Sharp CD-C491H (serv.man4) Service Manual ▷ View online
– 25 –
CD-C491H
Figure 25 BLOCK DIAGRAM (3/5)
9
7
7
12
13
5
DEM0
DEM1
DEM1
XT1
BICK
LRCK
6
PD
16
20
22
2
14
15
24
8
18
17
17
+B12
1 3
10 11 21
A-GND
D3-GND
CENTER
SUB
WOOFER
CENTER
SUB
WOOFER
54
80
9
7
7
12
13
5
DEM0
DEM1
DEM1
XT1
BICK
LRCK
6
PD
16
20
22
2
14
15
24
8
FL/FR
18
17
17
FL
FR
FR
+B12
1 3
10 11 21
A-GND
D3-GND
89
87
82
34
3
SS
SO
RESET
SCK
SI
79 91
CLK2L/R OUT
92
CLK2OUT
97
95 66
CLK2L/R
CLK
SCK
SCK2IN
5
55 59 67 70 81 84 93
+B13
6
12 17 30 35 45
48
90
78
94
86
85
62
60
6
2 8
19 29 37 44 53 65 68 71
D3-GND
ND
CENTER
SUB
WOOFER
OUT
IN
IN
OUT
FL/FR OUT
ICA18
ZR38600
DOLBY AC-3 /5.1
MPEG2 AUDIO
DECORDER
SUB
WOOFER
OUT
FL/FR
OUT
CENTER
OUT
SS
SO
SCK
SI
DEMO1
DEMO0
AC3 RESET
SUB
WOOFER ON/OFF
AD RESET
4
8
SUB
WOOFER
IN
4
5 6
12
13
13
QA03
11
10
A-GND
7
14
QA01
QA02
QA02
–B12
+B12
8
1
9
2
5
7
–B12
+B7
ICA21
NJM4580M
–15dB AMP
SUB
WOOFER
OUT
SUB
WOOFER
ON/OFF
SWITCHING
FL/FR
VOLTAGE
REGURATER
VOLTAGE
REGURATER
+B7
+B12
–B6
–B12
VOLTAGE
REGURATER
UN-SWITCHED
+B9
+B13
QB01
ICA19
AK4321
D/A
CONVERTER
ICA20
AK4321
D/A
CONVERTER
GND
VDD
4
8
+B7
–B12
3
5
5
1
7
IN
MIX
L
R
R
OUT
ICB01
NJM4580M
MIX AMP
SUB
WOOFER
ICA22
BU4066BCE
SWITCH
TO MAIN SECTION
TO MAIN SECTION
CD-C491H
– 26 –
Figure 26 BLOCK DIAGRAM (4/5)
7
9
5
3
7
1
8
4
7
16
11
15
14
12
10
13
1
5
2
4
2
2
1
1
6
3 4 5
7
20
22
15
16
11
10
13
12
21
17
2
4
5
8
9
17
19
20
18
16
15
14
12
11
10
13
21
22
23
24
3
7
6
8
8
6 7
3
1
5
4
2
23 22 21 20
15 14 13
12
1
24
23
2
3
4
4
4
5
6
7
8
9
16
14
13
12
15
19
10
17
18
20
21
3
4
42
41
40
18
19
20
3
L
SPE IN
IC
QS
Q-S
L
B.P.F
R
L-IN
R-IN
L-OUT
R-OUT
C-IN
SL
IN
C-OUT
L
R
R
L
R
R
R
L
L
R
R
TAPE
L
R
FUNC-A
FUNC-B
R
IN
OUT
L
R
ICZ09
NJM4565D
LINE AMP.
LINE AMP.
