User Guide

NHM-10 Company Confidential
BB Troubleshooting CCS Technical Documentation
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BT Fault
R430
Connection
to BT antenna
Connection
to JBT9
Is Vcc ok?
Y
Y
N
N
Y
N
Check Vcc
Pins 52,53,54
BT ok
N
Is
solder
bad
Check
Capacitors
N
N
N
BER
<=
0.1%
Y
Resolder or
replace
module
Check
BT 202
soldering
Y
Check VBAT
L431
Is
Ripple
<= 400
mVpp
Y
Y
Check VREG
Pin 6
Is
VREG
ok?
Check VBAT
L431
Check Vbben
Check R437
Check
SYSCLK
Check
VCTCXO
Buffer section
Does
Vin = 300-600
mVpp & Freq
=26Mhz?
Replace
BT202 Module
Check BER
BT ok
BT Fault
R430
Connection
to BT antenna
Connection
to JBT9
Is Vcc ok?
Y
Y
N
N
Y
N
Check Vcc
Pins 52,53,54
BT ok
N
Is
solder
bad
Check
Capacitors
N
N
N
BER
<=
0.1%
Y
Resolder or
replace
module
Check
BT 202
soldering
Y
Check VBAT
L431
Is
Ripple
<= 400
mVpp
Y
Y
Check VREG
Pin 6
Is
VREG
ok?
Check VBAT
L431
Check Vbben
Check R437
Check
SYSCLK
Check
VCTCXO
Buffer section
Does
Vin = 300-600
mVpp & Freq
=26Mhz?
Replace
BT202 Module
Check BER
BT ok