Sharp CDBK-300-W Service manual

CD-BK300W

SERVICE MANUAL

No. S5133CDBK300W

MINI COMPONENT SYSTEM

MODEL CD-BK300W

CD-BK300W Mini Component System consisting of
CD-BK300W (main unit) and CP-BK300 (speaker system).

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

CONTENTS

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2

VOLTAGE SELECTION..................................................................................................................................................... 2

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................. 3

SPECIFICATIONS ............................................................................................................................................................. 3

NAMES OF PARTS ........................................................................................................................................................... 4

OPERATION MANUAL ...................................................................................................................................................... 6

DISASSEMBLY.................................................................................................................................................................. 9

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12

ADJUSTMENT ................................................................................................................................................................. 13

BLOCK DIAGRAM ........................................................................................................................................................... 17

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................20

VOLTAGE ........................................................................................................................................................................ 38

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 39

TYPES OF TRANSISTOR AND LED................................................................................................................................39

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 40

TROUBLESHOOTING ..................................................................................................................................................... 41

FUNCTION TABLE OF IC................................................................................................................................................ 45

FL DISPLAY......................................................................................................................................................................53

REPLACEMENT PARTS LIST/EXPLODED VIEW

SHARP CORPORATION

– 1 –

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-BK300W

SAFETY PRECAUTION FOR SERVICE MANUAL

WARNINGS

THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES
AGAINST EXPOSURE TO THE LASER BEAM.

1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITHOUT A COMPACT DISC IN POSITION AND THE

PICKUP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICKUP LENS.

2-THE LASER POWER OUTPUT OF THE PICKUP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY

PRESET BEFORE SHIPMENT.

DO NOT ATTEMPT TO READJUST THE LASER PICKUP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICKUP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.

VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT
INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.

VOLTAGE SELECTION

Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage
as follows.
Turn the selector with a screwdriver until the appropriate voltage number appears in the window (110 V, 127 V, 220 V or 230 V-240 V AC).

– 2 –

QACCA0003AW00

CD-BK300W

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QACCL0005AW00

QACCB0011AW00

QACCE0010AW00

QACCJ0007AW00

CD-BK300W

General

Power source
Power consumption
Dimensions

Weight

Amplifier

Output power

Output terminals

Input terminals

QACCZ0007AW00

QPLGA0003AWZZ

QPLGA0004AWZZ

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.

SPECIFICATIONS

CD player

3-disc multi-play compact disc player
Non-contact, 3-beam semiconductor laser pickup
1-bit D/A converter
20 - 20,000 Hz
90 dB (1 kHz)

FM: 88 - 108 MHz
AM: 531 - 1,602 kHz

50 - 14,000 Hz (Normal tape)
55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/playback)

0.3 % (WRMS)

3-way type speaker system
5 cm (2") Tweeter
13 cm (5-1/4") Woofer
16 cm (6-1/2") Subwoofer
250 W

125 W

6 ohms
Width: 287 mm (11-5/16")

Height: 330 mm (13")
Depth: 281 mm (11-1/16")

5.0 kg (11.1 lbs.)/each

AC 110/127/220/230 - 240 V, 50/60 Hz
210 W
Width: 270 mm (10-11/16")

Height: 330 mm (13")
Depth: 372 mm (14-11/16")

8.7 kg (19.2 lbs.)

MPO: 480 W (240 W + 240 W) (10 % T.H.D.)
Main speaker (woofer and tweeter): 200 W (100 W + 100 W)
Subwoofer: 280 W (140 W + 140 W)
RMS: 250 W (125 W + 125 W) (10 % T.H.D.)
Main speaker (woofer and tweeter): 100 W (50 W + 50 W)
Subwoofer: 150 W (75 W + 75 W)
RMS: 188 W (94 W + 94 W) (0.9 % T.H.D.)
Main speaker (woofer and tweeter): 72 W (36 W + 36 W)
Subwoofer: 116 W (58 W + 58 W)
Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Video/Auxiliary (audio signal): 500 mV/47 kohms
Microphone: 1 mV/600 ohms

Type
Signal readout
D/A converter
Frequency response
Dynamic range

Tuner

Frequency range

Cassette deck

Frequency response
Signal/noise ratio

Wow and flutter

CP-BK300

Type

Maximum input power
(Total)

Rated input power
(Total)

Impedance
Dimensions

Weight

Specifications for this model are subject to change without
prior notice.

