Icom IC-V8 Service Manual

11 - 1
SECTION 11 BLOCK DIAGRAM
ANT
D1: MA77
D2: MA77
D8: MA77
VCC
Q1:2SK3476
VCCT5
Q3: 2SC5085
Q2:2SK3475
D3: MA77
D4: MA77
VCO5
Q4: 2SC4406
VCO5
Q6: 2SC4406
R5
Q50: UMX5
VCO
D38: HVU350B
Q51: DTC144EU
D37: MA2S077
VCO
SHIFT
Q59: 2SC4116
REF.
OSC
IC1:
LV2105V
X1: CR-659
21.250 MHz
FRQCON
OPTIONAL
UNIT
J5
MIC, AF, PTT
S801
TP70N00E2015
DICK
DIUD
DTC
DTC
21.250 MHz
DEV
FC
FC
D7:
HVC376B
REF.
ADJ.
X3: CDBCA450CX24
Q58:
XP4601
LOOP
SW
VCO5
SW5V
Q5: 2SC4406
Q34: 2SK1069
DC
AMP
TXC
D32: RB706F
D33: RB706F
PWR
DET
PS5
IC3A: NJM12902
Q37 : DTA144EU
D50: MA728
LIMIT
SW5V
T1 T3
IC10 (1–3)
M62363FP
D9 : HVU350B
T2, T3
Q12: 3SK274
R5
D11: HVU350B
D12: HVU350B
21.700 MHz
Q13: 3SK274
FI3: FL-298
FI1: FL-298
R5
LVIN
SD
NOIS
Q14: 2SC4406
IC2: TA31136FN
MIX, NOISE AMP
IF AMP, FM DET
S DET, OSC
SQL SW, AF FIL
CTCSS
DET
DET
LPFOUT
SQLIN
SW5V
IC10 (5, 6, 7, 8)
M62363FP
FI2: SFPC450E
PTT
PTT
SELECT
D
PTT
CONT
MC1: KUC3523
Q17: UN911F
PTT
OPT
MIC
J2: HSJ1122
MIC JACK
SW5V
VCC
SELECT
OPTION
F
450 kHz
AF1
IC3B:NJM12902
DET
Q53: XP4601
TONE
FIL
NOIS
SD
X2: CR-663
9.2 MHz
Q43: DTC144EU
CLOCK
SHIFT
CSHIFT
CPU
IC8: HD6433876B49H
CTCC
SW5V
TEMP
TEMP.
SENS.
MMUT
CTCSS
Q38: DTC144EU
DTCS
SW
IC3D: NJM12902
AF2
/MOD2
MIC
AMP
RMUT
ANALOG SWICH
MOD1
MOD3
ENPHA
PRE
IC3C: NJM12902
C
IC5: TA7368F
MIC
SELECT
Q15: 2SB1132
Q16: XP6501
AF
REG
IC10 (4): M62363FP
AFON
J3: HSJ1456
SP JACK
SP1: SDRS-3650P
CHASSIS UNIT
CLONE
SP
AFOUT
T5
Q22: 2SA1576
T5
REG
T5C
Q31: DTC144TU
D27: RB706F
R5 PS5
Q21: 2SA1576
R5
REG
Q54: 2SA1576
PS5
REG
PS5C R5C
SW5V
VCO5
Q11: XP4601
VCO5
REG
PSVCO
DUSE
TONE
LEDC
IC7: BR24C16FV
EEPROM
INITIAL/KEY MATRIX
D40–D49: MA2S111
R349: 100k
COMMON LINE
TX LINE
RX LINE
DATA
IC11: S-80942
RESET
VCC
DS2: LNJ310M6URA
DS3: LNJ310M6URA
Q25: 2SC4116
LED
SW
Q56: UN9213
SW5
CONT
PCON
Q55: 2SB1132
Q57: XP1501
SW5
REG
D39: MA2S111
IC12: S-81350
CPU5
REG
BATT
GND
VCC
D/A
UP
E
DN
MIC
PLL
IC
LOOP
FIL
LO
AMP
BUFF
LPF
BUFF
TX/RX
SW
LPF
PRE
DRIVE
DRIVE
AMP
PWR
AMP
APC
CTRL
LPF
ANT
SW
LPF
D/A
BPF
RF
AMP
BPF
BPF
IF
AMP
CERAMIC
BPF
AF
AMP
BUFF
D/A
HPF
LPF
LPF
LCD
HPF
MAIN UNIT

Icom IC-V8 Specifications

General

Frequency Range	136-174 MHz
Power Output	5.5 W
Mode	FM
Receiver Sensitivity	0.16 μV (12dB SINAD)
Channel Spacing	12.5/25 kHz
Voltage	7.2 V DC