Panasonic SL-CT720P / SL-CT720PC / SL-CT720EB / SL-CT720EE / SL-CT720EG Service Manual ▷ View online
·
This schematic diagram may be modified at any time
with the development of new technology.
with the development of new technology.
Notes:
S201:
Laser ON/OFF switch in ON position
(It turns ON with disc holder closed.)
(It turns ON with disc holder closed.)
S202:
Rest detector switch in OFF position
(It turns ON when optical pick-up
comes to innermost periphery.)
(It turns ON when optical pick-up
comes to innermost periphery.)
S301:
Play/pause (
) switch
S302:
Volume control switch (VOL-)
S303:
Volume control switch (VOL+)
S304:
R.skip/search (
) switch
S305:
F.skip/search (
) switch
S308:
Stop/turn off (
) switch
S310:
Hold (HOLD) switch in OFF position
·
Important safety notice:
Components
identified
by
mark
have
special
characteristics important for safety.
Furthermore, special parts which have purposes of fire-
retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used.
retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used.
When replacing any of components, be sure to use only
manufacturer’s specified parts shown in the parts list.
manufacturer’s specified parts shown in the parts list.
·
The supply part number is described alone in the
replacement parts list.
replacement parts list.
·
Voltage and signal line
: Positive voltage line
: Playback signal line
·
Circuit voltage and waveform described herein shall be
regarded as reference information when probing defect
point, because it may differ from an actual measuring value
regarded as reference information when probing defect
point, because it may differ from an actual measuring value
due
to
difference
of
Measuring
instrument
and
its
measuring condition and product itself.
Measurement conditions:
−
−
−
−
AC adaptor is used for power supply.
−
−
−
−
Set the hold switch to ON.
−
−
−
−
The parenthesized is the voltage for test disc (1 kHz,
L+R, 0 dB) in play mode, and the other, for no disc in
stop mode.
L+R, 0 dB) in play mode, and the other, for no disc in
stop mode.
Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put a conductive mat on the work table.
Do not touch the legs of IC or LSI with the fingers directly.
9 Type Illustration of ICs, Transistors and Diodes
C0CBAFD00003
C0DBAFE00017
C0CBCBZ00001
C0DBAFE00017
C0CBCBZ00001
B1ABMD000004
UMG6NTR
2SB709ATX
2SD1819ATX
DTA143EUA106
UN5214TX
UN5115TX
UN5111TX
UN5114TX
2SD1819ATX
DTA143EUA106
UN5214TX
UN5115TX
UN5111TX
UN5114TX
B1CFHA000002
B1CHMC000007
B1CHGD000006
B1CHMC000007
B1CHGD000006
1
3
4
5
2
No.1
No.1
C
B
C
E
B
C
B
C
E
E
C
B
S
D
G
2SB1182TLPQR
B3AAB0000037
C
B
E
C
B
E
C0DBAFG00014
