Read Sharp CD-C611H (serv.man5) Service Manual online
CD-C607H/611H
– 35 –
WAVEFORMS OF CD CIRCUIT
1
2
3
REVIEW
0.5ms
1.00 V
IC1 41 HF
1.00 V
IC1 41 HF
0.5ms
5.0 V
IC1 37 HFL
5.0 V
IC1 37 HFL
1
3
1
4
0.5ms
5.0 V
IC1 36 TES
5.0 V
IC1 36 TES
1
5
CUE
50ms
10.0 V
IC1 33 JP+
10.0 V
IC1 33 JP+
50ms
10.0 V
IC1 32 JP-
10.0 V
IC1 32 JP-
1
6
1
7
50ms
0.50 V
IC1 14 JP
0.50 V
IC1 14 JP
1
8
50ms
1.00 V
IC1 7 TE
1.00 V
IC1 7 TE
1
9
0.5ms
10.0 V
IC1 33 JP+
0.5ms
10.0 V
IC1 32 JP-
10.0 V
IC1 33 JP+
0.5ms
10.0 V
IC1 32 JP-
1
6
1
7
0.5ms
0.50 V
IC1 14 JP
0.50 V
IC1 14 JP
1
8
0.5ms
1.00 V
IC1 7 TE
1.00 V
IC1 7 TE
1
9
REVIEW
50ms
10.0 V
IC1 33 JP+
50ms
10.0 V
IC1 32 JP-
10.0 V
IC1 33 JP+
50ms
10.0 V
IC1 32 JP-
1
6
1
7
50ms
0.50 V
IC1 14 JP
0.50 V
IC1 14 JP
1
8
50ms
1.00 V
IC1 7 TE
1.00 V
IC1 7 TE
1
9
0.5ms
10.0 V
IC1 33 JP+
10.0 V
IC1 33 JP+
0.5ms
10.0 V
IC1 32 JP-
10.0 V
IC1 32 JP-
1
6
1
7
0.5ms
0.50 V
IC1 14 JP
0.50 V
IC1 14 JP
1
8
0.5ms
1.00 V
IC1 7 TE
1.00 V
IC1 7 TE
1
9
PLAY
NORMAL DISC
TN0=01
TN0=01
20ms
1.00 V
IC1 27 SPO
1.00 V
IC1 27 SPO
20ms
2.00 V
IC2 12 CLV+
2.00 V
IC2 12 CLV+
1
10
1
11
PLAY TCD-712 (140mm)
TN0=01
50ms
1.00 V
IC1 27 SPO
1.00 V
IC1 27 SPO
50ms
2.00 V
IC2 12 CLV+
2.00 V
IC2 12 CLV+
1
10
1
11
PLAY
TCD-712
1
5s
100mV
IC1 29 SLD
100mV
IC1 29 SLD
1
12
1
0.5s
100mV
IC1 29 SLD
100mV
IC1 29 SLD
1
12
3
5ms
0.50 V
IC1 20 FE
0.50 V
IC1 20 FE
1
5ms
5.0 V
IC1 54 DRF
5.0 V
IC1 54 DRF
STOP
PLAY
FOCUS
SERCH
1
1
1
2
1
2
3
CUE
0.5ms
1.00 V
IC1 41 HF
1.00 V
IC1 41 HF
0.5ms
5.0 V
IC1 37 HFL
5.0 V
IC1 37 HFL
1
3
1
4
0.5ms
5.0 V
IC1 36 TES
5.0 V
IC1 36 TES
1
5
CD-C607H/611H
– 36 –
TROUBLESHOOTING
• When the turntable fails to stop.
Is from
5 V till 2.5V down pulse (approx. 300 ms)
Check the SW2 and the wiring from the IC701 pin 42 to the
SW2.
No
input into the IC701 pin 42 when the turntable is rotating?
5V
2.5V
Yes
Check IC2 pin26 Q51 and the periphery.
Check the MECHA UP switch and the wiring from the IC701
pin 42 to the MECHA UP switch.
pin 42 to the MECHA UP switch.
No
Is there following voltage input on the IC701 pin 42 in the
specific state?
When the CD mechanism is moved up: 0V
specific state?
When the CD mechanism is moved up: 0V
In other states: 4.3V
Yes
IC701 defective.
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.
Dust gradually accumulates on the objective lens during use, and it may degrade performance. To avoid this problem, use a
cleaning disc designed for CD optical pickup lenses.
cleaning disc designed for CD optical pickup lenses.
0V
HOW TO USE
1. Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the brush on the CD cleaner disc which has
1. Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the brush on the CD cleaner disc which has
the
mark next to it.
2. Place the CD cleaner disc onto the CD disc tray with the brush side down, then press the play button.
3. You will hear music for about 20 seconds and the CD player will automatically stop. If it continues to turn, press the stop
button.
