Sharp CDC-449-W, CDK-449-W Service manual

CD-C449W/K449W

SERVICE MANUAL

No.S8875CDC449W/

CD-C449W
CD-K449W

CD-C449W mini component system consisting of
CD-C449W mini component system and
CP-C449 speaker system.
CD-K449W mini component system consisting of
CD-K449W mini component system and
CP-C449 speaker system.

• In the interests of user-safety the set should be restored to its

● SRS, the SRS Logo (●) and the Sound Retrieval System
are registered trademarks of SRS Labs, Inc. in the United
States.

original condition and only parts identical to those specified be
used.

CONTENTS

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

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

VOLTAGE SELECTION......................................................................................................................................................3

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

OPERATION MANUAL ...................................................................................................................................................... 7

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

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

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

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 17

TYPES OF TRANSISTOR AND LED................................................................................................................................17

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 18

BLOCK DIAGRAM ........................................................................................................................................................... 19

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 22

TROUBLESHOOTING ..................................................................................................................................................... 46

FUNCTION TABLE OF IC................................................................................................................................................ 50

FL DISPLAY..................................................................................................................................................................... 57

REPLACEMENT PARTS LIST/EXPLODED VIEW

Page

SECTION

KARAOKECIRCUIT

SHARP CORPORATION

CD-C449W

– 1 –

CD-K449W

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

CD-C449W/K449W

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 WITDOUT A COMPACT DISC IN POSITION AND THE

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

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

PRE-SET BEFORE SHIPMENT.

DO NOT ATTEMPT TO RE-ADJUST THE LASER PICK-UP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICK-UP 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.

CAUTION

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

● This Mini Component System is classified as a CLASS
1 LASER product.

● The CLASS 1 LASER PRODUCT label is located on the
rear cover.

● Use of controls, adjustments or performance of proce­dures other than those specified herein may result in
hazardous radiation exposure.

As the laser beam used in this compact disc player is
harmful to the eyes, do not attempt to disassemble the
cabinet. Refer servicing to qualified personnel only.

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.

VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.

– 2 –

CD-C449W/K449W

CD-C449W/K449W

SPECIFICATIONS

● General

Power source: AC 110/127/220/230-240 V,

50/60 Hz

Power consumption: 120 W
Dimensions: Width; 270 mm (10-5/8")

Height; 316 mm (12-1/2")
Depth; 343 mm (13-1/2")

Weight: 9.2 kg (20.3 lbs.)

● Amplifier section

Output power: PMPO; 1200 W

MPO; 240 W (120 W + 120 W)
(10 % T.H.D.)
RMS; 150 W (75 W + 75 W)
(10 % T.H.D.)

Output terminals: Speakers; 8 ohms

Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Input terminals: Video/Auxiliary (audio signal)

1/2; 500 mV/47 kohms
Microphone 1/2; 1 mV/4.7 kohms
(CD-K449W only)

● Tuner section

Frequency range: FM; 88 - 108 MHz

SW2; 9.5 - 21.85 MHz
SW1; 3.2 - 7.3 MHz
MW; 531 - 1,602 kHz

● Cassette deck section

Frequency response: 50-14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/
playback)

Wow and flutter: 0.15 % (WRMS)

● Compact disc player section

Type: 3-disc multi-play compact disc

player

Signal readout: Non-contact, 3-beam semi-

conductor laser pickup

D/A converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)

CP-C449

● Speaker section

Type: 3-way type [130 mm (5-1/8")

woofer, 50 mm (2") tweeter and
super tweeter]

Maximum input
power: 150 W
Impedance: 8 ohms
Dimensions: Width; 220 mm (8-11/16")

Height; 316 mm (12-1/2")
Depth; 284 mm (11-3/16")

Weight: 3.6 kg (7.9 lbs.)/each

VOLTAGE SELECTION

The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.

QACCA0001AW00

QACCE0008AW00

Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

AQCCJ0003AW00

– 3 –

CD-C449W/K449W

CD-C449W/K449W

SPECIFICATIONS

● General

Power source: AC 110/127/220/230-240 V,

50/60 Hz

Power consumption: 120 W
Dimensions: Width; 270 mm (10-5/8")

Height; 316 mm (12-1/2")
Depth; 343 mm (13-1/2")

Weight: 9.2 kg (20.3 lbs.)

