Kenwood TK-880 Service Manual page 23

TX-RX UNIT (X57-6450-XX) (A/2)
C320 C322
R305 10k IC300 2.2u10 2.2u10
PLL IC
SA7025DK or CD8468
R319
L302
R301 1k 1 CLOCK
VDD 1k
R302 1k 2 DATA 20 R316 R318
TEST
0 220
R303 1k 3 STROBE 19
LOCK
4 VSS 18
RF Q301
5 RFIN 17 2SC3722K(S)
C306 RN
Q302
1000p 6 RFIN 16 R307 ACTIVE 2SC3722K(S)
VDDA FILTER
0 ACTIVE
7 VCCP 15
PHP FILTER
R304 8 REFIN 14
0
PHI
9 RA 13
VSSA
10 AUXIN 12
R306
PHA
11 470
L303
5.10V C330 C331 C312
L1
10u
Q2 2p 2p 4p 22n
RIPPLE FILTER
2SC2412K(S)
L305 L306
12n 12n
7.87V
16.8MHz
Q300
2SC4215-F(Y)
8.06V BUFFER AMP
RIPPLE FILTER 8.77V
7.15V
X1 IC1 R26 R27 Q3
L77-1946-05 2SC2412K(S)
TA75W01FUF
100k 47k
1.56V
5.13V
5 4
5V AVR
6 9.42V
3
5.10V IC9
TA78L05FF 7 2
R70
0 3 8 1
1 OUT IN
9.59V
COM 3.73V
2
CN7 DC AMP 8.06V
5C
W/N 1
T/R 2
MO 3
TO 4
BEEP 5
8R 6
PSW 7
8
DEO
MM 9
AFO 10
ME 11
MI 12
AHK 13
OVER CURRENT PROTECTION
IGN 14
SB 15
SB 16
D24 MINISMDC07502F
8C 17
KEY 18
CK 19
DT 20
RSSI 21
LD 22
ES 23
EP 24
EN 25
APTT 26
CP 27
DTC 28
TXD 29
RXD 30
OE 31
FSW 32
E 33
CHARGE
RSSI
D35
3.10V
MA742
R15
10k
4
5
R25
6 3
CN1
390k 7 2
1 R157 100
DEO R1 1k
AHK/BUSY 2
3 R2 0 8 1
IGN
4
DI 5.13V
5
ME/AM R94 0
MI/TXS 6 IC2
7 R3 100
PTT TA75W558FU
8 R4 1k
SQ
DET AMP
$R5 SQ
CN2 DEO RXD2 SQ2
1 R6 0
LOK/AM
R7 0
MM $R84
R8 1k
LOK/DTC/TXS/FSW
3
D1-6,17
CN3 DA204U or HSB123
1
HOR
E PROTECTION
TXD2
SB
3
CN4
1 R9 0
LOK D1 D4 D2 D3 D5 D6 D17
R10 1k
RXD1
R11 1k
TXD1
3
TXD1
SB GND RXD1
LOK
A1 X58-4550-10 (VCO)
R117 100
RX OSCILLATOR C115 L107 R104
Q101 RX VCO
4p 1n 100
C125 2SK508NV(K52)
L101
R111 C122 L105 C104 D103 R101
4p
47 0.5p 8p 1SV283F 1.5n 100
TC106
C107 RX VCO
5p
Q106 10p
2SC4226-A(R24)
R113
BUFFER AMP INVERTOR
R109
180
Q102
10k
DTC114EUA
Q105
2SC4081 R118
TX / RX SW 0
R103 68k
R105
R107
105k MODULATION
Q104 10k
2SC4081
TX / RX SW C116 C113 C112
Q103
TX VCO
2SK508NV(K52) 5p 1.5p 1p
TX OSCILLATOR L106 C105 D104 L102 R102
6p TC109 1SV283F 1.5n 0
C110 10p
TX VCO
4p
9CL 9CL
CV CV
HT HT
8CL 8CL
8C 8C
9C 9C
W/N W/N
T/R T/R
MO MO
TO TO
BEEP BEEP
8R 8R
PSW PSW
AFO AFO
9.59V
IGN IGN
SB SB
8C 8C 8.06V
KEY KEY
CK CK
DT DT
RSSI RSSI
ES ES
EN EN
DEO DEO
OE OE
R39 IC4
100 ANALOG SW TC4S66F
1 VDD 5
4.41V 2 N:0.12V
DC SW
4 W:4.96V
3
Q1
VSS
2SK1824-A
R14
47k
5 4
R33
C29
5.6k
6 3 10u10
C36
7 2 R44 $R43
150k 10u10
8 1
R406 $R407
R408
0 A/D CONVERTER
390k $R38
IC3
TA75W558FU
8.06V C31 R37 M62363FPDFOJ
AMP
DI DI
SUMMING AMP 10u10 0 1
5C 5C
2
PTT PTT
3
4
HOR SW CONTROL
HOR HOR R58 5
Q6
1k
DTC114EE 6
C429
7
10u10
FSW R50 8
9
10k
10
Q5 11
C175 DTC114EE 12
HOR SW
1000p Q402 Q403 HOR SW CONTROL 5.13V
Q4
DTC114EE DTC114EE
DTD114EK