– 3 –

CD-BK300W

NAMES OF PARTS

CD-BK300W

Front panel

1. Disc Tray

2. Timer Set Indicator

3. On/Stand-by Button

4. Tape 2 Cassette Compartment

5. Tape 1 Cassette Compartment

6. Equalizer Mode Select Button

7. Volume Control

8. Extra Bass/Demo Mode Button

9. Disc Tray Open/Close Button

10. Disc Number Select Button (with Indicator)

11. Disc Skip Button

12. Tuning and Time Up Button

13. Tape 2 Reverse Play Button (with Indicator)

14. CD Button

15. Tuner (Band) Button

16. Tape (1 2) Button

17. Video/Auxiliary Button

18. Dimmer Button

19. Clock Button

20. Timer/Sleep Button

21. Headphone Socket

22. CD or Tape Stop Button (with Indicator)

23. CD Play, Tape 1 Play or Tape 2 Forward Play Button
(with Indicator)

24. Tape 2 Reverse Mode Select Button

25. CD Track Up or Fast Forward, Tape 2 Fast Wind,

Tuner Preset Up Button

26. Tuning and Time Down Button

27. Memory/Set Button

28. Tape 2 Record Pause Button

29. CD Track Down or Fast Reverse, Tape 2 Fast Wind,
Tuner Preset Down Button

30. Microphone Level Control

31. Microphone Socket

1
2

3

18
19

20
21

678

171615141312

9
10

11

4
5

22
23
24
25

Display

1. Extra Bass Indicator

2. FM Stereo Mode Indicator

3. FM Stereo Receiving Indicator

4. Karaoke Mode Indicator

5. CD Repeat Play Indicator

6. CD Pause Indicator

7. CD Play Indicator

8. Tape 2 Record Indicator

9. Tape Reverse Mode Indicator

10. Disc Number Indicators

11. Timer Play Indicator

12. Memory Indicator

13. Tape 2 Reverse Play Indicator

14. Tape 1 Play or Tape 2 Forward Play Indicator

15. Sleep Indicator

16. Timer Recording Indicator

17. Spectrum Analyzer/Volume Level Indicator

1
2

34 6

26 27 28

5

7

17

17 17

30 3129

8
9

13 14 15 16

10
11

12

– 4 –

CD-BK300W

Rear panel

CD-BK300W

1. FM 75 Ohms Aerial Terminal

2. FM Aerial Earth Terminal

3. AM Loop Aerial Socket

4. Span Selector Switch

5. Video/Auxiliary (Audio Signal) Input Sockets

6. Speaker Terminals

7. AC Power Lead

8. AC Voltage Selector

Remote control

1. Remote Control Transmitter

2. Echo Level Up and Down Butto

3. Karaoke Mode Button

4. Disc Number Select Buttons

5. CD Clear Button

6. Tape 2 Record Pause Button

7. CD Track Down or Fast Reverse, Tape 2 Fast Wind,

Tuner Preset Down Button

8. Equalizer Mode Select Button

9. Tape 2 Reverse Play Button

10. CD Button

11. Tuner (Band) Button

12. On/Stand-by Button

13. Extra Bass Button

14. CD Random Button

15. CD Memory Button

16. CD Pause Button

17. CD Track Up or Fast Forward, Tape 2 Fast Wind,

Tuner Preset Up Button

18. CD or Tape Stop Button

19. CD Play or Repeat, Tape 1 Play,

Tape 2 Forward Play Button

20. Video/Auxiliary Button

21. Tape (1

22. Volume Up and Down Buttons

2) Button

1

2
3

4
5

6
7

8

9
10
11

12

1
2
3
4
5
6

8

7

14
15

16
17
18

19
20

21
22

13

Buttons with " " mark in the illustration can be operated on the remote control
only.

Other buttons can be operated both on the main unit and the remote control.

– 5 –

CD-BK300W

CP-BK300

1. Subwoofer

2. Bass Reflex Duct

3. Tweeter

4. Woofer

5. Speaker wire for SUBWOOFER terminals

6. Speaker wire for MAIN terminals

3

1
2

4

5
6

OPERATION MANUAL

System Connections

Setting the AC voltage selector

Check the setting of the AC voltage selector located on the rear panel before plug­ging the unit into an AC socket. If necessary, adjust the selector to correspond to the
AC power voltage used in your area.

Turn the selector with a screwdriver until the appropriate voltage num­ber appears in the window (110 V, 127 V, 220 V or 230 V - 240 V AC).

Connecting the AC power lead

After making all connections, plug the unit. If you plug the unit first,
the unit will enter the demonstration mode.

Note:

Unplug the AC power lead from the AC socket if the unit will not be in use for a pro­longed period of time.

AC Plug Adaptor

In areas (or countries) where an AC socket as shown in illustration is used, con­nect the unit using the AC plug adaptor supplied with the unit, as illustrated. The AC
plug adaptor is not included in areas where the AC wall socket and AC power plug
can be directly connected (see illustration ).

Setting the FM/AM span selector

1

2

The International Telecommunication Union (ITU) has established that member coun­tries should maintain either a 100 kHz or a 50 kHz interval between broadcasting fre­quencies of FM stations and 10 kHz or 9 kHz for AM station. The illustration shows
the 50/9 kHz zones (regions 1 and 3), and the 100/10 kHz zone (region 2).
Before using the unit, set the SPAN SELECTOR switch (on the rear panel) to the
interval (span) of your area.

To change the tuning zone:

1 Press the ON/STAND-BY button to enter the stand-by mode.
2 Set the SPAN SELECTOR switch (on the rear panel) as follows.

For 50 kHz FM interval (9 kHz in AM) 50/9
For 100 kHz FM interval (10 kHz in AM) 100/10

3 Whilst pressing down the button and the X-BASS/DEMO button, press the ON/

STAND-BY button until "CLEAR AL" appears.

Caution:

This operation will erase all data stored in memory including clock, timer settings,
tuner preset, and CD programme.

– 6 –

Setting the Clock

In this example, the clock is set for the 24-hour (0:00) display.

1

Press the ON/STAND-BY button to turn the power on.

2

Press the CLOCK button and within 5 seconds, press the MEMO­RY/SET button.

3

Press the TUNING/TIME ( or ) button to select 24-hour or 12­hour display and then press the MEMORY/SET button.

CD-BK300W

4

Press the TUNING/TIME ( or ) button to adjust the hour and then
press the MEMORY/SET button.

Press the TUNING/TIME ( or ) button once to advance the time by 1 hour.
Hold it down to advance continuously.

When the 12-hour display is selected, "AM" will change automatically to "PM".

5

Press the TUNING/TIME ( or ) button to adjust the minutes and
then press the MEMORY/SET button.

Press the TUNING/TIME ( or ) button once to advance the time by 1
minute. Hold it down to change the time in 5-minute intervals.

