Nokia 5510 Troubleshooting Manual page 48

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RF Troubleshooting
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From WinTesla chose:
Product > Band > EGSM
Testing > RF Controls >
Rx continuous > Ch 60
Spectrum Analyzer
No
VCO output ( G500 out)
3788 MHz
Yes
PLL block functional
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Oscilloscope
Yes
VCTCXO Power Supply
(G502 Vcc)
2,7 V
No
Check CCONT,
Software?? Phone not in
function
Check HAGAR,
wrong writting to HAGAR
(SCLK,SDATA,SLE,
HAGARRESET)
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PAMS Technical Documentation
Oscilloscope
Yes
VCTCXO output
(G502 out) 26 MHz,
approx. 1.2 Vpp
No
VCTCXO is dead
Yes
Oscilloscope
Yes
VCO Power Supply
(G500 Vcc) 2,7 V
No
Check CCONT,
Software?? Phone not
in function
Spectrum Analyzer
VCO output ( G500 out)
Some signal between 3
and 4 GHz
No
VCO is dead
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