Icom IC-208H Service Manual page 48

MAIN UNIT (2)
BUS LINE1
HV_I
HV_I
HV
HV
8V
8V
5VS_W
5VS_W
5VS
5VS
J1
V_LV V_LV
V_VCO8 V_VCO8
VCO_SHIFT VCO_SHIFT
U_LV U_LV
GND GND
MMUTE MMUTE MMUTE
MOD MOD
GND GND
U_VCO8 U_VCO8
8V 8V
Q4
2SC4116
Q6
UMG9N
V_VCO 1 5
2
U_VCO
3 4
Q8
XP1115
1 5
2
3 4
VCO BOARD
V_LV
MAIN
UNIT
8V
(1)
4.7V
R17
22 EP522
C28
47p
D526 D2
1SS400 1SS400
UNLK
PLLCK PLLCK
PLLDATA PLLDATA
PLLSTB1
U_LV
PLLSW8V
C1
0.001
R1
100k
X1
PLLSW8V
R34
CR-719
150
4.7V
R19
22 EP523
C29
47p
D3
D527
1SS400
1SS400
PLLCK
PLLDATA
PLLSTB2 PLLSTB2
BUS LINE2
7.1V
R4 C12
100k 0.5p
L1
Q2
1.0
Q1 UNR921NJ
UNR9213J
0V
8V
Q100
C100 R103 C103 C106
UNR9213J
0.1 100k 0.3p 4p
Q101
2SC5231
L100
0.47 C110
0.5p
PLLOUT
V_LV
k
8V
R62 R77
D4
27k 3.9k
DA221
5 4
IC1
MB15A02PFV-1
1 16
OSCIN B
2 15 Q9 1 2 3
IC6
OSCOUT P
R82
2SA1586
3 14 TC4S66F
VP FOUT 100
4 13
VCC NC
5 12
DO FC
R83 R89
6 11
GND LE 1.5k 1.2k
7 10
LD DATA
8 9
FIN CLOCK
R63
27k
Q10
2SC4116
R54 10k
R60 10k
R64 10k
8V
R65 R70
D5
27k 4.7k
DA221
5 4
1 2 3
IC2 Q11
IC7
R84
MB15A02PFV-1 2SA1586
TC4S66F
100
1 16
OSCIN B
2 15
OSCOUT P
R85 R90
3 14
VP FOUT 1.2k 680
4 13
VCC NC
5 12
DO FC
R71
6 11
GND LE 18k
7 10 Q12
LD DATA
2SC4116
8 9
FIN CLOCK
R55 10k
R61 10k
R66 10k
HV_I
HV
8V
5VS_W
5VS
C17
0.001
C16
12p
C15 C23 R17 C27
Q3
0.001 22p 100 4p
2SC5231
C20 R13
1p 120
Q4
2SC5231
R114
100
D104
MA2S077
C119 R115
8p 1
C117
4p
Q103
2SC5231
C114 R54 L50 L51
2.2k
4p 56n C54 47p 18n
C55
3p
Q102
2SC5231
D50
R50 C52 D105
MA2S077
22 3p MA2S077
Q50
2SC4403
D51
MA2S077
Q22 R130
2SA1362 2.2k
Q19
R124
UNR9213J
1k
C130
C118 R133 C125 L4 R643
10p
W511 0.001 39 0.001 18n 68
Q30
2SC3357
W512
L22 L29
56n 56n
D27
C199
MA742
0.001
U_TXLO
Q23
2SA1362
R131
2.2k
R125
1k
C131 C136
UTXC
3p 3p
C119 R135 C129
Q20 15p 15 10p
UNR9213J
Q31
2SC5085
L23
10n
L30
22n
D28
C200 C241
MA742
0.001 0.001
HV_I
HV
8V
5VS_W
5VS
D5 L6
J2
1SV308 56n
V_TXLO V_TXLO
V_RXLO V_RXLO
GND GND
U_TXLO U_TXLO
U_RXLO U_RXLO
C28 R22 D6 R24 R25 L7 L8
GND GND
8p 1 MA2S077 1 1 39n 39n
UR5 UR5
800R5 800R5
GND GND
PLLOUT PLLOUT
Q5
2SC5231
D103 L104
1SV308 18n
R124
4.7k
R117 R119 L105 L106 D106
12 12 22n 10n 1SV308
Q105
UNR9213J
C128
[TPE],[KOR],[AUS]
100p
[EXP] only
C127
C129 C132 L110 D107
2p 1p 1.5p 10n W1 W2
MA2S077
R127 R128
22 22
Q104
2SC5231
C123 [EUR],[ITR],[USA],
2p [EUR-1]only
PLLOUT
V_TXLO
RX: 0V
TX: 7.8V
IC13
W528
S-AV32
R645 R174
1 2 3 4
15 15
C150
22p
Q33
2SC2954
W503
C259 D45 C279 L46 L45 L49
0.001 UM9401F 0.001 47n 56n 47n
D33
C240
MA742
0.001
IC14
S-AU82L
C151 L15 R176
1 2 3 4 MP4
7p 15n 18
3 2 1
L9
10n
Q34
2SC3357
C246 D40 C284 C288 C292 L51 L52 L56
470p UM9401F 12p 7p 9p 10n 22n 15n
D34
MA742
11 - 3
BUS LINE1
HV_I
8V
5VS_W
5VS
MAIN
UNIT
(3)
n
o
p
U_TXLO
HV
q
BUS LINE2