Icom IC-2800H Service Manual page 45

MAIN UNIT
4.96 4.96
0.042
R276
R273 0.042
R513 D73
D47 100k R514
2.2k
1SS355 100k 1SS355
2.2k
R274
R515
22k
22k
R275 Q78
10k 2SC4081 R516
10k
0.63 Q96
2SC4081
R462 R463
R277
100k 100k
4.7k R461
100k
R486
R459
1k
1k
MICUD
C370
0.022 R460
1k
PTTM1
PTTP1
IC16
R282 1M
S-80945ALMP-DA9-T2
1 5
OUT CD C372
2 C373
VDD
22p
3 4 22p
X4
VSS NC
SMD-49
C371 10.000 MHz
EP2
0.022
1
MMZ1608Y102BT
2
EP3
3
C374 MMZ1608Y102BT
4
0.001
5
6
R283
IC17 7
22k
8
X25320SI-2.7
RESET
9
1 8 10
CS VCC
CLONEC
2 7 R287 1k 11
SO HOLD
3 6 PLSTB R336 1k 12
WP SCK
4 5 STB R467 1k 13
VSS SI
CK R468 1k 14
DATA
R289 1k 15
R465
16
1k
RXD
17
TXD 18
19
R466
20
1k
21
22
23
4.96
R301 Q79 24
C505
C504
25
1k 2SA1576
470p
470p
R469
C516 R292
+ 1k
C506
10 4.7k
470p
W15
R470
1k
R291 ETONE
15k
R543
10k TXDF PCTRL
4.96
R544
1k
0.045
R542 C510 C376
10k 0.001 0.1
RXDF
R295
4.93
4.7k C377
Q80 10
2SC4081
R294
4.7k SP
R297
R296 10k
1
C382
C383
C384
47p
47p
0.1
C379 C380 C381
47p 47p 47p
J3
6 5 4 3 2 1
R524
J6
100k
CONTROL UNIT J2
OPD
1
GND
2
DETO
3
C5V
4
TOE
DTMF UNIT
5
Q1
(OPTION) 6
Q2
7
Q3
8
Q4
9
STD
10
J5
M8V
1
MU/D
2
EXTMIC
3
MIC PTT
4
INPUT MICE
5
MIC
6
E
7
MDATA
8
COMPLETE VIEW
R300 1k
R471 1k
R284 1k
R473 1k
R474 1k
R475 1k
R476 1k
R304 1k
0.647
R305 1M
R477 1k
R478 1k
R479 1k
R480 1k
R464
R308 1k
100k
R481 1k
R482 1k
R310 1k
R281 R483 1k
100k R484 1k
R485 1k
R317
10k
75
PB0/AN0 P97/SEG40
74 R318 22k
AVSS P96/SEG39
R319 39k
73
TEST P95/SEG38
72 R320 82k
X2 P94/SEG37
R322 150k
71
X1 P93/SEG36
70 R321 330k
VSS P92/SEG35
69 R324 680k
OSC1 P91/SEG34
68 R323 1.2M
OSC2 P90/SEG33
IC19 R313 1k
67
RES P87/SEG32
HD6433876NB10H 66 R487 1k
[USA]
NMI P86/SEG31
HD6433876NB11H [Other] 65 R488 1k
P20/IRQ4/ADTRG P85/SEG30
64 R489 1k
P21/SCK1 P84/SEG29
R490 1k
63
P22/SI1 P83/SEG28
62 R3251k
P23/SO1 P82/SEG27
61 R493 1k
P24/SCK3 P81/SEG26
60 R491 1k
P25/RXD P80/SEG25
R492 1k
59
P26/TXD P77/SEG24
58
P27/IRQ0 P76/SEG23
57 R494 1k
P17/IRQ3/TMIF P75/SEG22
56 R328 1k
P16/IRQ2 P74/SEG21
55 R495 1k
P15/IRQ1 P73/SEG20
54 R496 1k
P14 P72/SEG19
53
R497 1k
P13/TMIG P71/SEG18
52 R498 1k
P12/TMOFH P70/SEG17
