AIWA CDC-X144 Service Manual - Page 8

Block Diagram-display Circuit Boards Location, Main Board, Key Board, Sensor Board

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CDC-R104/X104/X144 3-4. BLOCK DIAGRAM - DISPLAY SECTION - ROTARY ENCODER S911 (1/2) KEY MATRIX S901-903 KEY MATRIX S904-910 S911 (2/2) KEY MATRIX S912-920 BACK UP+3.3V RESET IC602 2 IN OUT 1 SYSTEM CONTROL IC501 (3/3) 98 RE 97 KEYIN2 27 KEYACK LCD SO 76 LCD CKO 78 LCD CE 77 94 KEYIN1 95 KEYIN0 75 COL SEL 90 COL SW LCD DRIVER IC901 64 DI 63 CLK 62 CE SEG3 3 || SEG50 50 COM1 54 || COM4 51 2 SW1 DDIIMMMMEERR 1 LCD901 LIQUID CRYSTAL DISPLAY PANEL DIMMER CONTROL Q901 LED DRIVE Q904-906 LED921,922 ( ) LCD BACK LIGHT PANEL+10V LED DRIVE Q902,903 LED901-920 S702 RESET 19 RESET X502 32.768kHz 15 XIN 16 XOUT OSCIN 13 OSCOUT 12 X501 27MHz 3-5. CIRCUIT BOARDS LOCATION SENSOR board SERVO board KEY board tuner unit (TU1) MAIN board AUX board 20 20

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20
20
CDC-R104/X104/X144
X502
32.768kHz
15
16
13
12
97
76
78
77
27
19
LCD DRIVER
IC901
KEYIN2
LCD SO
LCD CKO
LCD CE
PANEL+10V
KEYACK
90
COL SW
75
COL SEL
RESET
2
IN
1
OUT
XIN
XOUT
OSCIN
OSCOUT
X501
27MHz
S702
RESET
63
64
62
1
COM1
COM4
LCD901
LIQUID
CRYSTAL
DISPLAY
PANEL
LED921,922
LCD
BACK LIGHT
3
|
50
54
|
51
|
SEG3
SEG50
|
DI
SW1
2
LED901-920
BACK UP+3.3V
(
)
KEY MATRIX
S901-903
95 KEYIN0
KEY MATRIX
S912-920
94 KEYIN1
KEY MATRIX
S904-910
S911 (2/2)
98
SYSTEM CONTROL
IC501 (3/3)
RE
LED DRIVE
Q904-906
LED DRIVE
Q902,903
ROTARY
ENCODER
S911 (1/2)
RESET
IC602
DIMMER
CONTROL
Q901
CL
CE
DIMMER
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
3-5. CIRCUIT BOARDS LOCATION
MAIN board
AUX board
KEY board
SENSOR board
SERVO board
tuner unit
(TU1)