User Guide

PAMS Technical Documentation Rf Troubleshooting
NPE-3
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3//%ORFNGLDJUDP
64/65
NDIV
ADIV
ϕ
charge
pump
RDIV
CTRL
SDATA
SCLK
SLE
1/4
1/2
2
OSC_IN
OUT_CP
2
2
2
2
1/2
1/4
2
2
44
44
loop
filter
VCO
AFC
26MHz
Last edit 13:45 07-02-00
Drawing12
VDIG
VPRE
VCP/GND_CP
2
VLO
Reset
INP_LO/INM_LO
VBB
RFC
VXO
1/2
TOUT
VSYN_1
VSYN_2
AFC
HAGARRESET
SLE
SCLK
SDATA
VCP
VF_RX
3dB
2
Oscilloscope
Turn the phone ON
and measure power
supply fo r the VCTCX
( G602 Vcc) 2,7 V
Oscilloscope
Measure the output
signal of the VCTCXO
( G602 out ) approx.
o,8 Vpp, 26 MHz
Oscilloscope
13 MHz buffer input
approx. 0,3 Vpp
Oscilloscope
13 MHz buffer output
approx. 0,4 Vpp
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 ( V600 )
Reason is something
else ( Software,
battery, etc. )
Yes Yes
Yes
Yes
No No No No