User Guide

RH-17
Troubleshooting — RF CCS Technical Documentation
Page 44 Nokia Corporation Confidential Issue 1 04/2003
Robin (N601)out=Balun (T604) in TP2a and TP2b Nominal loss
through Balun =
1 dB, but it will
appear as 3-4 dB
gain due to
impedance dif-
ference. On
Robin output you
may see ampli-
tude imbalance
between 2 sides
of probing point
2 due to imped-
ance differences.
N601 (ensure VREFRF02 is 1.35v as
in TP17. Check AGC voltages/PDMs
as in Table 1, T604, L604, L603,
C640, C642, C907, N603 (including
check for 3.6v on pin 5), D400
(including AGC voltage check in
Table 1 ) Remember to check the
state of FAST_AGC should be High in
Analog mode TP13.
Balun (T604) out=Tomcat (N603)
in
TP3
TP4
See Table 1. T604, C640, C642, L603, L604(check
that VR2 is 2.8 Vdc @ TP14), N601,
C907, N603 (including check for
3.6v [Vbat TP15] on pin 5 and 2.7v
[enable TP16] on pin 4)
Tomcat (N603) out= TX SAW filter
(Z604) in
TP5 Gain=12-16 dB
through Tomcat
N603 (also ensure 3.6v on pin 5 and
PD_CELL high, N601, C649, C639,
Z604, N801 (Vbat)
TX SAW filter (Z604) out= cell PA
(N801) in
TP6 Loss=2-3 dB
through SAW fil-
ter
Z604, N603, C610, N801 (Vbat)
Cell PA (N801) out= cell isolator
(Z802) in
TP7, Probing
here not recom-
mend
unless
necessary, best
to measure on
RF connector.
PA has variable
gain, check Iref
Cel at C811.
N801 (including: check 3.6v on Vbat
TP18), Z802, R805, R801, L801,
D400 (including AGC voltage check
in Table 1), N601 (check PA_AGC as
in Table 1, also check IREF CEL at PA
TP19) PA_BOOST not used in
Haukka. If gain is insufficient at PA,
press on N801 and check if RF out-
put increases at RF connector.
If yes, ground connection is incom-
plete.
Cell isolator (Z802) out= cell
duplexer (Z803) in
TP8 Probing
here not recom-
mend unless
necessary, best
to measure on
RF connector.
Loss=0.6 dB
through isolator.
Best to measure
on RF connector.
Z802, N801 (Vbat), R805, R801,
Z803
Cell duplexer (Z803) out= RF Con-
nector (X814) in.
TP9 Probing
here not recom-
mend
unless
necessary, best
to measure on
RF connector
Loss=1-3 dB
through duplexer
Z803, L750, N750, X814. If no cable
connected to X814 then additionally
X811.