Kenwood NX-820G Quick Start Manual page 77

AY
DISPLAY UNIT (X54-3830-10)
D 1 1-21,24
LCD BACKLIGHT
D11 D15 D19
D12 D16 D20
D13 D17 D 2 1
D14 D18 D24
B30-2337-05
INT SP
SP+
SP-
HOOK:4.96V
PTT:4.62V
SB:13.53V
J 1
MBL:5.00V
4.82V
DM
HOOK
MIC
4.62V
ME
MIC
PTT
GND
SB
MBL
5.0V
CN1
1 SB
2
3 SP-
4
5 SP+
6
7 BLC
8 MBL
9
RLED
1 0 GLED
11 BLED
1 2 GND
13 GND
GND
1 4
15 EMG
1 6 GND
17 NC
1 8 50C
19 LCDDI
20 LCDCE
21 LCDCL
22 LCDDO
GND
23
24 GND
25 MIC
26 ME
27 HOOK
28 PTT
29 MKEY
LED OFF:0V
POWER LED ON:5.0V
30
POWER
LTC014EEBFS8
3.27V
TX LED
SWITCH
CONTROL
AZ
SCHEMATIC DIAGRAM
R 3 4
270
2.07V
R35
270
R 3 6 R29
220
2 7 0
R37 R28
120
270
Q 8
KT C4 0 7 5 E( Y, GR )
LCD BACKLIGHT
SWITCH
KEY BACKLIGHT
SWITCH
QST7
12.93V
KTC4075E(Y,GR)
R42 Q11
2.7k
D 1
SURGE
PROTECTION
R1 2
1 0 0
13.5V
D2
DA3 S1 0 1 F
SB
R7
0
R5
1k
L 1
50C
C P 1
1 0 0 X4
B30-2321-05
R:0V
R:4.95V
D2 2 T:4.95V
T:0V
LED OFF:0V
R:5.0V R:2.13V
LED ON:2.26V
T:1.81V T:5.0V
R3 8
R3 9
4.7k
4 . 7 k
Q3 Q6
KT C 4 0 7 5 E( Y, GR) KT C4 0 7 5 E( Y, G R)
R:0V
R:2.06V
T:1.76V T:0V
Q 1 0
D2 3
B30-2151-05
TX/BUSY
D2 2
INDICATION
INDICATION
(BLUE)
BA
NX-820(G)/820
LCD
9.72V
5.0V
Q 9
KEY BACKLIGHT
SWITCH CONTROL
D 2
VOLTAGE
PROTECTION
5.0V
D 2 6
KMO1
R1 7
KMO2
0 KMO3
HN 2 S 0 3 F E
KMI1
49
K I 1
50
KMI2
K I 2
KMI3
51
K I 3
52
K I 4
5.0V
53
K I 5
54
V D D
55
V L CD
56
VLCD1
57
R2 VLCD2
R 3 R4
58
1 0 k
10k
1 0 k V SS
59
T E ST
60
o S C
61
D o
62
C E
63
C L
64
D I
Q3
TX LED
SWITCH
Q6
BUSY LED
SWITCH
BB
D5-9
KEY BACKLIGHT
3.77V
D5 D8
R 2 4
3.3k
B 3 0 - 2 3 3 7 - 0 5 B 3 0 - 2 3 3 7 - 0 5
3.77V
D6 D9
R25
B 3 0 - 2 3 3 7 - 0 5 3.3k
B 3 0 - 2 3 3 7 - 0 5
1.89V
D7
R26
4.7k
B 3 0 - 2 3 3 7 - 0 5
B C
KMO1
A
S
KMO2
KMO3
LCD DRIVER
I C 1
L C 7 5 8 5 7 W - E
BC
1
2
3
4
5
32
S 3 2
31
S 3 1
30
S 3 0
29
S 2 9
28
S 2 8
27
S 2 7
26
S 2 6
25
S 2 5
24
S 2 4
23
S 2 3
22 6
S 2 2
21
S 2 1
20
S 2 0
19
S 1 9
18
S 1 8
17
S 1 7
7
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