Motorola EP450 Service Manual

VHF 146-174 MHz PCB 8486342Z13-C Schematic Diagrams, Overlays, and Parts Lists 6-11
HKLN4216A November 24, 2003
AUDI O
DC_REGULATION
MICROPROCESSOR
ACCESSORY/KEYPA D
Controller
CONNECTOR
CNTL_5T
C50 4
1000pF
1000p
F
C507
1000pF
1000pF
C506
11
C503
SPI_DATA_OUT
SQ_DET
SW_B +
VO X
VS_AUDIO_SEL
VS_GAIN_SEL
uP_CL K
CNTL_TX_EN
A
EXT_MIC_PTT
F120
0
HSIO
LSI O
MOD_OUT
OPT_MI
C
OPT_RX_AUD_RETURN
OPT_RX_AUD_SEND_DETECTO
R
OPT_RX_AUD_SEND_UNMUTED
OPT_TX_AUD_FLAT_RETURN
OPT_TX_AUD_RETURN
OPT_TX_AUD_SEN
D
PWR_SET
RESET
SC
I
SPI_CLK
9
16_8_MHZ
3V 5V
ASFIC_CS
BATT_CHARGE
BOOT_ENA
BW_SEL
CH_ACT
DEMO D
100
7
CNTL_USWB+
R504
CNTL_5
V
SW_B
+
12
3
SW_B
+3
V
CNTL_MOD_OU
T
3V
D3_3V
CNTL_3
V
1uF
SW_B
+
NC
BK1005HM47
1
E500
C501
17
C505
1000pF
PC3
8
C408
1000pF
C0
C0
C1
C1
GN D
7
GND1
9
PC0
1
PC1
2
PC2
4
5T D3_3V
SWITCH
S440
TP40 3
TP301
3V
5R
5T
5V
BATT_CHARGE
D3_3 V
ON_OF F
RESET
RX_EN A
SWB+
TX_EN A
USWB
+
VOLUME
14
C407
1000pF
CNTL_SYNTH_C
S
3
A2
2
B1
4
B2
CNTL_SPI_CLK
SWITCH
S443
1
A1
C403
150p F
32
1000pF
C40 2
5R
CNTL_LOCK
R505
100
1
A1
3
A2
2
B1
4
B2
CNTL_RSSI
3V
SWITCH
S441
8
24
6
29
28
27
C406
150p F
C409
1000pF
150pF
C405
5V
C404
1000pF
CNTL_SPI_DATA_OUT
CNTL_5R
31
30
5V
R503
13
10 0
21
18
19
TP40 4
15
16
1000p
F
23
10
C500
CNTL_BW_SEL
1
A1
3
A2
B1
2
4
B2
USWB
+
5V
SYNTH_C S
TX_EN A
VOLUME
VO X
VS_CS
VS_IN T
VS_RAC
uP_CLK
SWITCH
S442
LSI O
ON_OF F
OPT_BUTTON_ 1
OPT_BUTTON_ 2
OPT_DATA_READY
OPT_EN A
PTT
RESET
RSSI
RX_ENA
SC
I
SPI_CLK
SPI_DATA_IN
SPI_DATA_OUT
SQ_DET
SW_B
+
BATT_DETEC
T
BOOT_ENA
CH_ACT
D3_3 V
DISPL_COM_DATA_SEL
DISP_EN A
EXT_MIC_PTT
F120 0
FREQ_SEL_ 0
FREQ_SEL_
1
FREQ_SEL_
2
FREQ_SEL_ 3
HSIO
KEYPAD_COL
KEYPAD_ROW
LOCK
100
R501
3V
5V
ASFIC_CS
BACKLIGHT
R502
100
4
CNTL_DEMO D
D3_3
V
3V
CNTL_16_8_MHZ
CNTL_PWR_SET
2
25
26
J460-1
1
20
22
5
SW_B
+
5T
SPI_CLK
BW_SEL
MOD_OUT
SYNTH_CS
RSSI
SPI_DATA_OUT
5R
5V
USWB+
TX_ENA
DEMOD
3V
16_8_MHZ
LOCK
PWR_SET
Figure 6-9. VHF (146-174 MHz) Controller Interconnect Schematic Diagram

Motorola EP450 Specifications

General

Channel Capacity	16 channels
Operating Temperature	-30°C to +60°C
IP Rating	IP54
Frequency Range	VHF: 136-174 MHz, UHF: 403-470 MHz
Weight	Approximately 350g (with standard battery)