Kenwood TK-2180 Service Manual page 55

F
DISPLAY UNIT (X54-3470-XX)
S
S505
S506
1
S507
4
S508
7
S509
*
S510
5M
LCDRST
LCDRS
CLK
DATA
LCDCS
1k
R501
1k
R500
SW1
PTT
Q502
2SB1132(Q,R)
R517
SW2
0
Q501
2SC4617(S)
R518
330
C508
470p
Q501,502
CONTRAST
BACK LIGHT CONTROL
CONTROL
Note : The components marked with a dot (
G
SCHEMATIC DIAGRAM
A B C
S511
S516
KEY CONTROL
2 3
S512
S517
5 6
S513 S518
8 9
S514
S519
0
#
S515
S520
D501,502,511-520
D501,502,511-516
KEY BACK LIGHT
B30-2215-05
LED ON:5.0V
OFF:2.7V
D500
• ) are parts of layer 1.
H
CP501
1k*2
R563 1k
R564
1k
CP503
1k*2
CP504
1k*2
R565 1k
R566 1k
CP506 KEY
1k*2 PROCESSOR
CP507
1k*2
10 Q4
R567 1k
R568 1k
517-520
B30-2210-05
L555
L92-0163-05
I
TK-2180
C522
1000p
IC500
BU2099FV
1 VSS
20
VDD
2 NC
19
OE
3 DATA
18
SO
4 CLK
17
Q11
5 LCK
16
Q10
6 Q0
15
Q9
CN511
7 Q1
14
Q8
Q504
8 Q2
13
Q7
2SK1830
9 Q3
12
Q6
11 LCD RESET
Q5
CP509
1k*2
CN510
MIC500
T91-0579-05
INT MIC
(MAIN)
E40-6413-05
LCDRS
ME
MIC
PTT
SPSTB
CLK
DATA
KI1
KI2
SB2
DGND
LCDCS
LCDRST
5M
J
1
2
3
4
CN509
1
2
5
3
4
AGND 5
6
7
8
9
10
11
12
13
14
15
16
6
17
18
19
20
7
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