Nokia NSE-3 SERIES, Service Manual

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NSE–3 System Module UP8T
Original 11/97 3/A3–9
Layout Diagram of UPT8T – Top
(Version 14)
testpoint name condition dc–level ac–level
J102 FBUS_RX power on pulsed DC (0V/2.8V)
J103 MBUS power on pulsed DC (0V/2.8V)
J107 LGND 0V
J110 VPP flash programming nominal 5V (5V flash) or 3.0V
(3V flash)
J111 WDDISX power on reset state 0V, normal state 2.8V
J221 5V flash programming nominal 5.0V (5V flash) or 3.0V
(3V flash)
J222 DSPXF power on pulse active 0V, non–active 2.8V
J229 MAD selftest test mode set externally
J230 MAD selftest test mode set externally
J231 VSIM SIM power on nominal 2.8V (3V SIM card) or
5.0V (5V SIM card)
J232 VB (battery voltage in
baseband)
battery connected nominal 3.6V (min 3.0, max 4.2)
J233 RFCLK active state typ. 1.0Vpp (min
0.5Vpp, max
2.0Vpp)
J234 VSRM power on nominal 5.5V (min 5V, max 6V) CCONT switch
mode regulator
ripple voltage
J236 RAMSELX active state pulse active 0V, non–active 2.8V
J250 GND 0V
J252 COBBARSTX power on reset state 0V, normal state 2.8V
J253 COBBAWRX active state pulse active 0V, non–active 2.8V
J254 COBBARDX active state pulse active 0V, non–active 2.8V
J255 COBBACLK active state pulsed DC (0V/2.8V)
testpoint name condition dc–level ac–level
J502 Power control op.amp
output voltage to N550
( Vpd, pin )
power level depended
pulsed DC
J506 RFC ( 13 MHz sine-
wave )
0 V typ. 1.0 Vpp min
0.5/max 2.0 Vpp
J510 VRX ( regulated supply
for RX )
2.8 V min 2.7 / max 2.85 V,
pulsed
J514 VTX ( regulated supply
for TX )
2.8 V min 2.7 / max 2.85 V,
pulsed
J516 VSYN_1 ( regulated
supply for VCOs)
2.8 V min 2.7 / max 2.85 V
J518 VREF_2 ( ref. voltage
for N500 )
1.5 V +/– 1.5%
J520 AFC ( autom. freq. cntrl
)
0 – 2.3 V, typ. 1.15 V ( room
temp. )
J522 VXO ( regulated supply
for VCTCXO )
2.8 V min 2.7 / max 2.85 V
J530
& J532
71 MHz IF input to
N620
–95 dBm @ X540
(ext. RF connector )
typ. ca. 1.2 V pulsed typ 100 – 140
uVpp balanced
voltage at 71
MHz
J540 13 MHz output from
N620 to Z620
–95 dBm @ X540
(ext. RF connector )
RXC at level of full
calibrated gain
typ. ca. 1.5 V pulsed typ. ca. 700
uVrms
J550 &
J552
116 MHz TX IF to N500 typ. ca. 1.1 – 1.2 V pulsed typ. ca. 100
mVrms each
J562 RXC ( receive gain
control voltage )
RX gain setting depended control range is 0.5 – 1.45 V,
,pulsed.
typ. 1.3–1.4 V for calibrated
maximum gain