.
Replace the NFC IC U2403
if it causes unexpected
signals.
Replace the components
that cause unexpected
No
signals.
Replace the Potential ICs
from OMAP > CPLD >
NL5500 > AVR if it causes
unexpected signals.