The hour will not advance even if minutes advance from "59" to "00".
The clock begins counting from "0" seconds. (Seconds are not displayed.)

The time display will disappear after a few seconds.

To confirm the time display:

Press the CLOCK button.
The time display will appear for about 5 seconds.

"0:00" The 24-hour display will appear.

"AM 12:00" The 12-hour display will appear.
(AM 12:00 - PM 11:59)
"AM 0:00" The 12-hour display will appear.
(AM 0:00 - PM 11:59)
Note that this can only be set when the unit is first installed or it has been reset.

(Refer to step 3 under "If trouble occurs".)

(0:00 - 23:59)

Remote Control

Test of the remote control

Face the remote control directly to the remote sensor on the unit.

The remote control can be used within the range shown below:

Press the ON/STAND-BY button. Does the power turn on? Now, you can enjoy the
music.

Remote sensor

Note:

The "CLOCK" or time will flash at the push of the CLOCK button when the AC power
supply is restored after a power failure or unplugging the unit.
Readjust the clock as follows.

To readjust the clock:

Perform "Setting the Clock" from the beginning. If the time display is flashing, step 3
(for selecting the 24-hour or 12-hour display) will be skipped.

To change the 24-hour or 12-hour display:

1 Clear all the programmed contents. [Perform to step 3 under "If trouble occurs" on.]
2 Perform "Setting the Clock" from the beginning.

0.2 m - 6 m
(8" - 20')

– 7 –

CD-BK300W

Troubleshooting Chart

Many potential "problems" can be resolved by the owner without calling a service
technician.
If something is wrong with this product, check the following before calling your autho­rised SHARP dealer or service centre.

General

The clock is not on time. Did a power failure occur? Reset the

When a button is pressed, the unit
does not respond.

No sound is heard. Is the volume level set to "0"?

Symptom Possible cause

clock.
Set this unit to the power stand-by mode

and then turn it back on.
If the unit still malfunctions, reset it. (Refer

to step3 under "If trouble occurs"

Are the headphones connected?
Are the speaker wires disconnected?
Is the karaoke mode set to "L-CH", "R-CH"

or "V-CANCEL"?

CD player

Playback does not start. Is the disc loaded upside down?
Playback stops in the middle or is

not performed properly.
Playback sounds are skipped, or

stopped in the middle of a track.

Symptom Possible cause

Does the disc satisfy the standards?
Is the disc distorted or scratched?
Is the unit located near excessive vibra-

tions?
Is the disc very dirty?
Has condensation formed inside the unit?

Tuner

Radio makes unusual noise con­secutively.

Symptom Possible cause

Is the unit placed near the TV or comput­er?

Is the FM aerial or AM loop aerial placed
properly? Move the AC power lead away
from the aerial if located near.

Cassette deck

Cannot record. Is the erase-prevention tab removed?
Cannot record tracks with proper

sound quality.
Cannot erase completely.
Sound skipping. Is there any slack?

Cannot hear treble. Are the capstans, pinch rollers, or heads
Sound fluctuation.
Cannot remove the tape. If a power failure occurs during playback,

Symptom Possible cause

Is it a normal tape? (You cannot record on
a metal or CrO tape.)

Is the tape stretched?

dirty?

the heads remain engaged with the tape.
Do not open the compartment forcibly.
Wait until electricity resumes.

Karaoke

The vocal part of a multiplexed
disc is not heard.

Symptom Possible cause

Is the karaoke mode set to "L-CH", "R-CH"
or "V-CANCEL"?

Remote control

The remote control does not oper­ate.

Symptom Possible cause

Is the AC power lead of the unit plugged
in?

Is the battery polarity respected?
Are the batteries dead?
Is the distance or angle incorrect?
Does the remote control sensor receive

strong light?

Troubleshooting Chart

If trouble occurs

When this product is subjected to strong external interference (mechanical shock,
excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is
operated incorrectly, it may malfunction.

If such a problem occurs, do the following:
1 Set the unit to the stand-by mode and turn the power on again.

2 If the unit is not restored in step 1, unplug and plug in the unit, and then turn

the power on.

3 If neither step 1 nor 2 restores the unit, do the following:

Press the ON/STAND-BY button to enter the power stand-by mode.
Whilst pressing down the button and the X-BASS/DEMO button, press the
ON/STAND-BY button until "CLEAR AL" appears.

Caution:

This operation will erase all data stored in memory including clock, timer settings,
tuner preset, and CD programme.

Before transporting the unit

1 Press the ON/STAND-BY button to turn the power on.
2 Press the CD button.
3 Press the OPEN/CLOSE button to open the disc tray.

Remove all CDs inserted in the unit.

4 Press the OPEN/CLOSE button to close the disc tray.

Make sure that "NO DISC" is displayed.

5 Press the ON/STAND-BY button to enter the stand-by mode, and then unplug

the AC power lead from the AC socket.

– 8 –

DISASSEMBLY

Caution on Disassembly

Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.

4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.

CD-BK300W

STEP

10
11

12 Turntable 1. Hook........................ (M1) x2 10-5

13 Disc Tray 1.

14 CD Servo PWB 1. Screw ....................... (P1) x1 11-1

15 CD Mechanism 1. Hook.........................(Q1) x2 11-2

Note 1: How to open the changer manually. (Fig. 9-3)

1. In this state, turn fully the lock lever in the arrow direction through

2.

