Icom IC F121S - Manual (Page 70)

SECTION 11 VOLTAGE DIAGRAMS
11-1 FRONT UNIT
J2
DIM
DAST
RMUT
MMUT
OPT3
OPT2
OPT1
BUSY
SCK
SI
SO
CIRQ
CCS
MIC
EPTT
HORNO
BEEP
PWON
8V
GND
GND
TONE
TENC
NOIS
NWC
TMUT
UNLK
PLST
CDEC
SDEC
OV12
RSSI
LVIN
TEMP
BATV
RXC
AFON
5V
CPU5
AFO
to
MAIN
unit J2
IC1
HD6433687A05FP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
P86/AN6
P87/AN7
AVCC
X2
X1
VCL
RES
TEST
VSS
OSC2
OSC1
VCC
P50/WKP0
P51/WKP1
P34
P35
P36 P37 P52/WKP2 P53/WKP3 P54/WKP4 P55/WKP5/ADTRG P10/TMOW P11/PWM P12 P56/SDA P57/SCL P74/TMRIV P75/TMCIV P76/TMOV P24 P63/FTI0D0
P62/FTI0C0
P61/FTI0B0
NMI
P60/FTI0A0
P64/FTI0A1
P65/FTI0B1
P66/FTI0C1
P67/FTI0D1
P85
P86
P87
P20/SCK3
P21/RXD
P22/TXD
P23
P70/SCK3_2
P71/RXD_2 P72/TXD_2
P14/IRQ0
P15/IRQ1/TMIB1
P16/IRQ2
P17/IRQ3/TRGV
P33 P32 P31 P30
P83/AN3 P82/AN2 P81/AN1 P80/AN0 P84/AN4 P85/AN5
C74 47p C50 47p C54 47p
L2 1.0 µ
PWON
BEEP
DIM
TONE
DAST
TENC
RMUT
NOIS
MMUT
NWC
OPT3
TMUT
OPT2
UNLK
OPT1
PLST
BUSY
CDEC
SCK
SDEC
SI
OV12
SO
RSSI
CIRQ
LVIN
CCS
TEMP
MIC
BATV
EPTT
RXC
HORNO
AFON
UNLK RXC
R56 1k
P0 P1 CENC2 CENC1 CENC0 P2 P3 SCK SO
8
7 ESCL
ESDA
6
5
1
2
3
4
VCC
WP
SCL
SDA A0
A1
A2
VSS
IC3
HN58X2416TI
R58 10k R68 10k
R54
1k
R53
1k
SI
BUSY
OPT2
OPT1
OPT3
AFON
NWC
PWON
TMUT
EXOE
EXST
R52 1k
R50 1k
POSW
DIM NOIS CIRQ CCS PTT
EPTT AFVI CDEC SDEC OV12 RSSI LVIN CLO CLI
D5
MA2S111
CP1
C35 0.1
TEMP
BATV
RES
R51 100k
SENC0
SENC1 R48
12k
R49
12k D4 MA77
C34 470p
R47 12k
C33
68p
C32 15p
X1
CR-520
R45
10
C31 22p
R46
1M
CD
NC
OUT
VDD
VSS
R67 10k
C30 0.027
IC2
S-80942CNMC-G9C
RMUT
MMUT
DUSE
DUSE
Q3
DTC144EU
C19 0.1 R29 18k
C85 0.001
R28
4.7k
14 +
-
12
13
IC5
NJM12902V
TENC
C17 820p C16 0.1
R27
47k R26
47k
C15 0.015
R24
47k
R25 22k
R22 22k
R21 56k
R20 180k
C14 0.001
CENC0
CPU5V CPU5V
5V
5V
8V
5V
8V
CENC1
CENC2
7
IC5
NJM12902V
6
5
-
+ TONE
BEEP
C24 68p
R39
68k
C23
0.0082
R38
68k
1
IC5
NJM12902V
2
3
-
+
C21 0.0056 C22 180p
R37
68k
SENC3
R33 22k
R36
68k
C20 0.0027
R35
68k
R34 22k
R32 47k
SENC2
SENC1
R31 100k
SENCO
R30 220k
C29 10
11
GND
V+
4
IC5
NJM12902V
C28 0.1
-
+
9
10
IC5
NJM12902V
8
C87 0.001
R44 150k
C27 270p
C76 0.1 R43 33k
R42 39k C25 0.01
C26
0.1 R41
10k
R40 47k
J1
8V
CLO
AFO
PTT
MICE
MIC
GND
CLI
C78 0.001
R16 1k
L1 10 µ
R71 1k
C7 47p C8 0.001 C9 0.001 C10 0.001 C11 47p C12 0.001 R19
100k
D3 MA8056
CLO
CLI
R18
100k D2
MA8056
PTT
CP2
R17 100k R69 100k D1 MA8056
BEEP
R59 RV-150
P3
C6 47p
P2
P1
P0
POSW
C5 47p C4 47p C3 47p C2 47p
R64 100k R63 100k R62 100k R61 100k R60 100k R14 10k
AFVI
5V
S1
S2
S3
S4
S5
1
2
3
4
6
7
8
9
10
5 CH1
CH2
CH3
CH4
LP0
LP1
LP2
LIGT2
LIGT1
11
12
13
14
15
16
17
18
19
20
IC4
BU2092FV
VDD
QE
Q11
Q10
Q9
Q8
Q7
NC
NC
Q6 VSS
DATA
CLK
LCK
Q0
Q1
Q2
Q3
Q4
Q5
Q1
2SC4081
R11 560
R12
390
Q2
DTC114TU
HORNO
5V
EXDE
R65 100k
C1 0.1
R1 1.8k
FRONT UNIT
R2 390
DS1
CL-165HR/YG
DS2
R3
TLED
RLED
1k
DS3
R4
1k
R5
1k
DS4
DS5
R6
680
R7
680
DS6
R8
680
DS7
R9
680
DS8
DS9
R72
1.5k
R10
1.5k
DS10
DS2-10 SML-311YT
to
mic
Jack
SO
SCK
EXST
R13
10k
C77 0.047
R70 1.5k
R66 100k
R15 1k
5
4
1
2
3
C75 0.1
SENC3 SENC2
PLST
DAST
R55 1k
BEEP
R57 1M
C36 0.1
R23
47k
C86 0.001
R73
390k
Dim ON: 2.6V
OFF: 7.2V
TX: 0V
RX: 4.9V
7.9V
19.7 MHz
2.1Vp-p
5.0V
DTCS ON: 4.9V
OFF: 0V
MEASUREMENT CONDITIONS
VOLTMETER
Amplitude(Oscilloscope) : 100 MHz
Frequency : 465 MHz
Transmission : 25 W
11 - 1