Icom IC-756PRO III Service Manual - page 85
10 - 2
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176
177
178
179
180
R2019 10k
R2018 10k
R2017 10k
R2016 10k
R2015 10k
R2014 10k
R2020 10k
C2031 0.1
C2030 0.1
C2029 0.1
C2028 0.1
C2027 0.1
C2026 100
C2025
0.1
C2024
0.1
C2023
0.1
C2022
0.1
C2021
0.1
C2020
0.1
C2019
0.1
C2018
0.1
C2017
0.1
R2002 10k
R2003 10k
R2004 10k
R2005 10k
R2006 10k
R2007 10k
R2008 10k
R2010 10k
R2009 10k
R2011 10k
R2012 10k
R2013 10k
C2003
0.1
C2002
0.1
C2001
0.1
C2004
0.1
C2005
0.1
C2006
0.1
C2007
0.1
C2008
0.1
R2001
10k
C2010 0.1
C2009 0.1
C2011 0.1
C2012 0.1
C2013 0.1
C2014 0.1
C2015 0.1
C2016 0.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A15
A12
A7
A6
A3
A4
A3
A2
A1
A0
O0
O1
O2
GND
VCC
A14
A13
A8
A9
A11.
OE/VPP
A10
CE/PGM
O7
O6
O5
O4
O3
1
3
2
4
5
6
7
8
9
10
19
20
18
17
16
15
14
13
12
A1
G1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
G2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
11
R2074
100
R2073
10K
R2072
10K
RDT0
RDT1
RDT2
RDT3
RDT4
RDT5
RDT6
RDT7
DD0
DD1
DD2
DD3
DD4
DD5
DD6
DD7
RDT6
RDT7
RDT5
RDT4
RDT3
DA10
DA11
DA9
DA8
DA13
DA14
R2071
100
20
18
19
17
16
15
14
13
12
11
2
1
3
4
5
6
7
8
9
10
G2
VCC
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
G1
A1
A2
A3
A4
A5
A6
A7
A8
GND
C2062
0.1
R2064
100
C2072
0.1
R2062 47k
R2068 47k
R2067 47k
MCK
DSFW
MDAT
DSFR
DSKY
1
2
3
5
4
C2061
0.1
R2063
100
IC2062
TC74VHC541FT
IC2061
TC7SET08FU
C2092
0.027
C2093
0.1
5
1
2
3
4
IC2092
TC7S02FU
OUT
VDD
VSS
CD
NC
R2091 10k
C2091 0.1
1
2
3
4
5
IC2091
S-80934ANMP-DDY
R2510 100
R2512 100
R2514 100
R2516 100
R2518 100
R2520 100
R2503 100
R2505 100
R2507 100
R2509 100
R2511 100
R2513 100
R2515 100
R2517 100
R2521 100
R2523 4.7k
R2519 100
R2528 100
R2526 100
L2503
HF50ACC322513
L2506
HF50ACC322513
L2504
HF5CACC322513
C2512 0.1
C2511 100
C2510 0.1
C2509 100
C2508 0.1
C2507 100
L2502
HF50ACC322513
C2505 100
14
13
12
11
10
9
8
1
2
3
4
5
6
7
1G
1A
1Y
2G
2A
2Y
GND
VCC
4G
4A
4Y
3G
3A
3Y
IC2051
TC74VHC125FT
C2051
0.1
R2051
100
R2043
100
C2042
0.1
4
5
3
2
C2041
0.1
R2042
100
4
5
3
2
X2041 CR-568
R2041 1M
C2044
15p
C2043
15p
R2052
100
1
2
3
5
4
C2052
0.1
IC2052
TC7SET08FU
IC2042
