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
MAIN
Q12
DATA BUS
2SA1586 CI-V
Q13 I/F
VR-B BOARD 2SC4116
D13
1SS355
SUB
SAVR
AF VR
SUB
RF/SQL VR SSVR
RIT BOARD
RIT VR RIVR
SFVR
SHIFT VR
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
DTA144EU MF1
SB0812H-ICOM-00
Q23
DTA144EU
ALCL
Q24
2SB1201
Q25
2SC4116
FAN1
Q26
DTA144EU
FAN2 D17
MA8082 M
FAN3
MAVR
TO MAIN UNIT SAVR
PLL
MSVR
DATA BUS SIGNAL BUS SIGNAL BUS
SSVR
MULTI
MIVR
POVR
RIVR
SFVR
IC3 BU4052BCFV
SMLM
SMLS
CENM
MULTI
CENS
FORL
PHIN
MIUD
SIG IN SIG OUT
IC4 BU4052BCFV
14LV
CPU
43LV
AVXL
IC1
VOXL
MC16C/62FP A/D LINE MULTI
NSQM
NSQS
OVDV
VUTP
IC5 BU4052BCFV
DS31
A0095
RESET HV
DRIVER EEPROM
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
From The N3UJJ.COM Document Library From The N3UJJ.COM Document Library
10-4 UX-910
Q81:
2SC2712 D82: HSB88WS
IFM AMP LPF
10.85 MHz
ATT
A
IFS
B 10.95 MHz
C
to
MAIN
UNIT
D
E
F
Q601: 2SC4215
SCLK 30.2 MHz
LPF
PDAT DAT
BUFF
PCK CK
IC311: TC7W08F
DAT
CK
12DS
IC301: BU4094
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
IC131:
µPC8163TB
IC111: FI101: FI141:
µPC2709
WF447B LFSN30N18C1280B
IF
ATT LPF ATT BPF ATT BPF LPF
AMP
243.95 MHz
1FOR
IC31: BA4558F
IC1
APC
IC2
AMP
Q38 :
Q36: 2SK2354 2SK2855
PA
ATT PRE DRIVE
ATT AMP
DRIVE AMP
IC21:
M57762-02
LPF
ATT
ATT
FI241
FI271:
(SAW) Q271:
LFSN30N18C1280B
243.95 MHz IC241: 2SC5454
UPC2721
RF
BPF BPF
AMP
Q221:
3SK166
IC502: TC7W66PU
Q511: 2SK880
IC201:
Q512: 2SC4116 Q541: 2SC5508
µPC2709
Q542: 2SC5193
LOOP
LPF AMP ATT
FIL
LPF
DAT
CK
MAIN DAT
IC661:
SC-1246A IC762:
Q761:
TC7S04F 2SC5107
IC601:
TC7SU04F
AMP BUFF
1/8
DDS
AMP AMP
IC761: µPB1509GV
Q731: 2SC5107
D711, D712: 1SV214
LOOP
AMP
FILTER 2LO
MAIN: 233.0 MHz - 233.15 MHz
IC701: µPC4570 Q741: SUB: 232.95 MHz - 233.05 MHz
2SC5107
IC610:
TC7W74FU
1/2 LPF ATT
Q171: RN2425
D168: MA2S111
T+5
CTRL
Q166: 2SB1133
Q301: XP1113
Q168: 2SC2712
12M
D166: 1SS355
SW
12S
T9V
REG
12PR
12DR
Q165: XP4315
12C2
Q167: DTA144EU
CNTY
TXS
REG
12AT
CTRL
12M
Q170: 2SB1132
R9V
REG
Q169: XP4315
D167: DAN222
RXS
REG
12M
CTRL
12S
Q172: RN2425
D169: MA2S111
R+5
CTRL
IC161: BA09T IC162: TA7805F
+9 +5
14V
REG REG
IC141: FI1:
µPC1878G
LFSN30N18C1280B
YGR
ATT ATT BPF
AMP
12PR
PRE
HVR
CTRL
LPF
POWER
LPF Q71: 2SD1801
DET
Q72: DTC144EU
Q73: 2SC2712
D502: HSU88
Q74: 2SC2712
D503: HSU88
1TX9
IC181:
µPC2709
LO 1LO: 996-1076.1 MHz
ATT
AMP
12AT
Q282: 2SC2712
SW
FI281:
Q281:
LFSN30N18C1280B
NE34018
RF
HPF
BPF
AMP
Q551:
2SC5107
BUFF BPF HPF
IC501:
TB31242 Q681: 2SC5107
PLL AMP
15.1 MHz
ATT
T+5
1TX9
1RX9
R+5
+5
+9