Motorola Pr400 Detailed 6881096c25 B Manual

Chapter 7 VHF Schematic Diagrams, Overlays, and 
Parts Lists
7.1 Introduction
This section provides schematic diagrams, overlays, and parts lists for the radio circuit boards and 
interface connections.
7.1.1 Notes For All Schematics and Circuit Boards
* Component is frequency sensitive. Refer to the Electrical Parts List for value and usage.
1. Unless otherwise stated, resistance values are in ohms (K = 1000), capacitance values are in 
picofarads (pF) or microfarads (µF), and inductance values are in...

June, 20056881096C25-B
7-2VHF Schematic Diagrams, Overlays, and Parts Lists: Introduction
7. Circuit Block Interconnection Legend:
301-400 DC Regulation
401-450Microprocessor
451-550 Audio
Name Description
USWB+Unswitched Battery Voltage (always on)
5V 5 volts (regulated)
5R5 volts in RX mode only
5T 5 volts in TX mode only
RESETLow-line reset signal from U320 to uP
D3_3V Digital 3.3 volts (regulated)
3VAnalog 3 volts (regulated)
TX_ENA Transmit enable signal from uP to transmitter
PWR_SETDC voltage from...

6881096C25-BJune, 2005
VHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 7-3
7.1.2 Six Layer Circuit Board
Figure 7-1.  Six-Layer Circuit Board: Copper Steps in Layer Sequence 
7.2 Speaker and Microphone Schematic
Figure 7-2.  Speaker and Microphone Schematic
7.2.1 Speaker and Microphone Parts List
Reference
DesignatorMotorola Part 
No.Description
MK15085880L01Microphone, electret
SP1 5085738Z08
 Speaker assembly with 
connector
LAYER 1 (L1)
LAYER 2 (L2)
LAYER 3 (L3)...

June, 20056881096C25-B
Notes:
7-4VHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 

VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists7-56881096C25-BJune, 2005Chapter 7 VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists
RX_FE_VHF_R1
CONTROLLER
VCO_VHF_R1
TX_VHF_R1
RX_BE
SYNTH_VHF_R1
V_SF V_STEER 5V 3V5R
16_8_MHZ
3V 5V
LOCK MOD_IN
PRESC
SPI_CLK
SPI_DATA_OUT SYNTH_CS
TRB VCO_MOD RSSI5V5R
3V 5RUSWB+
5V USWB+
V_SF V_STEER5T
3V
5T
PWR_SET
RX_OUT TX_ENA
TX_INJUSWB+ 5V
BW_SEL DEMOD
IF_IN
LOCK MOD_OUTPWR_SET
RSSI
SPI_CLK...

7-6VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts ListsJune, 20056881096C25-B
 
700mV (RF) 3.95V (Rx)
2.0V (Rx) 3.38V (Rx)3.95V (Rx)0V (Tx) 5.0V (Rx)
485mV (RF)500mV (RF)
445mV (RF) 705mV (RF) 3.9V (Rx)
125 mV (RF) 128 mV (RF)
0.74V (Rx)
C30
30pF
0.1uF C995.6KRF BALUN
5
NC
4
63
2
1
R25T41
IO11
2 IO2 IO3
3IO4
4
NC
TP21
CR41HSMS2829
C3668nH
30pF C22
1000pFL33
L3
C41
15pF 68nH
FE_RF_INJ
  0 R26
1
C44
20pF
SH1
SHIELD68pF R23
22K
L21
NUC34 R24
750R51
51
33pFC8
30pF
63
2
1 C7
T42
 IF...

VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists7-76881096C25-BJune, 2005
5V for 25kHz
RX Back End (Overtone)
0V for 12.5kHz
3.39V
3.05V
0.74V
1.5V 2.1V When -47 dBm @ antenna
9.1pF
1.1%C5312
3
5V 1
23 D51
13
2D52
CR51C71
  IF_DEMOD TC7W04F 17
0.1uF
GND1
3
4
GND2
IN 1
OUT
2
U52-1
C69CFWC455EFL53
12K0.1uF
C73 R521
IN2
OUT
4700pF FL54
CFWC455G
GND1
3
GND24
0.1uFC55 5V
0.1uF C56C62
0.1uF
C60
0.1uFC67
0.1uF
R53
33K2.4K
Q70MMBT3904 13
2 R60
C80
22pF
1% C59
2.7pFR73
1.8K NC
R74
1.2K...

7-8VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts ListsJune, 20056881096C25-B
C206 C201
NU
RX: 0V3.0V to 8.0V 4.5V
UNLOCK: 0V
D201 C203
100
NU
NUTCXO
NU 62pF
0V0V
Y201NU
TX: 3VLOCK: 3V
C202
0.01uF
R206Crystal
107 mV (RF)
14R06 NU
Reference Oscillator
3V
1SV23247k
3V
2.7pFNU
R202NU
Y202150k
45J68 220pF
44 mV (RF)
205 mV (RF)
2.4 V (TYP)
D2011SV232
6
A15
A24
A3
K1
1K22K33
D220
 
110KR230
 
FN_DATA
1000pF C231
1200pF C244
NC
0.1uFC216 C241
 
FN_PRESC
1200pF
NU
FN_TRB
C206
FN_5V
C211...

VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts Lists7-96881096C25-BJune, 2005
3.0V to 8.0V4.5V
RX: 0V TX: 3V206 mV (RF)
850 mV (RF) 1200 mV (RF)
1.35 V (Rx) 1.89 V (Rx)
0.1uF 0.1uFC285
L281 C274
33nH
68nH
10pF C264L254
10pF
1.0% C256
750
 
VCO_VSF
R282 R270
L252
560nH
 18
NU
VCO_MOD
L283C282
C266
1.0% 10pF9.1pF 47 R253
C286
11pF
L265
330nH
1SV229D262  680 R284
C268
3.7% 2.7pFC273
.01uF 
C276
5.1pF R272
9.1K
 VCO_TX_INJ
6pF C254
180 R283 C290
1200pF C27551pF
  13
2
L264
47nHBFS540...

7-10VHF 136-162 MHz (8486769Z02-A) Schematic Diagrams, Overlays, and Parts ListsJune, 20056881096C25-B
0.9 V (Tx) 7.5 V
0 V (Rx)
0 V (Rx)
7.25 V (Tx) 1.8V (Tx)7.4 V (Rx)
0.15 V (Tx)
2.5 V (Low)
3.0 V (Hi)
2.4 V (Hi)
1.06 V (Low)0 V (Rx)
7.3 V (Tx)
2.5 V (Low)
3.0 V (Hi)
1100 mV (RF)DO NOT MEASURE
1500 mV (RF)
4.9 V (Tx)
820 mV (RF)1.5 V (Tx)0 V (Rx)
1.6 V (Tx)
0 V (Rx)
1500pFR157
5.6K
C10043.67nHL132
TAB33
TAB44
C172
1500pF
M140
ANTENNA_NUT
TAB1 1
TAB2 2
R171
6.8K
R121
150
C102
0.1uF
C107
10pF
L102...