Kenwood TH-D72A Service Manual page 94

CN208 CN209
DC SUPPLY
REVERSE D644 Q649 SWITCH
CURRENT C648 TPC6110-F SWITCH
TX-RX UNIT : CONTROL SECTION 13.7V PROTECTOR 1000p Q650
J641 DC-IN F641 D644 L641 2SJ506-E(S) L642
L644
RB051L-40 4.7u 13.3V 4.7u
4.0A
X57-784X-XX (A/3)-CN731 GND R660
10
Q645
2SA1832(GR)F Q645
CN641
SWITCH
F643
+
CN642
4.0A
- IC644
TX-RX UNIT (X57-784X-XX)(C/3) : TX-RX SECTION DC/DC
D647 CONVERTER
BATT
CONSTANT
VOLTAGE
RXD_S TXD_S C _S REF_A
F642
CN621 C N622 C N 6 2 0 C N 6 2 3 0.25A
DC_S
SAVE1
R613 0 RXD_S
VOLTAGE
R615 0 TXD_S
DC_DET DC_DET DETECTOR
IC639 R663
C_S C_S XC6118C10AMR
VTX R684 470k
1M
MOD
LDA LDA
TC&REF_B SWITCH
B Q642
B B REF_A REF_A 2SK3019
D643
DC/DC Reset
VOLTAGE CONSTANT
VOLTAGE SHIFT
LDB LDB D648
45C 45C IC641
33CB CHARGE DA221 Q646
RT1P436U-T111
3.3V 4.5V
IC641 C655
LM3420-8.4N
470p
Q612 SSM6L05FU-F DC SWITCH 1 +IN 5
2 GND oUT
45RVA_S Q646
45RVA 3 NC 4
CoMP SWITCH
D646 CHG
DC SWITCH REVERSE CN636
Q613 CHG
SSM6L05FU-F 45RUA PROTECTOR CURRENT Q648
SWITCH
45RUA_S AMP Q648
CP13 Q643 2SK1830F
B_S 2SC5706 IC643
DC SWITCH XC6201P152DR
A_S L646 Q614 B_S
37 B_S AVSS 24 33CS SSM6L05FU-F 45RVB
1k 38 A_S AVREF 23
SWITCH 45RVB_S A_S
Q664 39 TR_CLOCK RXD_S 22 CP8
RT1N441U-T111 RST TXD_S 21
40 IC611
41 LE_A APCSW 20 100 DC SWITCH
78F0515AGKDXA Q611 SAVE1
42 XT1 TXD6 19 SSM6L05FU-F 45RUB SWITCH SWITCH 1.5V AVR
43 FLMDO RXD6 18
SUB MCU CP7 45RUB_S Q653
44 SCLK BTV_ON 17 CPH3417 PRE_CHG
R617
45 XOUT SAVE1 16
0 46 REGC CHG 15
X611 1k DC SWITCH R580 CHGEND
R610 11.0592MHz 47 VSS LE_B 14 Q615
48 VDD OCD1A 13 SSM3J05FU-F 45RVAM 0
10k IC642
C619
OCD1A 45RVAM_S 5 B+IN
0.01u CP6 GND 4
C620 6 B-IN A+IN
7 BoUT 3
10u R621 A-IN 2 C_S
8 V+
10k DC SWITCH AoUT 1
DC_S 100k CP2 Q616
33CB SSM3J05FU-F 33RB NJM2904RB1-ZB
3.3V OP AMP
PRE_CHG D645
47k 3.3V R629 33RB_S CONSTANT
VOLTAGE
470k
RST OUT CN612
FLMDO CN613
CN614
OCD1A CN615
VDD CN616
VSS
TXD6 CN617 APCSW
RXD6 CN618
OCD1B CN634 VAIP
CN635
RST IN UAIP
∗ ∗
R619 R620
X57-784X-XX (C/3) R619 R620 X57-784X-XX (C/3) C632
0-11 TH-D72A K 0 NO 0-11 TH-D72A K 1000P
2-71 TH-D72E E NO 0 2-71 TH-D72E E NO
33CRF 33CRF
33CRF 33CRF
+B +B +B +B
LDA LDA
2SC4617(R)
45C REF_A REF_A D432 Q433 AMP
Q433 2.5V
D649 REVERSE MA2S077G D432,D433 R455 BPFA
CURRENT SPEED UP 22
CURRENT STEERING PROTECTOR D433
