Sharp CD-C491H (serv.man4) Service Manual ▷ View online
– 41 –
CD-C491H
7
8
9
10
11
12
Figure 41 SCHEMATIC DIAGRAM (14/20)
XD01
LD01
2.2
µ
H
CD06 0.001
SWD01
VOL JOG SW
CD05 0.001
CD07 0.001
CD08 0.001
SWD02
JOG
CD02
100/10
CD01
0.022
RD36 1K
RD40 1K
RD39 1K
RD41 1K
RD42 1K
RD44 1K
RD38 1K
RD37 1K
RD43 1K
RD35 1K
RD34
820
RD33
1K
RD32
1K
RD31
1K
ICD01
IX0234AW
SYSTEM
MICROCOMPUTER
RD64 10K
RD65 10K
RD60 10K
RD61 10K
RD59
00K
RD45 1K
LEDD25
LMKD515B
LEDD26
LMKD515B
LEDD27
LMKD515B
LEDD28
LMKD515B
LEDD23
LMKD515B
LEDD24
LMKD515B
RD70
820
RD71
820
RD72
820
QD12
KRC107 M
QD11
KRC107 M
QD10
KRC107 M
RD28
1K
SWD39 SWD41
SWD42
SWD48
RE42
1K
RE43
1.2K
RE44
1.8K
RE52
1K
RE41
8.2K
RE51
8.2K
RD27
1K
RD26
1K
SWD53 SWD52 SWD51 SWD50
RE56
3.9K
RE55
2.2K
RE54
1.8K
SWD54
RE57
5.6K
RE53
1.2K
RD29
10K
RD62
8.2K
RD63
1K
SWD40 SWD43
RE45
2.2K
SWD44
RE46
3.9K
RE47
5.6K
RE48
12K
SWD45 SWD46
RE49
27K
SWD47
REMOCON
VDD
VSS
JOG DOWN
JOG UP
VDD
–29(VP)
XCOUT
XCIN
VOL JOG DOWN
VOL JOG UP
AN2
(0V)
AN3
(4V)
(4.0V)
VDD3
(-29V)
S3
S2
(-29V)
(-29V)
S4
(-29V)
S5
(-29V)
S6
(-29V)
S7
(-29V)
S8
(-29V)
S9
(-29V)
S10
(-29V)
S11
(-29V)
S12
(-29V)
S13
(-29V)
S14
(-29V)
S15
VP
(-30V)
(-26V)
S16
(-30V)
S17
(-21V)
S18
S19
(-30V)
R
(0.4V)
G
(9.0V)
-R
(10.8V)
-G
(0.6V)
-R
(10.8V)
-G
(-6V)
(10.8V)
(0.6V)
D-R
(0V)
D-G
PG0
(0V)
(4.1V)
VDD4
(-30V)
S39
RESET
VDD
DISC2
DISC1
DISC3
DISC 1
DISC 2
DISC 3
DVD/VIDEO 1
TAPE
1/2
TUNER
/BAND
CD
DVD/VIDEO 2
G15
G14
G13
G12
G12
G11
G10
G9
G8
G7
G6
G5
G4
G3
G2
G1
S27
S26
S25
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
NC
NC
S19
3
4
5
6
7
8
11 12 13 14
9
10
16 17 18 19
15
20 21
23 24 25 26 27
22
28
29 30
32 33 34 35
31
36 37
39 40 41 42 43
38
44 45
47 48 49 50 51 52 53 54 55 56 57
46
NC
NC
F2
F2
1G
2G
8G
7G
6G
5G
4G
3G
9G
10G
11G
12G
15G
NC
NC
NC
NC
NC
NC
NC
S27
S26
S25
S24
S23
S22
S21
S20
S18
S17
S16
S15
S14
S13
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
NC
NC
KEY4
KEY1
KEY2
KEY5
KEY6
TUN-SET
AUD-SET
POWER
DISK 1
DISK 2
DISK 3
DISC3
OPEN/
CLOSE
DISC
SKIP
DISC2
KEY5
S24
KEY6
LEDD23~LEDD28
VHPLMKD515B-1T
RDS
PTY PT
RDS
EON
RDS
DISPLAY
+B
–B
+B
1
2
3
1
1
2
2
3
3
DISC 3
DISC 2
DISC 1
+B
+B
2
3
4
5
6
1
WHD01
FWD01
1
6
+B
SWITCH PWB-C2
DISPLAY PWB-C
4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
7
81
100
SCK1
(0V)
31
S1
(0V)
13G
14G
KEY3
(0V)
S44
(0V)
S43
(-28V)
S42
(-30V)
S41
(-28V)
S40
