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ic-2730A
Service manual
Block Diagram - Icom IC-2730A Service Manual
Dual band transceiver
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:
Instruction manual
(96 pages)
,
Instruction manual
(10 pages)
,
Programming manual
(2 pages)
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SECTION 9.
BLOCK DIAGRAM
Q232
Q226
Q229/Q230/Q231
Q227
D236
8V
RIPPLE
VCO
FIL
SW
D223
D224
D227
R_UHF
D229
Q221
IC207/Q222
Q233
Q228
LOOP
R_LV
BUFF
FIL
D225
D226
D230
R_VCOSHIFT
R_VHF
RVCO
R_PLLSW
X201
R_REF
IC206
15.3MHz
PLL
Q220
IC
X3
Q206
Q208/Q209/Q212
Q210
Q205
8V
RIPPLE
VCO
FIL
SW
D201
D202
D205
L_UHF
Q201
IC202/Q202
Q211
Q207
LOOP
L_LV
BUFF
FIL
D342
D203
D204
L_VCOSHIFT
D206
L_VHF
D228
L_PLLSW
LVCO
X200
L_REF
IC201
Q200
12.8MHz
PLL
IC
X3
L_WXALT
WXALT
L_AGC
FIL
Q126
L_AMC
L_DTCSIN
CTCSS
FIL
R_WXALT
WXALT
R_AGC
FIL
Q125
R_AMC
R_DTCSIN
CTCSS
FIL
Q235/
D231/D233
UT8
400-470MHz
BUFF
Q238
D234/D235
Q37
AMP
SW
AMP
HPF
Q236/D232
BUFF
LPF
LPF
LPF
Q234
164.35-220.35MHz
BUFF
328.65-503.65MHz
137-174MHz
Q214/
D207/D209
Q240
D50/D212/D213
TX/RX
BUFF
AMP
LPF
SW
Q215/D208
LPF
BUFF
IC102
Q213
IC123
D/A
L_SQL
SQL
BUFF
AMP
L_RSSI
38.4MHz
IC119
IC121
AM
DET OUT
IF IC
SELECT
FM
Q138/D114/D118/
D116
Q132/Q134
X102
AGC
WIDE/NARROW
AMP
SELECTOR
Q118/Q120/Q122/Q124
Q128/Q142/Q147
Q130
D107/D108/D111/D112
MODE
SW
CERAMIC
CERAMIC
BPF
BPF
FI102
FI103
IC102
IC122
D/A
R_SQL
SQL
AMP
R_RSSI
45.9MHz
IC119
IC120
AM
DET OUT
IF IC
SELECT
FM
Q137/D115/D117/
D113
Q131/Q133
X101
AGC
WIDE/NARROW
AMP
SELECTOR
Q117/Q119/Q121/Q123
Q127/Q141/Q148
Q129
D105/D106/D109/D110
MODE
SW
CERAMIC
CERAMIC
BPF
BPF
FI100
FI101
9-1
Q38
D55
Q41
DRIVE
DRIVE
ATT
HPF
LIMITER
LPF
AMP
PRE
VT8
Q36
D53
Q40
DRIVE
DRIVE
ATT
LIMITER
PRE
AMP
156.85-212.85MHz
Q145
336.15-511.15MHz
LBPF4
Q143
L_R5
D121/D122
D12/D16/D91/D92
RX
SW
FI105
Q146
IF
XTAL
AMP
BPF
38.85MHz
LIF
D119/D120
D11/D15/D89/D90
RX
SW
Q144
R_R5
FI104
IF
XTAL
AMP
BPF
Q117/Q118/Q119/Q120
46.35MHz
5VS
R5
CTRL
RIF
R_R5C
L_R5C
Q1/Q2/Q5/Q6
Q10/Q11/Q14/Q15
Q21/Q22
5VS
8VS
ATT
R8
CTRL
CTRL
RATTC
RATT
R_UR5C
LATTC
LATT
L_UR5C
R_VR5C
L_VR5C
5VS
FUNC
TXMUTE
DA_DATA
DA_DATA
IC1
RATTC,LATTC
IC102
DA_CK
DA_CK
RBPF1-4
DA_STB2
DA_STB1
LBPF1-4
D/A
D/A
HV
IC4
D62/D67
PWR
PWR
400-470MHz
ATT
LPF
AMP
DET
HV
IC3
D59/D63
PWR
PWR
137-174MHz
ATT
LPF
AMP
DET
8V
PCON(V/U)
APC
CTRL
TX_MUTE)
IC2/Q46/Q48
L_AGC
L_VR8
D20/D87
Q20/D3
D28/D88
D34
RF
BPF
BPF
ATT
AMP
R_VR8/L_VR8
LBPF3
LBPF2
LBPF1
LATT
RF
R_AGC
R_VR8
AMP
Q24/D37/D38
D19/D86
Q19/D1
D27/D85
D33
RF
BPF
BPF
ATT
AMP
RBPF4
RBPF3
RBPF2
RBPF1
RATT
L_AGC
L_UR8
Q18/D4
D22/D24/D26/D30
D32
RF
BPF
BPF
ATT
AMP
R_UR8/L_UR8
LATT
LBPF4
LBPF3
LBPF2
LBPF1
RF
AMP
R_AGC
R_UR8
Q23/D35/D36
Q17/D2
D21/D23/D25/D29
D31
RF
BPF
BPF
ATT
AMP
RBPF4
RBPF3
RATT
RBPF2
RBPF1
R_R5
L_R5
FANHV
FANC
FAN
CTRL
R_UR8
L_UR8
Q29/Q30/D49
R_VR8
L_VR8
PCON_V
PCON_U
L_REF
R_REF
ANTENNA
D68/D73/
D84/D75
375-550MHz
118-550MHz
TX/RX
HPF
LPF
SW
D66/D69
D70/D71/D77
118-174MHz
TX/RX
LPF
SW
D81
D79
LIMITER
LIMITER
118-174MHz
375-550MHz
MF1
CHASSIS UNIT
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