79
SCHEMATIC DIAGRAM
TH-D72A/D72E
X57-784 (C/3) 6/8
AD
AC
AB
AA
Z
2.2V
0.7V
2.3V
0V
2.4V
3.3V
3.3V
6.4V
3.3V
3.3V
2.8V
2.4V
0.7V
5.3V
TR_CLOCK
TR_DATA
LE_B
VHF_B
PS_B
33CB
33CB
TC&REF_B
33CB
SHIFT_B
VHF_B
33CB
VHF_B
SGL_B
MCH3914(7)-H
Q522
R572
100
C579
3p
L520
18n
D522
1SV325F
D520
1SV325F
L523
22n
C571
1p
C582
7p
R563
47k
D518
HSC277
D525
HSC277
D514
MA2S077G
D515
MA2S077G
C550
4.7u
1
0
C553
0.22u
3
5
R561
1k
C574
2p
R544
56
IC512
TC7660SEOA
1
BOOST
2
CAP+
3
GND
4
CAP-
5 VOUT
6 LOWVOLTAGE
7 OSC
8 V+
D511
RB751V-40
R559
10k
C551
1000p
C567
22p
R560
0
C566
470p
R565
18k
R564
100
C542
1000p
C545
1000p
C546
1000p
C523
0.01u
R524
22
C521
0.1u
R517
10k
R541
0
R542
0
R543
0
R547
820
R548
680
C549
1000p
R566
1k
C585
3p
C572
5p
C587
0.5p
C569
68p
C565
0.01u
R556
3.9k
R557
6.8k
C561
470p
R551
4.7k
C559
1000p
C581
470p
R569
0
C575
0.5p
C573
0.022u
L522
33
n
R567
2.2k
C576
39p
C584
9p
C583
12p
MCH3914(7)-H
Q523
R571
220
C588
1000p
R574
10k
R576
1k
R575
8.2k
R578
0
C590
1000p
R577
22
R573
47
C594
22p
R540
220k
R539
470k
C539
1000p
R538
470k
R532
0
C536
1u
C532
1000p
C520
1000p
R527
3.3k
2SC4617(R)
Q512
C534
0.01u
D513
MA2S111-F
R537
100k
C558
18p
C552
8p
D523
1SV278F
R545
1k
CP1
1k
L512
15n
L513
12n
L514
10u
C528
22u
1
0
R519
100
C515
470p
C511
10u
10
C526
10u
1
0
C524
10u
1
0
2SC5488A-H
Q524
R555
680
C517
470p
C527
3p
C531
6p
C533
0.01u
R568
8.2k
C563
10p
R550
2.2k
R554
2.2k
R552
2.2k
D517
HSC277
D516
HSC277
D519
1SV325F
L515
10u
L51
8
220
n
2SC5488A-H
Q521
C580
0.5p
D524
1SV278F
R562
47k
L511
390n
IC513
MB15E03SL-E1
1
oSCIN
2
oSCoUT
3V
P
4V
C
C
5D
o
6G
N
D
7
XFIN
8F
IN
9
CLoCK
10
DATA
11
LE
12
PS
13
ZC
14
LD/FoUT
15
P
16
R
CN511
C564
1000p
R523
0
R534 1k
C540
100p
L527
82n
L526
220n
L521
220n
L519
220n
L516
12n
L525
10u
C589
0.5p
C578
0.022u
D521
1SV325F
R570
22
L524
10u
L517
120n
C554
15p
C562
22p
2SJ347F
Q660
C557
3p
Q661
SSM6P05FU(F)
C548
1000p
Q518
RT1N141U-T111
C595
1000p
R579
0
R558
0
C547
0.22u
35
C512
10u
1
0
C513
10u
10
C514
10u
10
R528
0
R529
0
C530
470p
C541
10u 10
R536
1k
R581
0
C556
1000p
C529
10u
10
C544
0.22u
35
C522
1000p
SSM3J05FU-F
Q644
IC514
XC6201P532DR
1
VIN
2
NC1
3
VoUT
4
NC2
5V
S
S
6
NC3
X511
SHIFT_B
MOD
16.8MHz
CV_B
oUTPUT
VCC
GND
VC
VHF VCO
UHF VCO
VCO/PLL_B
DC SWITCH
SWITCH
Q518
FREQENCY
CONTROL
D519,521
BANB B VCO
MODURATION
D524
FREQENCY
CONTROL
D520,522
MODULATOR
D523
OSCILLATOR
AMP
RF
Q522,523
PLL SYSTEM
RF AMP
D516,517
SPEED UP
D514,515
5.3V AVR
DC/DC CONVERTER
Q644
Q661
D511
SPEED UP
D525
+B
+B
LDB
VTX
DC SWITCH
C57
7
0.47u
AMP
SWITCH
RF
RF SWITCH
SPEED UP
RF SWITCH
DC SWITCH
33CRF
TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION