Kenwood TK-2107G Service Manual page 49

TX-RX UNIT (X57-6020-10)
C25 R28
470p 0
X1
L77-1877-15
12.8MHz
T:5.0V
R:4.9V
C5
R29 4.7u6.3 R3
0 10 CV
R11
47k
C4 VR1
68k
UNLOCK
DETECT
0.1u
D7 R2 R5 R7 R10 R13 L7
MA2S111-F 1k 0 0 150 150
L2
C24 R16
8.2u
680p 68k
R:4.8V
PHASE LOCKED
LOOP SYSTEM L5 R14
560n
IC1 100 C28
MB15A02PFV2E1
33p
R8 C19 L16 L17
330k 0.01u 220n 220n
TRIPLER
CP1
1k*4 Q1
2SC4649(N,P)
R:0.7V
TO
RX
PABC
SB
R406 2.2k
5RC
Q402
DTA114YEB T:5.0V
T:4.9V
DC SW R:0V
R:5.0V
L401 C414
1000p
DC SW
Q406
FP210
EEPROM
VOLTAGE REGULATOR T:7.4V
IC401 T:5.0V T:5.0V R:7.5V
AT24C08BN-SH R:5.0V R:5.0V IC404
XC6201P502PR
R411 R407 R424 R425
1 8 R540 220k 1k
5M VOUT
A0 VCC VIN 3.3k 3.3k
VSS
2 7 0
A1 WP
3 6
A2 SCL
4 5
GND SDA C412 DC SW DC SW
R401 R405 10p DC SW
BEAT
SHIFT SW Q405
T:1.9V
100k 1k UPA672T-A
Q403 T:0V
DTC144EE T:1.9V R:4.4V
RESET SW
R:1.9V
IC400
BD4840G-TR
VOLTAGE DETECT
T:5.0V
4 3
NC1 GND R:5.0V IC402 C415 R412 L403
2 5M
VDD R3111N451C-F
10p 10 220n
5 1 R404 1 5
NC2 VoUT
oUT NC2
0 2 5MS
VDD
3 4 SAVE
GND NC1 5TC
WNRC
VCCN
T:4.5V 5.0V
R:4.8V T:2.3V
R:2.3V C420 C422
R6 C418 0.01u 0.01u C425
R417
WNTC
1k 0.01u 0.01u
10
LED TX LED BUSY
50 26
51 25
DC SW DC SW MONI
R:5.0V R:5.0V
Q400 Q401 SELF T:4.9V T:0V
DTC114EE DTC114EE DT
CK RXD
TXD
LE PTT
R418
MCU TO 2.2k PTT MONI
5MC BEEP
AFCO
IC403
RX 38268MCA060GU
GLED R502 C503
RLED
R:4.7V T:0V SAVE APC 82k 0.033u
T:0V R:4.6V MUTE VCCN
5RC R413
5TC BATT 1k
BUSY
TI
CHANNEL SWITCH TIBI
C533 0.1u
POWER SWITCH VC2 R500 R501
R513 15k
AUDIO VOLUME VC1
75 1 4.7k 4.7k
76 100
CN400 5.0V
10 ENC2
L400 C413 L402
9 ENC3
8 SB 220n 1000p 220n
7
6 B
5 ENC1 WNTC
4 ENC0
3 TO VOLUME
2 TO AF AMP
MUTE
1
R430
AFCO
100 RX
R431 SB
0
RF AMP
Q2
2SC5108(Y)F
C48
10p
L8
VCO TX
6.8u
Q4
T:2.4V C32 2SK1875-F(V)
R:2.4V D1,2
100p
FREQ.
T:0.6V
CONTROL
R:0V
L6
C44
6.8u
0.5p
D5
TX MODULATION
R17
100k
L9 VCO RX
Q3
2SK1875-F(V)
6.8u
D3,4
C33
MOD MOD FREQ.
