Icom IC-706MKIIG Service Manual page 57

A
MAIN UNIT (2)
D551
L551 L552
HSB88WS
LR-317 LR-317
B
R553
270
R551
270
C
Q573
Q572
2SC4081 R588
2SC4081
47k
D923
R571
4.7k MA2S111
D573
CPH5513
C581 56p
3 2
4
C580 56p
5 1 2IF
Q571
DTC114EE
R584
470
R574
220
C576
0.0047
D
IC571
C578
µPC2713T
0.0047
3 4
GND OUT
2 5
GND GND
1 6
IN VCC
C579
0.0047
C577 0.0047 R580 100
E
C588 0.1 R581 220
F
G
H
L464 4.7uH
I
8V
J
14V
K
R8V
L
M
N
O
J431
SNDSR SNDSR
SEND SEND
MICE MICE
MIC MIC
AT13 AT13
14V 14V
14V 14V
14V 14V
GND
SDSS SDSS
HREF HREF FILTER
J12
HFOR HFOR
GND
L7 L7
L6 L6
L5 L5
L4 L4
L3 L3
L2 L2
L1 L1
J461
AMOD AMOD
DIN DIN
DOUT DOUT
T8V T8V
8V 8V
AFO AFO
SQLS SQLS
AAF AAF
PTTP PTTP
GND
EALD EALC FILTER
J9
U/D U/D
DOT DOT
CASH DASH
KEY KEY
BAND BAND
BDT BDT
FSKK FSKK
CIVE CIVE
CIV CIV
CP551
J551
2LO
PLL
P681
MAIN UNIT (3)
MAIN UNIT (2)
DRIV 14V
DRIV 14V
HFOR 8V
HFOR 8V
VFOR 5V
VFOR 5V
UFOR R8V
UFOR AMS8
HREF T8V
HREF WFMB
VREF R8V HV
VREF R8V
UREF T8V H5V
UREF T8V
UL AGC 2IF
UL AGC
BDT ALC
BDT ALC
KEY L1
KEY L1
STRT L2
STRT L2
CIV L3
CIV L3
CIVE L4
CIVE L4
FSKK L5
FSKK L5
DASH L6
DASH L6
DOT L7
DOT L7
U/D L8
U/D L8
BAND L9
BAND L9
DIN B0
DIN B0
DOUT B7
DOUT B7
MIC B7W
MIC B7W
MICE BHF
MICE BHF
AMOD 1F15
AMOD 1F15
AFO ATTS
AFO ATTS
AAF PR1S
AAF PR1S
EALC PR2S
EALC PR2S
SNOSR PR3S
SNOSR PR3S
SEND PR4S
SEND PR4S
SDSS TB1V
SDSS TB1V
PTTP TB2V
PTTP TB2V
ICH TB3V
ICH TB3V
ICL TB4V
ICL TB4V
WFAF SQLS
WFAF SQLS
NBS
2IF NBS IC891a
WCNT
NJM2902V
GND WCNT
1
11
CP791
J791
BFO
PLL
J991
C1410
0.0047
J1431
AFI AFI
C883
AFIE AFIE 1
PLL AFOE AFOE
P251
AFO AFO
C1397
0.0047
C1391
0.0047
C1382
0.0047
IC861
BU4052BCFV
C1381
1
0.0047 Y0
2
Y2
J1421 3
Y
LRXD LRXD 4
Y3
LTXD LTXD 5
Y1
8V 6
INH
AFO AFO 7
VEE
FRONT GND 8
VSS
MP19
MIC MIC
MICE
MICE
PWK PWK
J1381
HV
14V
14V
FSKK FSKK
DDT
DDT
IMST IMST
IDS IDS
DINT
DINT
GND
AAF AAF
POWS POWS
8V
8V
AFBP AFBP
UL UL
PLL DSPS DSPS
J254
5V
AFGC
AFGC
SPS SPS
MLLV MLLV
PCE
PCE
PBST PBST
BOT BOT
PCK PCK
CON0 CON0
CON1 CON1
CON2 CON2
PDST PDST
DRES DRES
H5V
C899 R912 R913
0.001 100k 470
BAND
R898
IC891d
100k
13
- 14
12
+
IC891b
R903
6
4.7k - 7 BANV
5
+
SPCH
C897 1
AFBP
C896
0.1
14V
R892 R890
AMAF
56k
150k
FMAF
SSAF
R893
CTCV
4 47k
2 8V
-
3
+
BFO
BEEP
R843
AFI
1k
IC891c
R882
9
8 - 10k
10
+
C862
0.0047
5V
T8V
16
VDD
15
X2
14
X1
13
IC1141
X
C1141
12 BU4052BCFV
X0 0.47
11 WFAF DIN 1
X3
10 2
A
R861
9 3
22k
B
4
5
RXS 6
7
8
AFIE
8V
R937
10k
R953
C938
10k
100p
IC931
µPC5023-077
R939 C1144 R1149
13 12
220k NC VCC 0.1 10k
14 11
AVI SWC
C934
15 10
470p AVO VCAC
16 9
MUTE VCAO
17 8
VOXO VCAI
R933 R949
18 7
100k VOXI SWO 47k R948 C946
19 6
BU2O BU1O 47k 0.1
20 5
BU2I BU1I
21 4
C945 1
AMPO SWI
22 3
AMP- CMPO
23 2
AMP+ CMPI R946
24 1
10k
GND NC R945 R944
200k 22k
C931
1
R942 R941
D932 D931
1k 220
DA221 DA221
10 - 4
A
B
C
D
E
F
G
H
I
J
IC811b
6
7 -
5
+
Q777
2SA1576
Q774
2SC4081
Q776
2SC4081
R781
R783 100k
47k
K
L
M
N
O
P
Q
R
IC841
TA4101F
1 8
IFOUT COLECT
2 7
C851
VCC GND
100p
3 6
OSCIN BASE
4 5
BASE BASE
S
T
U
R1142 R1141
47k 47k
16
Y0 VDD
15
Y2 X2
14
Y X1
13
Y3 X
12
Y1 X0
11
INH X3
10 MODS
VEE A
9 D96S
VSS B
V
R964
C963
33k
10
W
C961
0.47
Q961
2SC4081
X
Y
Z