C3EBCG000096
C3ABPG000145
C3EBCG000096
C3ABPG000145
24PIN
8PIN
54PIN
MA111TX
A
Ca
Anode
Cathode
MN6627962JB
C0GBF0000017
C2BBGF000656
C0GBF0000017
C2BBGF000656
128PIN
48PIN
80PIN
80PIN
B1GFGCAA0001
Ca
A
Cathode
Anode
MA8056MTX
A
Ca
Anode
Cathode
C
C
E
E
B
B
D
G
S
XP161A1355PR
B0JCDD000002
Anode
Cathode
A
Ca
MA729TX
A
Ca
Anode
Cathode
10 Schematic Diagram Notes
13
SL-CT720P / SL-CT720PC / SL-CT720EB / SL-CT720EE / SL-CT720EG
14
SL-CT720P / SL-CT720PC / SL-CT720EB / SL-CT720EE / SL-CT720EG
11 Schematic Diagram
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
FOCUS
COIL
COIL
TRACKING
COIL
COIL
B
D
C
A
GND
F
V
CC
B
LD
GND
E
VREF
A
LPD
1
2
3
4
5
6
7
8
9
10
2K
TE(F)
RF(-A)
TE(E)
GND
GND
GND
F+
T-
F-
T+
LD+
NC
LPD
RF(-B)
VREF
V
CC
0.22
0.22
16
2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
CN101
B
C
D
E
F
G
D
S
Q101
B1CHGD000006
B1CHGD000006
POWER SUPPLY
SL-CT720(P,PC,EG,EB,EE) CIRCUIT DIAGRAM
CN401
M
M
8
3
4
2
5
6
7
1
TRAVERSE
MOTOR
SPINDLE
MOTOR
S202
(REST DET.SWITCH)
A
B
C
D
OPTICAL PICK-UP
F
E
D101
MA1
1
1TX
L401
47
H
L402
47
H
L403
47
H
C205
0.1
IC301
C2BBGF000656
C2BBGF000656
SYSTEM CONTROL
S310
(HOLD)
ON
OFF
S302
(VOL
-
)
S303
(VOL
+
)
R371
1K
Q307
DTA143EUA106
DTA143EUA106
POWER SUPPLY
(REMOTE)
(REMOTE)
R301
3.9K
R308
4.7K
R312
8.2K
J
K
N
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
RFQFE
ZAN/JVDGE
HOLD
A.SHOCK
PLAY
REST
ZANSEL
FSSEL
X3SEL
CHGSEL3
CHGSEL
XBSSEL
XCSEL
TYPESEL
KANASEL
LASEQICSEL
NC
NC
NC
LED
NC
NC
NC
TXPOWER
MUTEL
JACKM1
JACKM2
HIGHMA
T
REMOCON
NC
NC
NC
NC
NC
NC
NC
NC
VL1
BLKCK
VL3
VL2
NC
BUZ
MUTEH
HPCNT
Vcc
XOUT
XIN
Vss
XCIN
XCOUT
RESET
CNVss
GUP
ICTRL
PC2
PC1
IDOWN
FG
NC
KEY
VMONIT
OR3
VMONIT
OR1
VMONIT
OR2
DOCT
OR
REMKEY
VREF
A
Vss
DOT
ACDET
ECS
S
TAT
MDA
T
A/DIDO
MCLK/SK
CHARGE2
CHAGE1
MLD
POWER
OPEN
NRFDETSEL
F
C304
100P
O
Q
S T U
W X Y
R325
33K
P
R326
1K
R324
27K
C
R304
1M
R302
100K
C302
1
Q304
UN5214TX
UN5214TX
MUTING CONT.
R397
100K
100K
Q305
UN5114TX
UN5114TX
LED DRIVE
G
D
S
D501
B0JCDD000002
Q502
B1CFHA000002
B1CFHA000002
SWITCHING
R310
1K
R329
100K
R359
10K
A
M
L
Z
e
O
C301
1
S301
(/)
b
M
B
IC401
C0GBF0000017
C0GBF0000017
4ch MOTOR DRIVE
C401
0.1
B C
A
D
C431
2200P
C437
1
C404
1
A
B
C
C402
0.1
R401
4.7K
C405
4700P
C407
0.22
E
F
R405
47K
B
A C
D
C406
10V22
C403
0.1
C412
0.1
13 14 15 16 17 18 19 20 21 22 23 24
12
11
10
9
8
7
6
5
4
3
2
1
25
26
27
28
29
30
31
32
33
34
35
36
48 47 46 45 44 43 42 41 40 39 38 37
RF
COM
VS
CP1
CPC1
CP2
CPC2
VG
Vcc
FG
FIL
COMN
S/
S
PWM
BRK
MODE1
MODE2
NC
RMAX
VCOIN
VCO
VGREG
VSMON
TGND
PGND3
OUT3R
MUTE
VS3
IN1F
IN1R
IN2F
IN2R
IN3F
IN3R
CLK
GND
UOUT
VOUT
WOUT
OUT1R
VS1
PGND1
OUT1F
OUT2F
PGND2
VS2
OUT2R
OUT3F
D
E
N
F
G
H
I
J
K
L
M
IC302
