Sharp CD-C1H (serv.man4) Service Manual ▷ View online
CD-C1H/CP-C1H
– 45 –
Figure 45 SCHEMATIC DIAGRAM (15/15)
7
8
9
10
11
12
CORE
(268)
(268)
WT853
BI851
L903
2.2
2.2
µ
H(XH)
C938
100P
100P
C937
100P
100P
WT902
CNS901
M901
FAN MOTOR
FAN MOTOR
CNP901
L851
100
100
µ
H (DH)
R995
18K
18K
C994
100/50
100/50
D995
1SS133
1SS133
ZD854
MTZJ4.7B
MTZJ4.7B
R927
4.7
(1/2W)
4.7
(1/2W)
C921
0.1
(ML)
0.1
(ML)
R928
4.7
(1/2W)
4.7
(1/2W)
C922
0.1
(ML)
0.1
(ML)
C865 0.22 (ML)
C852 0.22 (ML)
C866 0.22 (ML)
C851 0.22 (ML)
D851
BR102J02
BR102J02
D870
1SS133
1SS133
RL851
RELAY
RELAY
F857
T5A L 250V
T5A L 250V
F858
T5A L 250V
T5A L 250V
C867
C868
D850
S4VB20
S4VB20
Q851
2SB1375
220/63
C861
ZD853
MTZJ8.2C
F855
T2.5A L 250V
T2.5A L 250V
C859
220/63
220/63
D852
D854
D855
D853
D859
1N4004S
C858
220/50
D858
1N4004S
C860
220/50
R857
2.2K
D860
1N4004S
R851
12K
C857
100/35
100/35
D861
1N4004S
ZD852
MTZJ100D
F853
T2A L 250V
T2A L 250V
C854
0.047
0.047
(ML)
C853
0.047
0.047
(ML)
C855
47/50
47/50
C856
47/50
47/50
ZD851
MTZJ30C
R934
560
560
R933
560
ZD998
MTZJ5.1B
R978
100K
100K
R977
10K
10K
C988
10/50
10/50
D997
1SS133
D996
1SS133
1SS133
GR
98
GR
R990
10 (1/2W)
10 (1/2W)
R992
10
(1/2W)
10
9 10
R976
47
47
R925
56K
56K
Q999
KTC3199 GR
RELAY
DRIVER
C923
0.1
(ML)
0.1
(ML)
C924
0.1
(ML)
0.1
(ML)
C970
47/25
47/25
L902
0.29
µ
H
R974
3.9K
3.9K
R971
22K
22K
L901
0.29
0.29
µ
H
L911
0.29
0.29
µ
H
L912
0.29
0.29
µ
H
C997
47/50
47/50
R998 56K
R926
56K
56K
R973
15K
15K
R972
22K
22K
R929
3.9 (1/2W)
3.9 (1/2W)
C927
0.022(ML)
0.022(ML)
C925
0.022(ML)
0.022(ML)
R930
3.9 (1/2W)
3.9 (1/2W)
C926
0.022(ML)
0.022(ML)
C928
0.022(ML)
0.022(ML)
R931
5.6 (1/2W)
5.6 (1/2W)
C931
0.022(ML)
0.022(ML)
C929
0.022(ML)
0.022(ML)
R932
5.6 (1/2W)
5.6 (1/2W)
C930
0.022(ML)
0.022(ML)
C932
0.022(ML)
0.022(ML)
C933
0.001
(ML)
0.001
(ML)
C934
0.001
(ML)
0.001
(ML)
C998
0.001
0.001
C999
0.001
0.001
R996
47K
47K
R997
3.3K
3.3K
D999
1SS133
1SS133
D912
1SS133
1SS133
D911
1SS133
1SS133
RL901
RELAY
RELAY
SO901
SPEAKER TERMINALS
SPEAKER TERMINALS
Q994
KTA1270 Y
FAN MOTOR
CONTROL
ZD999
MTZJ5.6B
R975
3.9K
3.9K
Q995
KTC3199 GR
4
3
3
2
2
1
1
5
4
3
2
1
2
1
1
M
2
1
1
TION
PROTECTION
FAN MOTOR
CONTROL
CONTROL
D852–D855
1N4004S
1N4004S
–38V
0.22 (ML)
0.22 (ML)
SP DET
6 OHMS
+
+
–
–
HP-R CH
HP-L CH
H/P SW
H/P SW
GND(A)
R-CH
L-CH
T851
POWER TRNSFORMER
POWER TRNSFORMER
AC POWER
SUPPLY CORD
(253)
AC 230V
50Hz
SUPPLY CORD
(253)
AC 230V
50Hz
+B
+B
VOLTAGE REGULATOR
T.F
(267)
(267)
HEADPHONE PWB-A3
POWER SUPPLY PWB-C2
+B
–B
–B
+B
+B
+B
+
–
–B
+B
FW901
5
1
J901
HEADPHONES
HEADPHONES
+B
+B
8.8V
9.3V
0V
8.8V
0V
0V
0V
12.1V
0V
+B
(1/2W)
(1/2W)
0V
0V
V
3.8V
–B
-39.8V
-37.0V
-37.6V
–B
5
1
When Servicing, pay attension as the area enclosed by this line
( ) is directry connected with AC main voltage.