TC7SH04FU
IC2041
TC7SHU04FU
D
CK
Q
Q
CLR
PR
8
9
11
12
13
10
R2054
100
10
3
2
D
CK
CLR
V
G
PR
Q
Q
C2054
0.1
IC2053C
TC74HC02AF
IC2053D
TC74HC02AF
IC2054B
TC74VHC74FT
IC2054A
TC74VHC74FT
11
12
13
4
5
6
IC2053B
TC74HC02AF
C2351
10p
4
5
3
2
C2361
0.1
5
4
3
2
X2351 CR-643
R2353 1M
C2352
10p
IC2353
TC7SH04FU
IC2352
TC7SHU04FU
R2354
100
C2360
0.1
IC2053A
TC74HC02AF
2
3
1
14
7
C2053
0.1
R2053
100
R2306
10k
1
4
2
3
8
R2308
10k
C2308
10
7
6
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
27
28
26
25
24
23
22
21
20
19
18
17
16
15
C2328
100
Q2321
2SJ381
C2327
0.1
R2328
10k
R2327
2.2k
R2325
4.7
C2329 0.1
C2330 0.1
R2326
10k
Q2322
2SJ381
C2322
0.0068
R2323
68
R2324
68
IC2321
CS5396-KS
R2321 68
R2322
68
C2321
0.0068
C2323 0.1
C2324 10
C2325 0.1
CK
D
V
CLR
Q
Q
PR
G
1
2
7 4
3
5
C2343
0.1
IC2342
TC74VHC4040FT
9
7
6
5
3
2
4
13
12
14
15
1
8
11
10
CLK
RST
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
16
C2342
0.1
R2345
100
R2341
100
IC2341D
TC74VHC00FT
12
13
11
IC2348
TC7SET08FU
IC2341A
TC74VHC00FT
1
2
4
14
3
1
2
7
C2341
0.1
CK
1 14
2
3
5
6
4
7
D
G
PR
CLR
V
Q
Q
12
11
9
8
CK
D
PR
CLR
Q
Q
C2346
0.1
R2344
100
R2343
100
C2348
0.1
5
3
4
2
1
C2347
0.1
R2342
100
5
4
3
2
1
IC2343
TC7WH74FU
IC2344A
TC74VHC74FT
IC2344B
TC74VHC74FT
IC2345
TC7SH32FU
IC2346
TC7SET08FU
8
9
10
15
16
14
13
12
11
10
9
2
1
3
4
5
6
7
8
IC2347
TC74HC390AF
6
7
8
5
4
1
2
3
R2293
100k
IC2291
TC4W53FU
C2292 0.1
R2292 100
R2291 100
C2291 0.1
C2301
10
R2302
1k
W2302
W2301
45
8
7
6
1
2
3
IC2302
TC4W53FU
R2422
10k
R2441
4.7k
3
2
4
1
11
R2451
100
C2442
0.1
IC2281A
NJM2058M
R2442
10k
C2446
0.0047
C2447
680p
R2443
10k
C2450
0.001
C2451
680p
R2444
10k
C2448
0.0068
C2449
180p
5
6
7
IC2441B
NJM2058M
IC2441C
NJM2058M
C2453
0.0047
C2452
0.0082
C2454
0.0012
R2445
10k
R2446
10k
10
9
8
R2447
10k
R2449
10k
IC2441D
NJM2058M
R2448
10k
12
13
14
6
5
7
C2573
0.22
R2573
10k
C2574
0.015
R2571
10k
R2572
10k
C2572
0.082
R2578
470k
IC2472B
M5218AFP
C2571
0.22
R2574
10k
R2575
10k
R2576
10k
C2575
0.082
C2577
0.015
C2576
0.22
2
3
8
4
1
C2578
0.1
C2579
10
R2577
100
IC2472A
M5218AFP
C2071
0.1
IC2071
SC-1371
2
1
5
4
3
C2065
0.1
R2065
100
1
2
5
4
3
C2066
0.1
R2066
100
1
2
5
4
3
C2063
