Kenwood TK-7100 Service Manual page 48

P
DISPLAY UNIT (X54-3430-20)
J1 SURGE ABSORPTION
R34
8 CM
7 HOOK
100
6 MIC
5 ME
4 PTT
3 GND
2 SB
1 MBL
CN1
GND
1
2 PTT
POWER
SWITCH
3 MIC
4 POWER
5 ME
6 HOOK
KMI2
7 R8 1k
8 CM
9 KMI1 R9 1k
10 KMI3 R7 1k
11 KMO1
R5 1k
KMI4
12 R6 1k
KMO2 1k
13 R4
14 SB
15 5C
16 CE
17 CL
DI
18
CH
DN
KMO1
KMO2
Note : The components marked with a dot (
Q
SCHEMATIC DIAGRAM
CP1
R90-0724-05
CH VOL VOL
UP DN UP
SCN MON
DC SWITCH
L1
R21 R23
R22
10k 10k 10k
KEY BACKLIT
D4 D2
B30-2205-05 B30-2205-05
D5 D3
B30-2205-05 B30-2205-05
D2-4
KEY & LCD BACKLIT
KRC102S
4.9V
•
) are parts of layer 1.
R
37
COM2
38
COM3
39
VDD
4.9V
40
VLCD
41
VLCD1
LCD CONTROLLER
42
VLCD2
IC2
43
LC75834W
VSS
44
OSC
45
INH
46
CE
47
CL
48
DI
4.9V
R40
47k
Q11
DIMMER FUNCTION SWITCH
4.7V
12.7V
RN47A4
R36 56
13.5V
12.7V
Q10
Q9
2SB1132(Q,R)
KEY BACKLIT SWITCH
R33 56
13.5V
R10
C23 1000p
2.7k
Q10
KRA225S
R11
0.125V
2.7k
D18
HSB123
DC CONTROLLER
Q6
DC SWITCH
S
TK-7100
24
SEG20
23
SEG19
22
SEG18
21
SEG17
20
SEG16
19
SEG15
18
SEG14
17
SEG13
16
SEG12
15
SEG11
14
SEG10
13
SEG9
Q11
LCD ILLUMINATION
D19 D20 D21
B30-2205-05 B30-2205-05 B30-2205-05 B30-2205-05
8.9V
D23 D24 D25
B30-2205-05 B30-2205-05 B30-2205-05 B30-2205-05
D31 D30 D29
12.0V
B30-2205-05 B30-2205-05 B30-2205-05 B30-2205-05
D19-26,28-31
Q9
LCD BACKLIT SWITCH KEY & LCD BACKLIT
X54-343 1/1
T
1
2
3
4
D22
D26
D28
5
6
7
45