3. After that, push forward the slide Chissis.

REMOVAL

1 Top Cabinet 1. Screw ....................... (A1) x4 9-1

2 Side Panel 1. Screw ....................... (B1) x8 9-1

(Left/Right)

3 CD Player Unit/ 1. Turn on the power supply,... 9-2

CD Tray Cover open the disc tray, take out

4 Rear Panel with 1. Screw .......................(D1) x9 9-2

Fan Motor 2. Socket ......................(D2) x1

5 Main PWB 1. Screw ....................... (E1) x1 9-2

6 Amp. PWB 1. Screw ....................... (F1) x5 10-3

7 Front Panel 1. Screw .......................(G1) x1 10-3

8 Display PWB 1. Knob......................... (H1) x1 10-4

9 Tape Mechanism 1. Open the cassette holder. ... 10-4

Headphones PWB
Mic PWB

(Note 2) 2. Hook......................... (P2) x2

the hole on the loading chassis bottom.

While holding the lock lever, rotate the cam gear anticlockwise until the

cam gear rib engages with the clamp lever.

the CD tray cover, and close.
(Note 1)

2. Screw .......................(C1) x1

3. Hook......................... (C2) x3

4. Hook......................... (C3) x2

5. Socket ......................(C4) x2

2. Flat Cable ................ (E2) x1 10-2

3. Socket ...................... (E3) x5

2. Socket ...................... (F2) x1

3. PWB Holder ............. (F3) x2

2. Screw ..................... (H2)

3. Flat Cable ................(H3) x1

2. Screw ........................(J1) x5

1. Screw ....................... (K1) x1 10-4

1. Screw ....................... (L1) x1 10-4

2. Cover ...................... (M2) x1

2.

3.

3. Socket ...................... (P3) x4

2. Hook.........................(Q2) x3

PROCEDURE

Turn fully the lock lever in the.

arrow direction
While holding the lock lever,rotate
the cam gear until the cam gear
rib engages with the clamp lever.

Push the slide chassis backward to

engage the claw with the groove
and remove it in the direction

of the arrow. .................

.

(Fig. 10-1)

FIGURE

10-2,10-3

x13

9-3

10-1

10-6

(N1) x6

CD-BK300W

CD-BK300W

(A1) x 2
ø3 x 12mm

Side Panel
(Right)

(B1) x 2
ø3 x 10mm

(B1) x 4
ø3 x 10mm

Rear
Panel

Figure 9-1

CD Servo
PWB

(C4) x 2

(C3) x 1

Pull

Rear
Panel

(C1) x 1
ø3 x 10mm

(D1) x 1
ø3 x 10mm

Transformer PWB

(D2)x1

Amp.
PWB

(D1) x 6
ø3 x 10mm

Main PWB

Figure 9-2

Figure9-3

Note 2:

1. After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the front end
of the connector so as to protect the optical pickup from electro­static damage.

Note 3:

1. Be careful not to break the claw of the CD mechanism.

2. When fining back the cam gear assembly, let it lock by front
movement.

– 9 –

Top Cabinet

(B1) x 2
ø3 x 10mm

CD Tray Cover

1

Lug Wire

(D1) x 2
ø3 x 10mm

Lock Lever

CD Player Unit
(Bottom View)

(A1) x 2
ø3 x 12mm

Side Panel
(Left)

(C2) x 3

1

2

CD Player
Unit

(C3) x 1

(E1) x 1
ø3 x 10mm

CD-BK300W

Power PWB

(E2) x 1

Transformer
PWB

(E3) x 1

(E3) x 1

Figure 10-1

Clamp Lever

CD Player Unit
(Top View)

Cam Gear Rib

(E3) x 1

Front Panel

Mic PWB

Main PWB

Display PWB

(H2) x 13
ø3 x 10mm

Tape
Mechanism

(J1) x 5
ø3 x 10mm

Lug Wire

(K1) x 1
ø3 x 10mm

(H3) x 1

(H1) x 1

(L1) x 1
ø3 x 10mm

Mic PWB

Front Panel

Open

Cassette
Holder

Headphones
PWB

Figure 10-4

(M2) x 1

Turntable

(E3) x 1

(F3) x 1

Tape
Mechanism

Push

(F1) x 1

ø3 x 8mm

Figure 10-2

(F1) x 2

ø3 x 10mm

(F1) x 2

ø3 x 10mm

(F2) x 1

Amp.
PWB

Figure 10-3

Main PWB

Amp.
PWB

Headphones
PWB

(G1) x 1

ø3 x 8mm

(E3) x 1

(F4) x 1

(F3) x 1

Front
Panel

Push

Slide
Chassis

(M1) x 2

CD Player Unit

Figure 10-5

(N1) x 3

3

2

1

(N1) x 3

Figure 10-6

– 10 –

CD-BK300W

(Q2) x 3

(Q1) x 1

(Q1) x 1

CD
Mechanism

(C1) x 4

ø4 x 16mm

(B1) x 4

ø4 x 16mm

(D1) x 2

ø3 x 10mm

Tweeter

Woofer

Subwoofer

(P1) x 1
ø3 x 8mm

CD Servo

PWB

Slide
Chassis

(P3) x 2

(P2) x 2

(P3) x 2

Figure 11-1

CP-BK300

STEP REMOVAL PROCEDURE FIGURE

1 Side Panel/ 1. Screw ..................... (A1) x4 11-3

Front Panel 2. Net.......................... (A2) x1

3. Caching Holder ...... (A3) x4

4. Screw ..................... (A4) x4

2 Subwoofer 1. Screw ..................... (B1) x4 11-4

3 Woofer 1. Screw ..................... (C1) x4 11-4

4 Tweeter 1. Screw ..................... (D1) x2 11-4

Figure 11-2

(A1) x 4

ø4 x 20mm

(A3) x 2

(A4) x 2

ø4 x 20mm

Side Panel

Figure 11-3

Net

(A2) x 1

(A3) x 2

(A4) x 2

ø4 x 20mm

Fromt Panel

Figure 11-4

– 11 –

CD-BK300W

REMOVING AND REINSTALLING THE MAIN PARTS

TAPE MECHANISM SECTION

Perform steps 1 to 7 and 9 of the disassembly method to
remove the tape mechanism.

