Icom IC-7800 Service Manual Addendum page 75

Dec. 2009
RXPLL-A/B UNIT (1)
R154
100
PLL+8V
R155
180
Q150
C155 C152
2SK210
150p 33p
L151
D153
LB-343
HSM88AS
D154
HSM88AS
C162 R159
5p
100
C203
0.01
R161
47k
R163
C164 R206 C206
0.0047 15 15 0.0047
0V 0.48V
Q151
2SC4081
PLL+5V PLL+5V
PLL+5V PLL+5V
C165
R166
100 0.0047
R109
C130 0.001
1k
C139 0.0047
C138 0.0047
2.42V
C137 0.0047
C136 0.0047
C135 0.0047
C134 0.0047
C133 0.0047
C114
0.1
76
VSS
77
VSS
78
VDD
79
BUM2I
80
BUN2I
81
BUN4I
82
VDD
C115 83
BUM2O
0.1
84
BUN2O
85
BUN4O
86
VSS
87
VDD
88 IC101
SYS-CLK
C116 89 SC-1246A
0.1 VSS
90
VSS
91
STRB
92
CON2
93
CON1
94
CON0
95
VSS
96
BUSY
97
VSS
98
CONTCLK
99
DATA
100
VDD
C117
0.1
STB1
CN21
CK
DATA
R123 R124 R125 R126 R127 R128 R129 R130
1k 1k 1k
1k 1k 1k 1k 1k
2.38V
IC103
TC7S08F C120
0.0047
1 5
2
3 4
R140
1k
RXPLL-A unit only
PLL+8V
L220 C220
100p
R210 R219
1.8k 100
5.63V
IC201
LMX2306TM
1 16
FLO VP
2 15
CPO VCC2
3 14
GND PO/LD
4 13
GND LE C205
5 12 0.0047
FIN DATA
6 11
FIN CLOCK
7 10 L230
VCC1 CE C230
8 9 56p
OSCIN GND
C208 C207
15p 15p
PLL+5V
D201
L211
DAN222
PLL+5V
Q201
DTA114EU
R167
C297
22 5p
L240
C240
39p
R169
47k
Q152
2SC4081
D101
DAN222 1mV [A]
0.4mV [B]
2.0V
L250 C250
56p
PLL+5V
C110
0.1
50
VDD
49
DIVOUT
C299
48
VSS 22p
47
REFIN
46
PDIN
45 L260 C260
VSS
68p
44
OSCO
43
VSS
42
VDD
C109
41
OSCF
0.1
40
VSS
39
OSCI
38
VDD
37
VSS
36
SYSRESET
35
VDD
34
VDD
33
TEOUTH4
32
TEOUTH3
31
C108
TEOUTH2
30
0.1
TEOUTH1
29
TEOUTH0
28
VDD
27
VSS
26
VSS
C107
0.1
D271
L270
MA357
R134
470
R131 R132 R133
1k 1k 1k
PLL+8V
R101
330K ERJ3GE
PLL+5V
IC104
TC7S04F
1 5
2
3 4
M100K
74
L280
MMUT
R224
100
4.97V
Q220
C229
2SK210
C223 3p
39p
D222
MA77
4.32V
C227
5p
Q301
2SC5226A
R301
10
C301
Q280
DTC114EU 0.0047
R307
VA1S
33
R234
100
Q230
C239
2SK210
C233 4p
33p
D232
MA77
C237
4p
D342
DAN202K Q341
Q281
VA1S DTC114EU
DTC114EU
VA2S VA2S
R244
100
PLL+5V
PLL+8V
Q240
2SK210
C243
27p
C247 D242
3p MA77
Q282
DTC114EU
VA3S
PLL+8V
R254
100
Q441
Q250
DTC114EU
2SK210
C253
39p
C257 D252
10p
MA77
Q283
DTC114EU
VA4S
PLL+5V
R264
100
Q260
2SK210
C263
39p
C267 D262
10p
MA77
Q284
DTC114EU
VA5S
R274