● Amplifier section

Output power: PMPO; 1200 W

MPO; 240 W (120 W + 120 W)
(10 % T.H.D.)
RMS; 150 W (75 W + 75 W)
(10 % T.H.D.)

Output terminals: Speakers; 8 ohms

Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Input terminals: Video/Auxiliary (audio signal)

1/2; 500 mV/47 kohms
Microphone 1/2; 1 mV/4.7 kohms
(CD-K449W only)

● Tuner section

Frequency range: FM; 88 - 108 MHz

SW2; 9.5 - 21.85 MHz
SW1; 3.2 - 7.3 MHz
MW; 531 - 1,602 kHz

● Cassette deck section

Frequency response: 50-14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/
playback)

Wow and flutter: 0.15 % (WRMS)

● Compact disc player section

Type: 3-disc multi-play compact disc

player

Signal readout: Non-contact, 3-beam semi-

conductor laser pickup

D/A converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)

CP-C449

● Speaker section

Type: 3-way type [130 mm (5-1/8")

woofer, 50 mm (2") tweeter and
super tweeter]

Maximum input
power: 150 W
Impedance: 8 ohms
Dimensions: Width; 220 mm (8-11/16")

Height; 316 mm (12-1/2")
Depth; 284 mm (11-3/16")

Weight: 3.6 kg (7.9 lbs.)/each

VOLTAGE SELECTION

The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.

QACCA0001AW00

QACCE0008AW00

Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

AQCCJ0003AW00

– 3 –

CD-C449W/K449W

CD-C449W/K449W

■ Front panel

11. (CD) Disc Tray

12. (CD) Disc Number Select Buttons

13. (CD) Disc Skip Button

14. (CD) Open/Close Button

15. (CD) Disc Number Indicators

16. SRS Indicator

17. (TAPE 2) Direction Indicators

18. (TAPE 2) Reverse Mode Indicator

19. (CD) Play Indicator

10. (CD) Repeat Play Indicator

11. (CD) Pause Indicator

12. (TAPE 2) Record Indicator

13. Timer Record Indicator

14. Timer Play Indicator

15. Sleep Indicator

16. Extra Bass Indicator

17. (CD) Random Play Indicator

18. (CD/TUNER) Memory Indicator

19. (TUNER) FM Stereo Indicator

20. (TUNER) FM Stereo Mode Indicator

21. Karaoke Indicator (CD-K449W Only)

22. Spectrum Analyzer

23. Function Selector Buttons

24. Equalizer Mode Selector Buttons

25. Extra Bass Button

26. Volume Control

27. On/Stand-by Button

28. Headphone Socket

29. Karaoke Maker Switch (CD-K449W Only)

30. Microphone Sockets (CD-K449W Only)

31. Microphone Level Controls (CD-K449W Only)

32. Digital Echo Control (CD-K449W Only)

33. 3D Surround/Demo Mode Button

34. Clock Button

35. Sleep Button

36. (TAPE 2) Reverse Mode Button

37. (CD) Pause Button

38. Jog Dial

39. (CD/TAPE) Stop Button

40. (TAPE) Record Pause Button

41. Balance Control Buttons

42. Timer Button

43. Memory Button

44. (CD) Clear Button

45. (CD) Track Down/Review Button

3 (TAPE 2) Fast Wind Button
3 (TUNER) Tuning Down Button

46. (TAPE 2) Reverse Play Button

47. (CD) Play/Repeat Button

3 (TAPE 1) Play Button
3 (TAPE 2) Forward Play Button

48. (CD) Track Up/Cue Button

3 (TAPE 2) Fast Wind Button
3 (TUNER) Tuning Up Button

49. Editing Speed Selector Buttons

NAMES OF PARTS

1

9

13

5

10

11

1415 16

342

67

12

17

19 20

23

24

27 28 29

21

22

25 26

30 31 32

34 35 36 37 38 39 40 41

42 43 44 45 46 47 48 49

8

18

33

– 4 –

CD-C449W/K449W

11.

