Motorola Professional GP340 Service Manual page 284

4-8
SWB+
Vdda
4V_3.3V
CLK
CSX
MODIN
DATA
R287
47K
Q288
PRE_IN
R289
3.9
Lowband (30-50 MHz) Synthesizer
C233
.01uF
U204
ADP3300
2
NR
5 IN 4
OUT
3 6
SD ERR
C232
C234
1
0.47uF 0.47uF
U200
LP2980
L225
3.28 Vdc
1 5
VIN VOUT
3 4
100uH
ON_OFF* NC
GND
C298
C280 C281 C299
2.2uF .01uF
2.2uF 2 4.7uF
R222
75K
1.57 Vdc
3.64 Vdc
R223
100K
C258
2.2uF
C287
.01uF
1st Lo frequency
R288
1K
VSF
4.56 Vdc
Y201
75Z03
17 MHz
2.7 V p-p
6 3
IN OUT
C236
100pF
C242
47pF
13 Vdc
C249 C247
4.7uF
.01uF
23
XTAL1
XTAL2 24
L226
8 19
CLK FREFOUT
9 41
4.7uH
CEX MODOUT
10 15
MODIN VMULT1
7 14
DATA VMULT2
30 12
SFIN VMULT3
11
U205
VMULT4
35
PVREF 63A27
21 48
VBPASS AUX1
1
AUX2
40 2
BIAS1 AUX3
39 3
BIAS2 AUX4
26 37
SFCAP TEST1
27 38
SFBASE TEST2 C257
R225
32
PREIN
510
43
IOUT .047uF
18 45
REFSEL IADAPT
42 4
CCOMP LOCK
46
ADAPTSW
17 28 R227 R228
NC1 SFOUT
29 16 100 51
C260
NC2 INDMULT
31 25 .01uF
NC3 WARP
R229
C259
2K
0.47uF
C263
4.7uF
RECEIVE -47dBm SIGNAL AT 35.04MHz WITH 1K TONE.
R219
1.3 - 3.5 Vdc
47K
C237
CR211
2.7pF
C286
D210
K3
.01uF
K2
C285
K1
.01uF
C284
R286
0
.01uF
K3
C283
K2
K1
.01uF
D211
R230
100
16.8MHZ
C206
NP
AUX2
AUX3
R224
VCTRL
200
C256
.047uF
R239
1K
TP200
C261 C255
0.47uF .047uF
0 = UNLOCK
LOCK
Lowband PCB 8485658Z03 / Schematics
5V
A3
A2
A1
A3
A2 R285
A1
100
3.23 Vdc RX / 0 Vdc TX
0.15 Vdc RX / 3.25 Vdc TX
1.5 - 11 Vdc Low band - 17MHz 0.6V p-p
TP201
SH200 SH201
SHIELD SHIELD
FL0830468-O
FL0830468O