Icom IC-91A Service Manual page 43

SECTION 11 BLOCK DIAGRAM
Q600: 2SB1132
Q601: XP1501 MAINR3 MAINR3, MAINR3A, MAINR3B
REG
Q604: XP1115
IC701: CD4094
DAFS, ACT, BCT, W/N, R3C
DATA, CK, IOSTB3 I/O
AR3C, BR3C, AAFS
IC702: CD4094
VBVCOC, UBVCOC, WFM, IFC
DATA, CK, IOSTB2 I/O
300M800MC, AAM, BAM, VBUAC
Q104: XP6501
Q105: UNR9115
Q104: XP6501
AM
AGC
DET DET
Explanatory notes
Q550: XP6501
TX LINE
Q552: 2SC4081 IC500B: CD4066
RX LINE
AF MODE
FIL SW
COMMON LINE
IC150: NJM12904
IC703: CD4066
Q150: UNR9115
TONE TONE
SEL FIL
J700
Q203: XP6501
Q204: UNR9115
Q203: XP6501
AGC AM
J701
DET DET
+3V
IC250: NJM12904
Q250: UNR9115
TONE
FIL
IC501: NJM12904 IC700C: CD4066
Q500: UNR9215 IC700D: CD4066
AF MODE
FIL SW
SP
IC550: NJM2070
IC303: M62364FP
AF DATA, CK, DASTB2
D/A
AMP
IC300B: NJM2115
IC101: AMBE-2020
BUFF
IC304: CD4066
Q308: UNR9115
AF6V
REG MODE
SW
BUFF BUFF
Q105: 2SB1132
Q106: XP1501
IC302D: LMV324 IC301: NJM2115
UT-121 (Optional Product ; CODEC UNIT for IC-91AD)
Q602: 2SB1132
Q603: XP1501
RFR3
Q800: XP1115
REG
Q801: UNR9115
Q803: 2SB1132
Q804: 2SD2216
D800: MA2S728
Q650: UNR9211
D801: MA2S111
Q651: XP1501
Q652: 2SB1132
VCO3V
REG
T6
REG
IC700A: CD4066
IC700B: CD4066
S-LV
SEL
Q103: XP6501 FI100: CFWM450E
CERAMIC
Q802: 2SK880
IF
BPF
AMP
LEVEL
CONV
MODE MODE
D103: 1SS364 D102: 1SS364
SW
SW
IC100: TA31136 D3: 1SS364 FI1: FL-394
IF
FM FM AMP MODE XTAL
MUTE DET SW
BPF
Q100: 2SC4215
IC500A: CD4066 D100: MA2S728
Q101: UNR9215
Q2: 2SC5006
Q102: XP1115
CERAMIC
BPF
MODE
DISCRI
SW
FI2: SFECV13.35MAS
X100: CDBCB450KCAY24
FI50: FL-335
XTAL
Q202: XP6501 FI200: CFWM450E
BPF
CERAMIC
IF
BPF
AMP
Q453: XP4315
D450: 1SS364 Q452: 2SC4215
FI201: CFWKA450KHFA
Q200: 2SC4215 MODE
X4
CERAMIC
D200: MA2S728 SW
BPF
Q451: 2SC4215
MODE MODE
SW SW
X3
D203: 1SS364
D202: 1SS364
IF
AMP
Q450: 2SC4215
FM FM
MUTE DET
BUFF
IC500D: CD4066 IC200: TA31136
Q201: 2SC4081
MODE
DISCRI
IC400: MB15E03
SW
15.3MHz
X450: CR-826
PLL
X200: CDBCB450KCAY24
IC
+3V
S702
A
C
B
MAIN UNIT
TP76D96E20
IC300A: NJM2115
IC350: AD73311
BUFF
LINEAR
CODEC
Q100: 2SC4081 16.384MHz
X100: CR-820
AMP
BUFF
IC102: SN74LVC1G04
IC1: R1111N321 IC560: XC6202P502
C5V VCC
3.2V 5V
3.2V
REG REG
Q50: 2SA1362
Q51: XP1501
DSP
CODEC 3.3V
+3D
REG
Q1: 2SA1362
CLONE
Q2: UNR9215
