Icom IC-F80DS Service Manual page 37

SECTION 11 VOLTAGE DIAGRAMS
11-1 FRONT UNIT
FRONT UNIT
J1
EXPTT
+5V
+5V
R1
R2
R4
R8
RESB
XRXD
XTXD
RES
GND
FSCL
FSDA
AFON
to MAIN
SPCON
unit J3 CP2
NC
PTTSW
PTTI
EM
KR
PWRSW
VOXOUT
AFVI
OPTV
VCC
VCC
SP+ LED
MIC
GND
FSCL
FSDA
RESB
FSDA
FSCL
J101
VDD1
VDD2.3
RES
SDA
to LCD SCL
VSS
VSS
V_LCD
FSCL
FSDA
LED
J2
CON(1) PTT EXPTT
CON(2) MIC MIC
CON(3) XTXD XTXD
CON(8) VCC VCC
CON(7) DETECT DETECT
CON(9) AFO AFO
CON(6) MICE MICE
CON(5) RESET RESET
CON(4) XRXD XRXD
AFVI AFVI
5V +5V
R1
POWER_SW PWRSW
TP76N937N
GND GND
LED LED
GND GND
SW3_A R1
SW2_A R2
SW2_B R4
SW1_B R8
TEST TP
DS1
UW3804X
S1
TP70TF5164S
2 1
C1 A1
3
B1
5 4
C2 A2
6
B2
8 7
C3 A3
9
B3
VR BOARD
+5V
VCC
Q102
IC101
DTC144EE
R101
S-812C30AMC-C2K
150
1 5
GND NC
2
VIN
3 4
Q103
VOUT NC
DTB123EK
LED ON: 7.2V
3.0V
Q104
DTB123EK
IC1
RX(BUSY): 0V
M62320FP
TX: 5.0V
1 16
SO CS0
R4 100
2 15
SCL CS1
3 14
SDA CS2
Q1 4 13
R5 100
D0 VDD
R1 DTB123EK 5 12
470 D1 D7
6 11
D2 D6
7 10
D3 D5
8 9
GND D4
Q2
R2 DTB123EK
330
+5V
RX(BUSY): 5.0V
TX: 0V
IC2
M62320FP
1 16
SO CS0
R6 100 2 15
SCL CS1
R7 100 3 14
SDA CS2
KS0 4 13
D0 VDD
KS1 5 12
D1 D7
KS2 6 11
D2 D6
KS3 7 10
D3 D5
8 9
GND D4
R271 R263
R263-R278
R272 R264
ERJ2GE-JPW
R273 R265
R274 R266
R275 R267
R261 R3
ERJ3GE-JPW 100k
R276 R268
R277 R269
R278 R270
L1 0.1µ
L2 0.1µ
R16 47
L6 0.1µ R12 47
R13 1k
L3 0.1µ
L5 0.1µ
L7 0.1µ
R15 47
R260 47
R259 47
R11 1k
L4 0.1µ
R37 1k
R36 1k
R35 1k
R34 1k
CP1
D1
NNCD6.2G
11 - 1
+5V
VCC
R103
100
1 S101 2 S103 3 S109
KS3
4 S102 5 S104 6 S110
MCON
KS2
7 S105 8 S107 9 S113
+5V
KS1
* S106 0 S108 # S114
+5V
KS0
KR3
KR2
KR1
5.0V
KR0
D101
DAP222
KR
D102
DAP222
EM
+5V
+A5V
7.2V
EXPTT
E_MIC
XTXD
VCC VCC
OPTV AFON
Q202
AFO IC205 2SB1132
TC4S66F
RES
XRXD
AFVI
PWRSW
R214 D203
SP+
R1
68k MA2S111
AFON
R2
R4
R8
AF ON: 4.0V
OFF: 0V
R222
C247
0.01 82k
AFO
EXPTT
+5V
D201 R204
R216
MA2S111 1k
1k
PTTI
PTT ON: 1.0V
Q201
OFF: 4.9V
UMG2N
PTTSW 1 5
2
3 4
+5V
D205
MA2S111
MCON
P0 S111
R110
100k
E_MIC
+A5V
P1 S112
R111 IC203
R221
100k NJM12902V
100k
12
MIC 14
+
13
-
R217 C216
R219
C202 680p
15k 0.1
ERJ3GE-JPW
P2 S115 R207 27k
R112
100k
C206 0.018
VOX ON: 3.3V
OFF: 0V
P3 S116
D202
R113
MA2S111
10
100k
8 +
9
-
IC203
NJM12902V
VOXOUT
R223 27k
+A5V
4
R212 3.3k
V+
5.0V
GND
11
IC203
NJM12902V
+5V +5V
SPCON
IC201
TA7368F
E_MIC
1 10
NC POUT
2 9
VCC PWGND
3 8
NC PREGND
4 7
VIN PHASE
5 6
RIPPLE NF
Explanatory notes
VOLTAGE LINE
TX LINE
RX LINE
D204
MA2S111
Q206
DTA144EE
+A5V
IC203
NJM12902V
3
1
2
C230 68p
R228 270k
IC204
TC4S66F
MC201
I_MIC
2.1V
IC203
NJM12902V
5
7 +
6
-
SP1
J201
W2
C245 33 +
-
C246 33
R239 470k
R240 470k
Q208
2SC4116
R241 100k
Q209
RSR025N03
Q207
DTC144EU
Q210
RSR025N03
AFO