Figure 7-6. Microprocessor And Keypad Schematic Diagram - Motorola EP350 Service Manual

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)
BUSY
PLL_CLK
PLL_STB
PLL_DATA
+3.3V
RX_EN
R194 SQ_CS
10K
SQ_U/D
C140
TX_PWR_LOW
47nF
TX_PWR_CS
MIC1
TX_AF1
C141
NA TX_PWR_U/D
C142
470pF
+5V
C1017
470pF R171 R172 R173
10K 10K 10K
R174 100K
R175 51K
R176 24K
FTV
R177
C143
20K
0.1uF
Q120
KRC404
Q121
KRC404
Q122
+3.3V
KRC404
R507
10K
C571
15nF
RT501
10K(TH)
+3.3V
C1016
0.1uF
R167
100K
R1005 R1004 R165
10nF 10K 3K
BEEP
C E
KTA 2014
R168
Q112
C198
100K B
NA
R1006
NA
E
C
KTA2014
Q111
B
R163
100K
R164
100K
SWB+
C195
220pF
Q4
Q3
Q2
Q1
STD
U106_SW
PTT2
20KHZ_SEL
PLL_PS
76
TX_PWR_U/D
BEEP_CON
77
MIC_MUTE2
78
79
PWDN DTMF_DEC_EN
80
FREQ_CON3
81
FREQ_CON2
82
FREQ_CON1
83
AUDIO_MUTE_CON
84
TX_EN1
85
TX_EN2
86
N/S_SW
87
RX_TONE_CON1 RX_TONE_CON1
88
RX_TONE_CON2 RX_TONE_CON2
89
90
ANL_SUBTONE_IN
91
VOX_IN
VOX
92
LOW_BATT_IN
LOW_BATT
93
TEMP_IN
AUDIO_MUTE_CON
94
A_GND
TX_EN1
95
RSSI_IN
TX_EN2
96
N/S_SW V_REF
+3.3V
A_VCC
98
RSSI
LCD_CS
99
LCD_CLK
R113 RX_TONE_EN 100
47K
C123 C124
0.1uF 1uF
+3.3V
R178
100K
C144
U107
0.1uF(K)
1 2
DTMF_OUT
KIA7027AT
R169
1.2K
R190 R184
15K 15K
+3.3V
R153
68K(1%)
LOW_BATT
+
C194
10uF / 16V RX_TONE_EN
R154
47K(1%)
CR101
NA
8 1
+3.3V VCC A0
7 2
OC A1
6 3
SCL
A2
5 4
SDA VSS
R139 U104
24LC64
10K
C147
0.1uF(K)
U102_SDATA
U102_SCLK
U102_CSN
50
SW_IN3
49
DTMF_CON
48
SW_SCAN1
47
SW_SCAN2
46
SW_SCAN3
45
SW_SCAN4
44
PTT1
43
PGM_BUTTON1
42
PGM_BUTTON2
41
U101
PGM_BUTTON3
40
LEFT_BUTTON
M30302FCPGP
39
38
RIGHT_BUTTON
37
36
LED(RED)
35
LED(GREEN)
34
R195 100R
PRG / CLONE_RX
33
R152 680R
PRG / CLONE_TX
32
FUN_KEY2
31
AK_DATA
30
AK_CLK
29
AK_CSN
VOX_EN
28
VOX_EN
27
PLL_LD
DTMF_OUT
26
DTMF_OUT
R185
C145
15pF 0R
R114
10k
FL101 R148
1M
7.372MHZ
C146
15pF
B_S2
B_S1
A_S2
A_S3
FUN_KEY1
MOD_CON_CS
MOD_CON_U/D
FUN_KEY2
PLL_LD
PROGRAM_DATA
LED(GREEN)
LED(RED)
PTT1
LCD101
LCD_BEACON
LCD Flex.PCB
+3.3V
SWB+
J101
05004HR_07C01S(G)
Q110
KRC104
1
1 2
2 3
3 4
4 5
5
6
6
7
7 8
8 9
9 10
10 11
11 12
12 13
13 14
14
15
15
16
16 17
17 18
18
19
19
20
20 21
21
22
22
2
1
MIC1
0B27P40(2.8mm)
TONE_IN

Figure 7-6. Microprocessor and Keypad Schematic Diagram

7-7
R155
470R
CR110 CR111
R156
1K
CR112 CR113
R157
1K
SH201
CR114 CR115 R158
1K
CR110~CR115 : BL-HG036
+3.3V
R_ARROW
L_ARROW
P1
P2 P3
R108
4.7K
1
2 3
R109 4.7K
4 5 6
4.7K
R112
7 8 9
4.7K
R119
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