Kenwood TK-2180 Service Manual page 56

LCD ASSY
(B38-0900-05)
3.51V
SIDE KEY
SECTION
CN507
E40-6410-05
SW1 SW1
5
PTT 4 PTT
GND 3 GND
K1
2
K1
SW2 1 SW2
DISPLAY UNIT
(X54-3470-11)
CN508
E40-6413-05
C524 4.7u16
C565 1u
C564 1000p
C563 1000p
470p
C557
1000p
C556
VOLTAGE
REGULATOR/LCD
C523 4.7u16
IC501
1u
C555
XC6201P352MR
4
R573 470k S D
NC2 NC1
Q505
3.51V
2SJ144(Y)
VSS
G 5
CONTRAST CONTROL
VoUT VIN
R574 R547 R545 R546 R544
0 27k(D)
22k 470k(D) 180k
5 4
2Y
GND
6 3
3A 2A
7 2
1Y 3Y
8 1
VCC 1A
IC502
HD74LV2G34AUS
IC503
HD74LV2G34AUS
5 4
2Y GND
LCD CONTROL
6 3
2A
3A
2
7
1Y 3Y
8 1
VCC 1A
LCD CONTROL
3
2
1
4.98V
5M 5M
R580
LCDRST LCDRST
330
R579
LCDRS LCDRS
330
R578
CLK CLK
330
R577
DATA DATA
330
R576
LCDCS LCDCS
330
SW1 SW1
PTT PTT
SW2 SW2
2SC4617(S)
R518
330
C508
470p
Q501,502
BACK LIGHT
CONTROL
CP501
1k*2
R563 1k
R564
1k
CP503
1k*2
A B C D
S505 S506 S511 S516
CP504
KEY CONTROL
1k*2
R565 1k
R566 1k
CP506
1k*2
1 2 3
S507 S512 S517
4 5 6
S508 S518
S513
7 8 9
CP507
S509 S514 S519
1k*2
0
*
#
S515
S510 S520
R567 1k
R568 1k
1k
R501
1k
R500
D501,502,511-520
D501,502,511-516 D517-520
Q502
R517
KEY BACK LIGHT
2SB1132(Q,R) B30-2215-05 B30-2210-05
0
LED ON:5.0V
Q501
OFF:2.7V
D500
CONTRAST
CONTROL
C522
1000p
KEY
PROCESSOR
IC500
BU2099FV
1
20
VSS VDD
2 19
NC OE
3 18
DATA SO
4 17
CLK Q11
5 16
LCK
Q10
6 15
Q0 Q9
CN511
7 14 Q504
Q1 Q8
8 13
2SK1830
Q2 Q7
9 12
Q3 Q6
LCD RESET
10 11
Q4 Q5
CP509
1k*2
CN510 MIC500
T91-0579-05
INT MIC
(MAIN)
CN509
E40-6413-05
1
2
3
LCDRS 4
5
AGND
ME 6
MIC 7
PTT 8
SPSTB 9
CLK 10
DATA 11
KI1 12
KI2 13
14
SB2 15
16
DGND 17
18
LCDCS
19
LCDRST
L555
5M 20
L92-0163-05