DOWNLOAD Sharp DK-KP95PH (serv.man3) Service Manual ↓ Size: 6.43 MB | Pages: 54 in PDF or view online for FREE

DK-KP95PH

4 – 1

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.

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. 

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-KP95PH

4 – 2

118

117

IC1

IC1

FOP

TRP

Press the Tray1 CD Eject Button without inserting a disc, and try 
starting the playback operation.

2. Does the focus (lens) move up and down ?
    (Waveform drawing Figure 1)

1. Is focus servo activated ?
    (Waveform drawing Figure 2)

2. Is the HF waveform normal ?
    (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 114, 115, 117, 118 (122~129) on IC1.
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.

Yes

Yes

Yes

Yes

No

No

No

No

No

No

118

78

IC1

IC1

FOP

TE

134

IC1

RFOUT

DK-KP95PH

4 – 3

The tracking servo is not activated.
Check the peripheral circuits at pins 114, 115, 117, 118 on IC1 
and FFC1.

If the waveform shown in Figure 4 appears and soon after NO 
DISC appears ?

"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 117 on IC1.

Yes

"Initialization" is not possible.

No

When a disc is loaded, start play operation.

The RF waveform is normal, but the TOC data cannot be read.

Check the PLL waveform. (Figure 6)

Check around pins 141~ 144 on IC1.

Data cannot be read. Check the VCO - PLL (Pin no. 141 ~144) 
on IC1 system.

Press the OPEN/CLOSE switch without inserting a disc, and 
then try starting the play operation. 

1. The turntable rotates a little ?
    (Waveform drawing Figure 5)

Yes

2. The turntable does not rotate.

The spin driver circuit is OK.

Check around pin 114 on IC1, pins 5 and 6 on CNP2.

No

78

134

IC1

IC1

TE

RFOUT

118

114

IC1

IC1

FOP

SPOUT

142

143

IC1

IC1

PLLF

PLLFO

118

IC1

FOP

DK-KP95PH

5 – 1

1

FW_UPD_PRO

Input

CMOS Input / 

Output

FIRMWARE UPDATE PROGRESS

P141/PCLBUZ1/INTP7

2

POWER_KEY

Input

CMOS Input / 

Output

POWER KEY INPUT

P140/PCLBUZ0/INTP6

3

MUTE_CODEC

Output

CMOS Input / 

Output

CODEC MUTE CONTROL
L : OFF , H : ON

P120/ANI19

4

CD_SI

Output

CMOS Input / 

Output

DATA INPUT TO CD DSP

P45/SO01

5

CD_SO

Input

CMOS Input / 

Output

DATA OUTPUT FROM CD DSP

P44/SI01/SDA01

6

CD_SCLK

Output

CMOS Input / 

Output

DATA TRANSMISSION/RECEPTION SYNCHRONOUS 
CLOCK TO CD DSP

P43/SCK01/SCL01

7

RESET_CODEC

Output

CMOS Input / 

Output

CODEC RESET CONTROL
H : NORMAL , L : RESET

P42/TI04/TO04

8

STBY_CODEC

Output

CMOS Input / 

Output

STANDBY CODEC
H : STANDBY , L : NORMAL

P41/TI07/TO07

9

TOOL

-

-

FLASH MEMORY PROGRAMMER/DEBUGGER
INPUT/OUTPUT

P40/TOOL0

10

RESET

-

-

RESET INPUT. ACTIVE "L" CONNECT
TO WRITER RESET LINE DURING FLASH

RESET

11

XCOUT

-

-

32.768kHz CRYSTAL (SUB CLOCK)

P124/XT2/EXCLKS

12

XCIN

-

-

32.768kHz CRYSTAL (SUB CLOCK)

P123/XT1

13

NC

Output

CMOS Input / 

Output

PULL DOWN TO VSS

P137/INTP0

14

NC

Output

CMOS Input / 

Output

PULL DOWN TO VSS

P122/X2/EXCLK

15

NC

Output

CMOS Input / 

Output

PULL DOWN TO VSS

P121/X1

16

REGC

-

-

CAPACITOR (0.47 ~ 1 µF) CONNECT TO VSS

REGC

17

VSS

-

-

VSS

18

VSS

-

-

EVSS0

19

VDD

-

-

VDD

20

VDD

-

-

EVDD0

21

TUN/DAP/CODEC_SCL

Output

Nch

TUNER/DAP/CODEC CLOCK I2C BUS LINE

P60/SCLA0

22

TUN/DAP/CODEC_SDA

Input / Output

Nch

TUNER/DAP/CODEC DATA I2C BUS LINE

P61/SDAA0

23

ERR_CODEC

Output

Nch

CODEC ERROR DETECTION

P62/SCLA1

24

NC

Output

Nch

OPEN

P63/SDAA1

25

RX_IN

Input

CMOS Input / 

Output

REMOCON SENSOR INPUT

P31/TI03/TO03/INTP4

26

ERR_CODEC

Input

CMOS Input / 

Output

CODEC ERROR DETECTION

P64/TI10/TO10