CD-C449W/K449W
SERVICE MANUAL
●SRS, the SRS Logo (●) and the Sound Retrieval System are registered trademarks of SRS Labs, Inc. in the United States.
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 original condition and only parts identical to those specified be used.
CONTENTS |
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Page |
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 |
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SECTION |
CD-C449W |
CD-K449W |
KARAOKE CIRCUIT
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SHARP CORPORATION |
This document has been published to be used |
for after sales service only. |
|
– 1 – |
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 |
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Material: GaAIAs |
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Wavelength: 780 nm |
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Emission Duration: continuous |
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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
SPECIFICATIONS
CD-C449W/K449W
● General
Power source: |
AC 110/127/220/230-240 V, |
Power consumption: |
50/60 Hz |
120 W |
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Dimensions: |
Width; 270 mm (10-5/8") |
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Height; 316 mm (12-1/2") |
Weight: |
Depth; 343 mm (13-1/2") |
9.2 kg (20.3 lbs.) |
● Cassette deck section
Frequency response: |
50-14,000 Hz (Normal tape) |
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Signal/noise ratio: |
55 |
dB (TAPE 1, playback) |
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50 |
dB (TAPE 2, recording/ |
Wow and flutter: |
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playback) |
0.15 % (WRMS) |
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● Amplifier section
Output power: |
PMPO; 1200 W |
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MPO; 240 W (120 W + 120 W) |
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(10 % T.H.D.) |
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RMS; 150 W (75 W + 75 W) |
Output terminals: |
(10 % T.H.D.) |
Speakers; 8 ohms |
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Headphones; 16-50 ohms |
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(recommended; 32 ohms) |
Input terminals: |
CD digital output (optical) |
Video/Auxiliary (audio signal) |
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1/2; 500 mV/47 kohms |
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Microphone 1/2; 1 mV/4.7 kohms |
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(CD-K449W only) |
● Tuner section
Frequency range: |
FM; 88 - 108 MHz |
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SW2; 9.5 |
- 21.85 MHz |
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SW1; 3.2 |
- 7.3 MHz |
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MW; 531 - 1,602 kHz |
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● Compact disc player section
Type: |
3-disc multi-play compact disc |
Signal readout: |
player |
Non-contact, 3-beam semi- |
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D/A converter: |
conductor laser pickup |
1-bit D/A converter |
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Frequency response: |
20 - 20,000 Hz |
Dynamic range: |
90 dB (1 kHz) |
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CP-C449 |
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● Speaker section |
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Type: |
3-way type [130 mm (5-1/8") |
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woofer, 50 mm (2") tweeter and |
Maximum input |
super tweeter] |
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power: |
150 W |
Impedance: |
8 ohms |
Dimensions: |
Width; 220 mm (8-11/16") |
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Height; 316 mm (12-1/2") |
Weight: |
Depth; 284 mm (11-3/16") |
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 |
AQCCJ0003AW00 |
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QACCE0008AW00
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
– 3 –
CD-C449W/K449W
SPECIFICATIONS
CD-C449W/K449W
● General
Power source: |
AC 110/127/220/230-240 V, |
Power consumption: |
50/60 Hz |
120 W |
|
Dimensions: |
Width; 270 mm (10-5/8") |
|
Height; 316 mm (12-1/2") |
Weight: |
Depth; 343 mm (13-1/2") |
9.2 kg (20.3 lbs.) |
● Cassette deck section
Frequency response: |
50-14,000 Hz (Normal tape) |
|
Signal/noise ratio: |
55 |
dB (TAPE 1, playback) |
|
50 |
dB (TAPE 2, recording/ |
Wow and flutter: |
|
playback) |
0.15 % (WRMS) |
||
● 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) |
Output terminals: |
(10 % T.H.D.) |
Speakers; 8 ohms |
|
|
Headphones; 16-50 ohms |
|
(recommended; 32 ohms) |
Input terminals: |
CD digital output (optical) |
Video/Auxiliary (audio signal) |
|
|
1/2; 500 mV/47 kohms |
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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 |
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● Compact disc player section
Type: |
3-disc multi-play compact disc |
Signal readout: |
player |
Non-contact, 3-beam semi- |
|
D/A converter: |
conductor laser pickup |
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 |
Maximum input |
super tweeter] |
|
|
power: |
150 W |
Impedance: |
8 ohms |
Dimensions: |
Width; 220 mm (8-11/16") |
|
Height; 316 mm (12-1/2") |
Weight: |
Depth; 284 mm (11-3/16") |
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 |
AQCCJ0003AW00 |
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QACCE0008AW00
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
– 3 –
CD-C449W/K449W
CD-C449W/K449W
■Front panel
1.(CD) Disc Tray
2.(CD) Disc Number Select Buttons
3.(CD) Disc Skip Button
4.(CD) Open/Close Button
NAMES OF PARTS
1 |
2 |
3 |
4 |
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5.(CD) Disc Number Indicators
6.SRS Indicator
7.(TAPE 2) Direction Indicators
8.(TAPE 2) Reverse Mode Indicator