How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 12-1)

1. When you remove the screws (A1) x 2 pcs., the recording/
playback head and three-dimensional head of the erasing
head can be removed.

How to remove the playback head (TAPE 1)
(See Fig. 12-2)

1. When you remove the screws (B1) x 2 pcs., the playback
head.

How to remove the pinch roller (TAPE 1/2)
(See Fig. 12-3)

1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (C1) x 1 pc., in the
direction of the arrow <B>.

Note:

When installing the pinch roller, pay attention to the spring
mounting position.

Erase Head

(A1) x 2
Ø2 x 6mm

Figure 12-1

TAPE 2

TAPE 1

Clutch Ass'y

Record/Playback
Head

Clutch Ass'y

Playback
Head

How to remove the belt (TAPE 2) (See Fig. 12-4)

1. Remove the main belt (D1) x 1 pc., from the motor side.

2. Remove the FF/REW belt (D2) x 1 pc.

How to remove the belt (TAPE 1) (See Fig. 12-4)

1. Remove the main belt (E1) x 1 pc., from the motor side.

2. Remove the FF/REW belt (E2) x 1 pc.

How to remove the motor (See Fig. 12-5)

1. Remove the screws (F1) x 2 pcs., to remove the motor.

Motor

Clutch Ass'y

TAPE 2

(B1) x 1
Ø2 x 9mm

Pinch Roller
(C1) x 1

FF/REW
Belt
(D2) x 1

(B1) x 1
Ø2 x 5mm

Figure 12-2

Pull

<B>

Figure 12-3

Motor

Pull

Pinch
Roller
Pawl

<A>

TAPE 2
Main Belt
(D1) x 1

Motor

TAPE 1
Main Belt
(E1) x 1

(F1) x 2

Ø2.6 x 5mm

– 12 –

Main Belt
(D1) x 1

Main Belt
(E1) x 1

Figure 12-4Figure 12-5

TAPE 1
FF/REW

Belt
(E2) x 1

(A1) x 2

(A1) x 1

Loading Motor

Loading
Motor PWB

Slide
Chassis

(A1) x 2

Pulley

Drive Belt
(A2) x 1

Loading
Motor

CD MECHANISM SECTION

(B3) x 2
ø2.6 x 6mm

Shaft
(B4) x 1

Stop Washer
(B1) x 1

Gear
(B2) x 1

CD Mechanism

Pickup

TAPE MECHANISM

Tape
Motor

Variable Resistor in motor

Perform steps 1, 2, 3, 12, 13, 14 and 15 of the disassembly
method to remove the CD mechanism.

How to remove the loading motor
(See Fig. 13-1)

1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.

2. Remove the drive belt (A2) x 1pc.

How to remove the pickup (See Fig. 13-2)

1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2) x 1 pc.

2. Remove the screws (B3) x 2 pcs., to remove the shaft (B4).

3. Remove the pickup.

Note

After removing the connector for the optical pickup from the
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.

CD-BK300W

Figure 13-1

MECHANISM SECTION

• Driving Force Check

Play: TW-2111 Tape 1: Over 80 g

• Torque Check

Play: TW-2111 30 to 80 g.cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
Rewind: TW-2231 — 70 to 180 g.cm

Torque Meter Specified Value

Tape 2: Over 80 g

Torque Meter

Specified Value

Tape 1

ADJUSTMENT

Tape 2

– 13 –

Figure 13-2

• Tape Speed

Test Tape

Normal MTT-111 Variable 3,000 ± 30 Hz Speaker
speed Resistor in terminal

Adjusting

Point

motor. (Load

Figure 13-3

Specified

Value

Instrument

Connection

resistance:
6 ohms)

CD-BK300W
TUNER SECTION

fL: Low-range frequency
fH: High-range frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

AM IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2

Coverage 1.1 ± 0.1 V
AM Tracking 990 kHz 990 kHz (fL): T303 *1

*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301

Frequency Frequency

Display

Setting/

Adjusting

Parts

SO302

FM ANTENNA

TERMINAL

FM BAND
COVERAGE fL

Instrument

Connection

T301

T351

IC301

• FM RF

Signal generator: 1 kHz, 40 kHz dev., FM modulated

Test Stage

Frequency Frequency

Display

FM Band — 87.50 MHz T301(fL): *1
Coverage 1.3 V ± 50 mV

FM RF 98.00 MHz 98.00 MHz L312 *2

(10-30 dB)

Setting/

Adjusting

Point

*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker terminal

CNP301

AM LOOP

ANTENNA

T302

FM IF

L312

FM RF

T303

AM BAND
COVERAGE fL

MAIN PWB

AM
TRACKING fL

R316

TP301

T306

Instrument

Connection

AM IF

Figure 14-1 ADJUSTMENT POINTS

CD SECTION

• Adjustment

Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.

Items adjusted automatically

(1) Offset adjustment (The offset voltage between the head

amplifier output and the VREF reference voltage is
compensated inside the IC.)

* Focus offset adjustment
* Tracking offset adjustment

(2) Tracking balance adjustment (waveform drawing

Fig.14-2 EFBL)

(3) Gain adjustment (The gain is compensated inside the IC

so that the loop gain at the gain crossover frequency will
be 0 dB.)