51
P11/TMOFL P67/SEG16
R499 1k
R332 1k
R500 1k
R501 1k
R517 1k
R518 1k
+ R334 1k
C378 R299
R298 R502 1k
0.001 1k
470k
R503 1k
R337
1k
R504
1k
R505
1k
D49
W13
E8
C385
0.1
R506 1k
II3
OPD
D51 D53
R507 1k
D50
Q1 D52 D54
II2
Q2
D58
Q3 R508 1k
II1
Q4
D56
STD
R509 1k D59
D55
D62
1SS355
D57 D60
II0
L70 2.2 H
L71 2.2 H
L72 2.2 H
L73 2.2 H
L74 2.2 H
L75 2.2 H
L76 0.82 H
L77 2.2 H
D61
MA8062
C386 C387 C388 C389 C390
47p 47p 47p 47p 47p
PTTP
LIMIT
LV
TONEIN
VSQL
VSOUT
USQL
CLONEC
USOUT
DTMF
TXDF
RXDF
CTCSS
Q4
Q3
Q2
Q1 TMAIN
IC20B
NJM4558M
STD
2.63 IC20A
OPD C392
VDMUTE NJM4558M
100p
R346
UDMUTE
R349
1M
VAMUTE
470k
UAMUTE 6
—
TONEIN 7
8
5 R348
+
+
FANC 1
100k
R350
R347 C395 —
C393 120k
C394 4
C511 470k 0.1
0.01
0.1
0.001
2.52
DMAIN
C402
R316
0.1
1k
POWC
C515
0.001
Q82
DTC144EU
UMMUTE
VMMUTE
DTMUTE
MMUTE
R368
PSEL
47k
PSQL
UTX
VTX
[EUR], [ITA] only UDMUTE
W/N
MW/N VDMUTE
VSHIFT
3LB
4RX
1RX
C507 C508
0.001 0.001
UAM
VAM
ETONE
DMAIN
TMAIN CTCSS
UUNLK
VUNLK DTMF
MRIPT
VCK
VDATA
DTMUTE
MMUTE
MRIPT
LIMIT
C434
1
C435
0.1
C519
0.001
13.36
8.8
R407 R408
1 18
7.87
Q90
R409
IC25
4.96
2SD999 390
R410
R411 TC7S66FU
C452 100k
C453 100 R413
9.41
0.01
10 1.2k
2.22
R341
D64
R342
+ +
470k R343 C456
MA8091
390k
5 10
120k
3
+
4
C454 C455
Q91
1
— 0.001
0.001
DTA144EU Q92 R412
2
IC24
10k
Q93
DTC
TC75S51F
DTC144EU
114EU
3.78
C457
D63
2.5 R345 R344 1
MA8091
10k 12k R415
4.7k
D65
1SS355
D66
1SS355
C391
47p
R523 100k
D74
R519
DA202U
15k
R525 100k
Q98
DTC144EU
C470
0.01
IC29
BU4053BCFV
C396 R354
0.1 1M
R521
R351 R352 R353
470k
82k 82k 82k
3
C472
R355 0.1 W17
2 C398 C399 R522
C397 C471
470k
0.039 0.1 470k
0.0015 0.1
IC21
BU4066BCFV
Q83
2.83
2SC4081
R361 R362 R363 R364 C405 R373
100k 470k 470k 470k 1.00
1 470k
R370 R371 R372
C409
0.39
12k 22k 39k
0.033
R374
R365 R366 R367 C406 C407
C408
330
470k 470k 470k 0.01 0.015
0.001
Q85
2.80
2SC4081
C403
R369 1.00
R384
0.1
22k
470k
R381 R382 R383
12k 22k 39k
C418
0.033
0.39
C404
C415
C416 C417
1
R385
0.01
0.015 0.001
330
7.25
7.88
Q88
2SC4081
C436 R425
0.033 C440 100
R430 820k
C439
10
0.001
4.04
C443 12p
R424 R426 C441
R418 R422 R510 +
100k 680 0.033
