Nokia 7600 - 2. Getting started; Installing the SIM card and the battery

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-28 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
GSM/WCDMA Antenna Troubleshooting
Test Points
Signal Ref Test point Function Characteristic Note
PURX 100 N101 Pin 44 External reset 1.8V Active Low From UEME
SLEEPX 101 J101 Sleep mode control signal 1.8V Active mode
0V Sleep mode
SLEEPCLK 102 N101 Pin 26 Sleep Clock 32.768KHz digital clock
1.8V
UEMRSTX 103 N101 Pin 49 UEME Reset Vbat
SYSCLK 104 N101 Pin 50 Bluetooth system Clock 26MHz
CBUSCLK 105 N101 Pin 36 Serial control bus clock 1MHz digital clock signal
1.8V
TIKU peripheral control
bus
CBUSDA 106 N101 Pin 35 Serial control bus data bi-
directional
1.8V digital signal bi-directional
CBUSENX 107 N101 Pin 34 CBUS enable signal 1.8V digital signal
MICBI 108 R103 Microphone bias voltage 2.1V
MIC1P 109 C103 Microphone positive ~1.35V dc + signal
MIC!N 110 C104 Microphone negative ~1.35V dc
Internal Mic 111 L12 Microphone out 1V - 2V + signal Depending on microphone
LEDA 112 R106 Anode supply for Infrared Vbat IR Off
~Vbat - 1.6V IR on digital
signal
TXD 113 V100 Pin 3 Infrared Tx data 1.8V digital signal
RXD 114 V100 Pin 4 Infrared Rx data 1.8V digital signal
VOUT 115 C109 Camera supply 2.8V
CAMSWITCH 116 R110 Camera switch 1.8V
FBUSRX 400 J400 Pin 3 Flash programming data
and phone control
2.78V digital signal From FPS-8 / PC to phone
N
o
Yes
N
O WCDMA
Ground
antenna
connection
N
O GSM
ground
antenna
connection
Yes
With multimeter check GSM &
WCDMA antennas make
ground connection with battery
connector ground
OK?
Phone in mechanics
with C (battery) and D
(antenna) covers
removed
GSM & WCDMA
antenna OK
Replace
antenna
module
Antenna
spring
contacts
OK?
Replace
WCDMA
antenna
Replace
faulty
contacts