Kenwood TH-D74E Service Manual page 52

TX-RX UNIT (XC1-138E-01) 2/7: TX-RX
R152
E-01
100k
10
9
8
7
33CAS
6
CN661 TL2
+B 1 DET2
2 DET1 DET1
+B 3
4 DET2
TCXO_VCON 33CS
TCXO_VCON 5
6 CURR CURR
40C 7
8 SQA SQA
40C 9
10 GND
RAINT 11 12 BPFA BPFA
47C 13 14 AFA R665 100
AGCB
AGCB 15 16 SMA SMA
IFB 17 18 LDA LDA
/PLL_A
AFB_FM 19 20 PRHOTB PRHOTB SDATA_A
SQB SCLK_A
SQB 21 22 PMO PMO
5
SMB
SMB 23 24 LDB LDB
I2CCK
I2CCK 25 26 /RST_R
I2CDT
I2CDT 27 28 GND
I2CCKR 29 30 GND
I2CDTR 31 32 GND
SCPU_TXD 33
34 BFMS
SCPU_RXD 35
36 VINOK VINOK
/S_RST 37 BAT_DET
38 BAT_DET
40CS 39 33RAS
40 VDCIN VDCIN 33RAD AVR
40CS
33SS 41
42 PO_SWO PO_SWO
IC593
Freq 43 44 AGCA/APC AGCA/APC BU33TD2WNVX
3.3V
VCOMOD 45 46 VBAT VBAT 33RAD 40C
VoUT
VCOMOD VIN
BPFB 47 48 NC
BPFB
33RAD 49 50 +B1
Freq GND
STBY
BFMS
4
A-BAND Audio
B-BAND 12kHz IF
B-BAND Audio
CONT UNIT/DAC BUS
40C
TL581
33SS
TL580
AND SW
IC582
3.3V
BU33TD2WNVX
TL588
33S
STBY
GND
8 7 6 5
VIN 33S
VoUT
3
1 2 3 4
33S AVR
R669
220
SW
8 7 6 5
Q661
LTC043ZEBFS8
X661
11.0592MHz
L78-1426-05
1 2 3 4
SDATA
SCLK
AND SW
2
1
A B C
(No.RA044<Rev.001>) 2-2
3.3V 3.3V
33CB AVR
2.6V B VCO
IC578
BU33TD2WNVX CN401
CV_B 2 1 VCO2
STBY
GND
GND 4 3 33BF
RIPPLE FILTER
GND 6 5 UCW_VCO
Q375
33CB DSC9A01/T/ 33BF GND 8 7 VCO1
VIN
VoUT
VCO_MOD 10 9 SHIFT_B
C415
GND 12 11 GND
C420 33p
NC 14 13 GND
Q365
10p
VCO_B 16 15 GND 2SC5108FT/Y/
D376
SPEED UP
RF AMP
VCO-B
(XC1-0138 4/7)
CN400
DIVIDER
C470 VCO_MOD
1u
TL361
CV_B
R403 R397
L380 470 0
SW R396
R64
4.7k
Q391
2SC4617/R/
5C
5.3V
3.3V
6.6V DCDC 5C AVR
33CA
R489
40C 7.5V IC363
22 XC6201P532D-G A VCO
4 3 2 1 1 2 3
33CA AVR 5C
CN501
IC581
Fin_A 2 1 VCO_A
BU33TD2WNVX
GND 4 3 GND
STBY GND
GND 6 5 GND
5 6 7 8 6 5 4
NC 8 7 GND
GND 10 9 33CA
VIN VoUT C560
GND 12 11 GND
0.47u
GND 14 13 GND
CV_A 16 15 SHIFT_A
VCO_A
CV_A TL362
33CA
R490 R486
L414 VCO-A
0 470 CV_A
(XC1-0138 3/7)
CN500
LOOP
FILTER
33C AVR
IC580
BU33TD2WNVX
R478
STBY GND
270
R476
10
3.3V
24 23 22 21 20 19 C547 0.01u
VIN VoUT
5C R485 C548 100p
1 18
C545
10 PVDD
2 CPVDD RFINP 17
PLL C549 100p 1000p
3 TEST4 IC364 RFINN 16
RA361