0.1
R2083
100
R2102
100
R2101
100k
2
1
5
4
3
C2101
0.1
IC2101
TC7SH32FU
L2001
D10F-A814AY-101K
IC2066
TC7SET08FU
IC2065
TC7SET08FU
IC2063
TC7SET08FU
R2228
1k
R2229
R
V
-148
R2226
1k
R2227
R
V
-148
C2220
10
7
6
5
C2218
0.0022
R2223
82k
C2219
220p
C2217
0.001
R2222
82k
R2220
470k
C2214
10
R2216
1.5k
R2257
1k
Q2202
DTC114EE
Q2201
DTC114EE
Q2211
DTC114EE
C2216
10
C2215
0.1
1
3
2
4
8
C2213
0.1
R2215
270
R2217
390k
R2221
150k
R2219
390k
R2218
100
R2213
30k
R2212
47k
C2212
0.1
R2214
18k
R2211
100k
C2211
0.0047
12
13
2
1
5
3
6
11
10
9
14
15
4
16
7
8
C2263 560p
C2262 0.0012
R2256
22k
C2261 0.0047
R2255
22k
C2260 82p
C2259 680p
R2254
22k
C2258 470p
C2257 0.0027
R2253
22k
C2256 270p
8
9
10
14
12
13
IC2281C
NJM2058M
IC2281D
NJM2058M
C2255 0.0022
R2252
22k
R2245 1k
R2244
5.6k
R2243 10k
R2242
240k
IC2281B
NJM2058M
7
5
6
R2241
10k
R2421
100
C2422
0.1
C2424
0.1
C2444
0.1
C2445
22
C2443
22
R2423
100
R2452
100
VCC
BCLK
SDATA
LRCLK
OUTR
REF
GND
OUTL
7
8
6
5
2
1
3
4
IC2461
BU948OF
C2463 10
C2462
0.1
C2461
100
W2471
R2474
100k
R2476
10k
R2475
22k
C2471
0.1
IC2471B
M5218AFP
5
6
7
R2472
150k
L2461
100uH
C2476
0.1
2
5
3
4
2
1
5
3
4
R2486
100
IC2474
TC7SH04FU
IC2475
TC7SET08FU
R2377
1.5k
C2378
0.1
R2379
27k
3
2
4
11
1
R2282
100
C2284
10
C2283
0.1
IC2441A
NJM2058M
R2376 3.9k
C2379
0.1
C2380
0.1
C2285
0.1
R2281
100
C2286
10
R2481
3.3k
Q2213
DTC114EE
R2482
1k
R2483
1.8k
C2472 0.1
R2477 100
R2478 100
C2473 0.1
4
5
8
7
6
1
2
3
R2484
100
C2474
0.1
R2479 10k
C2479 0.001
R2480 22k
3
2
1
4
8
IC2471A
M5218AFP
IC2473
TC4W53FU
R2450
1k
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C2353
10
C2354
0.1
C2358
0.1
C2357
10
C2356
0.1
C2355
10
IC2351
AD1855JRS
C2475
0.1
R2485 100
C2310 10
C2309 0.1
R2309
100
IC2301A
uPC4570G2
IC2301B
uPC4570G2
R2201
100k
X0
X1
Y0
Y1
Z0
Z1
INH
A
B
C
X
Y
Z
IC2201
BU40538CFV
R2202
100
C2202
0.1
C2201
0.1
R2203
100
VREF
VCOM
AGND
AINL+
AINL-
ADCTL
MCLKA
TSTO1
DACTL
CAL
VD
DGND
LRCK
SCLK
AGND
AINR+
AINR-
AGND
VA
VL
LGND
TSTO2
MCLKD
CS/PON
CDIN/DFS
CCLK/(S/M)
SDATA1
SDATA2
C2364
220p
R2357
2.2k
R2356
2.2k
C2366
220p
R2360
2.2k
R2359
2.2k
C2363
1000p
R2351
10k
R2371
8.2k
3
2
8
4
1
5
6
7
R2350
27k
IC2371B
uPC4570G2