(TAPE 1) Cassette Compartment

12.

(TAPE 2) Cassette Compartment

■ Rear panel

11.

CD Digital Output Socket

12.

Video/Auxiliary (Audio Signal) Input Sockets

13.

Span Selector Switch

14.

FM 75 Ohms Aerial Terminal

15.

Aerial Earth Terminal

16.

SW1/SW2/MW Aerial Terminal

17.

AC Voltage Selector

18.

AC Power Lead

19.

Speaker Terminals

1

1

2

23

4
5

6

CP-C449

■ Speaker section

11.

Super Tweeter

12.

Tweeter

13.

Woofer

14.

Bass Reflex Ducts

15.

Speaker Terminals

7

8

9

1
2

5

3
4

– 5 –

CD-C449W/K449W

■ Remote control

11.

Remote Control Transmitter LED

● CD control section

12.

Disc Number Select Buttons

13.

Track Down/Review Button

14.

Track Up/Cue Button

15.

Disc Skip Button

16.

Play/Repeat Button

17.

Stop Button

18.

Memory Button

19.

Clear Button

10.

Random Button

11.

Pause Button

2
3

4

1

5
6
7

● Tuner control section

12.

Preset Up/Down Buttons

● Tape control section

13.

(TAPE 2) Record Pause Button

14.

(TAPE 2) Reverse Play Button

15.

(TAPE 1) Play Button

3

(TAPE 2) Forward Play Button

16.

(TAPE 1/2) Stop Button

17.

(TAPE 2) Fast Wind Buttons

● Common section

18.

3D Surround Pass Button

19.

Equalizer Mode Button

20.

Function Selector Buttons

21.

Balance Control Buttons

22.

On/Stand-by Button

23.

Dimmer Button

24.

3D Surround Mode Button

25.

Extra Bass Button

26.

Volume Up/Down Buttons

13
14

18
19

20

21

22

23

89 11

10

12

15

16

17

24
25

26

– 6 –

SETTING THE CLOCK

OPERATION MANUAL

1

Press the ON/STAND-BY button to enter the stand-by mode.

CD-C449W/K449W

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

Jog dial

CLOCK

ON/STAND-BY

MEMORY

TUNING
( )

2

3

4

0:00 AM 12:00 AM 0:00

5

6

7

2

Press the CLOCK button.

3

Within 5 seconds, press the MEMORY button.

4

Turn the jog dial to select the time display mode.
"0:00" → The 24-hour disp lay will ap pear.

(0:00 - 23:59)
"AM 12:00" → The 12-hour display will appear.
(AM or PM 12:00 - 11:59)
"AM 0: 00" → The 12-h our display w ill appear.
(AM or PM 0:00 - 11:59)

● Note that this can only be set when the unit is first installed
or it has been reset (see page 28).

5

Press the MEMORY button.

6

Adjust the hour by turning the jog dial.

● When the jog dial is turned one click clockwise, the time will
increase by 1 hour. When it is turned one click anti-clockwise,
the time will decrease by 1 hour.
Keep turning the jog dial to change the time continuously.

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

7

Press the MEMORY button.

8

Adjust the minutes by turning the jog dial.

● When the jog dial is turned one click clockwise, the time will
increase by 1 minute. When it is turned one click anti-clock­wise, the time will decrease by 1 minute.
Keep turning the jog dial to change the time continuously.

● The hour setting will not advance even if minutes advance
from "59" to "00".

9

Press the MEMORY button.

● The clock starts operating from "0" seconds. (Seconds are not
displayed.)

Note:

● In the event of a power failure or when the AC power lead is
disconnected, the clock display will go out.
When the AC power supply is restored, the clock display will
flash on and off to indicate the time when the power failure
occurred or when the AC power lead was disconnected.
If this happens, follow the procedure below to change the clock
time.

To change the clock time:

When the unit is in the stand-by mode:

①

Press the MEMORY button.