TEST1 AK1541 VREF2 C550 0.22u
4 15
/PLL_A LE DVSS
SDATA
5 DATA VREF1 14
SCLK C551
6 CLK 13
100
0.22u
7 8 9 10 11 12
C508 100p
R457
LDA R482
X362 100
L77-3109-05
1k
VCON C523
3p
33RA AVR R458
R484 330k
C531 L405 C521 R459 C518
IC579
BU33TD2WNVX 10
0.01u 390n 0.01u 3.3k 1000p
STBY GND
19.2MHz
33C
3.3V
33RA
VIN VoUT
33RA
33CB R303
R358
A_AUDIO
C312 47k
0
R307 0.1u
680k 10
R313
3.3k
R305
220k
SQA R304
0
TH285
R673 SMA NCP15XV103J03
10k -t
RSTNA
/IF_CS_A
SCLK_A
SDATA_A
33CB
B8 B7 B6 B5 B4 B3 B2 B1 A8 A7 A6 A5 A4 A3 A2 A1
LDB
C1 H8 RA660
33IFS
C2 H7 33RBS
PF0-oSC_IN PB12 33RAS SDATA_B
C3 H6 33BVS
C4 PF4 PB11 H5 SCLK_B
RK74HB1J101J
C5 PB7 PC5 H4 /IF_CS_B
PC12
PB5 R659 144TS
C6 PC4 H3
PA10
100
C7 PA7 PA1 H2
PA9
C663 1000p
C8 PA11 SUB MPU PA4 VDDA H1
C665 0.1u RA670
33BUS
D1 PF1-oSC_oUT PB13 G8 RSTNB
IC661 33CBS
33CAS
D2 PF5 PB10 G7
33CS
D3 PB6 PB2 G6
RK74HB1J101J 45TXS SQB
D4 VSS1 PB1 G5
RA669
D5 VSS2 PA6 G4 /P_A_PD2 TH286
PF6 UCW_VCO SMB NCP15XV103J03
D6 PA3 G3
PA8 VCO2
PA0 G2 VCO1 -t
D7 PC9
PC3
RK74HB1J101J
D8 G1
C375 C374 R352 C372
E1 E2 E3 E4 E5 E6 E7 E8 F1 F2 F3 F4 F5 F6 F7 F8 R670
0.1u 10 270p 10k 0.1u 10
2.2k
R353
12k
460.8kHz
IC286
BU7295HFV
X251
460.8kHz
GND oUT C371 L7H-0066-00
IN-
TL586 0.01u
oE
VSS
R351 VDD
VDD
IN+
22k
GND
C373 CLK
TL585
0.01u 25V
/S_RST
IF AMP
SUB CPU BUS
D E F G
40C DCDC
IC584
33BV AVR 33BU AVR 4.0V
40C L577
VoUT_1 VIN_3
IC577 IC576
VoUT_2 VIN_2
GND STBY VoUT_3 VIN_1
STBY GND
PG NC
3.3V FB EN
33BU
VoUT VoUT VIN
VIN
3.3V
BU33TD2WNVX BU33TD2WNVX
33BV
DC SW Q388
EM6M2
33TX
C482 DC SW
D383 CONT UNIT/DAC BUS
7p R368
100 Q576
RF SW 430T 430T
L381
12n 430TS
C386 C182 TX
DC SW 15p 39p Q577
C382 R398 C408 D365 C397 EM6M2
DC SW
3p 12 1000p 1SS390 100p 430TS_
47C Q577 2SA1774/R/
RF SW 144T
SSM3K15AMFV
144TS
Q13
DC SW
Q390
LTC043ZEBFS8 RF AMP
L382
RF AMP 39n
C414
R62 33RB
1000p C402 C476 C477 D364 D364,361
R385 2.2k
0 RF SW
1000p 4p 1000p 1SS390
T:4.6V
1 2 3 4 C409 D361 L394
R:0V
5p
10n
1SS390
Q363 C385 C383
Q14 ATT
2SC5108FT/Y/ D40
68p 1000p
1SS400CM
144TS
220TS
8 7 6 5 SW D41
C399
EMD3
1000p
Q362 1SS400CM 220TS
