Instructions For Rx Troubleshooting - Nokia NSB-1 Series Troubleshooting Instructions

NSB–1/3
Troubleshooting Instructions

Instructions for RX troubleshooting

Use high impedance RF–probe and calibrate your phone with functional phone.
Note! Power level measurement accuracy with RF–probe is
Use WinTesla to set RX continuous mode and RX on.
Apply 1960 MHz
–50dBm signal to
external RF–connector
X451.
N
Check
duplexer(Z401)
(max IL 3dB) output:
P:~53dBm
N
Check filter Z604
(max IL 3.2) output:
P:–40dBm
N
Check C603 and
C604. Check CRFU
pin 18 and 19:
f:487MHz P:–24dBm
Page 12
Check RF–connector
X451. Check input
of duplexer. Replace
if necessary.
N
Check input of Z604
and L611.
P:–37dBm
Change
filter Z604.
Check C623 and
f:1960 MHz
CRFU pin 21:2.7V
pin 23:P:–40dBm
pin 14:2.8V
N
CRFU pin 16:
f:1473MHz
(MID ch) P:+0dBm
Technical Documentation
2 dB.
N
Check C600,R611
Check input of and measure CRFU
C601: pin 5:2.4V
P:–37dBm
Check R612
Check R600 and
and CRFU pin
C666: 2.7V
12:1.2V
Check V600;
b:0.86V.
troublesh.
L610
N
Check CRFU
Goto BB
pin 4:2.8V
troublesh.
(FRAC)
Check C710.
Goto UHF VCO
troublesh.
PAMS
N
Goto BB
Original 06/98