Nokia 6670 服务手册

RH-51/52, RH-67/68

Company Confidential

6(b) - RF Troubleshooting 

Nokia Customer Care

Page 52

      ©

 2004 Nokia Corporation.

Issue 3 09/2004

Connection to

JBT9 OK ?

BER <=

0.1%?

Reference clock

from HELCO not

supplied

Is BC02 Xtal_in

(1) frequency = 26MHz

(2) voltage swing = about

1000mV

N

Y

Y

N

Y

N

Bluetooth fault

Check component

soldering in RF path

(Z191, Z192, C191,

C192, L191, L192)

Replace balun

and filter

(Z191, Z192)

Bluetooth ok

Is BC02 VDD_ANA

=  1.8V at C201

Replace BC02

(D190)

N

Y

1)

2)

3)

Is BC02 VREG_IN =

2.8V at C203?

Y

N

Replace

inverter (D191)

Replace BC02

(D190)

Vflash1 from

UEME not

supplied

1)

2)