Icom IC-7700 Service Manual page 87

SECTION 9 BLOCK DIAGRAM
Cutoff CONTROL
2SC522 6
Q341/Q441 2SC5226
64.485-72.454999MHz
FILSEL
AM P LPF HPF BUFF
Q220
2SK210
Q301
DTC114Ex2 Q302 VA1S
72.455-79.454999MHz
VA1S- 2S Q230
2SK210
Cutoff CONTROL VA2S
79.455-86.454999MHz
2SC5226 3SK294
Q240
2SK210
LPF BUFF AM P
VA3S
86.455-94.454999MHz
Q352
Q351
Q250
2SK210
VA4S
1LO 94.455-109.45499MHz
1LO_TO_RF
ATT HPF
(64.485 -124.455MHz)
Q260
VA1S- 6S 2SK210
VA5S
109.455-124.455MHz
MUT E T8V VCO Q270
CTRL SW 2SK210
VA6S
Q 593:DTC114E Q 280-Q285
Q592:2SB1123 DTC114Ex6
64MHz 2SC467 3
T2LO_TO_RF BPF AM P ATT
T2LO
(64MHz) Q591
FI831
Q80 1
D821
FL-356
2SK882 2SK882
HSB88WS
R2LO_TO_RF ATT AM P BPF ATT ATT AM P
R2LO
Q831
(64.491MHz) 64.491MHz
2SK882
MUT E R8V
CTRL
AM P
Q833:DTC114EU
Q811
Q832:2SB1123
Q680
0.6MHz
2SC408 1
T3LO_TO_RF ATT BUFF HPF LPF D/A
T3LO
(0.491MHz)
IC651
IC602 SC-1246A
TC7S08
MKR
(100KHz)
M KR_TO_RF_UNIT
MKRS
I C1652
SC-1246A
TC7S04
IC61
I C1651
TA78L05
AM P DDS
15V +5 5V
REG
I C1701
TC7S08F
IC51 SW 1/2 1/200
TA7808
+8 8V
REG
MKRS
100kHz
IC201
ADF4116
Q151
2SC408 1
LOOP PHAS E 10.4122038-10.4963312MHz
1/21
AM P
FIL DET
DATA/CK/STB2
Q303
2SC522 6
UNLK 1/N Q10 1
HPF AM P
(TO CPU) 2SC467 3
AM P
N=130-250
IC1 IC2
CD74HC4094 TC74HCT7007
40MHz
SERI /
HEX_BUFF
STB1- 5/STB1U PARA DATA/PST/PSL DATA/CK/PSL/PST/CN22
DATA/CK/CN22
DATA/CK/STB3/DRESL/CN22
IC501
SC-1246A
2SC522 6
ATT AMP 1/2 1/8
Q580
IC503
Q561 64.000MHz TC7S04
LOOP
PHAS E DDS
ATT HYB BUFF AMP
FIL DET
Q541
2SC522 6 2SK210
UNLK
(TO CPU)
DATA/CK/STB4/DRESL 4.5MHz
LPF D/A
4.0000000MHz
TC7S04
IC652
DDS AMP
VA1S- 6S
DATA/CK/STB5/DRESL
2SC408 1
Q1680
DACK (12.288MHz)
D/A LPF HPF BUFF AT T
DACK_TO_MAIN_UNIT(DSP)
Q1601
2SC421 5
SAD(40MHz)
LPF
BUFF
SAD_TO_SCOPE_UNIT
9 - 1
PLL UNIT
FI101
SFECV10.5MA5
CERAMIC
LPF AT T
BPF
DATA/CK/STB1/STB1U/DRESH
10.4122038-10.4963312MHz
DDS
IC101
AD995 1
Q702
Q30
10MHz
AT T BPF X4 AM P
2SC4215 2SC4081
OSC UNIT
Q 1012/Q1013
REFON
O SS1/OSS2 I/O
CTRL
REFOF F
DTC114Ex2
Q1011
RL_CTRL
DTC114E
Q1061/Q1062
2SC4081x2 10MHz
BPF
AMP BUFF
Q1070
2SC4081
RL1011
EXT-REF IN
RL1010
ATT LPF AMP
Q 1022:2SC4215
EXT-REF OU T
Q1023:DTC114E
Q1010
RL_CTRL
DTC114E
10MHz
(10MHz OCXO )
2SC4081 CR-772.
Q1021 X10
LPF AM P BUFF
10MHz Q1042:2SC421 5
Q1043:DTC114E
OCK/ODAT/OCS
CAL
I C1091
AD5260BRU50
IC10
BA12
+15V
+12_REG
MAIN UNIT
REF I/O
1 Freq=10MHz
LEVEL=-10dBm