DOWNLOAD Sharp QT-CD250 (serv.man6) Service Manual ↓ Size: 1.92 MB | Pages: 40 in PDF or view online for FREE

– 17 –

F 3 8 9 5 A F

C651

C654

D651

D654

C653

D652

D653

C652

F651

T1.25A  L 250V

BR

SW651

VOLTAGE SELECTOR

AC220V-240V        AC110V-127V

QT-CD250W ONLY

BL

RD

OR

(241)

(241)

(241)

CNS602

FM ROD ANTENNA(237)

BK

BK

RD

WH

RECORD/PLAYBACK

HEAD(240-4)

ERASE HEAD

(240-5)

TAPE

BK

CNS101

BK

WH

RD
BK

1
2
3
4

B R

COLOR  TABLE

R D ( R )

O R

Y L

G R

B L

V L

G Y

W H ( W )

B K

P K

BROWN

RED

ORANGE

YELLOW

GREEN

BLUE

VIOLET

GRAY

WHITE

BLACK

PINK

T651

POWER

TRANSFORMER

(229)

(230)

BATTERYS
DC9 V [ "D" size(UM/SUM-1,
R20 or HP2) battery x 6 ]

BR

M601

TAPE MOTOR

(240-6)

SW601

TAPE MAIN

(240-7)

1

+

+

-

SW702
PICKUP IN

M702
SPENDLE MOTOR

M701
SLED MOTOR

CNP803

1

2

3

4
5
6

5 4 3 2 1

7

8

6 5 4 3 2 1

PICK UP UNIT

CD MOTOR PWB-B

POWER PWB-A3

TERMINAL B  PWB-A6

TERMINAL A  PWB-A5

OR

RD

OR

GY

RD

RD

YL

YL

RD

BL

BR[QT-CD250W]

OR

SO651

AC INPUT

SOCKET

2

3

-

(233)

1
2
3
4
5
6

BK
GY
GY
GY
GY
GY

CNS803

BATTERYS

DC4.5V ["AA" SIZE(UM/SUM-3,

R6 or HP7)battery x 3]

QT-CD250H
For U.K./Europe/
Australia/
New Zealand; 
AC230-240V,50Hz
For Philippines; 
AC220V,60Hz

QT-CD250W
AC110-127V/
AC220-240V,
50/60Hz
 

For 
QT-CD250H

BR[QT-CD250W]

RD[QT-CD250H]

RD[QT-CD250H]

– 18 –

  1. Tuner

(  ): AM mode
Marking except for (  ): FM mode

2. CD

(  ): Play mode
Marking except for (  ): Stop state

3. Deck section

(  ): Record mode
Marking except for (  ): Playback mode
Display / Control section:
(  ): Active state
Marking except for (  ): CD Function mode at stop state

• Schematic diagram and Wiring Side of P.W.Board for this

model are subject to change for improvement without prior
notice.

• Parts marked with “      ” (

          ) are important for

maintaining   the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.

• Resistor:

To differentiate the units of resistors, the symbol as K and M
are used: the symbol K means 1000 ohm and the symbol M
means 1000 kohm and the resistor without any symbol is an
ohm resistor. The resistor designated "Fusible" is a fuse type
resistor

• Capacitor:

To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the capacitor
without such a symbol is microfarad. As to electrolytic capacitor,
the expression “capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type

• The indicated voltage in each section is the one measured by

Digital Multimeter between such a section and the chassis
with no signal given.

SW102

RECODE/PLAYBACK

REC—P.B.

SW201

FUNCTION SELECTOR

TAPE/OFF—
TUNER/ON—CD/ON

SW601

TAPE MAIN

OFF—ON

SW651

VOLTAGE SELECTOR

AC220-240V—

(QT-CD250W ONLY)

AC110-127V

SW702

PICKUP IN

OFF—ON

SW801

PLAY/PAUSE/

OFF—ON

TUNING UP

SW802

STOP/TUNING DOWN

OFF—ON

SW803

REPEAT/BAND

OFF—ON

SW804

TUNER/MEMORY

OFF—ON

SW805

CUE/PRESET UP

OFF—ON

SW806

REVIEW/

OFF—ON

PRESET DOWN

SW807

VOLUME UP

OFF—ON

SW808

VOLUME DOWN

OFF—ON

SW809

X-BASS

OFF—ON

SW810

CD LID

OFF—ON

E C B

(S) (G) (D)

(1) (2) (3)

FRONT

VIEW

KRA102 M
KRC107 M
KTA1046 Y
KTA1266 GR
KTA1273 Y
KTC3199 GR

– 19 –

NO DISC FOCUS SEARCH 

STOP    PLAY

FOO

1

TMAX

1

 

FO+

2

SBOK

2

FO-

3

DMO

3

FOCUS SEARCH    TOC IL

STOP    PLAY

SEL

1

TEI

1

 

FEI

2

TRO

2

TEI

3

FMO

3

STOP    PLAY

CUE

FEI

1

TEI

1

 

SBAD

2

TRO

2

RFO

3

FMO

3

STOP    PLAY

REVIEW

FEI

1

TEI

1

 

RFGO

2

TRO

2

RFRP

3

FMO

3

STOP    PLAY

TCD-782 TNO-02 PLAYBACK

TEI

1

LO

1

TRO

2

RO

2

SBAD

3

1

2

3

4

6

7

11

15

16

17

5

6

5

7

8

5

9

10

6

11

12

13

14

6

11

15

6

11

15

IC802 66pin

IC803 20pin

IC802 45pin

IC803 21pin

IC802 72pin

IC802 74pin

IC802 62pin

IC802 67pin

IC802 64pin

IC802 71pin

IC802 62pin

IC802 63pin

IC802 67pin

IC801 22pin

IC802 71pin

IC802 62pin

IC801 19pin

IC802 67pin

IC801 17pin

IC802 71pin

IC802 64pin

IC802 67pin

IC802 63pin

IC802 86pin

IC802 64pin

IC802 64pin

IC802 64pin

IC802 50pin

IC802 82pin

– 20 –

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.

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 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 player or on computer CD ROM drives.
All rights reserved. Unauthorized duplicating, broadcasting and renting product is prohibited by law.

Cleaning Disc
PARTS CODE:
    UDSKA0004AFZZ

Cleaner Liquid

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."

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.

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.

Check the pickup-in switch (SW702) position.

Check the Focus system.

Yes

The CD operating keys don't work.

Check the  power supply, 16.93 MHz clock, and reset terminal.

Yes

Yes