* Focus gain adjustment
* Tracking gain adjustment

TP302

R357

CH1=500 mV

DC 10:1

T

CH2=200 mV

DC 10:1

CH2 : 0.000 V
CH3 : 0.00 V
CH4 : 0.00 V

Stopped

T

FDO

1

TE

3

EFBL

2

Smoothing : ON CH1 : 0.000 V
BW : FULL

CH3=1 V

DC 10:1

=Record Length=

Main : 100 K
Zoom : 2 k

1999/04/05 20:26:47

500 ms/div

(500 ms/div)

NORM:20 kS/s

CH2
v/DIV
200 mV

=Trigger==Filter= =Offset=
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2 µs

– 14 –

Figure 14-2

TEST MODE

• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<X-BASS> + <CD> + <POWER> TEST:CD operation test

Function:-CD test mode.

-Enter test mode.

C D T E S T

OPEN/CLOSE operation is using manual.

<< >>, << >> buttons make pick's slide possible.

CD-BK300W

IL isn't done

<<MEMORY>>
key input

Adjustment result
automatically will
display as below
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

explanation:
a) Focus off set ="FOFF_XX"
b) Tracking off set ="TOFF_XX"
c) Tracking balance ="TBAL_XX"
d) Tracking Gain ="TGAN_XX"
f) Focus Gain ="FGAN_XX"
g) RF level shift ="RFLS_XX"

<<PLAY>> key input.

Do TOC IL. Do normal play
When these following key is input
into PLAY key, track number can
be appoint directly

<< 1>> key: Track 4
<< 2>> key: Track 9
<< 3>> key: Track 15

<<STOP>> key input.

STOP

<<MEMORY>> key input.

Laser ON.

<<MEMORY>> key input.

Tracking OFF play at that
specific point.

<<MEMORY>> key input.

Tracking ON play from
that specific point.

<<MEMORY>> key input.

Adjustment result automatically will
display as below for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

<<STOP>> key input.

VOL — Last memory
BAL — CENTER
P.GEQ — FLAT
X-BASS — OFF

To cancel : Power OFF

– 15 –

STOP

Sliding the PICKUP with
<<

>>, << >> button

must only be in STOP mode.

CD-BK300W

Standard Specification of Stereo System Error Message Display Contents

Error Contents DISPLAY Notes
Output while Device Protection Operation 'PROTECT' 00: While in Protect Circuit Operate

01: Over Current Detection
02: DC Detection
03:

TAPE Mechanism Error 'ER-TA**' 00: Tape Mechanism Error

01: Initial Error
02:
03:

CD/VCD Pickup Mechanism Error 'ER-CD**' 00: Pickup Mechanism Error

01: PU-IN SW Detection NG
02:
03:
04:

CD Changer Mechanism Error 'ER-CD**' 10: Changer Error

11: Initial Error
12:
13:

Tray Error 'ET-CD**' 20: Tray Error

21:
22:

23:
Focus Not Match 'NO DISC'
IL Time Over 'NOT READ'

TUN PLL Unlock 'ER-TU**' 00: TUN Error

01: PLL Unlock

02:

03:

– 16 –

TO MAIN SECTION

TO DISPLAY SECTION

SW1

OPEN/

CLOSE

SW2

CLAMP

SW3
DISC

NUMBER

T/T UP DOWN

M

CD-BK300W

M3

LOADING

XL1

33.8688 MHz

+3.3V

316452

316452

OC. DISC NO

CLAMP SW

CD RES

CLK

DI

DO

CE

DRF

+5V (+B6)

+5V (+B6)

AGND

R-CH

DGND

L-CH

CNP7

61

CE

62

CLK

63

DI

64

DO

65

WRQ

66

RES

615432

42

LCHO

LC78645E

CD SERVO

XOUT

48

XIN

49

VVDD

XVDD

RFVDD

5

ADAVDD

7

18

LVDD

46

41

47

WRQ

4543 44 25 70

LVSS

RVSS

RCHO

IC1

RVDD

FIN2

FIN1

54

3271689

Q3

71

CONT2

CONT3

CONT4

CONT5

SLDO

SPDO

LDD

LDS

TIN2

TIN1

80

79

987

10

FD0
TD0

CNP8

75
69
57
56
55
51
50
40

37
28
19

26

23
22
21
20

+5V

316452

17 25

12

18

VCC1

40

VCC4

FOCUS/TRACKING/

24

VCC2

23

VCC3

SPIN/SLED

BI4

CNS4

CNP4

41 8339

42

IC2

M63001FP

DRIVER

35

29
22

21

14

8

CONSTANT

VOLTAGE

+5V

PICKUP UNIT

Q2

LASER

DRIVER

+3.3V

Q1

FOCUS COIL

TRACKING COIL

4765

M1

SPINDLE

MOTOR

M2

SLED

MOTOR

M

M

168226 27

15

SW4

PICKUP

IN

Figure 17 BLOCK DIAGRAM (1/3)

– 17 –

CD-BK300W

(

7

8

9

FM

ANTENNA

AM

CNP301

CNP301

1
2

BF301

B.P.F

T303

1

TA7358AP

FM FRONT END

34578

2

FM

L312 T301

RF

AM TRACKING

IC301

T306

6
9

FM

OSC

FM
OSC

OSC BUFF

Q302

AM BAND
COVERAGE

FM IF

T302

FM IFDET.

FM MPX./

AM IF MPX.

CF303

IC303

LA1832S

10.7MHz

CF351

DET

VCOFM

X351
456kHz

MO/ST

FM/AMMPXIN

1216182123

L

R

450kHz

CF352

T351

AM IF

12 45981713

AM MIX

AM RF IN

AM OSC IN

7

STEREO

FM+BGNDAM IF

FM/AM

OUT

+B4

14
15

JK1

MIC

VRK1

MIC

VOLUME

FROM CD SECTION

CNP7

P.B. HEAD

REC. P.B. HEAD

MIC IN

TAPE 1

TAPE 2

ICK1

M65856SP

MIC AMP.

