Nokia 5510 - Call Register, Tones, and Settings

PAMS Technical Documentation RF Troubleshooting
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Oscilloscope
Turn the phone ON
and measure power
supply fo r the VCTCX
( G502 Vcc) 2,7 V
Oscilloscope
Measure the output
signal of the VCTCXO
( G502 out ) approx.
1.2 Vpp, 26 MHz
Oscilloscope
13 MHz buffer input
approx. 0.4 Vpp
(C559)
Oscilloscope
13 MHz buffer output
approx. 0,6Vpp (L511)
Check CCONT, phone
is ’dead’
VCTCXO is ’dead’ Check HAGAR,
divider by 2 in HAGAR
not in function ( not
enabled)
Buffer transistor not in
function ( V500 )
Reason is something
else ( Software,
battery, etc. )
Yes Yes
Yes
Ye
s
No No No No