Kenwood TK-8180 Service Manual page 66

K
TK-8180
DSTB
DT
MM2
AM1
FLASH MEMORY
IC405
AT29C040A-90TI
1 32
A11 oE
A11 RD
2 31
A9 A9 A10 A10
30
3
A8 A8 CE CSO
4 29
Io7
5M A13 A13 D7
5 28
A14 Io6
A14 D6
6 27
A17 A17 Io5 D5
26
7
Io4
WR WE D4
8 25
4.99V
Io3
VCC D3
9 24
A18 GND
A18
10 23
A16 A16 Io2 D2
22
11
Io1
A15 A15 D1
12 21
A12 Io0
A12 D0
13 20
A7 A7 A0 A0
14 19
A6 A6 A1 A1
18
15
A2
A5 A5 A2
16 17
A4 A3
A4 A3
D
5C
DI
DEO
MP
MOD
MB
R522
TV
100k
10CL
HSDIN
HSDO
EMTON
LSDIN
LSW
MM1
BEEP
LSDO
STSW
RXC
CK
SCSW
MIC
ME
OPT6
62
X57-699 3/9
L
SCHEMATIC DIAGRAM
C441
10u
D405
EMZ6.8N
R503 R508
VOLTAGE
100k
PROTECTION 1k
C445
15p
DET AMP/
DATA LPF (DB-25)
IC407
TC75W51FU
C467
C455
R496 C444
100k 39p
R498
270k
VOLTAGE
PROTECTION
2.49V
R500
0
R526 270k
1.53V
LSD BUFFER AMP/
0.01u
C462
VCXO BIAS AMP
IC411
TC75W51FU
LMC7101BIM5
1
0.87V
1
5
OUTPUT
V-
2
2
V+
3
3
4
INPUT+ INPUT-
4
VSS
RF BPF TUNING
VOLTAGE DC AMP
4.7k
R494
HSD BPF/HSD
R495 4.7k
COMPALATOR
C440
0.1u
IC406
TC75W51FU
1 8
VDD
2
7
– +
C443
3 R497
6
+ –
3.3k
4 0.01u
5
VSS
C438 0.01u
M
D/A CONVERTER
IC410
M62364FP
12 R549
13
VIN5 VIN4
47k
14 11
VOUT5 VOUT4
15 10
VOUT3
VOUT6
9
16
VIN6 VIN3
8
17
DO DI
18 7
VDAref CLK
19 6
LD
RESET
5
0.01u 20
GND VDD
4 R546
47u6.3 21
VIN7 VIN2
0
22 3
VOUT7 VOUT2
23 2
VOUT8 VOUT1
1
24
VIN8 VIN1
0.01u
C454
R534
27k
R517
22k
IC408
8
VDD
7
- +
6
+ -
5
R520
2.50V
0
C453
2.50V
0.1u
IC409
TC75W51FU
1 8
VDD
2
7
– +
3 6
+ –
4 5
VSS
LSD LPF/VOLTAGE
DC-REFERENCE
R565 C470
R527 R536
3.9k
0 15k
0.01u
2.50V
EMTON
LSW
LSDO
N O
TX-RX UNIT (X57-6990-10) (B/3)
C465
22p
R529 R535
680k 390k
4.98V
IC412
TC75W51FU
MODULATION
LPF/DEF AMP
C469
0.1u
R521 R523
47k 560k
2.50V
C584
22p
C400
R530
1u 330k
R532
1k
2.48V
AQUA
4.98V
CONTROL
SW
Q405
DTA114EE
R548
82k
R557
4.7k
AF SW
(LSD)
Q406
HN1J02FU
4.92V
MM1
BEEP
DT
MM2
AM1
AF
2.49V
2.50V
V_REF
MM1
BEEP
AGND
LIMLV
LSDIN
STSW
RXC
CK
SCSW
MIC
ME
OPT6