( ) is directry connected with AC main voltage.
CD-C1H/CP-C1H
– 46 –
WAVEFORMS OF CD CIRCUIT
50ms
10.0 V
JP+
10.0 V
JP+
CUE
50ms
10.0 V
JP-
10.0 V
JP-
50ms
0.50 V
JP
0.50 V
JP
50ms
1.00 V
TE
1.00 V
TE
6
7
8
9
0.5ms
10.0 V
JP+
10.0 V
JP+
0.5ms
10.0 V
JP-
10.0 V
JP-
0.5ms
0.50 V
JP
0.50 V
JP
0.5ms
1.00 V
TE
1.00 V
TE
6
7
8
9
REVIEW
50ms
10.0 V
JP+
10.0 V
JP+
50ms
10.0 V
JP-
10.0 V
JP-
50ms
0.50 V
JP
0.50 V
JP
50ms
1.00 V
TE
1.00 V
TE
6
7
8
9
0.5ms
10.0 V
JP+
10.0 V
JP+
0.5ms
10.0 V
JP-
10.0 V
JP-
0.5ms
0.50 V
JP
0.50 V
JP
0.5ms
1.00 V
TE
1.00 V
TE
6
7
8
9
PLAY
20ms
1.00 V
SPO
1.00 V
SPO
NORMAL DISC
TN0=01
TN0=01
20ms
2.00 V
CLV+
2.00 V
CLV+
10
11
PLAY
TCD-712 (140mm)
TN0=01
TN0=01
50ms
1.00 V
SPO
1.00 V
SPO
50ms
2.00 V
CLV+
2.00 V
CLV+
10
11
0.5ms
1.00 V
HF
1.00 V
HF
0.5ms
5.0 V
HFL
5.0 V
HFL
0.5ms
5.0 V
TES
5.0 V
TES
1
2
3
CUE
3
4
5
0.5ms
1.00 V
HF
1.00 V
HF
1
2
3
0.5ms
5.0 V
HFL
5.0 V
HFL
0.5ms
5.0 V
TES
5.0 V
TES
REVIEW
3
4
5
3
5ms
0.50 V
0.50 V
1
5ms
5.0 V
5.0 V
STOP
PLAY
FOCUS
SERCH
2
1
FE
DRF
PLAY
TCD-712
5ms
100mV
SLD
100mV
SLD
1
12
0.5ms
100mV
SLD
100mV
SLD
1
12
CD-C1H/CP-C1H
– 47 –
TROUBLESHOOTING
When the CD does not function
When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
• The CD tray fails to operate.
Check the changer mechanism cam switch (SWB101 to
SWB104) and tray switch (SWB105 to SWB108).
SWB104) and tray switch (SWB105 to SWB108).
Yes
Yes
Check the connection between IC201 and SW.
No
ICheck whether output of pins 3 and 7 of main cam motor
driver IC81 is normal.
driver IC81 is normal.