+5V
5V Q50: 2SD2216
SW
D50: MA2S111
D51: MA2S111
MODEM
IC202: CMX589
IC203: SN74AHC1G66
IC302B: LMV324
Q200: UNR9215
Q202: 2SC4081 Q304: UNR9115
Q201: UNR9215
Q305: UNR9215
IC302C: LMV324 Q306: UNR9215
1/2 AMP
9.8304MHz LPF IDC
IC201: SN74AHC2G74 X200: CR-821
Q307: UNR9215
LPF
11 - 1
Q1: 2SC5195
BC: 62.145-131.645MHz
Q2: UNR9211
D1: 1SV325
D2: 1SV308 Q200: 2SC5006
D3: 1SV325 D4: 1SS400
D5: 1SV325 D53: 1SS400
D6: 1SV325 D103: 1SS400
1
Q105: XP4315
VCO BUFF
D100: 1SV308
BC BAND
Q201: 2SC5006 D850: 1SV308
Q51: 2SC5195
LO
Q52: UNR9211 TX/RX
D51: HVC376B AMP SW
D52: MA2S077
D54: 1SV325
D55: 1SV286
2
VCO
VHF BAND
Q202: 2SC5006
Q101: 2SC5006
Q102: UNR9211
BUFF X2
D100: 1SV286
D101: HVC375B
D102: MA2S077
Q850: 2SC5006
D104: HVC375B V: 131.350-235.645MHz
3
VCO UNIT
VCO
UHF BAND
U: 319.175-538.345MHz
IC800: LMX2313
LOOP PLL
FIL IC
D203: 1SV308
IC900: µPC2757
RF
SW
D256: 1SV308
RF
SW
D2: 1SS364
MODE
D707: 1SV308
SW
RF
SW
Q1: 2SC4081
IF
Q301: 2SC5006
AMP
D311: 1SV308 D310: MA2S728
RF
SW
D509: 1SV308
RF
SW
D454: 1SV308
IC50: µPC2757 RF
SW
V: 164.350-220.350MHz
Q300: UNR9115
Q301: 2SC5195
D300: 1SV325 Q353: 2SC5006
D301: HVC376B D351: MA132
BUFF
VCO
D606: 1SV308
RF
Q350: UNR9115
SW
Q351: 2SC5195
D350: HVC375B
D352: HVC375B
LOOP D655: 1SV308
VCO
FIL
RF
SW
U: 333.650-426.345MHz
D706: 1SV308
SQL
PTT
RF
SW
S700
SKHLLFA010
S701
SKHLLFA010
DC-DC +3V
IC101: XC6371A551PR
D101: RB551
IC52: MAX3221
J50
IC50: CD4066
Q52: UNR9115
Q309: UNR9215 RTEMP
TEMP
DTMF
TTEMP
LPF
Q300: UNR9115
Q302: 2SC4081
MC300 Q303: 2SB1462
MODE MIC
SW AMP
IC301: SN74AHC2G53 EM-140
IC300: AN6123
ALC TX
CTCOUT AMP SW
Q301: UNR9215
RF UNIT
IC100: µPC2762
Q104: UNR9215 Q102: 2SC4226 Q101: RD01MUS1 Q100: 2SK3476
PRE DRIVE PWR
AMP
ATT
DRIVE AMP AMP
TEMP
+3V TTEMP
APC
DET
I_DET
CTRL
D101: MA132
Q150: XP6401 IC150: NJM3404
Q151: UNR9215
Q200: 2SC4215
D202: MA2S728 D201: MA2S077
RF
RF
LPF LPF
AMP
SW
D254: MA2S077 Q250: 2SC5006 D251: MA2S077
D255: 1SV325 D253: MA2S111 D252: 1SV325 D250: MA2S077
RF
RF
BPF BPF
AMP SW
D303: MA2S077
RF
HPF
SW
D306: MA2S077
D307: HVC375B
D308: HVC375B Q300: 2SC5006 D304: MA2S077
D309: MA2S077 D310: MA2S728 D305: HVC375B D301: MA2S077
RF
RF RF
BPF BPF LPF
AMP AMP SW
D402: HVC376B Q401: 3SK318
