Icom IC-7410 Service Manual page 97

• MAIN UNIT (MAIN-6)
HV
8V
MAIN-2
D3301
2.15
DB2S31400 R3306
1k
VDL_
2.21
2.21
D3252 R3254
KDS4148U 100
R3302
IDL_
0
D3271
R3271
330
KDS4148U
NJM3403AV
ALC
Q3306
KTC2875
C3251
0.001
1.04
R3251
3.3M R3252 1.5M
9
R3262
ALCL_ 8
R3267
10
MAIN-1
1.5k
1.8M R3263 68k
ALCL_ IC3271
ALCL_
VDL_ NJM3403AV
R3268
VDL_
IDL_
470k
IDL_
MAIN-3
ALC
ALC
T8V
MAIN-2
T8V
ALC
EALC
EALC
IDLV
IDLV
IDHV
IDHV
REFL_
REFL_
FORL_
FORL_
MAMS
MAMS
MFMS
MFMS
NASBS
NASBS
POCV
POCV
ICCV
ICCV
HV
8V
D3302
KDS4148U
D3304
MAZ8036GL
8.5
8.7
I C3251
2
1
R3265
3
1M
NJM3404AV
R3255
2.2M
R3257 D3253
13
14
100k R3260 KDS4148U
R3258 D3254
12
68k KDS4148U
IC3271
NTCG16
NJM3403AV
6.43
R3289 R3284
220k
330k
R3275
R3297
IC3251 22k
6
MA2S7280G
220k
7
D3275
I C3271
6 5
7
R3298
5 22k
NJM3404AV
0
R3293 R3290
R3276
1.66
120k 330k
R3272
D3272
22k MA2S7280G R3285
4
100 R3266
V+
GND 8
IC3251
100
11 NJM3404AV V+
GND
4
IC3271
NJM3403AV
D3274 R3281 C3282 R3295 R3291
10P
KDS4148U 330 0 220k
R3286
2.2M
RF Pwr VR MIN
2 0.44
1
R3292
3
220k
KDS4148U
I C3271
D3277
NJM3403AV R3282
100k
Q3275
R3270
2SK3018
2.79
4.7k
Q3272
Q3271 KRA302E
0.0
KTC2875
Q3276
KTC4075
Q3305 R3287
KRC402
1k
R3305
Q3302
1M Q3301
KRC402
KRA302E
10 - 11
• RF-A UNIT (RF-1)
I C303
16 1
VCC STROBE
15 2
OE DATA
14 3
Q4 CP
13 4
Q5 Q0
12 5
Q6 Q1
11 6
Q7 Q2
10 7
QS2 Q3
9 8
QS1 GND
CD74HC4094M
EALC
I C305
16 1
VCC STROBE
15 2
OE DATA
14 3
Q4 CP
13 4
Q5 Q0
12 5
IDLV Q6 Q1
11 6
Q7 Q2
10 7
QS2 Q3
9 8
QS1 GND
CD74HC4094M
REFL_
R326
4.7K
R301
0
ATT ON 4.89V
8.59
8.77
IDHV
0.00
7.92
ICCV
Q481
2SD1664
R482
33
R483
3.3k
R484
D481
3.3k
R485
3.3k
R481
FORL_
KDS122
10K
Q482
0.01
2.89 KTC4075
3.09
0.01
POCV J451
14V
1
2
8V_
3
T8V
HRXS_
4
HTXS_
5
6
DRESL
7
RASTB
8
MDAT
9
MFMS MCK
10
11
ALC_
12
HAGC_
13
MAMS 14
+5V_
15
3R3V_
16
17
-12V_
18
19
+10V_
20
21
22
NASBS
4.90V
DRES_ HPR2S R351 _HPR2S
HPR1S R352 1K _HPR1S
RASTB_ HPOFS R353 1K _HPOFS
MDAT _ Q317 1K
MCK_ KRC404E
R317
B0 _B0
Q331
1K
KRC404E
R331
B7 _B7
Q319
1K
KRC404E
R319
B1 _B1
Q333
1K
KRC404E
R333
B8 _B8
Q325
1K
KRC404E
R325
B4 _B4
Q329
1K
KRC404E
R329
B6 _B6
Q321
1K
KRC404E
R321
B2 _B2
Q327
1K
KRC404E
R327
B5 _B5
Q335
1K
KRC404E
R335
B8W _B8W
Q323
1K
B3 KRC404E
R323
_B3
Q337
1K
KRC404E
R343
HATTS _HATTS
1K
R314
Q311 +8V
KRC404E
7.90
HIFOPS2
0.00 Q309 R316
Q312 KRC404E
HIFOP1S KRA302E
R315
+5V Q310
+14V KRA302E
+8V
+5V
R496
33
R492
Q491
33 2SD1664
R493
3.3k
R494
D491
3.3k
R495
3.3k
R491
KDS122
10K
Q492
KTC4075
HTXS
R8V
HRXS
R455 1
R456 1 +14V
EP456 MPZ1608S601A +8V
EP454 MPZ1608S601A
EP455 MPZ1608S601A HRXS
R454 DRES_
R451 100 RASTB_ R8V
R453 100 MDAT _ T8V
R452 100 MCK_
100
R459 0 ALC
EP452 MMZ1608B301CT HAGC
EP457 MPZ1608S601A
EP453 MMZ1608B301CT +3R3V
EP459 MPZ1608S601A -12V
EP458 MPZ1608S601A +10V
R457 HIFOP1K
R458 10K HIFOP2K
10K
4.29 10.08
3.29 -11.87
PRE PPF :4.90V
PRE 1 ON: 4.90V
PRE 2 ON: 4.90V
J301
HPOFS
1
HPR1S
2
HPR2S
3
B0
4
B1
5
B7
6
B3
7
B8
8
B8W
9
B4
10
B5
11
B6
12
B2
13
HATTS
14
8V
15
14V
16
GND
17
5V
18
R8V
19
T8V
20
0
10K
10K
RF-2
B8W
B8W
B5
B5
B8
B8
_HIFWS
_HIFOP2S
_HIFOP1S
+14V
+8V
+5V
HRXS
R8V
T8V
ALC
HAGC
+3R3V
-12V
+10V
HIFOP1K
HIFOP2K