–B10
+B10
+B10
–B10
TUNER
VCR 1
VCR 2
L
JR11
VCR/AUX1
JR12
VCR/AUX2
ICH11
SWITCHING
M
MM1
TAPE
MOTOR
+B2
TA MOT H/L
HI SPEED
TA MOT SW
DRIVER
MOTOR
DRIVER
DRIVER
DRIVER
QL13
QL11
QL12
QL18
QL14
T1/T2 SOLENOID
DRIVER
SOL1/2
SOLENOID
T1/T2 CrO2
QL15
QL19
QL19
SWM5
T1 RUN2SW
SWM6
CAM SW
SWM3
REC FWD
SWM4
REC REV
SWM1
T1 CrO2
SWM2
T2 CrO2
+B6
CAM SW
PHM1
T22RUN
QK13
QK14
QK14
AM LOOP ANT
SO301
ANTENNA
TERMINAL
AM RF
AM ANT
FM IF
FM
OSC
GND
AM IF
T351
FMOSC
FM IN
AM
IN
IC302
TC72131
PLL CONTROLLER
STEREO
OSC
FM
FM IF
Q301
FM IF
AMP
FM IF IN
VCC
IN
AM
VR351
FM MUTE LEVEL
OUT
IN
AFC
AM RF IN
MONO/ST
FM MONO/ST
SD
IF
OUT
IC303 LA1832
FM/AM IF MPX
IF IN
FM/AM
OUT
MPX
IN
MPX
PHASE
Q353
Q354
Q354
L
MPX
VCO
CUT
VCO
CUT
MUTING
Q360
FE301
FM FRONT END
S0012AW
DI
CE
DO
CF302
T301
T302
T302
VT
XT21
FM +B
AMP
QT21
+5V
VOLTAGE
REGURATER
SD
TUNER MUTE
SM
+B7
+B7
+B7
+B7
CF351
FM IF
X351
456kHz
ICT21
LC72720
RDS DECORDER
XT21
4.332MHz
CE
DI
MPX
IN
XOUT
VDDD
VSSD
QL16
ERASE
HEAD
L-CH
R-CH
R-CH
PB HEAD
L-CH
R-CH
R-CH
REC/PB
HEAD
P.B
AC BIAS
P.B
REC
TAPE 2
TAPE 1
T1/T2
L NF
R NF
R NF
L(T1)
R(T1)
R(T1)
L(T2)
R(T2)
R(T2)
L
R
POP REDUCE
L REC
R REC
R REC
L
R
REC
ALC
NOR/
HIGH
HIGH
T1/T2
REF
+B7
P.B
REC/PB
MUTING
MUTING
PB MUTE
REC MUTE
L NF
R NF
SWITCHING
SWITCHING
QK21
QK22
QK22
QK28
LK04
QK07
QK08
QK08
QK11
QK10
QK09
QK03 QK05
QK04 QK06
QK04 QK06
QK19
QK15
QK16
QK16
QK17
QK18
QK18
SWITCHING
BAIS
QK26
QK24
BAIS
PB-EQ
T1 Cr02
T2 Cr02
HI SPEED
T2 REV-REC
T2 FWD-REC
QK31
QK32
QK32
QK27
Cr02
QK25
SWITCHING
BEAT CHANCEL
SWITCHING
LEVEL SHIFT
QK30
QK29
QK40
QK40
L341
BALUN
X352
4.5MHz
Q371
VSSA
VDDA
DO
QZ03
QZ04
QZ04
ICZ08
TC4052BF
FUNCTION
SELECTOR
TO DOLBY SECTION
ICK01 AN7345K
PLAYBACK&RECORD/
PLAYBACK AMP.
H/N
T1/T2
P.B.
REC
CF301
R
REG
OUT
OSC
AM OSC
T305
T306
T306
CL
DO
CL
XIN
R
R
QL17
REC/PB
Cr02
SWITCHING
L
BIAS OSC.
VRM1
TAPE
SPEED
– 27 –
CD-C491H
Figure 27 BLOCK DIAGRAM (5/5)
8
4
1
7
3
5
23
62 61 60 25 78 79 87 88 91 92 93 94 95 96 97 98
10
100
11
14
13
18
56
90
15
57
89
56
90
15
57
89
12
16
17
27
86
85
84
76
66
65
64
63
54
52
51
50
49
27
26
24
82
73
74
75
53
58
59
69
70
71
67
68
55
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
99
19
4
3
5
7
5
3
1
9
8
8
20
5
3
1
9
8
8
20
16
12
12
18
9
11
16
17
8
39 40 41
31
32
32
33
34
35
35
36
30
42
16
17
14
14
6
7
1
2
9
8
7
6
5
4 5 4 7
0
5 5 2
7 1 7 3
5
7 5
3 0
1
29
12
95
96
97
10
84
84
84
88
94
94
10
15 89 18 46 72 90 51 13 14
27 28
26
21
17
16
57
53
62
88
85
91
91
94
91
79
8
3 4
1
2
2
1
4
8
8
4
9
10
31
15
45
44
42
41
40
12
13
16
17
18
19
20
1
1
8
4
1
R
L
IN
OUT
L
R
N
~
SPE1~5
RES
CQCK
COIN
SQ OUT
WRQ
WRQ
RWC
CD SL+
CD-PUIN
CD-DRF
CD-DRF
+B4 (5V BACK UP)
+B3
VDD
+5V
UNSWITCH
+B2
UNSWITCH
+B2
MEMORY
BACK UP
BACK UP
VSS
+B4
RESET
OSC
X201
4.19MHz
4.19MHz
SYSTEM STOP
P.FAIL DET
+B3
RESET IN
CD SL–
+B7
+
L-CH
GND
R-CH
GND
C-CH
GND
M
FAN
+B6
PROT
RELAY
H/P SW
SP DET
L-IN
R-IN
POSISTOR
TO CD UNIT
–B
+B
ICP11
NJM4565D
LOW BOOST AMP.