D405: 1SV308 D403: HVC376B D404: MA2S111 D401: HVC376B Q400: 3SK318
RF RF
RF
BPF BPF
SW AMP AMP
D451: HVC376B Q450: 3SK318
D452: HVC376B D453: MA2S111 D450: HVC376B
RF
BPF BPF
AMP
D504: MA2S077
D505: HVC375B
Q501: 2SC5006 Q500: 2SC5006 D501: MA2S077
D506: HVC375B
D508: 1SV308
D503: MA2S111 D507: MA2S077 D503: MA2S111 D502: HVC375B
RF RF
RF
BPF BPF
SW AMP AMP
D604: HVC376B
Q601: 3SK318 D601: HVC376B
D605: HVC376B
D603: MA2S111 D602: HVC376B Q600: 3SK318
RF RF
BPF BPF HPF
AMP AMP
D653: HVC376B
Q651: 3SK318 D650: HVC376B
D654: HVC376B
D652: MA2S111 D651: HVC376B
RF
BPF BPF
AMP
Q701: 2SC5006 D703: HVC375B Q700: 2SC5624
D705: MA2S111 D704: HVC375B D705: MA2S111 D702: HVC375B D701: 1SS362
RF RF
BPF BPF ATT
AMP AMP
Q51: 2SD2216
D52: MA2S111 HV
+3V
DET
D103: MA2S077 12.288MHz
X1: CR-774
CLK
SHIFT
RESET
VIN
CHGH, CHGC
RX232 Q200: UNR9215
Q201: UNR9215
RS
DS201: CL-165HR
232C TX232
D201: MA2S111
CPU
T-R
IC1: HD64F2238 LIGHT
TEMP
SEL
IC2: SN74AHC1G08
PCON
PTT
DET
LCD MATRIX KEYBOARD EEPROM
IC51: 24LC512
Q1: UNR9211
ANT
Q2: XP1114
Q3: UNR9215
J1
D1: 1SV307
D2: 1SV307
D3: 1SV271
D4: 1SV271
ANT
HPF HPF LPF
SW
Q1: UNR9211
Q2: XP1114
Q4: UNR9215
D3: 1SV271
D4: 1SV271
D8: 1SV308
ANT
LPF LPF
SW
D10: 1SS362
ATT HPF
D200: 1SV308
RF
SW
D7: 1SS362
ATT
IC952: TC75S51
IC953: TC75S51
IC954: TC75S51
D302: 1SV308 IC955: TC75S51
+5.5V
RF LEVEL
TUNE
SW CONV
TUNEA1, A2, B1, B2
D300: 1SV308
RF
SW
IC950: M62366
DATA, CK, DASTB1
D/A
D400: 1SV308
REFC, PSET, DSET
B2C, VSHIFT, ATT
RF UHFC, VHFC
SW TUNEA1, A2, B1, B2
IC951: CD4094
I/O DATA, CK, IOSTB1
VAVCOC
UAVCOC, BCVCOC, BCC, 50MC
B1C, 80MC, VAUBC
D500: 1SV308
Q201: UNR9115
Q251: XP1115
RF Q302: UNR9115
SW Q303: UNR9115
Q304: UNR9215
Q451: XP1115
RF3V Q452: XP1115
SEL Q652: XP1115
D600: 1SV308
Q702: XP1115
Q703: UNR9115
RF Q704: UNR9215
SW Q900: UNR9215
Q1000: HAT1026
D1000: MA2S728
D1001: RB060
HV
DC
VCC
SW
J1000
D700: 1SV308
TO battery
RF
SW
Q150: 2SA1362
+3CPU
Q151: 2SB1201
+3 CPU3 VDET Q152: UNR9211
CHG
REG REG SEL Q153: XP1501
D150: MA133
D152: SB07-03C
Q100: 2SB1132 IC100: R1150H022 IC50: CD4066
Q101: XP1501 Q53: UNR9115
D100: MA2S111
Q202: 2SB1132
Q203: XP1501
LCD
LED3 DS210: SML-A12MT
REG LIGHT DS211: SML-A12MT
POWER
RX232
KEY
DS202-DS209:
LIGHT SML-512MW
LOGIC UNIT