R665 L643 R639 D650
MA2S077G CV_A
0.1 4.7u 0 CMS05-Q CN431
R666
D434,435
0.1 C678 FREQUENCY
CONTROL
1000p R442 R444 R446 R447 L435 D435 C464 MCH3914(7)-H Q435 1.1V
0.7V R465
0 680 680 680 10u 1SV325F 82p
10k 2.8V
C476 C481 C484 L447 C490
0.5p 47 Q436 22p 5p 22n 470p
2SC5488A-H Q437
RF AMP 2SC5488A-H
RF AMP
SWITCH
10.8V 10.6V D436 Q435
SPEED UP OSCILLATOR
R439
B B 3.3V 45RUA 45RUA
100k
10.5V C672 1000p Q656 R438 C473 R458
Q656 AVR X431 R440 0 1k
CPH6122 45C VHF VCO 5p 47
VC VCC 1k 0.7V
Q652 C668 3.9V
SSM6L05FU-F GND IC431
1000p Q658 oUTPUT APC&BPFB
R675 UMX2N PLL SYSTEM C483 L448 C487 1.8V
R670 C679 16.8MHz D437
220 3.3V 2.6V 220p 27n 470p
100k 1000p Q438 HSC277
0 C449 C452 C456 2SC5488A-H
DC CWITCH 4.5V Q658 R437 1p 5p R453 RF AMP
AVR C498 C440 22p C458 C465 15k
3p C444 C446 L432 L433 L434 C461 D437
1000p 1000p 1000p 18n 100n 12n 9p 10p 12p
C433 L431 C436 C439 Q434 Q434 RF SWITCH
0.01u 390n 0.01u 2SC5488A-H RF AMP
10u 10
33CA
IC645 33CB
XC6202P452DR
4.5V AVR
AVR 3.3V R388 VCO/PLL_A
Q655
CPH6122 100
R384 470k C388 C399
Q659 C535 3.2V 5p 9p A BAND IF
C693 UMX2N
1000p 1000p
R676 Q357
R673 1k 2SC4649(N,P)
RF AMP CF352 LO2_A
1k C382
AVR CN356
0.1u 3.3V BPFA
C376 R398
Q654 180p 22
SSM6J08FU(F) Q654 DC SWITCH C377
180p
A_IF1
2.7V 0.9V 49.95MHz
33CA
R402
IC353 XF351
Q657 DC SWITCH C405 270k C414 R409 R411 R412 C418
SSM6J08FU(F) FM SYSTEM
R383 0.1u Q358 0.1u 470 180 0 0.1u
R419 2SC4617(S) IF AMP
OP AMP 1.5k 120k
R356
1k CD351
DC SWITCH DET A 450kHz R390
IC646 DET A DET A
NJM2872F33 3.3V 2.7k
1 VIN 5
VoUT AM:4.5V
2 GND
3 CoNTRoL 4
NoISEBYPASS
B BAND IF
3.3V AVR
R662 APC&BPFB
CURRENT
0 STEERING AM:2.2V AM:2.2V
AM:1.7V R395
D351
R359 RB706F-40 C401 C389 CF351 0 C404
C361 C366 C369 C372 R378 R387
47k 9p
56p 0.1u 0.1u 0.1u 10k 4.7k 0.1u 0.1u
C363 Q352 Q354 Q356
33CS 0.01u 2SC4617(R) 2SC4617(R) 2SC4617(R) C380 R401
AMP AMP AMP
180p 22
SWITCH 3.2V
R360 C360 C381
180p
0 1u Q355 B_IF1
Q353 2SK1830F 45.05MHz
2SK1830F 0.8V
SWITCH 2.6V
R406
SWITCH XF352
R389 C408 270k C415 R410
1.5k 0.1u 470
IC354 0.1u Q359
FM SYSTEM R417 2SC4617(S)
IC352 100k
TC7W53FK(F) IF AMP
ANALOG CD352
SWITCH
DET B DET B 455kHz
R392
2.7k
LDB LDB LDB LDB
33CRF 33CRF
+B +B
BPFA BPFA
Q11
R10
10k RF AMP
Q7
RF AMP
1ST MIXER
Q2 VHF_A
3SK294-FP 2.7V L80
4.5V 2.2V 3.8V 2.8V