NJM4565D
LOW BOOST AMP.
ICV01
STK407-250
POWER AMP.
STK407-250
POWER AMP.
L-OUT
R-OUT
C-OUT
R-OUT
C-OUT
–
+
–
+
–
QV20
QV21
QV21
QV22
QY21
QY21
QV13
QV14
QY11
QV14
QY11
VOLTAGE
REGULATOR
SWITCHING
VOLTAGE
REGULATOR
+12V(ANALOG)
+12V(MOTOR)
UN-SWITCHED
+B2
+B6
+B7
–15V
–B6
VOLTAGE
REGULATOR
+7.3V(CD)
TO CD UNIT
VOLTAGE
REGURATER
T.F
VF1
(AC)
VOLTAGE
REGULATOR
REGULATOR
+B
–B
D991
F995
T8A L 250V
F996
T8A L 250V
T991
POWER
TRANSFORMER
Q951
F998
T1.6A L 250V
F997
T2.5A L 250V
D992~D995
D996~D999
Q904
Q903
Q902
Q901
Q901
Q906
Q905
Q905
+B8
Q909
Q908
Q908
+4.6V
–B
+B
SL-OUT
SR-OUT
SW-OUT
SR-OUT
SW-OUT
SL-IN
SR-IN
C-IN
SW-IN
+
–
+
+
–
+
+
TMV01
SPEAKER
TERMINAL
SPEAKER
TERMINAL
JV91
HEADPHONES
HEADPHONES
TMV01
SPEAKER
TERMINAL
SPEAKER
TERMINAL
ICQ01
QS7777PF
Q-SOUND
L R
L-IN
R-IN
L-OUT
R-OUT
C-IN
SL-IN
C-OUT
SR-IN
SL-OUT
SR-OUT
MO
AC
AR
BYP
+B7
+B7
VOLTAGE
REGURATER
REGURATER
L-IN
R-IN
L-OUT
R-OUT
R-OUT
C-IN
C-OUT
ICZ10
M62446FP
6-ch VOL
SL-IN
SR-IN
SL-OUT
SR-OUT
SR-OUT
SW-OUT
SW-IN
QV18
–B6
TU-DO
TU-SD
T1 CrO2
T1 RUN
T2 RUN
T2 A FP
T2 B FP
T2 CrO2
CAM-SW
TAPE SOL
TA MOT
FR SP
BIAS
TA R/P
REC MUT
T1/T2
PB MUTE
QS2AR
QS2AC
QS2MO
FAN
SP DET
POSISTOR
H/P SW
PROT
FRONT RELAY
SURROUND RELAY
CENTER RELAY
S-W RELAY
S-MUTE
POWER
S-W-MUTE
CENTER-MUTE
SURROUND-MUTE
QG01
QG02
QG03
QG03
ZDF01
FUNC B
FUNC A
STB
RES
SCK
DAT
COM
AD RES
SW ON/OFF
DIGITAL1
DIGITAL2
AC32SI
AC32SCK
V1/V2
DEM 0
DEM 1
CD U/D
CD O/C
CD DNO
VR CLK
VR ST
VR DATA
VR CLK
VR ST
VR DATA
DI
TU CL
CLK2
ICZ01
LC7522
G.E. VOL
VOLTAGE
REGULATOR
+B10
–B10
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
REGULATOR
–B10
+B10
SL-CH
GND
SR-CH
SW-CH
GND
GND
ICX01
STK407-250
POWER AMP.
