(No.RA070<Rev.001>)1-63
5.3
Failure diagnosis of the Bluetooth section
Overview
When the Bluetooth function does not operate, use this flowchart to determine the problem.
BT/GPS IC (IC351)
When the BT/GPS IC is problematic, it is necessary to replace the printed circuit board by the Service Main unit in service. Various
ESN/default adjustment values are written on the service unit. Please refer to "5.6 Replacing Main Unit".
DISPLAY
UNIT
MAIN
UNIT
CN353
Sheet metal
CN155
CN151
IC351
IC352
IC353
IC401
L361
X351
X401
MPU/DSP
IC
BT/GPS
IC
TCXO
19.2MHz
32.768kHz
Clock
LC
Filter
Bluetooth
Antenna
Level
conversion
IC
Level
conversion
IC
UART
PCM
PCM
UART
Major parts for a Bluetooth circuit
• Bluetooth antenna (Sheet metal)
• LC filter (L361)
• BT/GPS IC (IC351)
• Level conversion IC (IC352, IC353)
• TCXO 19.2MHz (X401)
• 32.768 kHz clock (X351)
• 32BT Regulator (IC7)
• 18BT Regulator (IC8)
• MPU/DSP IC (IC401)
I can not pair with the Bluetooth (BT) headset.
Is the BT headset charged enough?
Is the BT headset turned on?
Is the BT headset in pairing mode?
Charge the BT headset. Turn on your BT headset and bring it
within one meter.
Try again pair with BT headset.
the PCB. (CN151, CN155, CN353)
To reassembly correctly the BT antenna.
If an antenna is defective, replace the BT internal antenna.
Verify the BT/GPS power
supply.
(32BT) C34: 3.2V
Fail
Fail
No
Verify the antenna matching parts.
Visually check to R359, C353.
Fail
Replace any abnormal parts.
Check the PCB
Check the PCB side A.
Check the Display Unit PCB
Fail
Pass
Pass
[The BT/GPS power supply
line 32BT circuit is faulty]
Verify the parts.
IC7, L8, C33, C34, R9
Replace any abnormal parts.
Pass
Verify the antenna matching parts.
Visually check to L151, L152, L153, R155, L156,
C158.
Fail
Replace any abnormal parts.
Check the Display Unit PCB
Pass
Check the PCB side A.
Yes
side B (a).
Verify the contact of the BT internal antenna with
Содержание NX-3400
Страница 70: ...1 70 No RA070 Rev 001 ESN Label Layout Note Cut a ESN Label at dotted line ESN Label ...
Страница 82: ... No RA070 Rev 001 2 12 2 12 No RA070 Rev 001 MEMO ...
Страница 84: ... MEMO No RA070 Rev 001 2 14 ...
Страница 97: ...MEMO ...
Страница 98: ... No RA070 Rev 001 JKS Printed in Japan JVC KENWOOD Corporation Communications Systems Division ...