Block Diagram - Display/Key Control Section - Sony MDX-C8970 Service Manual

MDX-C8970
4-4. BLOCK DIAGRAM – DISPLAY/KEY CONTROL Section –
CNJ272
REMOTE IN
DSPCK, SA DATA
(Page 21)
F
LOCK
(Page 19) C
70
R924
OSC
13 12 9 8
LIQUID CRYSTAL
DISPLAY DRIVER
IC920
SEG66 – SEG121
25 – 80
05
LSW702, 900 – 906,
D282
LSW909 – 918,
S900
ROTARY
VOLUME/BASS/
ENCODER
TREBLE/BALANCE/
RE900
FADER CONTROL
D254
49 60 47 48 1 2
78 115
X701
18.432MHz
48 63 61 33 86 85 54
LIQUID CRYSTAL DISPLAY
DRIVE CONTROLLER
IC701 (1/2)
60 64 66 69
BUFFER
IC921
7 10 16 – 19 18 17 14 19
VLC0 – VLC3
COM0 – COM3 SEG1 – SEG65 COM0 – COM7
21 – 24 26 – 90
LIQUID CRYSTAL DISPLAY
LCD900
RE900
KEY ACTIVE
SWITCH BACKUP +5V
Q523
76 107 109
MASTER CONTROLLER
IC500 (3/4)
41
CN702 CN800
MAIN BODY SIDE FRONT PANEL SIDE
9 10
LED900 – 907,
LSW901, 902
CONTRAST
SWITCHING LCD +10V R952
Q254, 255
OSC
11 – 6 21 20
VLC0 – VLC5
LIQUID CRYSTAL DISPLAY DRIVER
100 – 93
22 22
BUZZER
S500 BZ500 LED706
DRIVE
(NOSE DETECT) (BUZZER) (MD DISC SLOT),
Q504
LSW702
§
15
P-ON +10V
P-ON +10V
SWITCH
Q904
LSW900,
LSW903 – 906,
LSW909 – 918
LED DRIVE LED DRIVE
Q900 Q901
Q903 Q902
1 2
IC900
TEL 5V
I (Page 21)
LED DRIVE
BATT B+
Q251
95
93 92 73 74
X500 X501
3.68MHz 32.768kHz
LCD +10V
LED971 – 976
(LCD BACK LIGHT)
LED B+
REGULATOR LCD +10V
Q971, 972
3 4