STK407-250
POWER AMP.
QY52
QX20
QX20
RLYV11
RLYY11
RELAY
RLYY11
RELAY
RLYX11
RLYY51
RELAY
RLYY51
RELAY
QX51
QX13
QX14
QY51
QX14
QY51
–B10
+B10
+B11
F991
T2.5A L
250V
T2.5A L
250V
TUNER MUTE
F999
T500mA L 250V
BEAT CUT
TA PB EQ.
CE1
TU-SM
ICF01
IX0254AW
SYSTEM CONTROL
MICROCOMPUTER
TO DOLBY SECTION
~ ~
~
~
~
KEY MATRIX
ICD01
IX0234AW
SYSTEM MICROCOMPUTER
SWD03~SWD06
SWD12~SWD17
SWD23~SWD48
SWD50~SWD54
SWD12~SWD17
SWD23~SWD48
SWD50~SWD54
RXD01
REMOTE
SENSOR
DAT
COM
STB
RES
~
KEY IN
JOG SW
~
~
~
~
~
FD01
FL DIPLAY
F1
F1
F1
F2
F2
F2
SWD02
SWD01
–VP
VEE
+B2
VDD
VSS
~
~
~
~
~
LEDD01~
LEDD23~28
LEDD23~28
+B6
LED01~
LED21,
LED23~
LED28
QD01~
QD08,
QD10~
QD12
+B2
XD01
M901
FAN
MOTOR
FAN
MOTOR
–VP
AC POWER
SUPPLY CORD
AC230V 50Hz
SUPPLY CORD
AC230V 50Hz
Q907
POWER
SWITCHING
POWER ON/STB
SWITCHING
QP17
QP13
QP14
QP15
SR-MUTE
SW-MUTE
QR11
QR12
S-MUTE
C-MUTE
QR13
QP11
QP12
QP16
QZ01
QZ02
Q911
Q910
Q910
+5V(AC-3)
+B9
VOLTAGE
REGULATOR
QP91
+B12
VOLTAGE
REGULATOR
ICZ03,05,07
NJM4565D
IN/OUT
FILTER
FILTER
AMP
+B10
–B10
+B10
–B10
CLK
DI
ICZ02,04,06
NJM4565D
IN/OUT
FILTER
FILTER
AMP
QZ03
QZ04
QZ04
VF2
(AC)
(AC)
VF1
(AC)
(AC)
HIGH SP
AC32SS
AC32RES
AC32SO
SCK
VF2
(AC)
(AC)
QX16
QV19
–
16
12
12
18
CD-C491H
– 28 –
Figure 28 SCHEMATIC DIAGRAM (1/20)
A
B
C
D
E
F
G
H
1
2
3
4
5
6
• NOTES ON SCHEMATIC DIAGRAM can be found on page 22.
R46 560
FSS
LDO
DEF
CLK
CL
DAT
CE
DRF
VCC2
REF1
VR
LF2
PHI
BHI
LDS
10
1
8
9
12
R47
10K
C25
27P
R39
1K
C15
0.01
R41
47K
R43
56K
R44
33K
33K
R42
47K
R28
10K
R29 56K
C17 0.001
R30 6.8K
R20 1K
R19 1K
C3
1/50
R34
22K
R48
10K
C36
100/16
IC3
M56748FP
FOCUS/TRACKING/SPIN
/SLED DRIVER
R11
6.8K
C6
0.033
R10
2.2K
2.2K
C5
0.033
C54 0.001
R8
15K
R9
100K
C16
0.0047
R27
39K
R25
1.5K
R23 10K
R24
47K
R17
33K
C29
4.7/50
C28
0.1
C14
0.01
C4
0.1/50
C35
1/50
R1
10
C85
0.001
Q1
KTA1266 GR
R18
15K
C11
0.1
D3
RL104A
R35 220K
C21
0.0033 R36
220K
C20 47/16
C19 1/50
R33
1.2K
R32 10K
C32 0.01
C31
220/6.3
C30
0.1/50
C27 0.001
C24
2.2P
R40
5.6K
C26
0.033
R31 1.2K
C18
0.47/50
R16
3.3K
R15
12K
C10
180P
C8
0.068
C7
0.1/50
0.1/50
R12
100
D4
RL104A
D2
RL104A
C9
0.047
R13
1K
R14
27K
C12
0.1
R2
1K
C1
47/16
C2 0.01
CNP3
R38
470
C23
0.0027
R45 4.7K
C22
220P
IC1
LA9241M
SERVO AMP.