8

9

②

Perform steps 6 - 9 above.

When the unit is on:

①

Press the CLOCK button.

②

Within 5 seconds, press the MEMORY button.

③

Perform steps 6 - 9 above.

To see the time display:

Press the CLOCK button.

● The time display will appear for about 5 seconds.

To change the time display mode:

①

Perform steps 1 - 2 in the section "RESETTING THE MICRO­COMPUTER", on page 28.

②

Perform steps 1 - 9 above.

– 7 –

CD-C449W/K449W

■

FM/MW interval (span)

The International Telecommunication Union (ITU) has estab-

lished that member countries should maintain either a 10 kHz or

a 9 kHz interval between broadcasting frequencies of any MW

station. The illustration shows the 9 kHz interval zones (regions

1 and 3), and the 10 kHz interval zone (region 2).

Before using the unit, set the SPAN SELECTOR switch (on the

rear panel) to MW tuning 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 to "50/9" for 9 kHz MW

interval (50 kHz FM interval), and "100/10" for 10 kHz MW

interval (100 kHz FM interval).

3

Press the ON/STAND-BY button whilst holding down the

button and the FLAT button.

Caution:

● The operation explained above will erase all data stored in

memory including clock and timer settings, and tuner and CD

presets.

FM/MW

(kHz)

50/9

100/10

SPAN

SELECTOR

RESETTING THE MICROCOMPUTER

Reset the microcomputer under the following conditions:

● To erase all of the stored memory contents (clock and timer

settings, and tuner and CD presets).

● If the display is not correct.

● If the operation is not correct.

1

Press the ON/STAND-BY button to enter the stand-by mode.

2

Press the ON/STAND-BY button whilst holding down the

button and the FLAT button.

Caution:

● The operation explained above will erase all data stored in

memory including clock and timer settings, and tuner and CD

presets.

ON/STAND-BY

FLAT

(Continued)

■

Remote control

● When inserting or removing the batteries, push them towards

the battery terminal.

● Installing the batteries incorrectly may cause the unit to mal-

function.

Precautions for battery use:

● Insert the batteries according to the direction indicated in the

battery compartment.

● Replace all old batteries with new ones at the same time.

● Do not mix old and new batteries.

● Remove the batteries if they are weak or if the unit will not be

used for long periods of time. This will prevent potential dam-

age due to battery leakage.

Caution:

Do not use rechargeable batteries (nickel-cadmium battery, etc.).

Notes concerning use:

● Replace the batteries if the operating distance is reduced or if

the operation becomes erratic.

● Periodically clean the transmitter LED on the remote control

and the sensor on the main unit with a soft cloth.

● Exposing the sensor on the main unit to strong light may in-

terfere with operation. Change the lighting or the direction of

the unit.

● Keep the remote control away from moisture, excessive heat,

shock, and vibrations.

+

-

-

+

15

15

● 2 "AA" size bat-

teries (UM/SUM-

3, R6, HP-7 or

similar)

0.2 m - 6 m

(8" - 20')

– 8 –

CD Tray Cover

CD Player
Unit

( E1 ) x10
ø3 x8mm

( C3 ) x1
ø3 x8mm

Hook
( C1) x3

( C2 ) x1

( C4 ) x2

( C4 ) x1

Rear Panel

Main PWB

Front Panel

1

1

2

Tuner PWB

Pull

(C2) x1

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 suffcient care on static electricity of integrated
circuits and other circuits when servicing.

CD-C449W/K449W

STEP 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 Tuner PWB 1. Socket .................... (D1) x1 10-1

5 Rear Panel 1. Screw ..................... (E1) x11 9-2

6 Main PWB 1. Flat cable ............... (F1) x2 10-1

7

Karaoke PWB
(CD-K449W only)