R3 C60 L25 L30 C89 C111 L51 L54 C137 L75 C163 390n
0 1000p 12n 390n L38 1000p Q7 3SK294-FP 1000p 18n 390n 1000p Q11 270n 1000p C167
4.4V 1.6V 3SK318
15n 4.4V 15p
C34 D42,43
RF SWITCH 2p
D6 L16 C48 C54 2.2V BPF TUNING
D12,13 D24,25
HSC277 82n 2p 1000p D32,33 SWITCH
BPF TUNING BPF TUNING BPF TUNING Q15
2SK1830F
BPFB BPFB
R11 Q8
RF AMP
10k
1ST MIXER
VHF_B
Q4 2.7V
4.5V 3SK294-FP 2.2V 4.4V 3.2V
2.5V
R4 C63 L28 L32 C94 C113 L53 L58 C141 L76 C162
12n 390n 18n 390n 270n
0 1000p L40 1000p 4.4V Q8 3SK294-FP 1000p 1000p Q13 3SK318 1000p
15n Q13
1.5V
RF AMP
C29
2p
L13 C47 C50 2.2V D14,15
82n D26,27 D35,36 D44,45
3p 1000p BPF TUNING BPF TUNING BPF TUNING BPF TUNING Q16
2SK1830F SWITCH
BPFA BPFA
TH2 Q10
NCP18XH103J0S RF AMP
R12
10k UHF RX
1ST MIXER
Q3 4.3V UHF_A
4.5V 3SK318 3.8V 3.4V L78
1.6V 2.0V 15n
R6 C64 L24 L34 C84 R135 C107 C120 C129 L74 C159
220n 39n
0 12p 270n 470p 0 Q6 1.9V 470p 2p L60 470p R134 0 Q10 470p C164
4.4V 3SK318 Q6 15n 3SK318
2p
RF AMP
D30,31
BPF TUNING
R18 C30 C38 1.4V D39,41
D10,11 D22,23
0 3p 470p D18,19 BPF TUNING Q14
BPF TUNING BPF TUNING BPF TUNING 2SK1830F
SWITCH
BPFB BPFB
TH1
Q9
RF AMP
R8
10k
4.4V UHF_B
Q1 3.0V 3.2V
4.5V 1.6V
R9 3SK318 C55 L23 L33 C82 R128 C105 C121 C126 L73 C160
0 470p 220n 270n 470p 4.7 Q5 470p 2p L59 470p R133 0 Q9 33n 470p
3SK318 1.6V 1.8V
Q1 4.4V 15n 3SK318
1ST MIXER
D28,29
BPF TUNING
Q5
R20 C25 C31 1.4V RF AMP
D38,40
0 2p 470p D8,9 D16,17 D20,21 BPF TUNING Q12
2SK1830F
BPF TUNING BPF TUNING BPF TUNING
SWITCH
LDB LDB
VHF RX
+B +B +B +B
L83
330n
C169
27p
Q644 Q661
DC SWITCH
DC SWITCH DC SWITCH RN4902-F
Q661
2.4V SSM6P05FU(F) UHF VCO
Q208
D523
AMP MODULATOR DC SWITCH Q209
3.3V Q512 SSM6L05FU-F
33CRF 2SC4617(R)
33CRF R563 C571
Q522,523
SSM3J05FU-F Q644 CN511 47k 1p
CV_B D520,522 OSCILLATOR
2.2V
FREQENCY Q522 DC SWITCH Q210
CONTROL 2.4V MCH3914(7)-H C594 SSM3J05FU-F
SPEED UP C582
Q518 L514 D522 C569 L520 7p C587 R573 22p
SWITCH RF
MOD R532 C536 SWITCH 10u 1SV325F 68p 18n 0.5p 47 Q524
D518 0.7V 2SC5488A-H
R519 0 1u RT1N141U-T111 Q518 HSC277 C565 2SK1830F
RF AMP DC SWITCH
100 3.3V 0.01u
IC512
TC7660SEOA
BOOST 1
8 V+ R570 L524 R204
CAP+ 2 R558 C580 22 10u 2.3V
7 OSC GND 3 D514,515 R562 100
D511 SPEED UP 47k 0 0.5p
R579 6 LOWVOLTAGE 4 MODURATION D524 BANB B VCO MCH3914(7)-H 2.9V
SPEED UP 0 5 VOUT CAP- 0V Q523
