Rf Testpoints (Reference Pictures At The Back Of The Binder) - Nokia NSB-6 Series Disassembly & Troubleshooting Instructions

PAMS Technical Documentation
RF Testpoints
(reference pictures at the back of the binder after schematics diagrams)
RX
DC levels (oscilloscope)
Point Signal
RX1 RXIP and RXQP
RX2 RXIP and RXQP
RX3 EGSM LNA ctrl
RX4 DCS LNA ctrl
RX5 Rxref
RX6 VREF_2
RX7 Vlna
RX8 Vrxrf
RX9 Vsynte
RF levels (spectrum analyzer)
Point Signal
RX10 925 960 MHz
RX11 1930 1990 MHz
RX12 925 960 MHz
RX13 1930 1990 MHz
TX
DC levels
Point Signal
TX1 VPCTRL
_P
TX19
VPCTRL_G
TX2 Vdd1
TX18 TXVGSM
TX16 TXVDCS
TX6 TXVdet
TX7 DET0
TX8 TXQ
TX9 TXI
TX10 TXC
RF levels
Point Signal
TX12 RX and TX
TX14 PA output GSM
TX20 PA output DCS
Issue 1 06/2000
Disassembly & Troubleshooting Instructions
Component Comment
R530 I/Q signals (67 kHz) from Hagar to COB-
BA.
C522 and C523 Same that RX1 but before AGC state
C611 / V907 ~2.8 V burst controls LNA ON/OFF
C642 / V905
C534 / R533 DC 1.2 V from COBBA to Hagar
C564 / R563 DC 1.5 V from CCONT to Hagar
C562 DC 2.8 V from CCONT to Hagar
C557 DC 2.8 V from CCONT to Hagar
C561 DC 2.8 V from CCONT to Hagar
Comp. Comment
Z600 Second saw–filter EGSM output to baluuns, (–44dBm)
(check level from reference engine)
Z600 Second saw–filter DCS output to baluuns, (–41dBm)
(check level from reference engine)
Z620 First saw–filter EGSM output to LNA, (–55dBm)
(check level from reference engine)
Z620 First saw–filter DCS output to LNA, (–58dBm)
(check level from reference engine)
Component Comment
C714 / R744 PA Power control DCS
C711 / R745 PA Power control GSM
C755 / L755 Battery voltage to PA Vbatt 3.3
C746 ~2.5 V pulse controls antenna switch
C747
C731 / R730 Operating voltage to TX detector 2.8 V burst
R764 / R763 and detected TX level to HAGAR
C540 TX Q signals from baseband to Hagar (+ –
67 kHz, DC level 1.2 V, swing level 1.32 V)
C541 TX I signals from baseband to Hagar (+ –
67 kHz, DC level 1.2 V, swing level 1.32 V)
R792 / C792 TX power control voltage from baseband to
Hagar 0 2.2 V burst
Component Comment
Z670 / ant. Final TX frequency and level,
(32,5 dBm, EGSM / lev 5)
(29,5 dBm, EGSM / lev 0)
(check level from reference engine)
C758 PA output signal
C743 (check level from reference engine)
E Nokia Mobile Phones Ltd.
NSB–6
4.8 V
*)
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