Tdma800Rx - Nokia NSW-6 Series Disassembly & Troubleshooting Instructions

PAMS Technical Documentation
Check input of
EROTUS IF ampli–
fier at R744
P: ≅ –55dBm
Check LIMIN1
level at C768
Check LIMOUT1
output R788
: >300 mVpp
Check COBBA_D IF2A
input at R774
AMPS TX continued above

TDMA800RX

Diagram on the next page.
Issue 1 12/99
N
Change Z741
Y
N
Check comp. R764
&C769
Y
N
Change EROTUS
Y
N
Check comp. R788 ,
R789, L750, C780 and
R774
E Nokia Mobile Phones Ltd.
Disassembly & Troubleshooting
Note!
Check all components around filter
Note !
Check voltages around EROTUS
Note !
Inductor L750 is not reciprocal, i.e
180 deg rotation will hurt SINAD! So,
check placement from OK phone, or
try to rotate.
NSW-6
Page 27