Fig 39 Fault Finding Chart - Nokia RH-13 Series Troubleshooting Manual

RH-13
Troubleshooting
AMPS, PL2, CH383
Visual check of TX
block
- PA and up converter
-TX SAW
- Duplex filter
- Passive components
*)Check LO-signal
(1015.53MHz)
@L979&L980
and TX VHF (358.08
MHz)@N811
Check supply voltages:
VR2,VBATTRF,
VR5, IPA1,BANDSEL,
TX_ENABLE
TX_GAIN_CONTROL
Check TXi/q signals
Test points J810...J811
**)Check TX IF power
(179.04 MHz) @
C931&C932
Input: -17 dBm
+3 /-6 dB
***)Check TX RF
(836.49 MHz) output
power @ U/C output
RF: -5 dBm +/- 6dB
Page 56
Figure 39: Fault finding chart
OK
NOK
troubleshooting
OK
NOK
Check UEM and UPP
OK
NOK
OK
NOK
Change SAFARI
OK
NOK
1) Check C904
OK
ãNokia Corporation
CCS Technical Documentation
Start synth
(Baseband)
Check UEM
(Baseband)
N801
2) Change
U/C N902
Issue 1 11/02