C3EBCG000096
C3EBCG000096
EE PROM
DO
DI
V
CC
NC
GND
NC
5
6
7
8
4
3
2
1
SK
CS
R316
1K
R341
100K
O
R201
2.2
R202
22K
R314
15K
S308
()
R331
27K
S304
()
S305
()
R321
100K
C303
2200P
C306
1
D361
B3AAB0000037
(CHG)
R306
180
R
V
R59
56K
R58
56K
56K
RJ402
0
SL101
(SHORT LAND)
S201
(LASER ON/OFF)
a
R311
1K
I
R320
1K
R315
1K
R374
1K
R317
1K
R318
1K
d
Q503
2SB709ATX
2SB709ATX
LASER POWER
DRIVE
DRIVE
G
H
A
R503
2.2
RJ501
0
Q602
UN5114TX
UN5114TX
(OPEN)
0V
2.5V
2.5V
: PLAYBACK SIGNAL LINE
: POSITIVE VOLTAGE LINE
0V
(1.2V)
2.5V
0V
2.5V
0V
(2.4V)0V
2.5V
1.1V
1.2V
2.5V
2.5V
2.4V
2.4V
2.5V
2.5V
(2.5V)
(0V)
2.4V
2.4V
2.4V
(0V)
2.5V
0V
2.5V
0V
2.5V
2.5V
2.5V
2.5V
2.5V
0V
0V(1.9V)
2.1V(1.5V)
2.4V
2V
2.5V
0V
2.4V(0V)
0V
0V
0V(1.1V)
2.4V(1.9V)
2.4V
2.4V(0V)
0V(2.4V)
2.4V
2.5V
0V
(0V)
2.4V
(2.4V)
0V
2.5V
2.5V
2.5V
0V
(2.4V)
3.9V
(2.8V)
0.1V
0V
3.9V
(2.8V)
(2.3V)
0V
0V
0V
0V
0V
2.5V
3.9V(2.8V)
0V
0V
0V
0V
0V
0V
1.1V
( 1.4V
) 1.9V
3.9V
0V
0V
0V
0V
0V
0V
(0.6V)
(0.3V)
(0.3V)
(0.6V)
(2.5V)
0.1V
(2.8V) 3.9V
(0.3V)1.2V
(2.7V) 3.6V
(2.1V)1.2V
(6.6V) 6.1V
(6.9V)7.3V
2.5V
0.1V
0.1V
(1.2V) 0V
(2.4V)
(2.4V)
(2.4V)
0.1V
(2.3V)
0.1V
(2.3V)
(0.1V)
(0.1V)
2.5V
2.4V
0V
2.4V
(1.9V)
2.4V
(1.9V)
0V
0V
0V
0V
0V
0V
0V
(0V)
2.4V
2.5V
2.5V(1.7V)
0V
(1.8V)
(0V)
2.4V
2.5V
SL-CT720P / SL-CT720PC / SL-CT720EB / SL-CT720EE / SL-CT720EG
15
13
14
15
16
17
18
19
20
21
22
23
24
IC501
MN6627962JB
MN6627962JB
SERVO AMP/SERVO PROCESSOR/
DIGITAL SIGNAL PROCESSOR/
DIGITAL FILTER & D/A CONVERTER
DIGITAL SIGNAL PROCESSOR/
DIGITAL FILTER & D/A CONVERTER
R502
56K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
48
49
50
51
52
53
54
55
56
57
65 66 67 68 69 70 71 72 73 74 75
85
76
86
77
87
78
88
79
89
80
100
81 82 83 84
33
34
35
36
37
38
39
40
41
43
44
45
46
47
42
UDQM
D8
D9
D10
D11
D12
D13
DRV
DD
2
D14
D15
D7
D6
D5
D4
D3
D0
D1
D2
DV
SS
3
GIO0
AV
DD
1
HPCNT
IOV
DD
2
X2
X1
DV
SS
2
AV
DD
2
LOOUTL
AV
SS
1
A
VREF
LOOUTR
HPV
DD
L
HPOUTL
HPVssL
HPV
DD
R
HPOUTR
HPV
SS
R
NTEST
DV
DD
2
ATOFS
FEIN
AFOFS
CEA
RFENV
FEOUT
TEOUT
TEN
ADPV
CC
CLD
E
V
DD
LD
V
DD
DRV
TEIN
VREF
DUTYADJ
CKMON
PD
LD
FEN
DV
SS
1
A7
A6
A5
A4
LDQM
NCAS
NWE
NRAS
CKE
A3
A2
A1
A0
REGON
DR
V
DD
1
DV
DD
1
A10
BA1
BA0
21
22
23
24
PWMSEL
SPOUT
25
SPPOL
TR
VP
TR
VM
DV
DD
3
NRST
FLAG
TX
PMCK
SMCK
PLLFO
PLLF
IREF
DSLF
ARFIN
F
B
C
A
DCDET
L704
470
H
C510
1
C513
100P
C504
0.1
R505
680
C561
0.1
U
X
b
a
A
B
C
D
F
H
I
J
K
L
M
N
P
D
C
F
E
B
U
V
X
Y
Z
a
b
m
d
e
f
E
G
O
B
A
C704
0.1
C703
0.1
D502
MA729TX
C701
10V220
C702
1
C506
1
L502
100
H
L504
100
H
G
T
S
IC502
C3ABPG000145
C3ABPG000145
64M SDRAM
26
27
28
29
30
31
32
58
59
60
61
62
63
64
90 91 92 93 94 95 96
97
98
99
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
BLKCK
STAT