(-28V)
S38
(-30V)
S37
(-30V)
S36
(-30V)
S35
(-30V)
S34
(-30V)
S33
(-30V)
S32
(-21V)
S31
(-30V)
S30
(-26V)
S29
(-28V)
S28
(0V)
S27
(0V)
S25
(-28V)
S24
(0V)
S23
(-23V)
S22
S21
(-28V)
S20
(-26V)
(0V)
S26
P31
(0V)
P32
(0V)
P33
(0V)
P34
(0V)
P35
(0V)
P37
(0V)
/RES
(4V)
P74
(4V)
P75
(4V)
VSS1
(0V)
CF1
(1.7V)
CF2
(1.9V)
VDD1
(4V)
AN0
(0V)
AN1
(0.4V)
INT0 FL-SET
(0V)
P36
(0V)
AN4
(4V)
AN5
(4V)
AN7
(4V)
INT1
(4V)
INT2
(4V)
INT3
(3.5V)
S0
(0V)
AN6
(4V)
RDS
ASPM
DISC1
JOG PWB-C4
CD-C491H
– 42 –
Figure 42 SCHEMATIC DIAGRAM (15/20)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 22.
A
B
C
D
E
F
G
H
1
2
3
4
5
6
D991
KBU1003
Q908
KTC3199 GR
Q909
2SD2012
C919
4700/25
Q905
KTC3199 GR
C908
47/25
R909
1K
R908 33K
Q906
2SD2012
C910
47/25
R911
560
D901
1SS133
C907 220/25
ZD903 MTZJ13C
R902
1K
C903
47/25
C904
47/25
C905 47/25
ZD904
MTZJ8.2C
D905
1SS133
Q910
KTC3199 GR
Q911
2SD2012
C914
100/25
R913
560
ZD905
MTZJ6.8C
D906
1SS133
C954
0.22(ML)
C956
0.22(ML)
R903
47
R910
150
R912
47
R914
47
Q907
KRA102 M
SWITCHING
R917
4.7K
Q914 KRC107 C
C902
47/25
R901
47(1W)
R918
100
C920
47/25
Q913
2SB1375
ZD901
MTZJ13A
C906
0.022
C901
0.022
C911
0.022
C915 0.022
C909
0.022
R907
560
F999
T500mA L 250V
R921
100(1W)
+7.3V(CD)
+12V(A)
+12V(M)
+4.6V(D)
GND(D)
GND(M)
+5V(AC3)
+VCC
–VCC
–VCC
+VCC
CD GND(D)
GND
GND
–VCC
–VCC
GND
GND
GND
+VCC
+VCC
GND
GND
–B
+B
+B
+B
VOLTAGE
REGULATOR
Q903
2SD468 C
R904
1.5K
ZD902
MTZJ5.6A
R906
100
R905
22(1/4W)
Fusible
VOLTAGE
REGULATOR
Q902
2SD2012
VOLTAGE
REGULATOR
Q901
KTC3199 GR
1
2
3
–B
+B
–B
–B
+B
+B
–B
–B
+B
–B
+B
BI903
BI904
CNS904
CNS903
CNPX12
P45 7-H
TO SPEAKER
AMP.1 PWB
P45 7-D
TO SPEAKER
AMP.2 PWB
CNPV12
+B
Q910,Q911:VOLTAGE REGULATOR
BI902
P35 12-F
TO MAIN PWB
CNS902
GND(D4)
GND(D3)
+5V(AC32A)
VGND
CNPP02
+B
Q904
KRA107 M
SWITCHING
Q905,Q906:VOLTAGE REGULATOR
1
2
3
CD GND(D)
Q908,Q909:
VOLTAGE REGULATOR
1
2
3
+B
BI901
CNS901
POWER
CD GND(D2)
CD GND(D1)
+4.6V(D)
GND(M)
+12V(M)
+12V(A)
–12V(A)
GND(A)
GND(D)
+7.3V(CD)
P35 12-E
TO MAIN PWB
CNPP01
1 2 3 4 5 6 7 8 9 10 11
1 2 3 4 5 6 7 8 9 10 11
1 2 3 4 5 6 7
1 2 3 4 5 6 7
1 2 3 4 5 6 7
1 2 3 4 5 6 7
4 3 2 1
4 3 2 1
0V
-2.1V
1.2V
7.1V
7.7V
7.8V
8.3V
16.9V
16.9V
12.0V
12.6V
12.8V
13.3V
13.4V
13.4V
1.2V
16.9V
16.9V
13.3V
12.8V
12.0V
12.0V
4.8V
5.4V
16.2V
-12.3V
-12.8V
-13.0V
-2.1V
-22.7V
5.4V
6.1V
6.2V
6.8V
10.7V
10.7V
– 43 –
CD-C491H
7
8
9
10
11
12
