Sharp MD-X7H Service Manual page 6

MD-X7H
MAIN PWB-A(2/3)
A
CNP975
D7
12
D6
B 11
D5
10
D4
9
D3
8
FROM
D2
7
DISPLAY PWB
D1
6
D0
CNS775
5
RS
P51 12-A
4
RD
3
WR
2
CS3
1
FROM
CNP970
DISPLAY PWB
RES
4
D_GND
CNS752
3
+5V
2
P51 12-B
+13R5V
1
C
FROM
CD SERVO PWB
CNS960
CNP900
P47 12-E
GND(D)
1
CAM_SW1
2
FROM
CAM_SW2
3
CAM SWITCH
GND(D)
4
CAM_SW3
BIM3
5
CAM_SW4
P47 11-G
6
CNP980
PU_IN
1
SL–
2
SL+
3
DRF
4
D
WRQ
5
RES_CD
FROM
6
CQCK
CD SERVO PWB
7
COIN
CNS980 8
SQOUT
9
P47 8-H
RWC
10
TRY_SW4
11
TRY_SW3
12
TRY_SW2
13
TRY_SW1
14
CNP990
CD_L_OUT
1
CD_A_GND
FROM
2
CD_R_OUT
CD SERVO PWB
3
CD_9V
E
CNS990 4
CD_7V
5
P47 9-H
CD_GND
6
M_GND
7
CNP905
A/D_SW
1
FROM MIC PWB
NAME_IN
2
CNS610 D_GND
3
P38 1-E
R1005
F
CNP915
A_11V
1
A_-11V
2
MIC_L-CH
3
FROM MIC PWB
A_GND
4
MIC_R-CH
CNS660A
5
MIC_SW
P38 1-C
6
RLY_OUT
7
8
G
CNP935
EX_MD-R
1
MIC_GND
2
EX_MD-L
3
MIC_GND
4
AUX_OUT-R
FROM MIC PWB
5
MIC_GND
CNS630 6
AUX_OUT-L
7
P38 1-B
MIC_GND
8
AUX_IN-R
9
MIC_GND
10
AUX_IN-L
11
H
1
: Eliminated/Change PARTS
C901
390P
R905
1K
R906
1K
DUBB MODE
R904
1K
STOP
SKIP+1
R911 R917
2.7K 3.3K
R912 R918
2.2K 1.8K
+B
L910
100µH
R914
5.6K
R916
5.6K
R915
5.6K
R907
5.6K
R908
5.6K
R909
5.6K
R910
5.6K
+B
Q998
KRC107M
2
3
0V
1
0V
R919
R920
12K
R921
22K
R922
22K
R923
22K
0V
R903
18K
0V
4.8V
Q901
2SC1740 SR
R974
1K
22K
R976
1K
+B
19 18 22 17 16
21 20
P43 12-B
2
Figure 6 SCHEMATIC DIAGRAM (2/7)
INPUT SELECTOR
IC902
R931
BU2092F
100K
1
VSS VDD 18
R932
2 DATA OE
17
39K
4052A
3
CLK SW12 16
4052B
4 LCK1 SW11 15
SRS PASS/ON
5
SW1 SW10 14
NAME SEL
6 SW2 SW9
13
DATA SEL
7
SW3 SW8 12
NEXT
8 SW4 SW7 11
9
SW5 SW5 10
A/D_SW
R1085
R1086
CNP985
R1062
1K
R1061
1K
R933
1K
CAM SW3
31
R934 1K
CAM SW4
32
R935 1K
33 TRY SW1
R936 1K
34 TRY SW2
R937 1K
TRY SW3
35
R938 1K
TRY SW4
36
X901
VDD
37
8MHz
R1057
38 MAIN CLK OUT
C912 22K
39 MAIN CLK IN
10P(CH)
40 VSS
C949 0.047
41 SUB CLK OUT
SUB CLK IN
42
R940 1K
43 RESET
R941 1K
44 RX IN
R942 1K
P-IN
45
R943 1K
46 NAME IN
R944 1K
47 KB DATA IN/OUT
KB CLK IN/OUT
48
R945
49 PROTECT
1K
R946
DSTB
50
1K
R965
1K
C923
0.022
C922
0.022
A/D_SW
+B
RES
C915
0.022
15 2 9
10
P42 1-G
3 4
– 6 –
1 2 3 4
IC902
PIN
NO. VOLTAGE
+B
1 0V
2
0.2V
3
4.8V
4
4.7V
5
0V
6
0V
CNS
2 1
7
0V
999A
8
0V
9
0V
10 0V
CNS
2 1
11
0V 999B
12
0V
13
0V
14
0V
15
0V
16
0V
17
0V
18 4.8V
R1084
27K
R1083
27K
27K
27K
5 4 3 2 1
IC901
IX2717AF
SYSTEM CONTROLL MICON
R966
3.3K
R1046
10K
R1047
R1044
10K
10K
R954
220K
IC903
PIN
NO. VOLTAGE
1 2
1
4.8V
3
2
0V
3
4.8V
IC903
PST9140
RESET
H
5
5 6
CNP999
+B
B A SEL MODE
L L C0 CD
L H C1 PC
H L C2 OPT
H H C3 PIN
IC904
PIN
NO. VOLTAGE
R1071
1
4.7V
47K
2
0.2V
3
0V
4
0V
5
0V
6
0V
7
0V
8
0V
9
2.4V
10
2.4V
11
4.8V
12
4.3V
13 0V
14
0.2V
15
0V
16
4.7V
+B
LOAD_SW
C924
0.022
VSS
100
R
TUNER MUTE 99
NC 98
R
POWER DOWN 97
R
FAN MOTOR 96
R
CCB-CL
95
R
CCB-DI 94
R
CCB-DO 93
R
CCB-CE 92
R
JOG_1
91
R
JOG_2
90
R
DIG_A 89
R
DIG_B 88
R
POWER 87
R
RLY_OUT
86
R
L-MUTE 85
R
S-MUTE 84
R
MIC MUTE 83
R
82
CD-MUTE
R
PU IN
81
6