LATCH

DATA
LOUT

9

ROUT

L IN

12

R IN

13

VCC

+B5

QK1

CNS11

1
2
3

L-CH

R-CH

L-CH

R-CH

AC BIAS

CLK

P.B.

REC

40
41

42
36
35
31
32

23

SWITCHING

Q103­Q106

+B4

8

5
6

2
3

ICK2

KIA4558P

OPE AMP.

PLAYBACK AND

PLAYBACK AMP.

L(T1)
R(T1)

L(T2)

R(T2)
L NF

R NF

POP REDUCE

L REC

R REC

REF

SWITCHING

Q107
Q108

L

7
1

R

IC101

RECORD/

1

24

2

23

3

22

6

T1/T2

9

REC

16
14

NOR/

12

HIGH

15 19

SWITCHING

Q111

P.B

H/N

T1/T2

+B

FM

13

4

21

5

20

7

18

8

17

10

L
R

L
R

L NF
R NF

ALC

+B4

PB

REC

VT

+B4

Q360

SWITCHING

X352

4.5MHZ

20 1 22 15 16 11

OSC

FM

JK601

L
R

IC302

LC72131

PLL(TUNER)

MO/ST

FM/AM

79

VIDEO IN
AUX

TAPE

TUNER

CD

MIC

9

L
R

16
10

L

15

R
L

11

AUDIO PROCESSOR

14

R
L

12
13

R

L

CLK

DO

DI

CE

3

456

2110

IC601

LC75341

7 18 8 17 3

R

17

23

+B4

DI

CE

CLK

Q121
Q122

MUTING

–B2

1
2

24
21

4

R
L

IC702

4

IC703

KIA4558P
OPE AMP.

+B4

8

Q603
Q604

1

7

–20dB

ATT

Q605
Q606

SYSTEM

MUTE

REC/PLAY

IC701

IX042

T1/T2

2

2

ERASE

HEAD

BIAS
OSC

Q128

L104

Q109

SWITCHING

Q110

SWITCHING

Q124
L103

BIAS

Q126

Figure 18 BLOCK DIAGRAM (2/3)

– 18 –

BIAS

CD-BK300W

6
6

+B4

13614 1520 29343553 5657582

SP. DET.

5

L

6

2

R

3

KIA4558P

OPE AMP.

+B4

8

IC903

7
1

VF1

L
R

POWER AMP.

R

15

+Vcc

8

+B3

VF2

+B4
A+10V

+B5

+B6

–VF

–Vcc

9

M12V

UN-SW5V

+5V

IC902
STK4029S

1

L

–20dB

ATT

Q605

03

Q606

04

SYSTEM

MUTE

REC/PLAY

28

IC701(2/2)

IX0427AW

.