5C 5C
SQ SQ
ME ME
LOK LOK
AHK AHK
IGN IGN
FC FC
13.28V
PSW ON:0V
RF AMP
Q202
2SC4093(R27)
D40,41
RF SWITCH
D40 R403 C234 R425
TP1 BUFFER AMP
HVC131 0 5p 0
R231
Q7
2SC5110-F(O) C62 D41
10k
C55
R:0V
CN101 2p HVC131
2p T:4.37V
1
ST R223
HT
1k
E
9CL
8CL
MD
CV
R:8.02V
8R SW 8T SW
T:0V
7 Q11 Q12
2SA1362-F(Y) 2SB1132(Q,R)
6.75V
R:8.06V
R:7.28V T:7.29V
T:8.06V
8.77V
8.06V
DTC114EE
R:4.95
Q10
T:0.01V DTC114EE 8T SW CONTROL
8C 8C
8R SW CONTROL
KEY KEY
T/R T/R
RSSI RSSI
PC PC
8R 8R
R59 0
R215
R:7.79V
10
T:0V
L203
L207
L79-1585-05 L79-1585-05
R:1.73V
* C201 C204 C207 T:0V C275 R225 * L209
1000p 10p 4p 0
L205
C214 Q201 * R227
2SC3357-A
7p 10n RF AMP
* R202
TP2
R:0.97V
* L200 T:0.11V
C218
470p
TV D200
HSM88AS
OVER VOLTAGE
PROTECTION
D203,204 LOW:1.55V D205,206
VARI-CAP CENTER:3.98V
VARI-CAP
TUNE HIGH:8.01V
TUNE
DEO DEO
W/N W/N
STR STR
9C 9C
SB SB
IGN IGN
OE OE
ES ES
DT DT
CK CK
5C 5C
R41 R42 R45
PROTECTION H/L SW
R:0.05V PROTECTION
1.2k 100k 100k T:4.36V D8 Q29
DA204U or HSB123 DTC114EE
IC5 R:2.53V
T:4.99V
24 D9
VIN1 VIN8 DC AMP
23 DA204U or
VOUT1 VOUT8 IC7
BU4094BCFV HSB123
22 IC6
VOUT2 VOUT7
21 TA75W01FUF 1 16
VIN2 VIN7
STRB VDD
20 CODE3 2 15
VDD GND 1 8 DATA OE
19 5.11V 3 14
LD RESET 2 7 CLK Q5
18 2.36V 4 13
CLK VDAref HIGH POWER:4.96V Q1 Q6
17 3 6 LOW POWER:0V 5 12
DI DO Q2 Q7
16 6 11
VIN3 VIN6 4 5
Q3 Q8
15 7 10
VOUT3 VOUT6 IC7 Q4 Q'S
14 8 9
VOUT4 VOUT5 SHIFT VSS QS
13 REGISTER CODE4
VIN4 VIN5
HNC HNC
SQ SQ
ME ME
LOK LOK
AHK AHK
IGN IGN
PSW PSW
BPO BPO
X57-6450-XX(A/2) R202 C201 C421 L200 L208
-10 K 4.7 NO NO NO NO
-13 HK NO 12p 1000p 18n 22n
RF AMP
RF AMP
Q205
Q204
2SC3357-A
2SC3357-A
C251
C245
7p
5p
R:0V
T:7.06V
R:0V
T:1.18V
R:0V
T:1.41V
D401
R:0.01V
TEMPERATURE
T:7.95V R:0V R:0V
D207 PROTECTION * D401
T:4.49V T:1.94V R457
DA204U
* R120
TEMPERATURE 150k * R139
R112
COMPEMSATING
4.7k
R458 R459 * C432
4 OUT
Q17 IN(-) 3 10k 15k
2SC2412K(S)
VEE 2
PC SW 5 VCC
R:4.86V IN(+) 1
T:0V
R:0V R251
IC402
T:4.89V 470k R:0.63V
TA75S01F-F R:0V(K,HK)
T:4.35V
APC DC AMP T:3.90V(K),2.51V(HK)
DET MUTE
Q18
2SK1824-A
Q13 8T
8C
8.06V
RSSI
R110
8R
L211 R124 5.08V 47
22k
L39-1272-15
R:2.25V
T:0V
L6
L34-4787-05 R230
6.8k
MIXER TP4 XF1
Q203
2SC3357-A L71-0572-05
L210 IC200 L212 R250 C243 R89 R96 44.850M
L39-1272-15 GN2011(Q) L39-1272-15 C233 L213 R224 C239
0 0.01u 0 330
3 4
S2 D2 0.01u 150n 0 0.01u R:0.64V
C231
2 5 R:1.41V T:0.03V
S1 D1 T:0V
1 6
0.1u
G2 G1 L2 R68
100
D203
4.72V 5.13V
PRE IF AMP
DM
DEO
W/N
5C
9C
SB
IGN
ST D12-14 13.54V
5.13V
PROTECTION C63 R76
AF
15k IC10
0.01u POWER AMP LA4422-E
R:5.07V
T:0V
SHIFT
REGISTER
7.48V
IC8 D12 D13 D14
BU4094BCFV
