Front Unit - Icom IC-910H Service Manual

10-3 FRONT UNIT

DISPLAY BOARD
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
Q18
DTC114TU
Q19
DTC114TU
MAIN
LED
TX/RX
CTRL
LED
MRL
MTL
Q20
DTC114TU
Q21
DTC114TU
SUB
LED
TX/RX
CTRL
LED
SRL
STL
VR-A BOARD
MAIN
MAVR
AF VR
MAIN IC9
MSVR
RF/SQL VR
TC7W04F
Q12
2SA1586 CI-V
Q13 I/F
VR-B BOARD
2SC4116
D13
1SS355
SUB
AF VR SAVR
SUB
SSVR
RF/SQL VR
RIT BOARD
RIVR
RIT VR
SHIFT VR SFVR
SEND
CTRL
Q17
2SC4116
MIC BOARD
D16
1SS355
MIC
JACK
MIUD
SEND
CTRL
Q16
2SC4116
D15
X1
JACK BOARD
1SS355 CR-636
(14.7456MHz)
PHONE IC8
JACK TC7W08F
PHIN
FUNC BOARD
KEY MATRIX BUS
FRONT FRONT
KEY KEY
MAIN SENSOR
CHASSIS UNIT
IC11
AN78L05M
+5
H5V HV
REG
-5
-5V
DC-DC
IC201
NJM2360M
D202
SB07-03C
FAN
FAN
14V
CTRL
Q22
MF1
DTA144EU
Q23 SB0812H-ICOM-00
DTA144EU
ALCL
Q24
2SB1201
Q25
2SC4116
FAN1
Q26
DTA144EU
FAN2
D17
MA8082 M
FAN3
TO MAIN UNIT
MAIN PLL
DATA BUS DATA BUS SIGNAL BUS SIGNAL BUS
MULTI
IC3 BU4052BCFV
MULTI
SIG IN SIG OUT
IC4 BU4052BCFV
CPU
IC1
A/D LINE MULTI
MC16C/62FP
IC5 BU4052BCFV
DS31
A0095
DRIVER EEPROM RESET HV
IC6 IC7
XN58X2464 S-80942ANMP-DD6
LCD
IC2
SED1540F
DRIVER
BACK LIGHT
DRIVER
Q1 DS1 - DS24
2SD1664 TLGE1002
FRONT UNIT
EP1
RMS20-250-201-1R
10 - 3
10-4 UX-910
Q81:
2SC2712
IFM AMP
10.85 MHz
A
IFS
B
10.95 MHz
C
to
MAIN
UNIT
D
E
F
MAVR
SAVR
MSVR
SSVR
MIVR
POVR
RIVR
SFVR SCLK 30.2 MHz
SMLM
SMLS
CENM
CENS
FORL
PHIN
MIUD
PDAT
PCK
IC311: TC7W08F
14LV
43LV
AVXL
VOXL
NSQM
NSQS
OVDV
VUTP
DAT
CK
12DS
IC301: BU4094
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
IC131:
µPC8163TB
IC111:
FI101:
µPC2709
D82: HSB88WS WF447B
IF
LPF ATT LPF ATT BPF ATT
AMP
243.95 MHz
1FOR
ATT
IC31: BA4558F
APC
AMP
Q38
Q36: 2SK2354 2SK2855
PRE
ATT DRIVE
ATT
DRIVE AMP
ATT
ATT
FI241
FI271:
(SAW)
IC241: LFSN30N18C1280B
243.95 MHz
UPC2721
BPF BPF
Q221:
3SK166
IC201:
µPC2709
LPF AMP ATT
LPF
DAT
CK
MAIN DAT
IC661:
IC762:
SC-1246A
TC7S04F
IC601:
TC7SU04F
Q601: 2SC4215
AMP
DDS
LPF AMP AMP
IC761: µPB1509GV
Q731: 2SC5107
D711, D712: 1SV214
LOOP
FILTER
IC701: µPC4570
IC610:
TC7W74FU
DAT
1/2 LPF
BUFF
CK
Q301: XP1113
12M
SW
12S
12PR
12DR
12C2
CNTY
TXS
12AT
12M
RXS
12M
12S
IC161: BA09T
+9
14V
REG
IC141: FI1:
FI141:
µPC1878G
LFSN30N18C1280B LFSN30N18C1280B
YGR
BPF LPF ATT ATT BPF
AMP
IC1
IC2
:
12PR
PRE
PA HVR
CTRL
AMP LPF
POWER
LPF Q71: 2SD1801
DET
Q72: DTC144EU
IC21:
Q73: 2SC2712
M57762-02 D502: HSU88
Q74: 2SC2712
D503: HSU88
1TX9
IC181:
µPC2709
1LO: 996-1076.1 MHz
LO
LPF ATT
AMP
12AT
Q282: 2SC2712
SW
Q271: FI281:
Q281:
2SC5454 LFSN30N18C1280B NE34018
RF
RF
BPF HPF
AMP AMP
IC502: TC7W66PU
Q511: 2SK880 Q551:
Q512: 2SC4116 Q541: 2SC5508
2SC5107
Q542: 2SC5193
LOOP
BUFF BPF HPF
FIL
IC501:
TB31242
Q681: 2SC5107
PLL AMP
15.1 MHz
Q761:
2SC5107
1/8 BUFF
ATT
AMP
2LO
MAIN: 233.0 MHz - 233.15 MHz
Q741: SUB: 232.95 MHz - 233.05 MHz
2SC5107
ATT
Q171: RN2425
D168: MA2S111
T+5
T+5
CTRL
Q166: 2SB1133
Q168: 2SC2712
D166: 1SS355
T9V
1TX9
REG
Q165: XP4315
Q167: DTA144EU
REG
CTRL
Q170: 2SB1132
R9V
1RX9
REG
Q169: XP4315
D167: DAN222
REG
CTRL
Q172: RN2425
D169: MA2S111
R+5
R+5
CTRL
IC162: TA7805F
+5
+5
REG
+9