Motorola CP040 Detailed Service Manual page 433

V_SF
VCO_VSF
4.5V
V_S F
SH250 SH251
SHIELD SHIELD
1
1
L252
27nH
D251
VCO_V_STEER
L251
R
220nH
V_STEE
3.2V to 9.5V
C251 C252
150pF NU
L262
27nH
D261
VCO_MOD
VCO_MOD
L270
220nH
C274
C270
390pF
0.1uF
L272
220nH
SH253
SHIELD
1
C271
R274
L271
33
NU
390pF
C253 C255
9.1pF
6.2pF
C254
C256
L254
12.5nH
3.9pF
2.2pF
R253
47
C257
R254
100
12pF
L255
220nH
C265
C263
5.6pF
6.2pF
C264
L264
1.8%
C266
8nH
2.0pF
3.0pF
C268
3.3%
V_SF
0.5pF
C267
R262
7.5K
9.1pF
R261 1.1%
22K
D262
1SV229
R273
330
C292
VCO_3V
3V
390pF
C272
0.1uF
C273
R272
R271
6.2K
5.1K
.01uF
1
TX_IADJ
2
RX_IADJ
3
U251
SUPER_FLTR
4
COLL_RFIN
4 50U5
5
RX_BASE
6
RX_EMITTER RX_SWITCH
16
TX_BASE TX_SWITCH
15
TX_EMITTER
20
FLIP_IN
19 TRB_IN
PRESC_OUT
R263
V_SF
33
R264
100
L265
220nH
RX: 0V
TX: 3V
VCO_TRB
R275
TRB
C275
100
390pF
UHF3 (490-527 MHz) Voltage Controlled Oscillator Schematic Diagram PCB No. 8486768Z02-A
R277
0
C285
0.1uF
L282
18nH
R284 L292
680 15nH
C290
10
TX_OU T
RX_OUT 8
6.8pF
7
NC
13
NC
VCO_5R
12 L281
5R
18nH
C284
R281
8.2K
390pF
C281
390pF
C286
R285
0
3.9pF
2.5%
R280
L283
NU 4.7K
VCO_PRESC
R276 L276
PRESC
27nH
NU
C276
7.5pF
3-43
VCO_TX_INJ
TX_IN J
1.5%
C291
L291
6.8nH
13pF
1%
C282
4.3pF
R282 VCO_RX_IN J
RX_IN J
2.3%
910
3
1
Q280
2
BFS540
C283
R283
130
390pF