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C13 330P
R37
82K
D1
1SS133
R22
22K
R21
22K
C34
0.33/50
C33
0.47/50
1
2
3
2
3
4
5
5
1
2
3
2
3
4
5
5
CNP1
1
2
3
4
5
CNS1A
CNS1B
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1 2 3 4 5 6
CNP12
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
CNS3A
CNS3B
CNP3A
M
M2
SLIDE
MOTOR
M
M1
DISC
MOTOR
SW4
PICKUP
IN
1
2
3
4
5
6
2
3
4
5
6
7
8
8
1
2
3
4
5
6
2
3
4
5
6
7
8
8
1
2
3
4
5
6
2
3
4
5
6
7
8
8
CNP2
CNS2B
CNS2A
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
1
2
3
4
5
NC
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
NC
CD2PUIN
CD2GND
B
LD
K
PD
A
TR–
TR+
TR+
FO–
FO+
F
E
SL2–
SP+
SP–
SL2+
SP–
SL2+
GND
HF
TP1
TE
TBC
JPCLO
SLOF
SLOF
SLOF
FSC
FE1
FOSTA
FSC
EFBAL
+ –
REF
JP
REF
REF
CV–
CV+
JP–
JP+
VREF
2FREQ
LASER
8/12CM
FSTA
S.Q.R
FOSTA
TOSTA
LATOH
FSTA
SLOF
CL
CE
DRF
HFL
DEF
VCC
THD
GL
THDL
TGL1
VCR
VCR
VCR
VCR
FE1
REF
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
REF
RF
REF
DGND
SLI
VCC1
FIN2
2.4V
4.8V
4.2V
1.5V
2.4V
2.5V
2.5V
2.4V
2.5V
2.5V
2.5V
2.5V
2.4V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2V
2V
0V
0V
0V
0V
0V
2V
2.5V
2.5V
0V
4.7V
0V
2.5V
0V
0V
2.5V
2.5V
1.8V
1.8V
0V
0V
0V
0V
2V
2V
2.5V
2.5V
2.5V
4.7V
0.7V
0V
0V
2.5V
2.5V
2.5V
2.4V
2.5V
0V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.2V
2.2V
0V
0V
4.8V
4.8V
0V
0V
4.8V
0V
0V
1.5V
2.4V
2.5V
2.4V
0V
2.5V
2.5V
0V
0V
2.4V
4V
4V
0V
0V
4.8V
4.8V
2.5V
2.5V
1V
1V
2.2V
4.2V
0V
4.8V
FIN1
E
F
TB
TE–
TE
TESI
SCI
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
TO
REF
JP
REF
TH
TD
TD–
JP
TO
FD
GEN
GEN
GEN
FD–
FA–
FA
FE
FE–
AGND
SP
SPI
SPG
SP–
SPO
SLEO
SLD
SL–
SL+
REF
REF
REF
REF
OR
REF
RF
SLC
RFS–
RFSM
JP–
JP+
TGL
TOFF
TES
HFL
SLOF
CV–
CV+
– +
K
E
A
B
F
E
A
B
F
RES(DSP)
WRQ(DSP)
RWC(DSP)
CQ CK(DSP)
CO IN(DSP)
SQ OUT(DSP)
+B
+B
+B
+
–
+
–
LD
VR
PD
GND
FO–
FO+
TR+
TR–
LD
VR
PD
GND
FO–
FO+
TR+
TR–
K
E
A
B
F
E
A
B
F
LD
K
E
B
E
B
A
F
C
F
C
MON
1M
2200P
1M
2200P
TR+
FO+
FO–
TR–
LT0H30M1
ACTUATOR
TO
CD MOTOR PWB-K
PICKUP UNIT
LD
GND
–
+
–
+
–
+
–
+
– +
–
+
–
+
–
+
–+
–+
–+
–+
–
+
–
+
–+
–
+
–
+
–
+
–
+
R26 82K
7
6
5
4
3
2
LASER
DRIVE
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