8 Front Panel 1. Flat wire ................. (H1) x1 10-2

9

Power Amp. PWB

10

Power Supply PWB

11 Display PWB 1. Knob....................... (L1) x2 10-4

12 CD Switch PWB 1. Screw ..................... (M1) x3 10-4

13

Headphones PWB

14 Tape Mechanism 1. Screw ..................... (P1) x6 10-4

15 Turntable 1. Screw ..................... (Q1) x1 10-5

16 Disc Tlay 1. Screw ..................... (R1) x2 10-5

17 CD Servo PWB 1. Screw ..................... (S1) x1 10-6

(Note2) 2. Socket .................... (S2) x4

18 CD Changer 1. Screw ..................... (T1) x4 11-1

Mechanism

19 CD Mechanism 1. Screw ..................... (U1) x1 11-1

Note 1:

How to open the changer manually. (Fig. 10-3)

1. Then, turn fully the lock lever in the arrow direction through
the hole on the loading chassis bottom in this state.
After that, push forward the CD player base.

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

PROCEDURE

the CD cover, and close.
(Note 1)

2. Hook....................... (C1) x3

3. Hook....................... (C2) x2

4. Screw ..................... (C3) x1

5. Socket .................... (C4) x3

2. Screw ..................... (D2) x5

................................... 10-1

2. Flat wire .................

3. Socket...................... (F3) x3

4. Screw....................... (F4) x3

1. Screw ..................... (G1) x2 10-2

2. Screw...................... (H2) x2

1. Socket .................... (J1) x2 10-2

2. Screw ..................... (J2) x6

1. Screw ..................... (K1) x6 10-3

2. Nut.......................... (L2) x1

3. Screw ..................... (L3)x12

1. Screw ..................... (N1) x1 10-4

2. Cover ..................... (Q2) x1

2. Guide ..................... (R2) x2

(F2) x3

FIGURE

CD-C477W/K449W

( B1 ) x2
ø3 x8mm

Side Panel
(Right)

( B1 ) x4
ø3 x8mm

– 9 –

( A1 ) x2
ø3 x12mm

Rear Panel

LOCK
LEVER

CD-C449W/K449W

Top Cabinet

( A1 ) x2
ø3 x12mm

Side Panel
(Left)

( B1 ) x2
ø3 x8mm

Figure 9-1

Figure 9-2

Figure 9-3

CD-C449W/K449W

CD-K449W
Only

Rear
Panel

(D2) x1
ø3x10mm

(G1)x2
ø3x10mm

CD-K449W
Only

(J2)x5
ø3x10mm

(E1) x1
ø3 x10mm

(F2) x2

Karaoke
PWB

(G1)x1
ø3x10mm

(F2) x1

(F3) x2

Figure 10-1

(F1) x1

(D1) x1

Tuner PWB

(F4) x2
ø3x10mm

Front Panel

(D2) x4
ø3 x10mm

Front Panel

( J1 ) x2

(F3) x2

(F4) x1
ø3x10mm

Main PWB

( H1 ) x1

CD Switch PWB

Front Panel

(M1)x3
ø3x10mm

(L3)x12
ø3x10mm

Tape Mechanism

(P1)x6
ø3x10mm

( Q1 ) x1
ø3 x10mm

( Q2 ) x1

Lug Wire

Figure 10-4

(L1)x2

Washer

(L2)x1

Display
PWB

Headphones
PWB

Open

(N1)x1

ø3x10mm
Cassette
Holder (Left/Right)

Turntable

Power Supply PWB

(K1)x1
ø3x8mm

Figure 10-2

(K1)x4
ø4x8mm

( J2 ) x1
ø3x10mm

Power Amp. PWB

(K1)x1
ø3x10mm

( H2 ) x1
ø3x10mm

( R1 ) x1
ø3 x10mm

( R2 ) x1

CD Player Unit

( S2 ) x2

Disc Tray

( R1 ) x1
ø3 x10mm

( R2 ) x1

Figure 10-5

( S1 ) x1
ø3 x10mm

CD Servo PWB

Figure 10-3

( S2 ) x2

CD Player Unit

Figure 10-6

– 10 –

CD-C449W/K449W

Screw driver

Woofer

Woofer

Net

(A1)x1

Baffle Board

(A2)x1

Tweeter

Tweeter

Super

Tweeter

(A5)x2

ø3x10mm

(A3)x2

ø3x10mm

(A4)x4

ø4x16mm

( U1 ) x4
ø3 x12mm

( V1 ) x1
ø2.6 x10mm

Shift Lever

CD Changer
Mechanism

CD Player Base

CD Mechanism

Be careful when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.

