Nokia 7250, 7250i Service Manual
&&67HFKQLFDO'RFXPHQWDWLRQ
System Module
6FKHPDWLFV
+1+/-
3RZHU$PSOLILHUDQG'HWHFWLRQ
C729
R715
L704
D
C
B
A
Last references:
56p
C729
C707
R706
1p8
10n
4R3
C724
T700
LDB211G8010C-001
1
2
3
4
5
27p
C726
C705
27p
1n0
C719
1k2
R709
C725
4u7
15p
C710
1800/1900
29
Band_sel_
1800/1900
1800/1900
3
Vbat_
1800/1900
1800/1900
Vbat_
1800/1900
1800/1900
30
4
Identificat
Mode
6
Vbat_900
7
8
RFout_900
1800/1900
RFout_
2
1800/1900
Vbat_ 21
1800/1900
Vpctrl_ 22
1800/1900
Vtxb_ 23
1800/1900
25
RFin_
1800/1900
26
DC_sense_
Iref_
27
1800/1900
Isense_
28
11
Vtxlo_900
12
Isense_900
Iref_900
13
DC_sense_
14
900
RFin_900
15
Vtxb_900
17
18
Vpctrl_900
Vbat_900
19
C714
1n0
1n0
RF9219E2.X
N700
1,5,9,16,20,24,31,32= GND
Vbat_900
10
C708
1p0
C715
56p
4n7H
L702
42R/100MHz
33nH
L700
L703
C711
2p7
C727
150u_10V
27p
C706
68n
C704
27p
C730
C728
1n0
C718
100p
not_assembled
33p
C720
33R
R703
22nH
L701
0R
R750
C709
15p
C713
C703
1n0
68n
15p
C723
R704
33R
Z700
897.5MHz
OUT_UNBAL
GND
IN
IN
IN
3k9
R710
B39901-B4179-U510
R715
2R2
R714
0R
VPCTRL_1800_1900
DET
BANDSEL_1800_1900
Iref_900
Iref_1800_1900
VR6
DC_sense
VTXLO_900
VBAT
MODE
VPCTRL_900
RFout_1800_1900
RFout_900
RFinM_900
RFinM_1800_1900
RFinP_1800_1900
VTXB_900
VTXB_1800_1900
RFinP_900