Nokia NPC-1 Series Troubleshooting Instructions page 24

NPC-1
Troubleshooting Instructions
Check input level
at diplexer (Z907)
input.
Y
Check input level at
duplex filter. You can
also check level at
diplexer output
Y
Check input level at
LNA input (J800).
Y
Check RF level at
RX800 band filter
input.
Y
Check RF level at
MIX1_A input.
Y
Page 24
N
Change EXT RF
Connector
N
Change diplexer Z906
N
Change duplex filter
(Z906)
N
Change SAFARI
(N801)
N
Change SAFARI
(N801)
ãNokia Corporation
PAMS Technical Documentation
Note!
Check all soldering and components
in antenna circuit before changing
Note!
Check all soldering and discrete
components of frontend.
N
Note!
Check all solderings and discrete
copmponents around SAFARI
before changing
Note!
From the begin to MIX_1A input
you should see strong RF signal
level at 881.49 MHz. Exact level
is difficult to define here because
variable impedances in RX path.
Also used probe type affects to
the results.
Issue 1 10/01