Figure 11-1

CP-C449

STEP REMOVAL

1 Front Speaker 1. Net.......................... (A1) x1 11-2

CP-C449

PROCEDURE

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

3. Screw ..................... (A3) x2

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

5. Screw ..................... (A5) x2

FIGURE

Figure 11-2

– 11 –

CD-C449W/K449W

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3,15,16,17 and 19 of the disassembly
method to remove the CD mechanism.

How to remove the loading motor
(See Fig. 12-1)

1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.

Loading / Up
/ Down Motor

Motor
PWB

( A1 ) x2
ø2.6 x5mm

Figure 12-1

How to remove the pickup (See Fig. 12-2)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).

3. Remove the pickup.

Note

After removing the connector for the optical pickup fromthe

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

( B1 ) x2
ø2.6 x6mm

Shaft
( B2 ) x1

Stop Washer
( B3 ) x1

Pickup

CD Mechanism
Gear
( B4 ) x1

Figure 12-2

– 12 –

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Torque Meter

Tape 1

Play: TW-2111 30 to 60 g. cm 30 to 100 g.cm
Fast forward: TW-2231 — 50 to 100 g.cm
Rewind: TW-2231 — 50 to 100 g.cm

• Tape Speed

Test Tape

Normal MTT-111 VRM01 3,000 ± Speaker
speed 30 Hz terminal

Adjusting

Point

Specified Value

Tape 2: Over 80 g

Specified Value

Specified

Value

Tape 2

Instrument

Connection

(Load
resistance:
8 ohms)

CD-C449W/K449W

TUNER SECTION

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

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

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

Coverage 1.1 ± 0.1 V
SW1 Band — 3.2 MHz (fL): T307 *2

Coverage 2.0 ± 0.1V
SW1 Band — 7.3 MHz (fH): TC305 *2

Coverage 7.7 ± 0.2 V
SW2 Band — 9.5 MHz (fL): T308 *2

Coverage 2.1 ± 0.1V
SW2 Band — 21.85 MHz (fH): TC304 *2

Coverage 7.7 ± 0.2V
MW 990 kHz 990 kHz T302 *1

Tracking
SW1 3.9 MHz 3.9 MHz (fL): T303 *1

Tracking
SW1 7.1 MHz 7.1 MHz (fH): TC303 *1

Tracking
SW2 11.65 MHz 11.65 MHz (fL): T304 *1

Tracking
SW2 21.45 MHz 21.45 MHz (fH): TC302 *1

Tracking

Frequency

Frequency

Display

Setting/

Adjusting

Parts

Instrument

Connection

TAPE MECHANISM PWB

VRM01

TAPE

FAS
SW

Figure 13

SPEED

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

– 13 –

CD-C449W/K449W

• FM RF

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

Test Stage

Band — 87.5 kHz (fL): LT02 *1
Coverage 3.7 ± 0.1 V

RF 98 MHz 98 MHz LT01 *2

*1. Input: Antenna, Output: TP301
*2. Input: Anetnna, Output: Speaker Terminal

Frequency

10 - 30 dB

Frequency

Display

• Setting the Test Mode

Keeping the PAUSE button and TUNER button pressed, turn
on POWER. Then, the frequency is initially set in the memory
as shown in Table. Call it with the PRESET button to use it for
adjustment and check of tuner circuit.

Preset

No.

21 ~ 40

FM Preset

1 87.50 MHz 6 531 kHz 11 3.2 MHz 16 9.5 MHz
2 108.00 MHz 7 1,602 kHz 12 7.3 MHz 17 21.85MHz
3 90.00 MHz 8 603 kHz 13 3.9 MHz 18 11.65 MHz
4 106.00 MHz 9 1,404 kHz 14 7.1 MHz 19 21.45 MHz
5 98.00 MHz 10 990 kHz 15 5.06 MHz 20 15.1 MHz

No.

