Schematic Diagram - Key Board - Sony XR-CA440H Service Manual

6-7. SCHEMATIC DIAGRAM – KEY Board – •
CN901
12P
GND
GND
FLASH-W
GND(COLOR)
KEY-1
KEY-0
R996 1k
LCD-CE
R998 1k
LCD-DATA
R997 1k
LCD-CLK
(Page 17)
+B
+B
PANEL-SW
D901
UMZ6.8ENTR
LSW900(1/2)
LSW901(1/2) R901
OFF 680
R902
S902
SOURCE
680
VOL
LSW903(1/2)
R903
+ 680
LSW904(1/2) R904
ATT
1k
VOL
LSW905(1/2) R905
-
1.5k
S906 R906
MODE
1.5k
ALBM +
ATA LSW907(1/2) R907
2.2k
6
R908
3.3k
R909
LSW909(1/2)
4.7k
SENS
DISC -
LSW910(1/2) R910
1
6.8k
DISC +
2 LSW911(1/2) R911
10k
ALBM -
BL SKIP LSW912(1/2) R912
15k
5
REP
LSW913(1/2) R913
3
22k
SHUF
LSW914(1/2) R914
4 47k
See page 13 for Waveform.
R931 R941 R951 R932 R942 R952 R933
1.5k 1.5k 1.5k 1k 1.5k 1k 1k
PL901
(LCD BACK LIGHT)
R973 R963
LSW900(2/2) LSW925(2/2)
220 220
DSPL
R919 R929 R939
22 22 22
CE
LSW920(2/2) LSW901(2/2) LSW909(2/2)
OFF SENS
DI +
SEEK AMS
CL
LED940 R972 R962
LSW910(2/2)
CL-190Y 220 220
(ILLUMINATION)
DISC -
1
PL902
(LCD BACK LIGHT)
LSW923(2/2) LSW927(2/2) LSW911(2/2)
- MTL DISC +
SEEK AMS BTM 2
+
SEEK AMS
LSW920(1/2)
R921 LSW921(1/2)
SEL
680
R922
D-BASS
S922
680
-
SEEK AMS
R923 LSW923(1/2)
680
R924 LSW924(1/2)
MBP
1k
R925 LSW925(1/2)
DSPL
1.5k
R926
1.5k
R927
MTL
2.2k LSW927(1/2)
BTM
R943 R953 R934 R944 R954 R935 R945 R955 R936 R946 R956 R937 R947
1.5k 1k 680 680 680 680 680 680 680 680 680 680 680
R967 R977
680 680
LSW913(2/2) LSW903(2/2)
REP VOL
3 +
LED902
CL-190D
LED902,903 LED922,923
SOURCE D-BASS
LSW914(2/2) LSW904(2/2)
ATT
SHUF
4
LED903 LED922
CL-190D CL-190D
LED906
LED950 CL-190Y LED923
LSW912(2/2) CL-190Y CL-190D
(ILLUMINATION)
ALBM -
MODE
BL SKIP
5
LSW907(2/2) LSW905(2/2) LSW921(2/2) LSW924(2/2)
SEL MBP
ALBM + VOL
ATA -
6
19 19
R957 R990 R991 R992
680 2.2k 2.2k 2.2k
SEG47
R987
S47
680
SEG48
S48
SEG49
S49
COM1
COM1
COM2
COM2
COM3
COM3
COM4
R999
COM4
R995
0
1M
VDD
R994 R983 1k
D991 C992
330k VDD1
MM3Z4V7ST1 0.1
R984 1k
C994
C991 C993 VDD2
100p
0.022 0.1 R985 1k
VSS
OSC
C995 0.22
INH
CE
CE
CL
CL
DI
DI
LCD901
LIQUID CRYSTAL DISPLAY
XR-CA440H
SEG31
S31
SEG30
S30
SEG29
S29
SEG28
S28
SEG27
S27
SEG26
S26
SEG25
S25
SEG24
S24
SEG23
LCD DRIVER S23
SEG22
IC901
S22
LC75824W
SEG21
S21
SEG20
S20
SEG19
S19
SEG18
S18
SEG17
S17
SEG16
S16