Icom IC-706MKIIG Service Manual page 69

• MAIN UNIT
MAIN (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
WCNT
GND WCNT
CP791
J791
BFO
PLL
J991
C1410
0.0047
J1431
AFI AFI
AFIE AFIE
PLL AFOE AFOE
P251
AFO AFO
C1397
0.0047
C1391
0.0047
C1382
0.0047
C1381
0.0047
J1421
LRXD LRXD
LTXD LTXD
8V
AFO AFO
FRONT GND
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 POST
DRES DRES
H5V
COMPLETE VIEW
10 - 4
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
IC891a R893
CTCV
NJM2902V
4 47k
2 8V
1 -
3
+
11 BFO
BEEP
AFI
C883
IC891c
R882
1 9
8 - 10k
10
+
C862
BFO
0.0047
5V
T8V
IC861
BU4052BCFV
1 16
Y0 VDD
2 15
Y2 X2
3 14
Y X1
4 13
Y3 X
C1141
5 12
Y1 X0 0.47
6 11 WFAF DIN
INH X3
7 10
VEE A R861
8 9
B 2.2k
VSS
RXS
AFIE
8V
R937
10k
R953
C938
10k
100p
IC931
PC5023-077
R939 C1144 R1149
13 12
100k NC VCC 0.1 6.8k
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
19 6
BU2O BU1O 47k
20 5
BU2I BU1I
21 4 C945 1
AMPO SWI
22 3
AMP- CMPO
23 2
AMP+ CMPI
24 1
GND NC R945 R944
200k 22k
C931
2 R942 R941
D932
1k 220
DA221
MEASUREMENT CONDITIONS
SUPPLY VOLTAGE:13.8 V
14.1 MHz USB
DIGITAL MULTIMETER :50 k‰/V
14V
8V
5V
R8V
T8V
HV
H5V
2IF
IC811b
6
Q773 Q772
7 -
5 UMC1N UMC1N
+ 4 3 4
Q777
2SA1576
2
Q774
2SC4081
Q776
2SC4081
5 1 5
R781
R783 100k
47k
R828
470k
C828
IC841
100p
TA4101F
1 8
IFOUT COLECT
R829
2 7 IC811c
VCC GND 100k
3 6 9
OSCIN BASE 8 -
4 5 10
BASE BASE C851 +
100p
R1142 R1141
47k 47k
IC1141
BU4052BCFV
R1041 C1041
1 16
Y0 VDD 100 1
2 15
Y2 X2
3 14
Y X1
4 13
IC971
Y3 X
TC4W53FU
5 12
Y1 X0
6 11 1 8
INH X3
7 10 MODS MINH 2 7
VEE A
8 9 D96S 3 6
VSS B R971
4 5
10k
R981 4.4 V
10
6.3 V
4
R964 2
C963 - 1
33k
4.3 V 3
10
+
IC981a
11
C961
NJM2058M
0.47
Q961
2SC4081
3.7 V
C946
0.1
C1163 R1165 R1166
0.1 100k 330k
R946
10k
R1167
100k
C1161 R1161
13
0.47 100k - 14
12
D931
+
DA221
IC981d
R1163 R1162
15k 100k D1161
1SS385
R1164 C1162
18k 0.1
D772 R772
MA2S111 1k
R774
D771
1k
3 1SS375
C771
150p
Q771
2SC4081
2
R771
3.2 V R752
4.7k
47k
C761
0.0047
C751
1
220p
R763
R764 R761
100k
15k 1k Q751
D761
2SC4081
1SS375
C764
1.9 V
0.01
FMAF
8V
R813
10k
IC811a
R812 C812
NJM2902V
39k 0.01
4 2
1 -
3
IC811d +
11
C825 C813
R825 R824 R823
13
0.1 0.01
14 - 82k 82k 82k
12
+
R814
150k
IC1011
R1011 C1011
LC715317
100 0.0047
1 24
XIN XOUT
IFST 2 23 CP1011
CE PDB2
MCK 3 22
CL PDB1
MOT 4 21
DI AIA
5 20
LDB AOB
6 19
LDA OUTB
7 18
CA CB
8 17
TEST VDD
R1012
9 16
33k PDA2 PIB
10 15
PDA1 VSS
11 14
AIA PIA
12 13
AOA OUTA
4.4 V R1000
560
R988 R993 C988
IC981b
R995 R1001
150k 82k 0.0022
6 1.2k 68k
-
5
+
R994
82k
R1003
R991
68k
680k
R1045
Q981 RV-148
(4.7kB)
DTC114EE
Q1041
DTC114EE
9
- 8
10
+
R998
IC981c
22k
Q982
DTC114EE
D732
UMC3N
4 3
5.8 V C741 6.1 V
0.0047
2
L741 L731
LS-516 LS-516
5 1
Q731
3SK126
4.0 V
Q741
2SK882
R742 R736
47 47
IC791
TA31136FN C793
FI791 0.0047
1 16
SFPC455E-
OSCIN MIXIN
TC01 2 15
OSCOUT GND
3 14
MIXOUT N-REC
4 13
VCC N-DET C7
5 12
IFIN RSSI C7
6 11
DEC IFOUT
7 10
FILOUT QUAD
8 9
FILIN AFOUT
R795
150k
R794 C798
330k 0.01
0.8 V(FM) 6.6 V(FM)
R1018 C1020 C1023 C1027
100k 68p 150p 10p
R1022
100k
4.3 V
Q1011
D1013
2SK210
1SS375
L1014
10uH
R1019 C1024 3.4 V(FM)
2.2k 150p Q1012
DTC114EE
D1014
1SS375
R1015
47
R1052
IC1041
330
NJM1496V
1 14
VS+ VEE
L1042
2 13
R1050 330
VCS NC 100uH
3 12
VCS VO-
4 11
VS- NC
5 10
BIAS VCC-
6 9
VO+ NC
7 8
NC VCC+
R1048
C1047
820
10
D921
DAN222