Icom IC-2820H Service Manual page 47

MAIN UNIT (2)
HV
8V
5V
5VS
L5V To VCO
MOD_DA
MODSEL
R_LV
L_LV
VTX_C
UTX_C
AMOD
DA_STB
DA_CK
DA_DATA
DA2_STB
DA3_STB
L_LV
R_LV
L_LO_SW
R_VVCO_SEL
R_UVCO_SEL
VMMUTE
UMMUTE
L_VCO_SHIFT
PLLDATA
PLLCK
L_PLLSTB
R_PLLSTB
L_PLLSW
R_PLLSW
L_UNLOCK
R_UNLOCK
C;4.9V
Q43
L_R5C L_R5
UNR911NJ
Q44
R_R5C R_R5
UNR911NJ
Q45
R_AMC R_AM
UNR9114J
Q46
L_AM
L_AMC
UNR9114J
L_R5C
R_R5C
R_AMC
R256 R;3.7V
L_AMC
6.8K
R400_S
C355 C358
R;0.8V
0.0039 0.0018
R283 R288
C367 R277
4 3
39K 22K 12K
0.033
R_RX800
5 2
6 1
Q50
UNR9213J
R;1.9V
L_WN_SEL
100K
L_DET_MUTE
L_DA_SEL
R253
R;1.2V
R276 R278 R285
L_AFFILSEL
R_AFFILSEL
68K 68K 68K
100K
R246 R265
L_DTCS_IN
10K
100K R282
R279 10K
L_WXALT
DAFOUT
VDET
UDET
C;7.9V
R257
6.8K
R_WN_SEL
C356 C359
R_DET_MUTE
0.0039 0.0018
R280
R_DA_SEL
R284 R290
C371
4 3
0.033 39K 22K
5 2
6 1
VAFO
UAFO
Q49
UNR9213J
R_DET_MUTE
R_AFFILSEL
R_DA_SEL
100K
Q42
R263 XP4601
3
4
R281 R286
2 5
68K
68K 68K
R_WXALT
1 6
100K R270
R_DTCS_I
R249 10K
L_SQL
L_RSSI
R_SQL I
R_RSSI
2820̲A3format.indd 18-19
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C;4.9V
LMV321IDCK
R810 5
IC53
1
C876
4
100K
3
10 EEE-S
2
R807
220K
IC8
1 24
VIN1 VIN8
R_SQL 23
2
VOUT1 VOUT8
3 22
VOUT2 VOUT7
4 21
VIN2 VIN7
5 20
VDD GND
6 19
LD RESET
7 18
CLK VDAREF
8 17
DI DO
9 16
VIN3 VIN6
10 15
VOUT3 VOUT6
11 14
VOUT4 VOUT5
12 13
VIN4 VIN5
M62363FP
L_SQL
R305
10K
R;3.5V
IC11 Q56
UNR9113J
1 8
COM VCC
2 7 Q53 FI1
IN H CH0
3 6 UNR9113J LT450HW
VEE CH1 MA2S111
C932 C930 D84
4 5
GND A I O
D82 0.1 0.1 MA2S111
TC7W53FU
Q54
MA2S111 C933 C931 D85
UNR9210J
I O
D83 0.1
0.1 FI2 MA2S111
LT450EW
R;4.4V(MODE:AM)
R301
100
R328
C427
180K 0.01
Q55
XP6501
IC13
0
1 8
COM VCC
2 7
INH CH0 R303 R306
R293
3 6
VEE CH1
4 5
GND A 18K 1.5K
R310
TC7W53FU
470K
R307 R317 C418
82K 10K 220P
C419
220P
IC12
470P
1 8
COM VCC
2 7
12K INH CH0 C402
3 6
VEE CH1
4 5
GND A R302 R308 R315
TC7W53FU
0 470 0
L_SQL
L_RSSI
R329
0
R_SQL
R_RSSI
R294
UDET
100K R296
R295 10K
10 - 3
L_VCO8
GND
VMMUTE
L_VCO_SHIFT
C466 MOD
L_VCO_MO D PLLCK
PLLDATA
2.2 LREFCON
L_PLLSTB
L_R5C
L_2ndLo
L_LO_SW
8V
L_REF_MOD
R368
C453
1 MSVA 18K
REF_MOD
L_PLLSW
L_UNLOCK
L_LV
8V
R_UVCO_SEL
R_VVCO_SEL
R_MOD
UMMUTE
2.2 UMMUTE
R_VCO_MOD
C877
R298
1 MSVA
R_REF_MOD
18K
C394
R_REFMOD
RREFCON
5VS
R_2ndLo
R_R5
R_UNLOCK
R_UNLOCK
PLLCK
PLLCK
PLLDATA
PLLDATA
R_PLLSTB
R_PLLSTB
R _ PLLSW
R_PLLSW
R_LV
R_LV
R_2ndLo
L_R5
0.001
0.01
C467
C472
0.1
Q66
2SC4406
C437
R;4.4V(MODE:AM)
R351
Q69
100
Q57
XP6501
R376
C471
U NR9210J
C429
180K 0.01
22P
Q63
XP6501 Q67
XP6501
R352
C477
1.5K
R358 22P
470K
R372
Q59
UNR9213J
82K 10K
R388
470P
C459
IC16
1 8
COM VCC R367
2 7
INH CH0
3 6
VEE CH1 0 R375
4 5
GND A
470 Q117
TC7W53FU
UNR9213J
MAIN UNIT (4)
(PLL circuit for Left band)
MAIN UNIT (5)
(PLL circuit for Right band)
VT;0V
UT;4.6V
R;4.7V
R444
220
617DB
IC19
FL-408 1
G1
2
R399 D1
3
OUT GND R416 D2
C507 C514
2 3
330 GND IN
4 1 SPM5001
0 12P 0.001 L122
FI5
R;3.4V
UNR9113J
UNR9113J
Q71 FI3
LT450HW
Q70
C927 C926 D95
I O
D93 0.1 0.1 MA2S111
M A2S111
FI4
LT450EW
C929 C928
I O
D94 0.1 0.1 D96
M A2S111 MA2S111
VT;4.7V
C487 C495 UT;0V
R;4.6V
0.1 0.1
C486
0.1
C475
220P
C476
220P
0.001
FL-409
C517
0.01
Q75
R794 C523
R439
2SC4406
R389 OUT
22K
2
220 GND
4
0
R811
C884 JTB450C24
X3
3.3K 0.1
R415
3.3K
10 MSVA
HV
8V
L5V
L5V
5V
L5V
VHFYGR
VHFYGR
L_RXLO
L_RXLO
GND DAN222
VTX_C
L220_R5
L_VR5
UTX_C
L_UR5
L140_R5
D112
DAN222
L300_R5
L400_R5
D113
5VS
R140_R5
R140_R5
R800_R5
R800_R5
R400_R5
R400_R5
R_Lo
5VS
UT8
UT8
UHFYGR
UHFYGR
DA_STB
DA_CK
DA_DATA
DA3_STB
L_R5
100K
R447 C868
R453
0.01
220
R790 L127
C555
6 VVIF
100
G2
5
S1 0.1
4
S2 R791
C556
UUIF
100 617DB 0.001
C869
5VS
0.01
R_R5
R400_S
5V
UAGC
VAGC
L140_R5
R140_R5
R464 R467
L220_R5
220 220
L300_R5
L_R5
R_R5
R400_R5
L400_R5
R_RX800
IC20
1 6
G1 G2
R800_R5
2 5
D1 S1
3 4
D2 S2
SPM5001
GND R452
C548
3
IN
1
0 0.01
FI6
VAGC
UAGC
2007/04/02 11:08:02