Figure 43 SCHEMATIC DIAGRAM (16/20)
F997
T2.5A
L 250V
D993
D995
D994
D992
F998
T1.6A
L 250V
D997
D999
D998
D996
C913
3300/25
ZD951
MTZJ33C
C963
47/50
C964
47/50
ZD952
MTZJ6.8C
D954
1N4004S
R956 100
C965
100/35
R955
12K
D953 1N4004S
C962 47/63
R957 2.2K
D951 1N4004S
C961
220/50
D952 1N4004S
R954
220
R953
220
C960
220/50
C959 220/50
Q910
KTC3199 GR
1
D2012
C914
100/25
R913
560
ZD905
MTZJ6.8C
33
C957
0.047
(ML)
C958
0.047
(ML)
C966
0.047(ML)
C967
0.047(ML)
C954
0.22(ML)
C956
0.22(ML)
K991
K992
R914
47
F991
T2.5A L 250V
F995
T8A L 250V
F996
T8A L 250V
–38V
)
–B
T991
POWER TRANSFORMER
T.F.
AC POWER
SUPPLY CORD (242)
AC 230V,50Hz
CORE
(287)
WHEN SERVICING,PAY ATTENTION AS THE AREA
ENCLOSED BY THIS LINE ( ) IS DIRECTLY
CONNECTED WITH AC MAIN VOLTAGE.
ENCLOSED BY THIS LINE ( ) IS DIRECTLY
CONNECTED WITH AC MAIN VOLTAGE.
+B
–B
D996~D999
1N4004S
VOLTAGE
REGULATOR
Q951
KTA1266 GR
+B
FW901
1
3
–VP
VF1
VF2
P35 12-F
TO MAIN PWB
TAGE REGULATOR
POWER PWB - D
+B
D992~D995
2A02
6.2V
6.8V
10.7V
10.7V
-31.7V
-32.8V
-31.1V
WTP01
CD-C491H
– 44 –
A
B
C
D
E
F
G
H
1
2
3
4
5
6
Figure 44 SCHEMATIC DIAGRAM (17/20)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 22.
RV21
56K
RV19
390
CV19
100/50
100/50
RV13
56K
CV15
470P
RV14
56K
CV16
470P
RV20
390
CV20
100/50
390
CV20
100/50
RV22
56K
56K
CV22
15P
RV24
1K
CV21
15P
RV23
1K
CV18
47P
47P
RV18
1K
CV14
2.2/50
CV12
2.2/50
RV32
1K
RV30
0.2(1W)
0.2(1W)
CV26
0.022
0.022
CV24 47/50
6
7
CV11
2.2/50
CV13
2.2/50
RV17
1K
CV17
47P
RV31
1K
RV29
0.2(1W)
CV23
47/50
RV25
100
(1/2W)
5
11
15
16
CV28
47/50
RY14
56K
RY15
390
CY16
100/50
RY11
56K
CY13
470P
CY15
15P
RY13
1K
CY11
2.2/50
CY12
2.2/50
RY12
1K
CY14
47P
RY17
1K
1K
RY16
0.2(1W)
CY17
0.022
DV15
1SS133
QV18
KTC3199 GR
RX21
56K
56K
RX19
390
CX21
100/50
100/50
RX13
56K
56K
CX15
470P
470P
RX14
56K
56K
CX16
470P
470P
RX20
390
CX22
100/50
100/50
RX22
56K
56K
CX20
15P
RX24
1K
CX19
15P
RX23
1K
CX18
47P
47P
RX16
1K
CX14
2.2/50
CX12
2.2/50
RX32
1K
RX30
0.2(1W)
CX26
0.022
0.022
CX24
47/50
47/50
10
6
7
CX11
2.2/50
CX13
2.2/50
RX15
1K
CX17
47P
RX31
1K
1K
RX29
0.2(1W)
CX23
47/50
47/50
CX25
0.022
0.022
11
CX28
47/50
47/50
RY54
56K
56K
RY55
390
390
CY54
100/50
RY51
56K
56K
CY53
470P
CY56
15P
RY53
1K
CY51
2.2/50
CY52
2.2/50
RY52
1K
CY55
47P
RY58
1K
1K
RY56
0.2(1W)
CY57
0.022
0.022
18
17
QX16
KTC3
KTC3
DX15
1SS133
QX15
KTC3199 GR
ICV01-B
3CH AF
POWER AMP.