29

T1/T2

~~~

Q701-Q703
Q710-Q712

60

-

78
79

VLOAD

80

-

85
86

-

91
92

­VDD

100

2

+B5

Q906
Q905
Q907
Q908

IC901

1

STK40271
POWER AMP.

15

–Vcc

+Vcc

9

Q902

8

Q901
Q903
Q904

7

R-OUT
L-OUT

11

13

–B1

+B1

VOLTAGE
REGULATOR

Q850

Q851

AN78L05

Q821

KIA7805AP

Q852

VOLTAGE
REGULATOR

FL701

FL DISPLAY

~

+B5

SPAN

VDD

VDD

+B5

SP RELAY

ON-OFF

POWER TRANSFORMER

61

LATCH

KARAOKE

SYSTEM MICROCOMPUTER

6541 7 9 10111213 151617 20212223

XL701

4.194304MHz

RESET

R-OUT

7

L-OUT

11

13

–B2

+B2

D802

D803

D804~D807

Q801

RESET

Q709

IC701(1/2)
IX0427AW

+B5

SELECTOR

F803

T5A L 250V

F801

T4A L 250V

F802

T4A L 250V

F804

T5A L 250V

F806

T2A L 250V

F805

T2A L 250V

JOG701

JOG

RX701
REMOTE

1

404142434445464849505152535455565761

39
38
37
36
35

+B5

34

AVDD

33

-

31

23

CLK

T801

24

RY902

T.F.

22

58

RY901

CEDIDO

--

Q909

INPUT/OUTPUT

FAN MOTOR

DRIVER

Q910

SECTION

3

SENSOR

2

KEY
SW701-SW703
SW709-SW717
SW722-SW734

IC704

BU2092F

EXPANDER

1
2

IC704

3

4

TO CD

+B3

JK670

HEADPHONES

+B6

M

MOTOR

+B6

M

MOTOR

MAIN
SUBWOOFER

SO901

SW801

VOLTAGE

SELECTOR

230-240 V

220 V
127 V
110 V

+B5

M901

FAN

M902

FAN

+B6

18

AC POWER
SUPPLY CORD
AC 110/127/220/
230-240 V, 50/60 Hz

BIAS

Figure 19 BLOCK DIAGRAM (3/3)

– 19 –

CD-BK300W

9

0
1
2
3
4
5
6
7
8
9

0

8

7

6

5

4

3

2

L

R14

A

PICKUP UNIT

B

C

D

E

CD MOTOR PWB-G

SPINDLE

MOTOR

MOTOR

PICKUP IN

F

TR+

TR–

M1

M2

SLED

SW4

FO+
FO–

M

M

GND

+
–

+
–

VREF

SPIN

SLIDE

PU-IN

VCC

TR–

TR+
FO+
FO–

PD
VR

LD

CD SERVO PWB-C

CD SIGNAL

R7

47

7
6
5
4
3
2
1

1
2
3
4
5
6
7
8

CNS3A

6
5
4
3
2
1

CNS1A

7
6
5
4
3
2
1

CNS2A

1
2
3
4
5
6
7
8

6
5
4
3
2
1

VCC
VREF
E
A
B

F
C

CNP1

TR–
TR+
FO+
FO–
GND
PD
VR
LD

CNP2

SP+
SP–
SL+
SL–

PUIN
GND

CNP3

R4

12K

R6

33K

R5

12K

R3

33K

C1

R1

12K

47/25

100/10

C40

R2

0.01

C39

MUTE

220/6.3

12K

C2

C38

0.01

–

+

VREF

–

+

R44

VCC

STANDBY

++–

+

–

+

–

+

–

+

DRIVER

12K

SLDO

–

–

LASER

R9

3.3

C3

47/25

Q1

KTA1266 GR

SL–

SL+

C4

C49

0.001

101112131415161718192021

IC2

M63001FP
FOCUS/TRACKING/
SPIN/SLED DRIVER

47/25

R10
27K

TP3

9

GND

8

C6

0.1

C7

100P

C50
22P

(CH)

C9

100/10

TR–

7

TP2

TR+

6

C5

0.047(ML)

R12

330

C8

0.0047
TP1

C11

0.22/50

C12

100P

FO+

FO–

5

432

R11

C10

10/50

4

1K

R13

1

10K

1

1
1
1
1
1
1
1
1
1
1
2

2

FD

CNS1B

7

7

6

6

E

5

5

A

4

4

B

3

3

F

2

2

C

1

1

CNS2B

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

CNS3B

1

1

2

2

3

3

4

4

5

5

6

6

G

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 39.

1

23456

Figure 20 SCHEMATIC DIAGRAM (1/10)

– 20 –

M–

M+

VCC4

22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

SP–

SP+

SPO

VCC2

VCC3

C41
100/10

CD-BK300W

M+

FO+

4

3

C34

100P

C33

100P

C32

100P

C30

100P

C28

100P

C27

0.022
1K

DI

C2F

9

CL

CE

XIN

DOUT

60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41

TEST

C14

R31

12

DATA

DATACK

R43
220

100/10

C36

0.1

C37

R42

1.2K

C5

7(ML)

10K

R11

1
2
3
4

8

5

47

6
7

TP1

8
9

10

C10

11

10/50

12
13

C11

14

.22/50

15

4

R13

1K

16
17
18
19

20

2

1

FD

4321

R41 12K

LDS

LDD

8079787776757473 72717069 6867666564636261

SLCO

FR

SLCIST
EFMIN

RF
RFVDD

RSVSS
FIN1 A

FIN2 B
TIN1 E

TIN2 F
VREF
REF1
FE
TEC
TE
RFMON
JITTC

ADAVDD
ADAVSS
TDO

FDO

R14

VVDD

5

GPDAC

SLDO

SPDO

2122232425262728 29303132 3334353637383940

R17

1K

1K

R15

1K

R16

TO

C35

2.2/50

0.047

680

R40

PCKIST

8

VVSS

PDO2

R39

PDO1

7

680

IC1

LC78645E

CD SERVO

6

DEFECT

SBCK/FG

CONT5

CONT4

1K

1K

R18

R20
10K

(ML)

CONT2

CONT3

FSEQ

V/*P

VSS

DRF

VDD5

MONI3

MONI2

MONI1

DO

VRES

VWRQ

ASDFIN

ASDACK

ASLRCK
16MOUT

FSX/16MIN

VSS

MONI5

MONI4

C13

0.022

LRSY

EFLG

XVSS

XOUT
XVDD

RVDD
RCHO

RVSS

LVSS

LCHO

VDD

R38 1K
R37 1K
R36 1K
R35 1K
R34 1K
R33 1K
R32 1K

R29

2.2K
R28

2.2K

11

10

XL1

33.8688 MHz

ZD1 DZ3.3BSB

C16

330/6.3

LVDD

C23

C44

10/50

0.001
R24

2.2K

R26
10K

R22

100

C24

10/50

R25

2.2K
C26

0.0015

R27

10K

C25

0.0015

WRQ

CD RES

CLAMP SW

O/C, DISC NO

C51

0.022

L1

0.82µH

C48

0.022

Q2

KTC3203 Y

R-CH

AGND

L-CH

DGND

CONSTANT

VOLTAGE

DRF

CE

DO

DI

CL

+5V
+5V

CNP7

CNP8

1
2
3
4
5
6
7
8
9

1
2
3
4
5

6

CNS703

FROM

DISPLAY PWB

P25 10-B

CNS11

FROM

MAIN PWB

P22 1-A

9404142

LD_M–

VCC4

LD_M+

R46

470

D2

DS1SS133

3

1

2

Q3

KRC102 M

R49

1

R45
470

D1
DS1SS133

• The numbers 1 to 12 are waveform numbers shown in page 40.

7

8 9 10 11 12

Figure 21 SCHEMATIC DIAGRAM (2/10)

– 21 –

R19
15K

R30

8.2K

CNP4

R47

100

C18

100/10

ZD2

DZ3.9BSB

1
2
3
4
5
6

CNS4

220

R23

BI4
1
2
3
4
5
6

OPEN/CLOSE

1

2

3

4

5

6

CD LOADING

MOTOR PWB-E

SW1

M

UP DOWN

LOADING

CLAMP

DISC NO.

M3 T/T

SW2

SW3