CAUTION
3. You will hear music for about 20 seconds and the CD player will automatically stop. If it continues to turn, press the stop
button.
CAUTION
The CD lens cleaner should be effective for 30~50 operations, however if the brushes become worn out earller then please
replace the cleaner disc.
If the CD cleaner brushes become very wet then wipe off any excess fluid with a soft cloth.
Do not drink the cleaner fluid or allow it to come in contact with the eyes. In the event of this happening then drink and /
or rinse with clean water and seek medical advice.
The CD cleaner disc must not be used on car CD players or on computer CD ROM drives.
All rights reserved. Unauthorized duplicating, broadcasting and renting this product is prohibited by law.
Cleaner Liquid
Cleaning Disc
PARTS CODE: UDSKA0004AFZZ
PARTS CODE: UDSKA0004AFZZ
Yes
CD-C607H/611H
– 37 –
• When the CD tray fails to open or close.
Is there following voltage input in specific state of IC701 pin 37?
Open state: 0V
Close state: 0V
Intermediate state between open state and close state: 4.3V
Intermediate state between open state and close state: 4.3V
Is H output to IC2 pin 24 or 25 for 7 seconds when the OPEN/
CLOSE button is pressed? IC3 is defective. Replace it.
CLOSE button is pressed? IC3 is defective. Replace it.
Is 4V output between IC3 pins 38 and 39 during operation
stated above?
stated above?
Check the loading motor (M3) and the loading mechanism.
Yes
Yes
Yes
No
No
IC2 defective.
No
Check the periphery of IC3.
IC3 defective.
OK
OK
Check the OPEN/CLOSE switch and the wiring from the
IC701 pin 37 to the OPEN/CLOSE switch.
IC701 pin 37 to the OPEN/CLOSE switch.
Check the wiring of the IC2 pins 24 and 25, IC3 pins 38 and 39.
• The CD function will not work.
The CD operating buttons don't work.
Check the CD, DSP, power supply, and 16.93 MHz clock, and
reset terminal.
reset terminal.
Check the waveform of SCK, SO (DATA) and SI (COMM).
Yes
Yes
See if the pick-up is in the PICKUP IN switch position.
If the items mentioned above are OK, check the main
microcomputer IC701.
microcomputer IC701.
Yes
Yes
No
Is there following voltage input on the IC701 pin 42 in the
specific state?
specific state?
In other states: 4.3V
When the CD mechanism is moved up: 0V
• When turntable fails to move.
Check the MECHA UP switch and the wiring from the IC701
pin 42 to the MECHA UP switch.
pin 42 to the MECHA UP switch.
Is 4V output from the Q51 emitter during operation stated
above?
above?
Yes
Yes
Check the wiring of IC2 pin 27 and Q51 pin 2.
OK
No
No
Is L output from the IC2 pin 27 during SEC when the disc skip
switch is pressed?
switch is pressed?
Yes
Check turntable motor and turntable mechanism.
Check Q51 and the periphery.
IC2 defective.
CD-C607H/611H
– 38 –
• Playback can only be performed when a disc is
loaded.
Is HF waveform normal (see the Fig. 38-2, Fig. 38-3)?
Check the tracking system.
Is the Focus servo active? (Can you hear it working?)
Check the laser diode driver.
Check the area around IC1(16) - (21) (focus servo circuit).
Check the area around IC1(16) - (21) (focus servo circuit).
No
Yes
Yes
Yes
Does the DRF signal change from "L" to "H"?
No
Yes
If the disc is not turning, the DRF
should not change to "H".
should not change to "H".
Level is abnormal.
No
Yes
Waveform is unstable.
Check the spin system.
Yes
Check the periphery
of IC1 pins 41 and 42.
of IC1 pins 41 and 42.
Check the spin system.
Figure 38-3
Figure 38-2
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 12 CLV+
10.0 V
IC2 12 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
playback
case of normal
playback
No
Yes
No
• The CD operating keys work.
Check the Focus - HF system.
Playback can be performed without a disc.
Focus search OK
Does the pick-up move up and down twice?
Does the output waveform of IC1(16)(FD) match that shown in
Fig. 38-1?
Fig. 38-1?
Check the IC1(50)(CLK) line, 4MHz.
Check the microcomputer data on pins (51)(CL), (52)(DAT)
and (53)CE.
Check the microcomputer data on pins (51)(CL), (52)(DAT)
and (53)CE.
Check the area around IC3-CNP2.
Yes
Yes
Figure 38-1
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
Focus search is
performed two
times when play
operation is done
without disc.
performed two
times when play
operation is done
without disc.
∝
HF
1.0V/DIV
0.5 sec/DIV(DC)
(When playing
back the disc)
1.0V/DIV
0.5 sec/DIV(DC)
(When playing
back the disc)