Block Diagram - Display/Key Control Section - Sony MDX-C7900 Service Manual

MDX-C7900/C7900R
5-3. BLOCK DIAGRAM – DISPLAY/KEY CONTROL Section –
(LSW813: AEP, UK model only)
D900 LSW801 – 804,
LSW806 – 821
J900
(REMOTE IN)
49 72 46 47
93 92 73 74
X700 X701
3.68MHz 32kHz
EN801
VOLUME/BASS/TREBLE/
BALANCE/FADER CONTROL
LSW805
D-BASS
ROTARY
ENCODER
EN801
D912
KEY ACTIVE
SWITCH
Q905
106 107 50 79 37
100 13 14 104
S701
(FREQUENCY SELECT)
MW 10K/FM 200K
MW 9K/FM 50K
(C7900: E model)
R845
OSC
21 20 18 17 19 22 – 25
KEY IN1 – KEY IN4
SEG1 – SEG65 COM0 – COM7
26 – 90 100 – 93
05
LCD801
LIQUID CRYSTAL DISPLAY
– 25 –
CNP801
12
FRONT PANEL SIDE
CN900
BACKUP +5V 12
MAIN BODY SIDE
12
MASTER CONTROLLER
IC700 (2/3)
(LSW813: AEP, UK model only)
D811 – 817,
LSW802, 807, 812
LED DRIVE LED DRIVE
Q804
Q802
LIQUID CRYSTAL DISPLAY DRIVER
IC801
2
BUZZER
BZ1
DRIVE
(BUZZER)
Q701
15
LCD +10V
B+ SWITCH
LCD +10V
Q806
LSW801, 804, 806,
LSW808, 809 – 811,
LSW813 – 821
Q803
CONTRAST
SWITCHING BATT
Q901, 902
Q801
1 4 11 – 6
VLC0 – VLC5
3
DIMMER
– 26 –
40
D (Page 10)