Icom IC-9700 Service Manual Addendum page 48

(Replacement page)
June 2019
SECTION 9 BLOCK DIAGRAM
IC51
CURRENT
PHV
DET
IDLP
F2
1 2
DC13.8V HV
Q31
14V
PWRS
FI431 IC421
12RIF IF
BPF
AMP
fc=251MHz
Fc:351MHz BW:90MHz
Q423
5V
SW
12RXS
12TIF
IC271
DAT12, CLK12, LE12, ULKL12, CE12
12LOB
PLL
196.608MHz 12LOA
DCREF ATT
IC301
5V 3R3V
REG
HPF
12LOA:1605.632MHz
URRF
HPF
fc=390MHz
Explanatory notes
CONTROL Line
COMMON Line
TX Line
RX Line
Voltage Line (HV)
Voltage Line (14V)
fc=800MHz IC332
IC361
RF:1240~1300MHz RF
HPF LPF HPF
SW
fc=451MHz
12POFS
12PONS
ATT
12LOB:929MHz
HPF LPF
IC231
HPF LPF LPF
fc=1320MHz
5V
LPF ATT
12TXS
The underlined parts have been updated from the addendum of the previous version, or from the original page.
FI1191 Q1181 IC1161
RF PRE
BPF BPF
AMP AMP
fc=440MHz fc=440MHz
UPONS
IC1162
5V
REG
URXS
UHF_RX
PHV
P8V
IC101 Q201
430~450MHz PRE DRIVE
UTRF
ATT
DRIVE AMP
Q111 IC211
5V
SW UDIDV BIAS
UTXS
UHF_TX
PA-B UNIT
IC331 FI321 IC321
P.ON
RF PRE
BPF
SW AMP
P.OFF
ATT
12POFS
Q321
12PONS
12ATONS
5V
SW
12RXS
1200_RX
1240~1320MHz
IC191 IC141
YGR PRE
HPF LPF ATT
AMP DRIVE
fc=1200MHz fc=1320MHz
Q195
SW
12DIDV
1200_TX
12FIDV
PA-C UNIT
9-1a
D1121~D1124
ATT/ 430~450MHz
BPF HPF
MUTE
fc=350MHz
UATONS
UTXS
D401~D407
TX/RX
SW
Q401~Q403
UTXS BIAS
14V
Q301
PWR
UEPS
AMP
UEPL
IC211
UFIDV BIAS
HEAT
UTHML
SENSOR
IC51,Q51,Q52
RELAY
12TXS
CTRL
D326
1240~1300MHz
ATT HPF
fc=900MHz
RL51
TX/RX
SW
PHV
P8V
14V
12EPS
12EPL
Q101 Q81
DRIVE PWR
LPF
AMP AMP
IC131
BIAS
IC131
HEAT
12THML
SENSOR
BIAS
IC691
UFORL BUFF
UHF ANT
IC691
UREFL BUFF
D501,D511
SWR
LPF
DET
Q701,Q702
PREAMP
SW
IC20
12FORL BUFF
1200 ANT
IC20
12REFL BUFF
D801,D811
SWR
DET
Q1,Q2
PREAMP
SW