Kenwood TH-D72A Service Manual page 79

Z
TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION
+B
3.3V
33CRF
SPEED UP
MOD
R519
3.3V
100
8 V+
7 OSC
D511
6 LOWVOLTAGE
R579
SPEED UP
5 VOUT
0
6.4V
5.3V AVR
IC514
XC6201P532DR
X511
TC&REF_B
VC
VCC
GND
oUTPUT
16.8MHz
33CB
LDB
AA
SCHEMATIC DIAGRAM
Q644
DC SWITCH
2.4V
AMP
Q512
2SC4617(R)
Q644
SSM3J05FU-F
R532 C536
0 1u
IC512
TC7660SEOA
1
BOOST
CAP+
2
D514,515
GND
3
SPEED UP
4
CAP-
D514
DC/DC CONVERTER
MA2S077G
R541 D515
0
MA2S077G
5.3V
R542 R543
0 0
R537
100k
3.3V
R529
R534 1k
0
C542
1000p
C541
C557 10u 10
3p
C523 L511 C533 R536
390n
0.01u 0.01u 1k
3.3V
AB
TH-D72A/D72E
Q661
DC SWITCH
Q661
SSM6P05FU(F)
D523
MODULATOR
R563
47k
CN511
CV_B
D520,522
FREQENCY
CONTROL
Q518
L514 D522
RF
SWITCH
SWITCH
10u
1SV325F
D518
Q518
HSC277 C565
RT1N141U-T111
0.01u
R562
47k
BANB B VCO
MODURATION D524
D521
R548 L515
R555
680 680 10u
1SV325F
D519,521
FREQENCY
CONTROL
C556
DC SWITCH
Q660
2SJ347F
CP1
1k
D516,517
RF SWITCH
PLL SYSTEM
L512
L513
15n 12n
C546 C551 D516 C562
C554 D517
22p
1000p 1000p 15p
HSC277 HSC277
VCO/PLL_B
AC
UHF VCO
C571
Q522,523
1p
OSCILLATOR
Q522
2.4V MCH3914(7)-H
C582
R573
C587
C569
7p
L520
18n
47
68p
0.5p
0.7V
L524
R570
2.3V
10u
22
R558 C580
0 0.5p
MCH3914(7)-H
0V
Q523
C576
39p
C578 C589
0.5p
0.022u
D525
RF SWITCH
VHF VCO
1000p
2.8V
C574
C567
22p
2p
Q521
0.7V
2SC5488A-H
RF AMP
X57-784 (C/3) 6/8
AD
+B
2.2V
C594
22p
Q524
2SC5488A-H
RF AMP
VTX
79