Kenwood TH-D72A Service Manual page 75

F G
SCHEMATIC DIAGRAM
TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION
CN208 CN209
REVERSE
CURRENT
13.7V
PROTECTOR
J641 DC-IN
F641
4.0A
GND
CN641
F643
+
CN642
4.0A
-
BATT
DC_DET
C_S
LDA
REF_A
D643
CONSTANT
VOLTAGE
LDB
45C
D646
REVERSE
CURRENT
PROTECTOR
SWITCH
X57-784X-XX (C/3) C632
0-11 TH-D72A K 1000P
2-71 TH-D72E E NO
H
DC SUPPLY
D644
Q649
C648
SWITCH
TPC6110-F
1000p
L641
D644
L644
4.7u
RB051L-40
Q645
Q645
2SA1832(GR)F
SWITCH
IC644
DC/DC
CONVERTER
D647
CONSTANT
VOLTAGE
VOLTAGE
DETECTOR
IC639
XC6118C10AMR
R684
1M
SWITCH
Q642
2SK3019
DC/DC Reset
VOLTAGE SHIFT
D648
IC641
DA221
CHARGE
RT1P436U-T111
C655
IC641
LM3420-8.4N
470p
1 +IN 5
oUT
2 GND
Q646
3 NC 4
SWITCH
CoMP
CN636
CHG
Q648
SWITCH
AMP
Q648
Q643 2SK1830F
IC643
2SC5706
XC6201P152DR
SWITCH 1.5V AVR
Q653
CPH3417
R580
0
IC642
5 B+IN
GND
4
6 B-IN
A+IN
3
7 BoUT
A-IN
2
8 V+
AoUT
1
NJM2904RB1-ZB
OP AMP
D645
CONSTANT
VOLTAGE
I
TH-D72A/D72E
D649
SWITCH
CURRENT STEERING
Q650
2SJ506-E(S) L642 L643
R665
4.7u 4.7u
0.1
13.3V
R660
R666
10
0.1
SWITCH
10.8V
F642
10.5V C672
0.25A
Q656
DC_S
CPH6122
SAVE1
C668
Q652
SSM6L05FU-F
1000p
R663
R675
R670
470k 220
100k
DC CWITCH
IC645
XC6202P452DR
4.5V AVR
AVR
Q655
CPH6122
Q646
Q659
C693
UMX2N
1000p
R676
R673
1k
1k
AVR
CHG
Q654
SSM6J08FU(F)
B_S
A_S
SAVE1
PRE_CHG
IC646
3.3V
NJM2872F33
CHGEND
1 VIN 5
VoUT
2 GND
3 CoNTRoL
4
NoISEBYPASS
3.3V AVR
R662
C_S
0
33CS
J
33CRF
+B
LDA
45C
REF_A
REVERSE
CURRENT
PROTECTOR
D650
R639
0
CMS05-Q
C678
1000p
10.6V
B B
Q656
1000p
AVR
45C
Q658
UMX2N
C679
1000p
Q658
4.5V
AVR
33CA
33CB
3.3V
Q654
DC SWITCH
33CA
Q657
DC SWITCH
SSM6J08FU(F)
DC SWITCH
DET A
DET B
LDB
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