MW

Preset

No.

Setting/

Adjusting

Parts

SW1

Instrument

Connection

Preset

No.

SW2

• FM Detection

Signal generator: 10.7 MHz, FM sweep

Test Stage

IF 10.7 MHz 98 MHz TT01 *1

*1. Input: Antenna, Output: TP301
*2. Input: Anetnna, Output: Speaker Terminal

• FM Mute Level

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

Frequency Adjusting

98.00 MHz 98.00 MHz VR351 *1 Input: Antenna
(25 dBµV) Output: Speaker

*1. Adjust so that an output signal appears.

Frequency

Frequency

Display

Frequency

Display

Setting/

Adjusting

Parts

(Turn the
core of trans­former TT01
fully counter­clock wise)

Parts

Instrument

Connection

Instrument

Connection

Terminal

R357

TUNER PWB

T351

AM IF

IC303

TP302

VR351

FM Mute
Level

fL fH

SW2
Coverage

SW1 Band
Coverage

fL fH

T307 TC305

T308 TC304

FM Band
Coverage

LT02

T306

MW Band
Coverage

TT01

TP301

FM IF FM RF

LT01

SW2 Tracking

fH fL

T304TC302

T303TC303

T302

MW
Tracking

SO301
ANTENNA
TERMINAL

fH fL

SW1
Tracking

Figure 14 ADJUSTMENT POINTS

– 14 –

TEST MODE

• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test

• TEST mode

Function — CD test mode

Setting of TEST mode
Indication of CD TST mode (Fig. 15-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.

<MEMORY>
LASER ON

<MEMORY>
Tracking on the spot.
SERVO OFF PLAY

<MEMORY>
Tracking on the spot.
SERVO ON PLAY

IL is not performed.

CD-C449W/K449W

<STOP>

STOP

<PLAY> key input

TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9

Press <STOP> key.

Stop

<Disc Number 3> key: Track 15

Note:

Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.
VOL. --- Last memory

BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF

Canceling method - POWER OFF

Figure 15-1

CD SECTION

Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.

• Automatic adjustment item

1. Focus offset (Fig. 15-2)

2. Tracking offset (Fig. 15-3)

3. E/F balance (tracking error balance) (Fig. 15-4)

4. RF level AGC function (HF level: constant)

5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,

each disc is played back using the optimal settings.

0.1s

0.50 V
IC1 20 FE

0.1s

0.50 V
IC1 7 TE

FOCUS
OFF-SET
ADJUST

TRACKING
OFF-SET
ADJUST

1
2

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Figure 15-2

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TO

TE

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Figure 15-4

– 15 –

Figure 15-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

CD-C449W/K449W

(Continued)

Ordinary stereo sound

Listening area
(Listening range with good stereo fidelity)

3D SURROUND

SRS

MODE

PASS

■SRS (●) 3D SURROUND

About SRS (●) 3D surround:

SRS is a breakthrough technology that creates 3-dimensional
sound by processing sound signals based on the human auditory
system. It produces real depth and localization of the sound
image which cannot be accomplished by ordinary stereo.
SRS only requires two speakers.

SRS (●) 3D surround effects:

● Live performance atmosphere

(Simulates a live concert atmosphere)

● The localization of various musical sources is quite clear.
(The positions of the musical instruments and singers are very
clear.)

● Reproduction of depth
(Sounds from the front and back of an orchestra can be ident­ified easily.)

● Expansion of the sound field
(The sound image is spread out over a wide area.)

Selecting the 3D surround mode:

When the sound source is in stereo, you can select from any of
5 different 3D surround effect.

1 Select any desired audio source and begin playback.
2 To hear the 3D surround effect, press the SRS MODE button.

● "SRS (●)" will appear.

Wide listening area
(Stereo music can be heard anywhere in the room.)

SURROUND
MODE

MODE-1

MODE-2

MODE-3

Effect from each mode

You will enjoy a sound image that pro­duces an intimate sound field. (as in
a medium-size hall)

This setting gives you a maximum
sound field as music comes out be­yond the speakers. (as in a large,
domed arena)

This setting is great for live recording
and vocal music.