MLD
TRP
TRM
FOP
FOM
IOV
DD
1
AV
DD
3
AV
SS
3
RFV
DD
RFN
RFOUT
RFIN
CAGC
ARFOUT
AV
SS
2
GIO1
GIO2
EXT0
EXT1
EXT2
MCLK
M
D
ATA
SDRCK
A11
A9
A8
V
CC
28
V
SS
V
CC
29
A4
30
A5
31
A6
32
A7
33
A8
34
A9
35
A1
1
36
NC
37
CKE
38
CLK
39
DQMU
40
NC
41
V
SS
42
DQ8
43
V
CC
Q
44
DQ9
45
DQ10
46
V
SS
Q
47
DQ1
1
48
DQ12
49
V
CC
Q
50
DQ13
51
DQ14
52
V
SS
Q
53
DQ15
54
V
SS
A3
A2
A1
A0
A10
BA1
BA0
NCS
NRAS
NCAS
NWE
DQML
V
CC
DQ7
V
SS
Q
DQ6
DQ5
V
CC
Q
DQ4
DQ3
V
SS
Q
DQ2
DQ1
V
CC
Q
DQ0
1
27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
J K L M N O P
H G F E
d
e f
g h
n
j
i
D C B A Q R S
I
T U
V
W X
Y Z
a
b
m
g
h
i
j
n
W
T
S
R
Q
Q504
UN5111TX
UN5111TX
POWER SUPPLY
Q505
UN5214TX
UN5214TX
POWER SUPPLY
CONT.
CONT.
K
Z
I
X502
(16.9344MHz)
R518
1M
R519
150
R521
100K
C707
2200P
R51
1
2.2K
R512
2.2K
R520
2.2K
C505
0.022
C507
4V100
C531
390P
390P
R514
680
C529
1
C526
0.1
C524
1
C528
1
C520
0.022
C523
1
R508
6.8K
C521
1500P
R507
10K
R506
82K
R504
75K
C516
0.022
C519
180P
180P
N
G H I
J K L E D
R513
100
C522
1
R517
100
C533
270P
R516
100K
100K
C518
330P
330P
VREF
A
RF
R509
3.3
C527
100P
C515
4.7
C517
1
C61
1
0.1
R515
15
R601
0
C532
270P
SL-CT720(P,PC,EG,EB,EE) CIRCUIT DIAGRAM
R209
220K
220K
C202
6.3V22
1
3
2
R208
100K
C208
1
R524
100K
R207
10K
H
(1V) 0.4V
(0.9V) 0V
(1.6V) 1.4V
(1.6V) 1.4V
2.5V
(1.1V) 0V
(1V) 1.2V
1.2V
(1V) 1.2V
(1.5V) 1.2V
(1.5V) 1.2V
2.5V
2.5V
(0.1V) 0V
0.6V
1.2V
1.1V
1.2V
(1.2V) 0.8V
(1.1V) 0.8V
(1.1V) 1.9V
(2V) 0V
(1.1V) 0.8V
1.2V
(1.4V) 1.9V
2.5V
2.5V
0V
(0.1V)
0V
0V
0V
0V
0V
0V
0V
(0.6V)
0V
0V
0V
1.5V
3.3V
0V
(1.6V)
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
(0.1V)
3.1V
3.1V
3.1V
3.1V
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
0V
0V
0V (0.1V)
3.1V
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
3.3V
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
0V (1.5V)
1.5V
2.5V
1.1V
0V
0V (1.1V)
2.4V
(1.9V
)2.4V
2.4V
(2.4V)0V
0V
1.2V
1.5V
2.5V
1.2V
1.2V
2.5V
(1.5V)0V
3V
(1.5V)0V
3V
2.5V
3.1V
2.5V
(1.1V)1.5V
(1.1V)1.5V
0.8V
1.2V
(1.2V)
1.5V
2.5V
0V
0V
3.3V
3.3V
3.3V
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
(1.6V)
0V
0V
0V
3.1V
3.1V
3.1V
3.1V
3.3V
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
3.3V
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
3.3V
0V
(1.5V)
3.3V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
3.3V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
3.3V
(1.5V)
0V
3.1V
(0.1V)
0V
(0.1V)
0V
0V
0V
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
(1.5V)
0V
: PLAYBACK SIGNAL LINE
: POSITIVE VOLTAGE LINE
(1.7V) 2.5V
(1.7V) 2.5V
SL-CT720P / SL-CT720PC / SL-CT720EB / SL-CT720EE / SL-CT720EG
16
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