C2374
10
C2375
0.1
R2373
220
C2372
10
C2373
0.1
R2372
220
13
12
2
1
5
3
6
11
10
9
15
14
4
8
16
7
X0
X1
Y0
Y1
Z0
Z1
INH
A
B
C
Y
X
Z
IC2372
BU40538CFV
R2378
100k
R2375
100k
R2374
100
C2376
0.1
R2358
2.2k
R2355
2.2k
C2359
10
R2402
15k
C2401
820p
R2403
15k
C2402
150p
R2404
22k
R2370
100k
R2369
100k
L2401
100uH
C2403
10
C2404
0.1
C2407
100p
W2401
IC2401
MAX293CWE
IC2341C
TC74VHC00FT
C2385
390p
R2384
1k
C2383
0.0015
R2381
100k
R2382
1k
R2383
1k
12
13
14
C2381
0.0012
IC2381D
uPC4574G2
IC2381C
uPC4574G2
10
9
8
R2388
10k
R2387
10k
R2389
4.7k
5
6
7
3
2
1
4
11
IC2381B
uPC4574G2
IC2381A
uPC4574G2
C2391
10
C2392
0.1
R2390
100
C2394
0.1
C2393
10
R2391
100
15
16
14
13
12
11
10
9
2
1
3
4
5
6
7
8
J2002
RTDT
CTFL
DSFR
MDAT
DSFW
MCK
DSDR
AGRS
J2001
DSKY
MSL1
TXS
AMS
DSRS
ACKS
CALS
FMNS
MODS
DPGI
NSQO
3R3V_d
DRIF
DTIF
DMAF
DTAF
AGC
DRAF
D5VA
FMTL
-5V
-8V
8V
DFL3
DFL2
DFL1
DFL0
DA0
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
DA9
DA10
DA11
DA12
DA13
DA14
DA15
DBMS
DRD
9
8
1 14
5
6
7
4
ALRC
DLRC
DD
AD
ADSD
ABCK
DRXD
DTFL
DDT
O
DCLK
DRFL
DD0
DD1
DD2
DD3
DD4
DD5
DD6
DD7
DRFL
DCLK
DRXD
DTFL
DFLO
DDTO
DA15
DA12
DA7
DA6
DA5
DA4
DA3
DA2
DA1
DA0
RDT1
RDT0
RDT2
DSDR
DSRS
AVEN
DPGI
RTDT
CTFL
NSQO
DFL2
DFL1
AGC
ABCK
DDAD
DLRC
FMNS
AMS
MODS
DRAF
ALRC
ABCK
ADSD
AVEN
MSL1
CALS
ACKS
DLRC
ABCK
DDAD
DSRS
DRIF
TXS
R2346
100
IC2211B
M5218AFP
AMS
AMS
MODS
DTAF
FMTL
DMAF
DTIF
-
+
-
+
-
+
-
+
-
+
-
+
+
-
+
-
+
-
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
DSP BOARD
TDI
TRST
VDD
TDO
TIMEXP
EMU
ICSA
FLAG3
FLAG2
FLAG1
FLAG0
GND
ADDR0
ADDR1
VDD
ADDR2
ADDR3
ADDR4
GND
ADDR5
ADDR6
ADDR7
VDD
ADDR8
ADDR9
ADDR10
GND
ADDR11
ADDR12
ADDR13
VDD
ADDR14
ADDR15
GND
ADDR16
ADDR17
ADDR18
VDD
VDD
ADDR19
ADDR20
ADDR21
GND
ADDR22
ADDR23
ADDR24
VDD
GND
VDD
ADDR25
ADDR26
ADDR27
GND
MS3
MS2
MS1
MS0
SW
BMS
ADDR28
GND
VDD
VDD
ADDR29
ADDR30
ADDR31
GND
SBTS
DMAR2
DMAR1
HBR
DT1
TCLK1
TFS1
DR1
RCLK1
RFS1
GND
CP
A
DT0
TCLK0
TFS0
DR0
RCLK0
RFS0
VDD
VDD
GND
ADRCLK
RED
Y
HBG
CS
RD
WR
GND
VDD
GND
CLKIN
AC
K
DMA
G2
DMA
G1
PA
G
E
VDD
BR6
BR5
BR4
BR3
BR2
BR1
GND
VDD
GND
D
A
T
A47
D
A
T
A46
D
A
T
A45
VDD
D
A
T
A44
D
A
T
A43
D
A
T
A42
GND
GND
DATA0
DATA1
DATA2
VDD
