Icom IC-M803 Service Manual page 71

• MAIN UNIT (3/9)
3.8
0
J4401
L4402
R4402 L4401 0.27U
YGR
0.18U
10 C4404
C4402
22P
82P
100U
L4411
82U 220
L4421 R4424
J4421
0.0022 0.0012
C4424 C4425 C4427
HRX
1
10K
R4423
14V
1K
R4421
Q4421
2SC4213
8V
T8V
Q4422 Q4427
LDTA114YE LDTA114YE
MAIN UNIT(4/9) Q4423 Q4424 Q4426
LDTC143ZE LDTC143ZE LDTC143ZE
R4441
DSCT
560K
MAIN UNIT(5/9)
SLFS
Control voltage (V)
Frequency (MHz)
0.030000 ~ 1.999999 HB1S : 4.1
2.000000 2.999999 HB2S : 4.1
~
3.000000 ~ 4.999999 HB3S : 4.1
5.000000 6.999999 HB4S : 4.1
~
7.000000 ~ 9.999999 HB5S : 4.1
1000000 13.999999 HB6S : 4.1
~
14.000000 17.999999 HB7S : 4.1
~
18.000000 ~ 23.999999 HB8S : 4.1
24.000000 29.999999 HB9S : 4.1
~
Frequency is not set.
0
HB1S
HB1S
HB2S
HB2S
HB3S
HB3S
HB4S
HB4S
MAIN UNIT(5/9) HB5S
HB5S
HB6S
HB6S
HB7S
HB7S
HB8S
HB8S
HB9S
HB9S
14V
8V
R4428 1K
D4451
R4404
1SV308
Q4402
15
Q4401
LDTC143ZE
LDTA114YE
IC4401
C4409 R4406 C4410
4 1
C4406 GND IN
3 2
0.1 18 0.1
OUT GND
0.1
BGA616
HB1S
D4471
1SV308
HB2S
R4411
D4491
120
1SV308
1SV308
D4401 0.18U
0.27U
C4432 L4426 L4427
0.0022
C4430 D4421
1 C4434 HB3S
1SV308 C4437
39P
D4511
C4435 22P
1SV308
33P
HB4S
D4531
1SV308
HB5S
C4442
D4551
0.1
1SV308
HB6S
D4571
1SV308
HB7S
D4591 L4592
1SV308
HB8S
D4611
1SV308
HB9S
14V
8V
A5V
L4452 L4453 C4455 D4452
5.6U 4.7U 0.047 1SV308
C4453
270P
0.03~1.999999 MHz
1
L4472 L4473 3.3U C4476 C4479 D4472
C4631
4.7U C4473 0.001 680P 1SV308
C4477 C4485
100P
C4474
0.001 820P
100P
C4483
680P
2.0~2.999999 MHz
L4492 L4493 C4496 C4450 D4492
2.2U 2.2U 820P 0.001
1SV308
C4494 C4502
120P 680P
3.0~4.999999 MHz
0.001 0.001 0.001 0.001
L4512 L4513 C4515 C4519 D4512
1.5U 1.5U 120P 470P
1SV308
C4513
C4516
100P 560P
5.0~6.999999 MHz
L4532 L4533 C4535 C4538 D4532
1U 1U 470P 330P
1SV308
C4533
56P
0.001 0.001 0.001 0.001
7.0~9.999999 MHz
L4552 L4553 C4562 C4557 D4552
0.82U 0.68U 270P
220P
1SV308
C4553
39P
10.0~13.999999 MHz
C4576
L4572 L4573 C4578 D4572
0.68U 0.47U
270P 180P
1SV308
C4574
47P
14.0~17.999999 MHz
L4593 C4596 C4598 D4592
0.47U 0.39U 180P
150P
1SV308
C4594
22P
18.0~23.999999 MHz
L4612 L4613 C4615 C4617 D4612
0.27U
0.22U 150P 100P
1SV308
C4613
C4609
56P
39P
C4610
3P
24.0~29.999999 MHz
11-5
~1.599999 MHz 13.3
1.600000 MHz~ 0
HPOFS
Q4632
Q4631
LDTC143ZE
LDTA114YE
D4631 C4633 D4632
1
1SV308 1SV308
R4642 R4643
L4646
HPR8
2.2K
2.2K 100U
C4643
~1.599999 MHz 0
1.600000 MHz~ 6.3
10
C4644 L4642
0.1
C4648
0.1
LR-589
LDTA114YE
D4641 C4642
Q4641
2SC3356G
1SV308 0.1
LR-589 D4642
C4649
~1.599999 MHz 0
0.1
1SV308
1.600000 MHz~ 3.3
L4645
~1.599999 MHz 0
1.600000 MHz~ 2.6
R4695
C4695
0.1 560K
LDTA114YE
D4665
Q4661
L1SS400
MMZ1608Y102BT
R4662 R4665 EP4662 EP4663 R4673 R4676 R4680
2.7K 1K 2.7K
1K
MMZ1608Y102BT
R4663 R4666 R4674 R4677 R4681
1.8K 1.8K 1.8K
1.8K 1.8K
IC4661
C4662 C4666 R4669 C4672 C4676
4 1
GND IN
3 2
0.1 0.1
OUT GND
0.1 0.1 15
BGA616
EP4661 EP4664
MMZ1608Y102BT
MMZ1608Y102BT
5.4 3.4
5.4 0
Explanatory notes
TX Line
RX Line
Voltage Line
14V
8V
MAIN UNIT(2/9)
A5V
R4691
TXS
R4692 220
RXS
220
HPOFS
MAIN UNIT(5/9)
LDTC143ZE
Q4644
HPONS
Q4643
LDTA114YE
D4643
L1SS400
Q4642
C4635
HRRF
0.1
R4698
C4697
0.1
560K
LDTC143ZE
Q4663
MAIN UNIT(6/9)
LDTA114YE
Q4662
IC4662
ALC5V 5 1
VOUT VIN
2
R4683 VSS
4 3
NC CE
1K 2.7K
XC6209F502MR
R4684
1.8K
C4681 D4666 C4690
HTRF
1SV308
0.1 0.1
EP4665
MMZ1608Y102BT
DRIVE MAIN UNIT(1/9)
ALC MAIN UNIT(9/9)
13
0
Measuring condition:
(unless otherwise noted)
• Frequency: 12.23 MHz
• Mode: J3E (USB)
• RX: No signal is received.
• TX: No modulation signal is applied.
• Waveforms are measured by
an oscilloscope.
Voltage notation:
TX
RX Unit: Volt
RX