Schematic Diagram For Pmle4023B/Pmle4024B Uhf Rf Board, 20/25/12.5 Khz - Motorola GP68 Service Manual

C2
13pF
C1
10pF
C148
150pF
CR102
TXB+
C145
3.3pF C159
C170 150pF
R123
39pF 390
C139
150pF
L115
R173
19.27nH
62
J401
C166 C168
1.0pF 1.0pF
L111
470nH
L113 L112 1
CR101
11.48nH 12.16nH
3
4 Pin C144 C142 C141 C140 5
150pF 5.6pF 10pF 6.8pF
R177
100
TXB+
Q156
BCX52
3 1
R164
2 680
U151
2
RFEN
C156
150pF
R165
62
POWER CONTROL CIRCUIT
TPB+
E303
BEAD F301
3.5A
B+
C309 C310
CR301 P401
150pF 150pF
male_th
2 Pins
DC DISTRIBUTION
Schematic Diagram for
PMLE4023B/PMLE4024B UHF
RF Board, 20/25/12.5 KHz
(For the 12.5 KHz RF Board
component values, please refer
to the parts list.)
6
6881086C09-O March, 1997
+5VRX
C13
NU
C15 C16 C14
.1uF 10nF 150pF
R2
R4
7500 RECEIVER SECTION
430
R1 3
C3 C4 C21 C22 C24 C25
1600
1.8pF 9.1pF 12pF 1.5pF 1.3pF 10pF
1
Q1
C20 L5 C23 L6 L7 C26
3 MMBR941L 2
L1 L2 C5 R3 6.2pF 5.1pF 12nH 11pF
12nH 12nH
1 2
12nH 12nH NU 4300
CR1
MMBD353
TXB+
B+
VCTL TXB+
R126
0.0
R174
1000
2 E101 C133 C132 C104 3
R124 R125
15 150pF 10nF 1uF C113 10K
BEAD 1
150pF
3 C157 C158 C125
CR151
150pF 150pF 150pF
2
Q106 L106
1 R118
MMBT3904
C134 4.22nH 22
L109 150pF
4.22nH
C122
C120 R112
R111 150pF
R121 10nF 360
620
R172 100
100
C
L110 L108 C129 C127 L119
2 Q104
C143 100pF 150pF 3.36nH
4 3.36nH 4.22nH
B
6.8pF
6 C137 C173 C131 C172 C103 R122 C128 C171 E2 E1
MRF5007 L117
3.3pF 10pF 36pF NU NU 33pF 24pF
1000 22nH
Q103
BLT50
R178
100
R175
2 R110
10
1000
C163
3
CR152
C162 R176
150pF 150pF 39K
4 WATT POWER AMPLIFIER
1
B+ VCTL +5V LO +5VRX
R258
Q155 100
BCW68Q C151
2 3 C288 C290 C281
L269
0.1uF 150pF
150pF 150pF C280
1.2uH +F5V
R261
1500
Q152
R161 1nF
1
MMBT3906
1000 2 R159
C283
10K
1 L268 L267 470pF
3 R259 L265
4 1 L266
10K 390nH
18nH 39nH 22nH
C282
3
5 R160 C287 C286 C285 1
1000 15pF
C153 15pF 2.2pF Q251
10pF
MMBR941L
3
3 6 2
0.1uF IDAC
R260
C154 1 C284 10K
R262
3.3uF Q153 390 39pF
MMBT3904
R162
1000 C152 R150
2
L264
150pF 0.0 C291 C277
R264 18nH
10
15pF R265 R263 150pF C276 C275
2.0pF 1.8pF
750 750
BATTERY PACK
CHGP
C271 R256
BAT+ PA HEAT SINK VCO TOP SHEILD
150pF 30K
SH101 SH201
7.5V
+F5V
CHGM
R52 R54
2000
33K
L52 C84
750nH C58 R56
75pF C50
R51 3.3pF
51 0.1uF 2700
3
U41
MIXER
Y51 C85 C53
1 73.35MHz 3 1
1 4
RF IF L51
3 5 C51
LO GND3
30pF 150nH 680pF 36pF
2 6
GND1 GND2 Q51
C52
2
1.8pF L53 MMBR941L
2
NU R53
12K
LO
B+
R63
10K
VCTL +5VTX
3
R117
1
100 +5V
C126
10nF C116 C108
C115 C107 C106 Q52
2
10nF 10nF C86
150pF 150pF 150pF MMBT3904
0.1uF
L104 L102
R64
470nH 470nH 10K
R108 R104
680 560
R105
4700
C105
C114 R101
C117 3 10nF L103 C110 3 1000 150pF
150pF 150pF
L105 33nH
1
1
12.16nH Q102 Q101