DATA3
DATA4
DATA5
GND
DATA6
DATA7
DATA8
VDD
DATA9
DATA10
DATA11
GND
DATA12
DATA13
DATA14
VDD
DATA15
DATA16
DATA17
GND
DATA18
DATA19
DATA20
VDD
DATA21
DATA22
DATA23
GND
DATA24
DATA25
DATA26
VDD
VDD
DATA27
DATA28
DATA29
GND
DATA30
DATA31
DATA32
GND
VDD
VDD
DATA33
DATA34
DATA35
NC
GND
DATA36
DATA37
DATA38
VDD
DATA39
DATA40
DATA41
TMS
TCK
IRQ0
IRQ1
IRQ2
EBOO
T
RESET
RPBA
LBOO
T
IDO
ID1
ID2
GND
NC
NC
NC
NC
NC
NC
VDD
GND
VDD
NC
NC
NC
NC
NC
NC
GND
NC
NC
NC
NC
NC
NC
VDD
NC
NC
NC
NC
NC
NC
NC
VDD
GND
GND
NC
NC
NC
NC
NC
NC
VDD
NC
NC
NC
NC
NC
GND
GND
IC2001
ADSP-21061LKS-160
M5V_d
C2501
10
DDT1
D
ADD
DBCK
DDLR
M5V_d
3R3V_d
3R3V_d
5V
A
DFL3
M5V_d
R2092
100
DRD
DBMS
IC2072
TC74VHC541FT
5V
A
-
+
M5V_d
D8V
A
D-5A
D-8A
5V
A
M5V_d
C2303
100
C2302
0.1
R2304
1k
R2307
100
C2306
0.1
C2307
10
D8VA
D-5A
5VA
M5V_d
13
10
R2347
100
C2349
0.1
8 6
C2331
100
R2453
6.8k
TXS
D8V
A
D-5A
D-8A
5V
A
M5V_d
C2365
1000p
IC2371A
uPC4570G2
C2377
0.1
R2380
100
5VA
D-8A
D-5A
D8VA
L2402
100uH
C2405
10
C2406
0.1
to MAIN
unit J202
to MAIN
unit J201
DRD
C2362
0.0047
M5V_d
DFL3
W2201
3
5
C2345
0.1
R2348
100
M5V_d
>
6
4
5
IC2341B
TC74VHC00FT
R2424
100k
C2425
0.22
C2395
0.22
R2392
100k
TXS
R2385
1k
R2386
1k
C2387
0.0027
C2389
270p
IC2211A
M5218AFP
C2210
10
D-5A
C2035 1
C2502 0.1
C2503 10
C2504
10
C2033 1
C2034 1
C2478
1
R2224
470k
R2230
33
R2579
470k
C2311
0.22
C2480
10
D2372
MA8051
D2371
MA8051
90dBu input:158mVp-p
RX
USB
AM
FM
TX
MIC input
MIC VR
Trans Freq
Antenna input 60dBu
display
SG
14.300MHz
display
SG
display
SG
14.301MHz
14.300MHz
14.300MHz 1kHz 70% MOD
14.300MHz
14.300MHz 1kHz 3.5kHz DEV
1m Vrms
Center
14.300MHz
MEASUREMENT CONDITIONS
1.6Vp-p
25nS
40.8nS
3.3V
RX SG input
90dBu 0.25V
60dBu 0.6V
30dBu 0.95V
FM 380mVp-p
AM 384mVp-p
USB 384mVp-p
RX FM FIL1:4.4V
FM:4.6V
RX 90dBu input:200mVp-p
TX(1kHz) AM :780mVp-p
FM :740mVp-p
SSB :120mVp-p
3.7V
5V
162nS
5V
10.43uS
13pin
16pin
4.6V
4.6V
2.2V
RX AM 320mVp-p
USB 340mVp-p
FM 170mVp-p
TX AM
200mV
780mV
USB 100mVp-p
FM 1Vp-p
TX 4.2V
RX 0V
4.6V
27.6uS
monitor on
4Vp-p
2uS
500mV
2V
200mVp-p
2.4Vp-p
TX FM
SSB
AM
1mS
100mVp-p
TX,SSB
RX
11.3mS
400mVp-p
TX FM/AM/SSB:30mVp-p
RX 4.2V
TX 0V
3.2V
10-2 DSP BOARD