100
Q270
PLL+8V
C273 2SK210
22p
C277 D272
10p
MA77
Q285
DTC114EU
VA6S
PLL+8V PLL+8V
PLL+5V PLL+5V
M100K
MMUT
PLL+8V PLL+8V
L302 L351
R353
4.7k
C303 R318
0.0047 33
C331 C333 L332
68p
68p 56n Q302
2SC5226A
Q351
3SK294
C335
C306 R351
7p
0.0047 10
D341 C336 R309
6.8k
MA77 15p
C312
0.0047
PLL+5V
R342 10k
Q303
2SC5226A
Explanatory notes
VOLTAGE LINE
[A]: RXPLL-A unit
[B]: RXPLL-B unit
7.83V
MA77
R427 100 D421
C449
0.0047 L441 L442 C447 C452 L451
Q422
47n 68p 180p
68n DTC114EU
C442
18p
C445
Q421
6p DTC114EU
R365
D441 C443 8.2
MA77 12p
R443
1k
RXPLL-A unit only
D422
R441 C448
MA77
1k 0.0047
L452
C453
0.1
PLL+5V
RXPLL-A unit only
R8 R9
1.8k 100k
PLL+5V
Q1
DTC114TU R1
100k
DRES
L11
HF50ACC322513
UNLK UNLK
L12
HF50ACC322513
DATA
CK
R10 220
CN21
R11 220
R52
82 [A] only
R12 220
IC51
TA7808F
R13 220
R51
27
O I R14 220
G
R15 220
L13
CN22
HF50ACC322513
R16 220
R17 220
IC61
PLL+5V PLL+5V
TA78L05F
T8VL
R61
R8VL P+15V
27
L10
O I
HF50ACC322513
G
4.77V
IC1
CD74HC4094M
14.94V
1 16
STROBE VCC
2 15
DATA OE
3 14
CP Q4
STB2 4 13
Q0 Q5
STB1 5 12
Q1 Q6
STB3 6 11
Q2 Q7
STB4 7 10
Q3 QS2
8 9
GND QS1
L1
PLL+8V C1 0.1
UNLK UNLK
PLL+5V PLL+5V
PLL+8V PLL+8V
Q41 EP20
DTC114EU
L20
UNLK
T8VL EP21
R8VL EP22
DRES
CK
DATA
STB3
STB4
CN22
MKRS
M100K
MMUT
Q364 Q363
DTC114EU
DTA114EU
Q352
C358
2SC5226A
0.0047
R369
0
C360
0.0047
MESUREMENT CONDITIONS
voltage at RX(no instruction)
frequency: 14.1 MHz
mode: J3E(USB)
ANT(RX): no input
(TX): no modulation
Digital tester
range: input impedance
0.6dBm
C421 C423
[A]/[B]
J351
0.0047 0.0047
R1LO/S1LO to RXPLL-A/B
unit J1101
C424 J421
0.0047
T1LO to MAIN
unit J503
C422
0.0047
TX: 0.7dBm
[A]/[B]
J2
GND
UNLKA/UNLKB
DRES
GND
GND
PDATA/PDATB
PCKA/PCKB
GND
to LOGIC
GND
unit J816
C2A1/C2B1 C2A1/C2B1
[A]
C2A2/C2B2 C2A2/C2B2
PSTA/PSTB PSTA/PSTB
to LOGIC
PSLA/PSLB PSLA/PSLB
unit J815
GND
[B]
GND
P+5V
P+5V P+5V
T8V T8V
R8V R8V
P+15V
P+15V
GND
from OSC
J10
unit J72
M10M/S10M[A]/[B]
[A]
from OSC
unit J73
[B]
R30
22
C30
0.1
RXPLL-A/B
Q30
R32 2SC4081
100 UNIT (2)
10M
C32
UNLK 0.1
UNLK
PLL+5V
PLL+5V
PLL+8V
PLL+8V
T8V
R8V
DRES
CK
DATA
STB3
STB4
CN22
MKRS
40M
M100K