CONTROL 39p
L15
6.8u
T:0V
R:4.8V
5C 5C
2nd Local 2nd Local
TO
RX RX
PABC PABC
5R 5R
5T 5T
T:4.9V
R:2.2V C305 R303 C301
0.01u(J) 3.3k
0.018u
Q408 R317 AUDIO AMP
ACTIVE FILTER
DTA123JE T:0V
DC SW R:4.9V 270k(D) IC300
NJM2902V-ZB
B B R312
12k 1 14 R304
T:7.4V C309 2 13 1M
R302
R:7.5V
0.01u(J) 3 12
5.6k
4 11
VDD VSS
5 10
C312 C316 6 9
0.01u(J) 0.01u(J) 7 8
R340 R:1.8V
R321
120k(D)
R307
22k
47k
C321 C320
Q300
2SC4617(S) Q303
0.033u(J) 0.033u(J)
DTA144EE
ACTIVE R326 R:2.1V
DC SW
FILTER
5.6k(D)
W:4.8V
N:0V
TP3
AUDIO
MUTE SW
Q302
R:3.8V
2SK1824-A
WNRC WNRC
TIBI TIBI
5MS 5MS 5MS
TI TI TI
BUSY BUSY BUSY
R548 B
3.3k APC APC APC
TXD TXD TXD
PTT PTT PTT
ACTIVE
FILTER
Q501
2SC4617(S)
T:2.7V
R508 C507 R510
1k 2.2u4 3.3k
C504 C505 R506
TO
4.7u6.3 1u 820
R503
VR500 6.8k
68k
TO TO
B B
WNTC WNTC
TO VOLUME TO VOLUME
MUTE MUTE
AFCO AFCO
RX RX
SB SB
TO AF AMP TO AF AMP
T:1.1V
R:0V
R107
RF AMP T:2.2V T:2.9V
T:2.5V R:1.0V R:0V 3.9k
RF BUFFER AMP RF SW
R:2.5V Q100
Q6 2SC5108(Y)F C103 D100 C104
Q101
2SC5108(Y)F C47 C100
2SC4988-E
22p HSC277 1000p
33p 15p TX PRE-DRIVE
R:0V
T:0.4V
DC SW
Q5
2SJ243-A
DC SW
Q7
UMC4N
L14 RF SW
R27
T:0V
R:4.2V 1k
RIPPLE FILTER T:0V
R:1.7V
Q8 T:4.2V
2SC4617(S) R:4.2V
T:0V
R:4.3V
CURRENT
STEERING B
2nd Local 2nd Local
PABC PABC
5R 5R
5T 5T
R:4.8V
2nd IF 450kHz
R200
10
R201 C205
1k 390p
R202 C206
R320
390k 330p
47k
ACTIVE
FILTER IF SYSTEM
IC301 IC200
NJM2904V-ZB TA31136FNG
C303
1 8
0.1u V+
2 7
R:1.1V
R311 3 6 R318
QT/DQT
0 4 5 180k
GND
C338
56p
R323
100k
D300
DA221
R:2.0V
LIMITER
R:2.0V 5R
AF AF
TIBI
5MS 5MS
TI
BUSY BUSY
B B
APC APC
TXD TXD
PTT PTT
Q504
DTA143ZEB
ACTIVE MIC AMP/LIMITER
T:3.0V T:3.0V
FILTER IC500
R524
R514 Q502 R519 NJM2100V-ZB
2SC4617(S) 51k
5 4
33k 33k
V-
T:2.7V T:1.3V C516 6 3
C509 R515 C511 C512 R520 C514 R523 10p 7 2
6.8k
3300p 33k 0.047u 3300p 33k 0.047u 8 1
V+
DC SW
W:0V Q500
N:5V R525 C518
2SK1824-A
1.5k 0.022u(J)
T:2.6V
R:2.6V
WNTC
MUTE MUTE
AFCO AFCO
RX RX
SB SB
TO AF AMP TO AF AMP
TX FINAL
T:0.6V Q105
TX DRIVE 2SK2595-E
R:0V
T:0.7V Q102