DA204U or DA204U or DA204U or
1 16
HSB123 HSB123 HSB123
STRB VDD
2 15
DATA OE
3 14
CLK Q5
4 13
Q1 Q6
5 12
Q2 Q7
6 11
Q3 Q8 D16
7 10
Q4 Q'S REVERSE
8 9 AF CURRENT
VSS QS
MUTE PROTECTION
ST 13.13V
Q8 Q9
DTC363EU DTA114YUA
R60
AF
4.7k MUTE
CODE2 CODE1 OPT 13.2V
D11
AF MUTE GATE DAN202U
IGN
TOF
PSW
PA
X57-6450-XX(A/2) D401 VR1 L4 L209 R120 R139 R227 C69 C173 C224 C281 C432
-10 K NO 100k 82n NO 4.7k 0 0 150p 1u16 NO 4p NO
-13 HK MA2S077 20k 8.2n 6.8n 6.8k NO NO 6p 3.3u6.3 7p 3p 0.01u
* IC400
POWER MODULE
1 2 3 4
R204
L222 L224
100
* D402 1.5T 1.5T
L219
C254 R205 R402
10n 22p 120 0
D209
MA4PH633 C267
R:0V
1000p
T:4.80V R420
D209-211,402 POWER DET 0
ANT SW D27 POWER DET
HSM88AS
R:0V R:0V
D30
T:17.24V T:14.51V
HSM88AS
R:13.6V(K,HK)
R:0V(K,HK) APC
T:12.95V(K),12.1V(HK)
T:3.75V(K),3.83V(HK)
Q404
2SC4116(Y)F IC401,Q401
R452 R453
* R:0V SHORT
T:14.37V PROTECTION
1k
Q401
DTC114EE
0.01V
R:0V R418 47k
T:1.52V
R:0V
T:2.32V 1 8
R415 AOUT V+
10k 2 7
D407
A-IN BOUT
PROTECTION 1.01V 3 6
A+IN B-IN
4 5
GND B+IN
R:0V(K,HK)
D408 R:0V
T:3.20V(K),4.94V(HK) IC401
REVERSE CURRENT T:2.31V NJM2904V
PROTECTION
R:0.01V
8T T:7.95V
8C
5.08V
5.08V C102 27p
CF1
RSSI W/N SW
L72-0372-05 or
0.59V L72-0998-05 Q23
R111
8R DTA114EE
R:7.95V 4.7k
FM IF
T:0V
DET,IC
W/N SW W/N SW
R107 C153 C154 IC11
TA31136FNG D22 CF2 D23
47k 0.01u 0.01u
R:0.72V DAN235E DAN235E
L72-0376-05 or
T:0V C108
0.1u L72-0986-05
Q15
Q24
2SC2059K(P) TP3
DTC144EE
IF AMP W/N SW
C96
R100 R104 C92
18p
5V AVR
330 0 0.01u DET MUTE IC12 IC14
8.06V 8V AVR
R114 Q32 TA78L05FF TA7808S
5.13V
3.9k C100 2SK1824-A
1 OUT 3 2 1
IN OUT IN
10u10 COM GND
9V AVR
Q16 2 3
DTC144EE IC13
AN8009M
AF SW R138 R142
1 3 10 10
DM OUT IN
DEO
COM 1/2W
W/N
9.59V
2 13.54V
5C
9C
SB
IGN
R:12.82V
C142 470p
T:12.34V 13.57V
REVERSE CURRENT PROTECTION 5.06V 13.57V
R152 R151 SB SW
4.6V D20 R128 0 0
Q27
2SA1641(S,T)
1SS355 22k
D21
D26,31
02DZ5.6F(X,Y)
REVERSE
PROTECTION 13.32V CURRENT REVERSE VOLTAGE PROTECTION
PROTECTION D26 R143 13.02V 12.82V
1SS355 1k R150 0
TOF SW
POWER ON:0V R106
Q25
POWER OFF:13.37V
DTA114EE
0
Q28
R144 1 14 DTC114EE
Q1 VDD
22k
2 13
TOF SW Q1 Q2
3 12 R109
CLK1 Q2
Q22
4 11 0
DTC114EE R1 CLK2
5 10 Q30
INVERTOR D1 R2 DTA114EE
6 9
S1 D2
R153
Q26 7 8
VSS S2 0
DTA114EE 0V
Q28,30,31
IC15
Q31 SB SW CONTROL
TC4013BF(N)
13.20V DTC114EE
FLIP FLOP
IGN
TOF
R134 47k
PSW
13.33V
PA
X57-6450-XX(A/2) IC400 D402 R135 R147 R451 R452 C257 C265 C269 C272
-10 K RA30H4552M123 NO 150 1/2W 8.2k NO 0 22u 2p 8p 8p
-13 HK RA45H4552M131 MA4PH633 120 1/2W 22k 5.6k 1.2k NO NO 6p 6p
ANT
R421
0
DC 13.6V
CN5
PA
1
SPO
SPI
3
J1
EXT.SP
CN6
SP
E
C273 C418
3p NO
1p 1p