STK40725
3CH AF
POWER AMP.
STK40725
ICX01-A
3CH AF
POWER AMP.
STK40725
3CH AF
POWER AMP.
STK40725
RV38
10K
RV37
47K
QV16
KTC3199 GR
1
2
RV36
22K
RV35
2.2K
QV17
KTA1268 GR
RV34
15K
RV33
10K
DV21
1SS133
RV71
820
1 2
14
RX37
47K
RX38
10K
10K
QX18
KTC3199 GR
RX55
10K
CX27
1000/6.3
1000/6.3
RX33
120K
RX35
2.2K
RX36
22K
RX34
15K
(1/2W)
QX17
KTA1268 GR
DX21
1SS133
RX71
820
CV25
0.022
0.022
RV27
10K
QV13
KTC3199 GR
DV13
1SS133
1SS133
RV69
0.2(1W)
RV28
10K
QV14
KTC3199 GR
DV14
1SS133
RV70
0.2(1W)
RY18
10K
QY11
KTC3199 GR
DY11
1SS133
RY26
0.2(1W)
RX27
10K
QX13
KTC3199 GR
DX13
1SS133
1SS133
RX69
0.2(1W)
RX28
10K
QX14
KTC3199 GR
DX14
1SS133
1SS133
RX70
0.2(1W)
RY57
10K
DY51
1SS133
QY51
KTC3199 GR
20
RY66
0.2(1W)
9
8
16
15
9
13
12
8
CV30
3300/50
CV29
3300/50
3300/50
CX30
3300/50
CX29
3300/50
3300/50
CFWV11
9
10
11
12
13
14
15
16
8
7
6
5
4
4
3
2
1
4
19
10
14
13
12
3
RV63
120K
CV27
1000/6.3
RV26
100(1/2W)
100(1/2W)
1
CNPV
2 3 4 5 6 7
T
CFWX11
10
11
12
13
9
8
7
6
5
4
4
3
2
1
4
19
3
RX26
100
(1/2W)
5
RX25
100(1/2W)
100(1/2W)
1
CNPX
2 3 4 5 6 7
CFWP01
TO MAIN PWB
P35 12-D
FWP01
TO MAIN PWB
CFWP02
FWP02
Fusible
RELAY4
OUT6
GND(M)
OUT4
OUT5
FAN SW
RELAY3
VOL2SW
POSISTOR
PROT
AMP
OUT3
RELAY2
OUT1(Lch)
RELAY1
GND(A)
FAN CONT
OUT2(Rch)
SP LEVEL
GND(M)
H/P SW
+12V(M)
FAN SW
VOL2SW
PROT
POSISTOR
AMP
CENTER
FR
NC
+B
Fusible
ICV01-A
3CH AF
POWER AMP.
STK40725
3CH AF
POWER AMP.
STK40725
+B
–B
ICV01-C
3CH AF
POWER AMP.
STK40725
3CH AF
POWER AMP.
STK40725
–B
+B
+B
+B
+VCC
+VCC
GND
GND
–VCC
–VCC
S.W
SU
NC
+B
ICX01-B
3CH AF
POWER AMP.
STK40725
3CH AF
POWER AMP.
STK40725
Fusible
Fusible
ICX01-C
3CH AF
POWER
3CH AF
POWER
@
AMP.
STK40725
+B
–B
+VCC
+VCC
GND
GND
–VCC
–VCC
GND
+B
–B
+B
+B
1
+12V(M)
1
13
16
18
17
20
GND
GND(A)
P35 12-B
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
4.0V
4.0V
36.5V
37V
0V
0V
0V
0V
0V
0V
4.0V
4.0V
4.0V
-37V
-37V
-37V
-36.5V
-36V
4.0V
4.0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
-25V
-25V
-25V
-25V
-24.5V
-24V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0.8V
25V
25.8V
4.0V
4.0V
4.0V
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