R106 R102
MMBR951L MMBR951L
C119 C118 2000 C112 C111
2 2 560
24pF 6.2pF 4.3pF 1.3pF
R107 R103
4.7
4.7
E102
BEAD
+F5V C261
6.8pF
C278
R257
150pF
36K
C279 C263
C265
L258 22pF
150pF
390nH 9.1pF
C289
CR253
100pF C262 C264 L260
L259
3.6pF NU 12nH IT363
.47uH
R254
6 3 7 8 9 10
220 L261
56nH
2 B1 11
RX
C267
+F5V
0.22uF
4 12
TX BI1
U251
L256 L257
10nH 390nH
VCO BUFFER IC
22 13 C266
NC4 VC
150pF
R251
220 C259 C260
24 BI2 14
NC5 150pF 0.1uF
L254
C258 82nH
L252
1 15 .22uF .39uH
GND2 B2
C253 C255
27pF VCO SECTION 9.1pF
19 21 23 5 20 18 17 16
C252 C254 L253 C256 C272 CR251
C269 6.2pF 1.2pF NU
8.2nH 1.0pF IT363
100pF
L270
R253
.39uH
C251
L251 CR252 L255
3.3pF
.39uH C257 C273 R252
R255 1SV229 22nH
C268 C274 150pF 150pF 820
200K
150pF NU
C270
150pF
+F5V
R55
+5VRX
CF51 CF52
100
3 3
C57 C74
0.1uF
1.5nF
1 2 1 2
4 3 36 35 33 32
CR51
C54
MMBD353
51pF C59
2 1
L54 10nF
3
6 PPC_AMP_IN
680nH
5
C55 C56 PPC_AMP_OUT DEMOD_OUT 31
10pF C60
NU
0.1uF
C75
0.47uF
8 IF_IN
AUDIO_IN 29
1
GND
AUDIO_OUT 28
13 A+_B+
2
14
DRIVE
C61
U51
1 7 LO_IN 23
SQ_LIM_OUT
IFIC
2.4pF 10
OSC_OUT
SQ_ATTEN_IN 20
Q53 3
9
MMBT3906 OSC_FB
27 22
T_R ADAPT
+5VRX
2
+5V VCC1
15
SQ_OUT
C63
R58 C88 12
VCC2
5600 6.2pF 1nF
C62
7.5pF 17 18
VCC3 FAST_SQ
34
VCC4
30 C76 C80
SQ_NOISE
NU NU
25
R57 Y53 RSSI_OUT_2
4300
72.895MHz
16 19 21 11 26 24
C67
0.1uF
C71
C68 C69 C73
L55 R59 C70 R60 R61
680nH 3.3uF 100K .039uF 13K 68K 510pF
4.7uF 0.1uF
C72
C64
15pF C65 C66 10nF R62
4.7uF 0.1uF 7500
+5V
C238
L205
100pF
SHORT
MULTIPLIER
CR202 CR201 C243 C213 C241 C240
2 1 2 1 150pF 150pF
150pF 150pF
NC
3 3
C237
C231 C222 C204
100pF
10nF 150pF 4.7uF C203 C202
10nF 10nF
R205 C219
3300
32 10 9 2 7 150pF
29
C215 C216
R202 I_OUT
5.6nF 0.1uF
2200
31 8
I_ADAPT MOD_IN
L201
4 11 R206
0.39uH
R204 GND FREQ_OUT
82
13 12 2200
LOOP FILTER
GND DC_5V_REF_OSC
U201
30 14
GND XTAL_1
FRACT-N SYNTHESIZER IC
C205
C214 28 15
MOD_OUT XTAL_2
1uF
1 16 270pF
SL1 AUX_3 WARP
20 17
PRE_IN SUP_CAP
C217
R211
C235 47K
4.7uF
.018uF
6 5 27 26 18 21 19 23 3 22 24 25
+5V
C224 NC NC
NC
150pF
R203
220K
C209
150pF
C210 C212 C242 C208
C236 C239 C207
4.7uF 150pF 150pF 0.1uF C211
4.7uF
150pF 4.7uF
L204 L203 NU
10K
27nH 0.39uH
CLK
C227 C226
1.2pF 18pF
DATA
C220 C221
150pF 150pF
PRESCALER FILTER
+F5V
J301
CONN_RF
7 DETAUDIO
C77
6
SQATIN
C79 0.1uF
14 SQATOUT
51pF
12
ADAPT
10
CSQDET
5 FASTSQ
C81 C82 4
RSSI
NU NU
3 B+
B+
1
GND GND
16
+5V +5V
8 +5VRX
+5VRX
9
+5VTX +5VTX
2
IDAC IDAC
13 RFEN
RFEN
11
LOCK
18 SYNEN
C228 15
MODIN
150pF
C218
150pF
20
FREF
19 CLK
CLK
R215
17
1000 DATA DATA
R216
24K
C223
C230
33pF 0.1uF
Y201
16.8MHz
C233
CR203
4.7pF
1SV232
C206 R207
2200
47pF
63D81086C56-A