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Q Q
3 7 6 3 1 5 1 5 0
3-3. BLOCK DIAGRAM — DISPLAY SECTION —
KEY MATRIX
LSW901–903,909,910,920
S904,906–908,911–919
D503
KEY ACKNOWLEDGE
SWITCH
Q664
RE901
PUSH DIAL SELECT
(VOLUME)
ROTARY
ENCODER
BU+3.3V
10K
S502
(
)
FREQUENCY
SELECTOR
9K
T E
L
1 3 9 4 2 2 9 6 5 1 3
D510
CD
C
SYS RST
SECTION
(Page 13)
RESET
IC602
BU+3.3V
2
VDD VOUT
1
X502
32.678kHz
w w w
CDX-GT250M
SYSTEM CONTROL
LCD DRIVER
IC501 (3/3)
IC901
5
41
KEYIN0
|
S1
50
LCD SO
28
|
64
DI
•
40
KEYIN1
55
LCD CKO
CL
CLK
S48
29
63
•
60
LCD CE
27
62
CE
CE
COM4
51
|
|
COM1
54
52
KEY ACK
76
XKEY ON
31 RE-IN0
32 RE-IN1
DIMMER
2
BACK LIGHT
1
3 AREASEL0
7 NOSE DET
88 SYS RST
REMOTE CONTROL
SIGNAL REVEIVER
77
RESET
IC971
S702
RESET
SIRCS
2 OUT
IR
64
79
XOUT
OSC IN
82
80
XIN
X501
18.432MHz
OSC OUT
83
x
a o
y
.
i
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LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
PANEL+B
LED932
(
)
LCD BACK
LIGHT
LED904,906–908,
911–919,941–944,951
LSW901–903,909,910,920
DIMMER
LED DRIVE
Q931
LCD BACK LIGHT
LED DRIVE
Q932
Q
Q
3
7
6
u 1 6 3
.
15
15
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2
4
8
9
9
3
1
5
1
5
0
8
9
2
m
c o
CDX-GT250M
2
8
9
9
4
9
8
2
9
9
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