When the SRS MODE button is pressed, the current mode setting
will be displayed. To change to a different mode, press the SRS
MODE button repeatedly.

● "PASS" will not be displayed in remote control operation.

MODE-1 MODE-2 MODE-3 MODE-4 MODE-5 PASS

Notes:

● The 3D SURROUND effect will not work on a monaural sound
source.

● When the 3D surround mode is being used, the equalizer will
be set to FLAT.

To cancel the 3D surround effect:

(Main unit operation)

Press the SRS MODE button repeatedly to select "PASS".

(Remote control operation)

Press the PASS button.

MODE-4

MODE-5

You will hear more vocals in an inti­mate sound field. (as at a live music
performance)

This setting greatly increases the
amount of vocals or centre sounds in
a recording. (as in a small club)

– 16 –

NOTES ON SCHEMATIC DIAGRAM

FRONT

VIEW

• Resistor:
To differentiate the units of resistors, such 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
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.

• 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

• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.

REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION

SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW991 VOLTAGE SELECTOR 230-240V
SWD1 VOLUME JOG ON—OFF
SWD2 JOG ON—OFF
SWD3 X-BASS ON—OFF
SWD7 SOFT ON—OFF
SWD8 VOCAL ON—OFF
SWD9 HAVY-2 ON—OFF
SWD10 HAVY-1 ON—OFF
SWD11 FLAT ON—OFF
SWD12 TUNING UP/CUE ON—OFF
SWD13 STOP ON—OFF
SWD14 NORMAL EDIT ON—OFF
SWD15 HIGH EDIT ON—OFF
SWD16 REC/PAUSE ON—OFF
SWD17 F-PLAY ON—OFF
SWD18 SRS/DEMO ON—OFF
SWD21 BAL RIGHT ON—OFF
SWD22 BAL LEFT ON—OFF
SWD30 TUNING DOWN/REWIND ON—OFF
SWD31 CD PAUSE ON—OFF

FRONT

VIEW

• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas­sis with no signal given.

1. In the tuner section,

( ) indicates AM
< > indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.

( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• 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.

SWD32 REVERSE MODE ON—OFF
SWD33 R-PLAY ON—OFF
SWD34 CLOCK ON—OFF
SWD35 MEMORY ON—OFF
SWD36 TIMER ON—OFF
SWD37 SLEEP ON—OFF
SWD38 CLEAR ON—OFF
SWD39 VIDEO/AUX 1 ON—OFF
SWD40 VIDEO/AUX 2 ON—OFF
SWD41 TAPE 1/2 ON—OFF
SWD42 TUNER/BAND ON—OFF
SWD43 CD ON—OFF
SWD48 POWER ON—OFF
SWD49 KARAOKE (CD-K449W Only) ON—OFF
SWD50 DISC 1 ON—OFF
SWD51 DISC 2 ON—OFF
SWD52 DISC 3 ON—OFF
SWD53 DISC SKIP ON—OFF
SWD54 OPEN/CLOS ON—OFF
SWF2 SPAN SELECTOR 50/9
SWM3 REC FWD ON—OFF
SWM4 REC RVS ON—OFF
SWM5 F.A.S ON—OFF
SWM6 CAM ON—OFF

FRONT

VIEW

CD-C449W/K449W

FRONT VIEW

KTA1266 GR
KTA1270Y
KTA1271 Y
KTA1273 Y
KTA1268 GR
KTC3199 GR
KTC3203 Y

E C B

(S)(G) (D)

(1) (2) (3)

KRA107 M
KRA102 M
KRC102 M
KRC104 M
KRC107 M
2SC535 C
2SC1845 F

2SC2878 A
2SC2878 B
2SC2236 Y
2SD468 C
2SK246 GR
KTC3200 GR

Figure 17 TYPES OF TRANSISTOR AND LED

2SD2012
2SB1375

– 17 –

B C E
(D)(G)(S)
(3) (2) (1)

SLR325MG
SLR325VR
KL052UL
SLR505MC
LMKD515B

KV1236Z23