D514 R548 R555 L515 D521 C576 R201
DC/DC CONVERTER 0.7V
MA2S077G 680 680 10u 1SV325F 39p 22k
6.4V R541 D515 C578 C589
C201 C204
0 MA2S077G 0.022u 0.5p
5.3V AVR 1.5p 33p
IC514 5.3V Q201
XC6201P532DR R542 R543 2SC5488A-H
RF AMP
0 0 D519,521 D525
RF SWITCH
FREQENCY
CONTROL
VHF VCO
VTX VTX
C556
DC SWITCH 1000p D203
R537 Q660
100k 2SJ347F RF SWITCH
3.3V CP1
R529 1k
L81 X511 R534 1k 0
15n TC&REF_B
VC VCC 2.8V
D516,517 R222
GND RF SWITCH
2.8V
oUTPUT PLL SYSTEM L512 L513 D203 4.7k L207
15n 12n 15n
16.8MHz HSC277 Q204
1.3V 2SC5488A-H
C546 C551 C554 D516 D517 C562 C567 C574 RF AMP
C542
1000p 1000p 15p HSC277 HSC277 22p 22p Q521 2p
1000p 2SC5488A-H 0.7V
C541
C557 10u 10 RF AMP
3p
C523 L511 C533 R536
0.01u 390n 0.01u 1k +B
33CB
3.3V VCO/PLL_B
LDB LDB
CN205 CN206 CN207 CN210
+B +B
T:3.7V
R: 0V
144T
144T 144T
T:4.6V
R: 0V
430T 144T
VHF TX
T:4.4V
R: 0V
45TX
C308 C314
2p 2p
+B C264 D211 C273 L219 L221 L223 L234 L236 L239 L241 C297 D215 C303 L244 L246 L250
Q211
470p HVC131 470p 68n 68n 22n 1000p HVU131-E 1000p
RF RF
SWITCH SWITCH
D216
HVU131-E
RF
SWITCH
430T 430T C307 L230
IC202 1000p 36n
UPC3232TB Q215 RF AMP
D201 D204 R256 2SK3476-F
RF C243 4 VCC 3
HSC277 HSC277 SWITCH INPUT 12
RF 470p 5 GND1 2
SWITCH C212 C216 C223 R233 6 GND2 1 C248 L253 L212 C260 R257 T:7.3V
GND3 oUTPUT R:10.6V
10p 10p 1000p 18 100p 12n Q214 10n 470p 12
D202 NE5500234
HSC277 L202 L204 D205 RF RF AMP RF RF
SWITCH RF AMP SWITCH SWITCH
RF 22n 22n HSC277 F201
SWITCH RADIATION PLATE
R248 430T
VTX 10k
FINAL UHF TX
R220 33RB
100 45RVB
T:VHF:2.6V
T:UHF:3.0V C332
45RUB R:0V SWITCH RF
1.5p
C265 D212 C272 L218 C276 C278 C286 C289 L238 C295 L254 D217 C302
D5 R227 470p HVC131 470p 10n 6p 39p 27p 7p 100p HVU131-E 470p
RF
C224 HSC277 0 APCSW SWITCH
470p D7
DC SWITCH
HSC277 REVERSE
CURRENT RN4902-F Q212
PROTECTOR R251 144T 144T
470
APC&BPFB D209 MA2S728 R238
OP AMP R263 L227
D5,D7 AMP 68k IC203
RF C244 470p Q207 2SC4617(R) LMC7101BIM5 10k 220n
SWITCH R224 L231
220n
100
C233
470p
RF D220,222
SWITCH SWITCH RF
RF SWITCH
SWITCH SWITCH
C229
1000p IC201 CONSTANT D225,226
SWITCH Q205 VOLTAGE SWITCH
2SK1830F OP AMP D225 D226
R229
47k
02DZ15F-X,Y 02DZ18F-X
X57-784X-XX (C/3) C219
0-01 TH-D72A K NO
2-71 TH-D72E E 1000P
C326 C328
2p 2p ANT
L251 L252 R250
0
CN204
C311 C318 C323
7p 8p 22p
C312
470p