Nokia NPC-1 Series Troubleshooting Instructions page 34

NPC-1
Troubleshooting Instructions
Fault finding chart for UHF SYNTHESIZER
OK
Change
VCO
3.
No
2. No
Is frequency locked?
2009.1 - 2059.02
OK
Check
loopfilter
components
and balun
Page 34
Figure 18: Fault tree: UHF Synthesizer
START HERE!
Yes
MHz
1.
OK
No
Check VCO
No
operatig Check resistor
voltage:
OK
2.78 V
ãNokia Corporation
PAMS Technical Documentation
Change
4. No
No
Is EVM OK?
YES
OK
No
1
Check
loopfilter
components
R774
SAFARI
OK!
Issue 1 10/01