Check the connection from IC2 to IC81.
No
Yes
Check whether the output of pins 3 and 7 of tray motor
driver IC82 is normal.
driver IC82 is normal.
Yes
Check the motors MOB1 and MOB2.
No
Check the connection from IC2 to IC82.
Check whether state changes to Low when
IC201 pin 96 cam SW1
pin 96 cam SW2
pin 97 cam SW3
IC201 pin 96 cam SW1
pin 96 cam SW2
pin 97 cam SW3
pin 98 cam SW4
is on.
Check whether state changes to Low when
IC201 pin 33 tray SWA
pin 100 tray SWB
pin 1 tray SWC
pin 2 tray SWB
IC201 pin 33 tray SWA
pin 100 tray SWB
pin 1 tray SWC
pin 2 tray SWB
is on.
• The CD function will not work.
Yes
Yes
Check the waveform of SCK, SO (DATA) and SI (COMM).
Check the waveform of IC2 pin 54 (SQOUT), pin 55 (COIN),
and pin 57 (CQCK).
Check the waveform of IC2 pin 54 (SQOUT), pin 55 (COIN),
and pin 57 (CQCK).
Check the CD, DSP, power supply, and 16.93 MHz clock
and reset terminal IC2 pin 57.
and reset terminal IC2 pin 57.
Yes
Yes
If the items mentioned above are OK, check the main
microcomputer IC201.
microcomputer IC201.
Check that the pickup is in the PICKUP IN switch position
of SW702A.
of SW702A.
The CD operating keys don't work
CD-C1H/CP-C1H
– 48 –
• Playback can only be performed when disc is
loaded.
Is HF waveform normal (see the Figure 48-2, Figure48-3.)?
Check the tracking system.
Is the Focus servo active? (Can you hear it working?)
Check the laser diode driver.
Check the area around IC1 pin 16 to pin 21 (focus servo
circuit).
Check the area around IC1 pin 16 to pin 21 (focus servo
circuit).
No
Yes
Yes
Yes
Does the DRF signal of IC1 pin 54 change from "L" to "H"?
No
Yes
Check the spindle system.
If the disc is not turning,
the DRF should not
change to "H".
the DRF should not
change to "H".
No
Yes
Check the periphery of
IC1 pin 41 and pin 42.
IC1 pin 41 and pin 42.
Level is abnormal
Yes
Check the spindle system.
Waveform is unstable.
Figure 48-2
Figure 48-3
• The CD operation keys work.
Check the FOCUS-HF system.
Playback can be performed without a disc.
Does the pickup move up and down two twice?
Yes
No
Focus search OK
Check 4 MHz of IC1 pin 50 (CLK) line and the microcomputer
data of pin 51 (CL), pin 52 (DAT) and pin 53 (CE).
data of pin 51 (CL), pin 52 (DAT) and pin 53 (CE).
Yes
Does the output waveform of IC1 pin 16 (FD) match that
shown in Figure 48-1?
shown in Figure 48-1?
Yes
No
Check the area around IC3 to CNP2.
Figure 48-1
0.5s
0.50 V
IC1 16 FD
0.50 V
IC1 16 FD
2
1
0.5s
0.50 V
IC1 7 TE
0.50 V
IC1 7 TE
HF
1.0V/DIV
0.5
1.0V/DIV
0.5
µ
sec/DIV(DC)
(When playing
back the disc)
back the disc)
3
2
1
1
4
0.5s
1.00 V
IC1 16 FD
1.00 V
IC1 16 FD
0.5s
10.0 V
IC2 13 CLV+
10.0 V
IC2 13 CLV+
0.5s
10.0 V
IC1 54 DRF
10.0 V
IC1 54 DRF
0.5s
2.00 V
IC1 7 TE
2.00 V
IC1 7 TE
Waveform in case
of normal play-back
of normal play-back
Focus search is
performed two times
when play operation
is done without disc.
performed two times
when play operation
is done without disc.
Click on the first or last page to see other CD-C1H (serv.man4) service manuals if exist.