Main Unit; Pa And Pll Units - Icom IC-910H Service Manual

10-2 PA AND PLL UNITS

Q511 2SK1740
Q512 2SK1740
G
to
MAIN
UNIT
LPF
H
DRIVER
VR9V
Q505
Q501
DTC144EU
2SK302
Q506
Q502
DTC144EU
2SK302
Q508
D502
DTC144EU
1SV286
Q21 VTU2
XP4312
VT9V
BUFF VUMS
Q1
2SK302
Q2
2SK302
LPF
UT9V
Q30 DTC144EU
UR9V Q32 DTC144EU
DRIVER
Q33 DTC144EU
I
LPF
to
MAIN
UNIT
J
Q11
2SK508
IC501
TA7805F
Q181
+5
14V 5V
2SD2345
REG
D181
1SS355
RIPPLE
9V
FIL
Q381
2SD2345
D381
1SS355
RIPPLE
FIL
Q153
DTC114EU
UNLOCK
14UL
DET
from DISPLAY BOARD
IC1
BU4094BCF
DRIVER
Q154
DTC144EU
UNLOCK
43UL
DET
HPF
IC502
µPC2710
LO
LPF HPF ATT LPF A1LO
ATT
AMP
D503
1SV286
D504
IC501
1SV286 µPC2709
YGR
ATT BPF ATT
AMP
FI200
LFSC25N 12B 0440B
FI201 IC200
µPC2710
VTU1 LFSC25N 12B 0440B
YGR
BPF ATT
AMP
ATT
Q3 D190
2SC2714 HSB88WS
RF FILTER
BPF ATT LPF
AMP
CTRL
BAND
Q202 XP4312
Q203 DTC114EU
HPF LPF HPF
IC40
µPC2709
LO
BPF ATT B2LO B1LO ATT
AMP
FI280
FL-131
XTAL
BPF
Q281
XP4312
UR9V
DRIVER
FI281
FL-130
XTAL
Q282
BPF
XP4312
DRIVER
Q192
IC161B
µPC4570
2SC5107
14LV BUFF BUFF
Q191
2SK1577
D191
Q161
MA357
DTA144EU
D192
MA357
KICK D193
MA357
D194
MA357
IC161A
µPC4570
LOOP
FIL
IC131 Q271 IC271 Q272
µPB1509GV
SC-1246A 2SC4081 2SC5107
DDS BUFF
AMP 1/8
BUFF
Q261
2SC4081
Q392
2SC5107
IC12B
µPC4570
BUFF LPF
Q391
2SK1577
43LV BUFF
D391
MA357
D392
MA357
Q361 D393
KICK
DTA144EU MA357
D394
MA357
IC12A
LOOP
µPC4570
FIL
Q471 IC471 Q472
µPB1509GV
2SC5107 2SC5107
DDS AMP 1/8 BUFF
IC331
SC-1246A
Q507
3SK177
PRE
BPF
AMP
D510
1SV217
D511
1SV217
VTU1 D512
1SV217
VTU1
BPF
D641 1SV286
D642 1SV286
FI202
LFSC25N 12B 0440B
LPF BPF
ATT
Q200
2SC3357
ATT
YGR
LPF
AMP
LPF
IC240
µPC2710
LO
LPF LPF ATT LPF LPF HPF
AMP
Q220
2SC3356
Q221
2SC3356
PA UNIT
PLL UNIT
BFOS ATT LPF HPF
BFOM ATT LPF HPF
to UX-910
30.2 MHz
D513 D514 D515
1SV217 HSM88AS 1SV237
BPF LIMIT
ATT
Q651 RL700
2SC5125 AE5349
Q652
D710
Q510
VT9V
VTU2 2SC5125 1SV265
DTC144EU
DRIVER
VATT
Q515
PWR TX/RX
2SC2712
AMP
SW
Q658 Q700
Q650
CPH3404 XP4312
2SD1585
D650
MA29B
SW DRIVER
D651
MA29B
D680
1SS301
VT9V
BIAS
VCC
UT9V
Q180
XP4312
DRV
LPF SW DRIVER
BOARD
Q131 Q656
Q930
CPH3404
Q101 Q121 SRFJ7044
2SK2975
2SK2854 2SK2973
RF RF PRE DRIVE PWR TX/RX
HPF
AMP AMP DRIVE AMP
AMP SW
Q151
D182
2SC3102
XB15A407
Q152
D183
2SC3102
XB15A407
IC
D184
VCC
DET
XB15A407
D185
XB15A407
D265
D260
ICH
MA4FH224
1SV286
ICL D266
D261
MA4FH224
1SV286
D262 Q260 D263 D264
1SV286 3SK177 1SV286 1SV237
PRE
BPF BPF ATT
AMP
Q261
UTU1 UTU2 UT9V
2SC2712
UATT DRIVER
D80
1SS301
LPF ATT A1LO
125.15 MHz - 163.15 MHz
LPF ATT B1LO
348.75 MHz - 408.75 MHz
X512
CR-452
(30.2 MHz)
Q501
2SC4081
OPTION AMP
CR-293
R570
RV-148
IC701 Q702
SC-1287 2SC4081
DDS AMP
IC601 Q602 Q551
SC-1287 2SC4081 2SC5107
DDS AMP x2 BPF ATT LPF
Q541
2SC4081
OSC BUFF
10 - 2
144 MHz
D720
HSU88
D721
HSU88
SWR
LPF
DET
PREAMP
VT9V VPRE
SW
Q182
2SB1132
Q183
IC701
DTC114EU
PQ20VZ51
REG
PAHV
430 MHz
PREAMP
UT9V UPRE
SW
D180
HSU88 Q702
2SB1132
D181
HSU88 Q703
DTC114EU
SWR
LPF
DET
FOR
REF
VCC DC INPUT
F300
FGB 4A
HV
RL300
ALD112
14V
POWS
DRIVER
CHASSIS
Q300
DTC114EU
UNIT
D303
DAN202U
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
B2LO
60.4 MHz