RE1C001ZP DC SW
R393 D40,41
1k LPF
SW
D36
FROM VCO
D363,362
1SS390
D36,33
RF SW
220
RF SW
L367 L366
18n 18n
C413 C407 C401 D363 D362 C391 C387
RFINP
3p 22p 3p 1SS390 1SS390 3p 1000p
Q364
VHF
2SC5108FT/Y/
D35
RF AMP D35,32
1SS390
RF SW
220
+B
+B1
SUB CPU BUS
5C
R451
SW
1k
Q377
RE1C001ZP
Q379
RE1C001ZP
CURR
SW
C486
6p
C491 L392 C484 L393
22p 27n 33p 2.2n
D378 C495
1SS390 9p Q376
2SC4726(P,Q)
RF SW
RF AMP
CONT UNIT/DAC BUS
RF SW
R444 SUB CPU BUS
2.2k D38
1SS390
47C
IC589
BD00GA5WEFJ
R581
EN
NC1
1k
NC2
C505 L398 GND
C515
NC3
470p 27n FB
10p Q380
VCC
2SC4726(P,Q) VoUT
RF AMP
C586 1u
R448
R408
100 47C AVR
57.6MHz
0
C501 C493
R449
C511
330k
10p 3p 12p
R407
Q382 Q378
2SC4915-F 2SC4915-F
0
RF AMP RF AMP
1stLO(A-BAND)
R294
33RA
C309
680
10u 6.3
MCF
C310 C308
C299 R295 C298 C297 R291 A-BAND 57.15MHz
0.1u 0.22u 10 XF281
16V
0.01u 0 10p 0.01u 270k L7B-0014-00
C294 R290 R289 C290 L283
8 7 6 5 4 3 2 1
C303
0.01u 330 120 0.01u 560n Q281
100p
Q282 BB506CFS-H
9 32 2SC5108FT/Y/
LoIN R287
LoCAP 31 C304 100p
10 BIAS
C305 2.7k
NRECTo AGNDIN 30 C287
11
NAMPo 1u 10
AGNDoUT 29
12 IC281 0.5p
NAMPI C306 IF AMP
AK2365A AVSS3 28 1u 10
13 AUDIooUT
C307 IF
DISCoUT VREFD 27
14 PDoUT (A-BAND)
DVSS 0.22u 10 1ST
15 RSSIoUT 26
DVDD MIXER
C301
16 25
0.1u 16V
17 18 19 20 21 22 23 24 C302
R299
10u 6.3
100k
R314
100k 5C
R315 SWIN
100k CPZ
CP
LF_SW
RFINP
DC SW
MIX
IC283
MCF
UPC2757TB-A
B-BAND 58.05MHz
LoINPUT
PS
XF282
L7B-0015-00 GND
CPVDD VCC C321
RFIN C330 L290 C329 C328 R320 R319 C324
DVDD RFINPUT
IFoUTPUT
AVSS1 0.01u 470n 12p 0.01u 330 330 0.01u 0.1u
ADVDD 10
IFoUTP C323
R340 LD
DETo/SDATAoUT IFoUTN 3300p
100k
MIXVDD IFIP
AGC_KEEP
SDATAIN AVSS2
IC284
C333
SCLK AK2400 Lo2NDIN 33IF AVR 33RB AVR
RK74HB1J104J 100p
CSN TRIoUT IC590 IC583
RA341
BU33TD2WNVX BU33TD2WNVX
AD_CSN REFIN
STBY STBY
AD_SCLK NC1 GND
IF
AD_SDo NC2 (B-BAND)
RSTN NC3 3.3V
R344 PDN NC4
VIN VIN
VoUT
100k
R348
0 BUFFER
(A-BAND)
R322
680k
3rd MIXER R331
C322 R347 R264 R265
R334 1M 1k 100k
0.01u 1k C356
50 0.01u 220k
1 2 3 C342
C352 270p 8 7 6 5
1000p
C353 270p
R338 R335 C349 R333
5 4
