Nokia NSE-3 SERIES, Service Manual

Page: 202 / 217

NSE–3 System Module UP8T
Original 11/97 3/A3–10
Layout Diagram of UPT8T – Bottom
(Version 14)
testpoint name condition dc–level ac–level
J101 FBUS_TX active state pulsed DC (0V72.8V)
J104 CCONTCSX (CCONT
chip select)
active state pulse active 0V, non–active
2.8V
J108 CHRG_CTRL charger connected pulsed DC (0V/2.8V)
J220 V5V active state nominal 5.0V (min 4.8V, max
5.2V)
J223 CCONTINT (charger,
RTC interrupt)
interrupt pulse active 2.8V, non–active
0V
J224 VCOBBA active state nominal 2.8V (min 2.7V, max
2.85V)
J225 EXTSYSRESETX power on reset state 0V, normal state
2.8V
J226 VCXOPWR power on active state 2.8V, non–active
0V
J227 PURX (power on reset) power up/down reset state 0V, normal state
2.8V
J228 SLEEPCLK (32kHz
clock)
power on pulsed DC (0V/2.8V)
J235 ROM1SELX active state pulse active 0V, non–active
2.8V
J251 AGND pcb ground 0V
J256 COBBADAX active state pulse active 0V, non–active
2.8V
testpoint name condition dc–level ac–level
J500 Control voltage for UHF
VCO module G600
channel 60
channel 1
channel 124
2.25 +/– 0.25 V
> 0.8 V
< 3.7 V
J504 Control voltage for VHF
VCO circuit
typ. 2.0 –2.2 V min 0.5 / max
4.0 V
J508 VSYN_2 ( regulated
supply for PLLS )
2.8 V min 2.7 / max 2.85 V
J534&J5
36
13 MHz IF output to
N250
–95 dBm @ X540
(ext. RF connector )
RXC at level of full
calibrated gain
typ ca. 1.0 – 1.1 V pulsed
min. 0.7 / max. 1.4 V
typ. 50 mVpp balanced
voltage at 13 MHz
J538 13 MHz output from
Z620 to N620
–95 dBm @ X540
(ext. RF connector )
RXC at level of full
calibrated gain
typ. ca. 1.5 V pulsed typ. ca 600 uVrms
J542 VHF VCO output ( 232
MHz )
– typ. 400 mVpp.
> 100 mVpp required
J554 TXC ( TX power control
voltage )
@level 19 typ. ca. 0.6 V pulse
@level 5 typ ca. 1.8 V pulse
J556 TXP ( TX enable ) 2.8 V logic level pulse,
( max. 0.8 V ”0” / min 2.0 V ”1” )
J558 TXQP ( other half of
balanced Q–signal ) 0.8 V pulsed 400 mVpp
J560 TXIP ( other half of bal-
anced I–signal )
0.8 V pulsed 400 mVpp