270k 100k 27k
C437 6
2.97 R431
—
0.1 7 330k
R427
5
+
390
R419 R420
R421 R432
+ IC23B
R429
47k 470k C438 18k
330
NJM4558M
R428 390k
0.001 R423 C442
47 4.00
22k 1 R549
47k
[EUR], [ITA]
0.35
0.97
Q89
2SC4116
R445 6.8k
[EUR], [ITA] only
R448 IC27B
R414
330k
NJM4558M
100k
2.67
R450
1 5
2.2M
2
5
C458 +
3 4 IC26 7
0.001 R447 220k
C479 6
BU4066BCFV
—
0.22
R449
R532 R451
C461 270k
R533 390k 68k
0.22
22k other
47k [USA]
only
R416
3.9k Other
22k [USA]
CP4
R417
R511 5.6k 3.9k
1 14
C348
I/O VDD
2 13
1 O/I CONT.A
R271 3 12
C349
+ O/I CONT.D
4 11
100k
I/O I/O 1
5 10
CONT.B O/I
C459 6 9
CONT.C O/I
10 7 8
VEE I/O
IC13 BU4066BCFV
Q72
DTC144EU
DATAIN AFOUT DATAOUT
CLONE
8V
HV
VTX
R1
4.7k
VSHIFT
C3
C5V
1
R2
100k
VMMUTE
STB
DATA
D75
CK
DA202U
PLSTB
R545
VUNLK
1k
UUNLK
Q13
DTC144EU
Q81
2SC4081
R358
R357
6.88
2.2k
1M UTX
4.9
R356
10k
R77
C400 VAF 4.7k
0.1 4.61
C401 D19
R360
R359
0.1 LV 1SS355
22k
10k
C125
1
R375 Q84 7.87
4.66
C126
4.7k 2SC4081
0.001
UMMUTE
R379 C413
C410 C412
470k 0.001
0.015 0.0056
1RX
R380
C499
C411 1k
0.001
0.0056
4RX
R377 C414 1
R376
47k
W8
22k R378
4.17
2.2k
7.87
Q86
4.71
R386 4.7k 2SC4081
R390
C419 C422
C421
470k
0.015 0.001 Q34, 37: UMG9N
0.0056
R391
C420 1k
POWC
0.0056
R388 C423 1
R387 47k
VDET
R389
4.2
22k
2.2k
UDET
R404
R403
4.90
2.2k 6.88
1M
R402
C432
10k
0.1 Q87
2SC4081
4.62
3LB
C433 R406
R405
0.1 22k
10k
UAF
R440
100
R436 820k
4.08
IC23A
R435 R190
560k NJM4558M
C446 C451 220
0.1 10
C445
R434 +
10
220k 8 +
C447
3
0.0027 +
C444 R437
1
1 68k
2
— R191
R433 R438 R439 C450 560
4
82k 82k 100p
47k [EUR], C449
[ITA] only 82p
C448
820p 3.88
R441
10k
MW/N
only
R443
47k
R442 MOD
[EUR], [ITA] only
470k
[EUR], [ITA] only
D40
MA8047
C462
D68 IC27A
0.001
R452 RB706F-40 NJM4558M X2
120k
CDB450C24
R456
2.66 8 47k
3
D67 1
R453 +
1.94
MA728 R203
82k
2
1.5k Other
—
3.3k [EUR], [ITA ]
R454 R455
C463 C464 4 +
82k 82k
4.92
0.1 0.1
1.27
C250
47
VDET
UAFO
VAFO
PSEL
R272
C256
10k
1
C284
PSQL
1
VSQL
Q73
DTC144EU
C5V
PSQL
Q
D1
1SS355
C4
0.001
R49
470
Q14
DTB1
Q17
2SC408
C12
100
R78
100k
Q34
1
2
3
Q37 1
2
3
Q35,
C475
0.001
R139
270
W7
C24
0.00
VR 4.6
VR 4.74
C249
0.1
VR
VR 0
R
1
C251
0.022