Sharp DK-KP85H (serv.man2) Service Manual ▷ View online
DK-KP85PH
3 – 2
Figure 5
Figure 6
Figure 7
Figure 9
Figure 8
CAUTION:
TO REMOVE SPEAKER UNIT, PRESS THESE LOCKING TABS
TO RELEASE SPEAKER WIRES.
TO RELEASE SPEAKER WIRES.
SPEAKER UNIT
LOCKING
TAB
LOCKING TAB
SPEAKER
WIRE
Front Panel Ass’y
Front Panel Ass’y
Front Panel Ass’y
CD Mechanism Ass’y
Woofer
Woofer
LED PWB
Woofer
Woofer
(C3) x 1
(C3) x 1
(H2) x 1
(A5) x 1
(A4) x 2
(A6) x 2
(A6) x 2
(J2) x 4
(J1) x 1
Transit PWB
Switch PWB
(C4) x 1
(C2) x 1
(B5) x 2
(G1) x 2
M2.6 x 8mm
M2.6 x 8mm
(G1) x 3
M2.6 x 8mm
M2.6 x 8mm
(M1) x 4
M3 x 8mm
M3 x 8mm
(H1) x 4
M3 x 6mm
M3 x 6mm
(K1) x 2
M2.6 x 8mm
M2.6 x 8mm
SMPS PWB
Bottom Cover
(M1) x 4
M3 x 8mm
M3 x 8mm
(L1) x 6
M3 x 8mm
M3 x 8mm
(L2) x 1
M3 x 20mm
M3 x 20mm
Gear Holder
(L3) x 1
(L3) x 1
(L4) x 2
M2.6 x 8mm
M2.6 x 8mm
PRESS
Back Cabinet
Main PWB
Key PWB
DK-KP85PH
4 – 1
CHAPTER 4. FLOWCHART
[1] Troubleshooting
1. When the CD does not function
The CD section may not operate when the objective lens of the optical pickup is dirty. 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.
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."
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.
2. When a CD cannot be played
2.1. Pressing the CD operation key is accepted, but playback does not occur.
1) Focus-HF system check
2) Tracking system check
3) Spin system check
4) PLL system check
Parts code
1.
CD optical pickup Lens cleaner disc
UDSKA0004AFZZ
HOW TO USE
CAUTION
Cleaning fluid
Cleaner disc
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.
Place the CD cleaner disc onto the CD disc tray with the brush side down, then
press the play button.
You will hear music for about 20 seconds and the CD player will automatically stop.
If it still play continuously, press the stop button.
1.
2.
3.
The CD lens cleaner should be effective for 30-50 operations, however if the
brushes become worn out earlier 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 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.
DK-KP85PH
4 – 2
(1) Focus-HF system check.
Press the Open / Close switch without inserting a disc, and try
starting the playback operation.
starting the playback operation.
2. Does the focus (lens) move up and down ?
(Waveform drawing Figure 1)
(Waveform drawing Figure 1)
1. Is focus servo activated ?
(Waveform drawing Figure 2)
(Waveform drawing Figure 2)
2. Is the HF waveform normal ?
(Waveform drawing Figure 3)
(Waveform drawing Figure 3)
1. Does the pickup move to the PICKUP-IN Switch position ?
Sled motor.
Check the focus peripheral circuit.
Check the laser diode driver Q5 peripheral circuit.
Spindle motor.
If the level is not normal.
Pins 16, 15, 14, 13 (2, 3, 6, 7, 8, 9) on IC1.
Check the laser diode driver Q5 peripheral circuit.
Check the laser diode driver Q5 peripheral circuit.
3. Is the laser lit ?
4. Is the turntable rotating ?
When a disc is loaded, start playback operation.
Although a CD is inserted and the CD door is
closed, "NO DISC" is displayed.
closed, "NO DISC" is displayed.
Yes
Yes
Yes
Yes
No
No
No
No
No
No
13
IC1
1
FDOUT
TDOUT
14
IC1
2
Figure 1
FDOUT
ANA_MONI1 (TE)
13
IC1
1
62
IC1
4
Figure 2
63
IC1
7
FRI (RFOUT)
Figure 3
DK-KP85PH
4 – 3
The tracking servo is not activated.
Check the peripheral circuits at pins 16, 15, 14, 13 on IC1 and
CNP1.
Check the peripheral circuits at pins 16, 15, 14, 13 on IC1 and
CNP1.
(2) Tracking system check.
If the waveform shown in Figure 4 appears and soon after NO
DISC appears ?
DISC appears ?
Check the TE waveform at pin 62 on IC1.
"Initialization" is possible, but play is not possible ?
No
Yes
A normal jump operation cannot be completed or the begining of
the track cannot be found.
Check the around pin 14 on IC1.
the track cannot be found.
Check the around pin 14 on IC1.
Yes
(3) Spin system check.
Press the OPEN/CLOSE switch without inserting a disc, and
then try starting the play operation.
then try starting the play operation.
1. The turntable rotates a little ?
(Waveform drawing Figure 5)
(Waveform drawing Figure 5)
Yes
2. The turntable does not rotate.
The spin driver circuit is OK.
Check around pin 16 on IC1, pins 5 and 6 on CNP2.
No
62
IC1
4
ANA_MONI1 (TE)
63
IC1
7
FRI (RFOUT)
Figure 4
Figure 5
13
IC1
1
FDO
16
IC1
3
SPDO
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