R:0V 2SK2596-E R118 C116 L107
C108 R112 C109 L103 0 1000p 33n
12p 18 1000p 27n
T:7.3V
R:0V
T:5.0V
R:0V
5T
R125
APC APC
3.3k
Q107
DTC114TE
TEMPERATURE
PROTECTION SW
DC SW
T:7.4V
Q104
B UFMMT717 B
T:5.0V R122
Q103 680
2SK1824-A
R126
DC SW
680
PABC
5R 5R
CF200
R:4.8V
L72-0958-05
R:4.4V OUT IN R:3.6V R223
100
TP2
2nd LOCAL
38.4MHz
1st IF 38.85MHz
IF AMP
R:3.6V
Q201 XF200
R:0.7V R:4.4V
2SC4649(N,P) L71-0522-05 MIXER
L201
R210 C214 OUT IN C221 R211
Q202
3SK318
470 0.01u 0.01u 470 820n
D G2
R217 C264
S G1
0 1000p
R:0.2V
R220
R:0.9V 560
C210 C212
0.01u 15p
5R
R207
DC SW
100k Q200
DTA114EE
T:4.9V
R:5.0
5MS
B B
APC APC
TXD TXD
PTT PTT
DC SW
T:4.9V
R:5.0V
C520 C524 C525 L500
0.022u 0.027u 0.1u
T:2.5V AGC MIC MUTE
DETECT /AGC SW
D500 D501
1SS372F DAN222
R530
R532 Q503
100 2SC4919
820 MIC MUTE
/AGC
AFCO
SB
TO AF AMP
D101,104
ANTENNA SW
D104 C140 C144 C147
HSC277 10p 9p 10p
L110 L111 C131 D101 C137 L114 L115 L117
ANT
3T 4T 1000p HSC277 1000p 5T 6T 5T
R:0V
T:7.3V
T:0.8V
R:0V
R:0.1V
T:1.7V
R123
0
D102,103
ANTENNA SW
5T 5T
R144
DC SW R136 330
Q106
APC 2SK1824-A APC 150k(D)
APC
VOLTAGE C134
LIMITER IC100
100p
NJM2904V-ZB DC SW
1 8 Q109
V+
DTA144EE
R133 2 7
150k(D) 3 6 R142
4 5 1M
B R134 R137 R138 GND
R145
150k(D) 150k(D) 150k(D)
180k
5T
5R T:5.0V
Q108
DTC114EE
DC SW
APC APC
R222 C243 L204 R213 R232
0 2p 0.75u 0 47
Q203
3SK318 L211 C262 C254 C257
MIXER
33n 1000p 1.5p 1.5p
RF AMP
R240 C261
BPF TUNING
0 15p
BPF TUNING
D203-205
BPF TUNING
R233
100k
R:150MHz 1.0V
175MHz 2.8V
R341
100k
5MS 5MS
7.5V
F500
B B L501
APC
TXD TXD 3.0A
PTT PTT REVERSE
PROTECTION
C327
IC302 T:4.8V
AUDIO MUTE SW
0.1u TA7368FG R:3.4V R:3.4V
Q307 R536
DC SW
1 10 2SK1588-AZ C337
Q305 NC1 PoUT 1k
2SA1362-F(GR) 2 9 100u6.3
R537 R539
VCC PW-GND
3 8 100 0 PTT J500
NC2
PRE-GND MIC
R327 4 7 C330
VIN PHASE
R538 5MS
0 5 6 100p
RIPPLE NF AFG
100
R332 C332 TXD
150 10u6.3 NC
AUDIO POWER AMP
C334 SP
220p R333
C331 470k
R:7.5V R:7.1V
DC SW DC SW
0.47u C333
Q304 Q306
DTC144EE DTC144EE
0.47u
MIC500
C532
470p
AFCO
SB
TO AF AMP