C360 10k 0 56p 3.3k
0.1u 1 2 3 4
R363 16V
R262 R263
C368 47k C363
10k 220k
0.1u 10 R367 0.1u 10
10 R69
27k
H I J
L581
8.3V 8.4V
TL601 2.2u
+B L583 L582 +B1
4.7u
+B1
OR CIRCUIT
L576
PULSE
GENERATOR 3.1V
SPEED UP
C632 OR CIRCUIT AND SW AMP IC586
0.1u XC6701B312E-G
R588
D580 VoUT
IC588 IC592 IC587 VIN
RB531SM-30 100k
TC74VHC123AFK TC74VHC32FK TC7WH08FKJC NC1
IC591 VSS
R606
1A 1A 1A BU7295HFV CE
VCC VCC VCC NC2
100k
1B 1B 1B oUT
1RX/CX 4B 1Y IN-
C630
1CLR 1Y 2Y
1CX 4A 2B VSS
0.1u
1Q 2A GND VDD
1Q 4Y 2A IN+
31BU AVR
2Q 2B
2Q 3B
C660 C637
2CX 2Y C381 0.1u
2CLR 3A
0.1u R637 0.1u R625
2RX/CX GND
2B 3Y Q585
10k 47k
GND LTC043ZEBFS8
2A
C633 0.1u
T:4.6V
R:0V
Q584
LTC043ZEBFS8
T:4.5V
R:0V D579,580,583
Q584,585
OVERVOLTAGE
INVERTER
PROTECTION
D39
REVERSE
CURRENT
PROTECTOR
430T
430T
144T 144T
144T
220T 430T
220TS 220TS
REVERSE
144TS 144TS
CURRENT
430TS Q9 430TS R70 PROTECTER
430TS_ RE1C002ZP T:4.2V 100k
47PDT
144TS_ R:0V C63
R35
Q9,10 68
ATT C64
D29,30 SSM3K15AMFV
DC SW 8.3V Q11
SW Q11
+B
DC SW
VTX1 D29 R60
RB531SM-30 4.7k
CKY D30
E2D-0022-00
RB531SM-30
L54 390n
430TS
C16
L53 RF AMP
C128 D31 5.6n 22p
R42 C136 IC1
D33 C142 12 470p 560p RN142SM
UHF GND1 RF AMP D26 Q2
RF_oUT C113 L57 RN142SM
1SS390 1000p 2SK3476-F
GND2
GND4 L44 15n
C126 27n 560p D22 C102
RF_IN RN142SM 1000p
GND3 F1
100p L45 D22,26,31
F0B-0097-00
AG303-63G 27n
2dB ATT RF SW
R13
RF AMP
22
C153 C148 Q4
D27,28 SSM3K15AMFV
D27 R30 L30
4p 4p 144TS
L48 L47 D32 144TS_ SW 1SS400CM
22k R19
47n 47n 1SS390 4.7k
D28 SW
430TS_ 144TS_,430TS_
Q5 SW
1SS400CM
220TS_
ATT +B
220TS_
DMA56100
+B_ +B_ +B_ +B_
R39 1.8k
Q8
LTC043ZEBFS8
R74 Q7
45TXS
33k 2SC4617/R/
DC SW
SW
8.4V
APC
R31
100 Q12
+B1 2SC4617/R/
3 2 1 C145
470p
ATT
4 5 R7
C149
+B_ 10k
1000p
APC
4.6V
R177
22
BPF
RF SW A-BAND
C181
410-470MHz
D173 C183 0.75p
C180 R178
470p 22
RN262CS 10p
Q171 L173 C175 C174
BB506CFS-H
47n 470p 8p
D172,171 RF AMP
BPF TUNING
DC SW R211
Q582 22 B-BAND
RF SW
EM6M2 BPF 310-524MHz
D179 C201 L180 C198 0.75p C278 R260
5.6n
RN262CS 22p 470p 22
L202 C206 C203
Q192
BB506CFS-H
47n 470p 8p
33RAS
RF AMP
D178,177
BPF TUNING
