Display Unit(X54-3560-20) - Kenwood TK-90 Service Manual

A
TK-90
SCHEMATIC DIAGRAM /

DISPLAY UNIT(X54-3560-20)

1
ED1
B38-0914-05
2
3
CN1
E41-2077-05
2 SP
SP 1 SPG
4
E37-1231-X5
CN2
E41-2559-05
SPG 11
SP 10
SB 9
13.56V
TXD0 8
5.01V
PS 7
4.85V
RXD0 6
5.02V
PSENSE 5
1.81V
8D 4
5
E 3
MIC 2
ME 1
E37-1227-X5
6
J1
E58-0522-05
1 DM
5 RXD1
2 MIC
ME
6
3 PTT/TXD1
7 GND
4 SB
8 BLC
LIMITER
7
108
X54-356 1/2
B
S11
S70-0896-05
3
4
2 5
R15 1 6
390
S3
S70-0896-05
3 4
2 5
R17
1 6
390
S6
S70-0896-05
3 4
2
5
R19 1 6
SW 0.11V
390
Q2
DTC114EE
3.95V
7.93V XC6201P502PR
R1 0 3
VIN
R2 0
R3 10u
0 L3
R4 0 100
R13
R5 0
R6 0
R12 100
R7 100
R8
0
7.93V
R9 0
R10 0
R11 0
1.8V
ZENER
1
DIODE
2
3
4
C18
C16
0.01V
100p
100p
4.55V
C17
DTC144EE
100p
R21 1k
R22 100
R23 0
R24 1k
1.8V
CN23
ZENER
DIODE
LIMITER
C
KEY
S8
S70-0896-05
3 4
CH-UP
2 5
CHUP
R29 1 6
820
S10
S70-0896-05
3 4
VR-UP
POWER
2 5
VRUP
1
6
S2
S70-0896-05
3
4
B A
2 5
KEY3 KEY2
1 6
S5
S70-0896-05
3 4
D>
2 5
KEY6 KEY5
1 6
AVR
IC1
5.02V
1
VOUT
VSS
2
C24 R33
0.01u 100
AND GATE
IC2
TC7WT125FUF
8 5.02V
G1 VCC
7
A1
G2
6
Y2
Y1
5
GND
A2
5.00V
Q6 Q7
DTC144EE
0.10V
SW SW
3.95V
Q11
DTC114EE
D6
DA221
D3,4,6
D
S7
S70-0896-05
3 4
CH-DW
2 5
CHDN
1 6
S9
S70-0896-05
3 4
VR-DW
2 5
VRDN
1 6
S1
S70-0896-05
3 4
2 5
KEY1
1 6
7mA
S4
S70-0896-05
3
4
<C
2 5
KEY4
1 6
SW
7.93V 7.91V
Q5
12A02CH
7.20V
S-80942CNNBG9C
3 CD
5.00V 4
6.91V
RESET IC
SW
Q4
DTC114EE
D8-19
LCD BACKLIGHT
20mA 20mA 20mA
0.10V 0.10V 0.10V
4.24V 3.94V 4.24V
SW SW SW
Q12 Q13
Q14
DTC114EE DTC114EE DTC114EE
E
SW_8C
5C
IC5
2
5.02V
VDD
VSS
1
oUT
DGND1
5.02V
RST
20mA
SW
BLC1
DIMM
BLC2
RX
TX
PTT/TXD
DM
RXD0