OAGCA/APC
R209
BPF 22
A-BAND
RF SW
136-174MHz
D185 C227 C226 C225 216-260MHz
C281 C185 R210
470p 470p RN262CS 5p 2p 470p 22
Q178 L187 C220 C219 L214 C234
BB506CFS-H
220n 1000p 56p 10n 1000p
OBPFA
D184,182 RF AMP
OAGCB BPF TUNING
R277
22
RF SW BPF
B-BAND
C202 D192 C244 L194 C239 C279 R278 108-310MHz
470p RN262CS 100p 15n 2p 470p 22
Q193 L205 C249 C245
BB506CFS-H
220n 1000p 1000p
Q182
LTC043ZEBFS8
RF AMP
OBPFB
D191,189,188
BPF TUNING
R164
RF AMP
0
P171
G0B-0067
3.3V
GND
VoUT
MW/SW(XC1-0138 5/7)
CN181
BUFFER
(B-BAND)
OBPFB
R270 R271
1k 100k
8 7 6 5
1 2 3 4
R268 R269
1k 100k
K L M N
F577
SW SW
Q580 FZA10BQ-3R15
L580
HS8K1 L579 Q579 LR79Z0HQ2R2M 3.15A L584 DC_IN 1 J576
R615
0.01 2.2u
GND 3 DC IN
C628
2
0.1u
UT6K3
L588
D587
SURGE
PROTECTION
R616 L585
270k
D587
RB160SS-40
SW TL576 S
TL600 TL587
F576
IC585
NCP1871 Q581 FZA10BQ-4R0 L578
TL577 + BATT
4A
R618 -
TL578
0.01 L586
ACSP LSDRV
C654
UT6K3
RBDRV BATTERY BCSP L587
0.1u
CHARGER
VIN BCSN REVERSE
VOLTAGE
VSEL BATDRV
PROTECTION
VINoK VBAT
R603
100k
TRIPLEXER
P1 ANT
UHF
C28 E2D-0022-00
D18,19
4p C7
RF SW 4p
1p C23 C13
L13
C59 C54 10p 15p
18p D42 D18 12.2n L3
15p 470p RN142SM RN142SM 12n
D43 D19 SURGE
RN142SM RN142SM PROTECTION
D42,43
P2
RF SW
TO RX
ATT
D8,9,11,12
RF SW
D13-14,45
RF SW
ATT
VHF RN142SM D45 C11 C40 C34 C29 C24 C14
RN142SM 0.1u 9p 6p 10p 6p 10p
L28 C55 C51 D13 L16 L14
L20 L9 L6
27.4n 82p 1000p 33.6n 51n 33.6n 22n 22n
D14 C44
1000p
TO RX
C43 C38 C30
27p 10p 10p
D2
D4
RN142SM
RN142SM D2-5
D5 D3 RF SW
RN142SM RN142SM
TO RX C19 10p
C9 18p C3 6p
C20
3p
DETECTOR DETECTOR
R6 D17 D10
47k
EDZV18B EDZV18B
47C
R67
1.5k
L212 R189 RF SW
15n C191 22
L176 C158 L200 C186
470p Q172
BB506CFS-H
33n 8p 27n 470p
RF AMP
LTC043ZEBFS8
Q194
SW
SW
Q174
LTC043ZEBFS8
AUS
SW
BUS
D175
DAN222WM
Q173
SW
LTC043ZEBFS8
Q175
LTC043ZEBFS8
SW
L183 C208
C217 D181 C216
47n 1000p
5p RN262CS 1000p
RF SW
Q177
LTC043ZEBFS8
SW AB220S
R199
RF SW
22
L190 C218
Q179 L179 C215 C213 C211
BB506CFS-H
220n 220n 100p 27p 33p D180 1000p
RN262CS
SW
RF AMP ABVS
Q176
LTC043ZEBFS8 AVS
D186
DAN222WM
BVS
SW
SW
SW
SW
O P Q