9.(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 (TAPE 2) Fast Wind Button (TUNER) Tuning Down Button
46.(TAPE 2) Reverse Play Button
47.(CD) Play/Repeat Button (TAPE 1) Play Button
(TAPE 2) Forward Play Button
48.(CD) Track Up/Cue Button (TAPE 2) Fast Wind Button (TUNER) Tuning Up Button
49.Editing Speed Selector Buttons
5 |
6 |
7 |
8 |
9 |
10 11 12 |
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13 |
1415 |
16 |
17 |
18 |
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19 20 21 |
22 |
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23 |
24 |
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25 26 |
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27 28 29 30 31 32 33
34 35 36 37 38 39 40 41
42 43 44 45 46 47 48 49
– 4 –
1.(TAPE 1) Cassette Compartment
2.(TAPE 2) Cassette Compartment
■Rear panel
1.CD Digital Output Socket
2.Video/Auxiliary (Audio Signal) Input Sockets
3.Span Selector Switch
4.FM 75 Ohms Aerial Terminal
5.Aerial Earth Terminal
6.SW1/SW2/MW Aerial Terminal
7.AC Voltage Selector
8.AC Power Lead
9.Speaker Terminals
CP-C449
■Speaker section
1.Super Tweeter
2.Tweeter
3.Woofer
4.Bass Reflex Ducts
5.Speaker Terminals
CD-C449W/K449W
1 2
1 2 3
4
5
6
7
8
9
1
2
5
3
4
– 5 –
CD-C449W/K449W
■Remote control
1.Remote Control Transmitter LED
●CD control section
2.Disc Number Select Buttons
3.Track Down/Review Button
4.Track Up/Cue Button
5.Disc Skip Button
6.Play/Repeat Button
7.Stop Button
8.Memory Button
9.Clear Button
10.Random Button
11.Pause Button
●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
(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
1
2 |
5 |
3 |
6 |
4 |
7 |
8 |
9 10 11 |
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12 |
13 |
15 |
16 |
14 |
17 |
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18 |
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24 |
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19 |
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25 |
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20 |
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21 |
26 |
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22 |
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23 |
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– 6 –
CD-C449W/K449W
OPERATION MANUAL
SETTING THE CLOCK
In this example, the clock is set for the 24-hour (0:00) system.
Jog dial
CLOCK
ON/STAND-BY
MEMORY |
TUNING |
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( |
) |
2
3
4
0:00 
AM 12:00
AM 0:00
5
6
7
8
9
1 Press the ON/STAND-BY button to enter the stand-by mode.
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 display will appear.
(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-hour display will 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-clock- wise, 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:
Press the MEMORY button.
Perform steps 6 - 9 above.
When the unit is on:
Press the CLOCK button.
Within 5 seconds, press the MEMORY button.
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:
Perform steps 1 - 2 in the section "RESETTING THE MICROCOMPUTER", on page 28.
Perform steps 1 - 9 above.
– 7 –
■ FM/MW interval (span) |
(Continued) |
The International Telecommunication Union (ITU) has established 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.
SPAN
SELECTOR
FM/MW
(kHz)
50/9 100/10
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.
– 8 –
RESETTING THE MICROCOMPUTER
FLAT
ON/STAND-BY
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.
●2 "AA" size batteries (UM/SUM- 3, R6, HP-7 or similar)
+
-
+
-
0.2 m - 6 m (8" - 20')
15
15
■ Remote control
● When inserting or removing the batteries, push them towards the battery terminal.
●Installing the batteries incorrectly may cause the unit to malfunction.
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 damage 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 interfere with operation. Change the lighting or the direction of the unit.
●Keep the remote control away from moisture, excessive heat, shock, and vibrations.
C449W/K449W-CD
CD-C449W/K449W
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 |
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PROCEDURE |
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FIGURE |
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1 |
Top Cabinet |
1. |
Screw ..................... |
(A1) x4 |
9-1 |
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2 |
Side Panel |
1. |
Screw ..................... |
(B1) x8 |
9-1 |
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(Left/right) |
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3 |
CD Player Unit/ |
1. |
Turn on the power supply, |
9-2 |
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CD Tray Cover |
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open the disc tray, take out |
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the CD cover, and close. |
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(Note 1) |
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2. |
Hook ....................... |
(C1) x3 |
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3. |
Hook ....................... |
(C2) x2 |
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4. |
Screw ..................... |
(C3) x1 |
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5. |
Socket .................... |
(C4) x3 |
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4 |
Tuner PWB |
1. |
Socket .................... |
(D1) x1 |
10-1 |
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2. |
Screw ..................... |
(D2) x5 |
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5 |
Rear Panel |
1. |
Screw ..................... |
(E1) x11 |
9-2 |
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10-1 |
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................................... |
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6 |
Main PWB |
1. |
Flat cable ............... |
(F1) x2 |
10-1 |
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2. |
Flat wire ................. |
(F2) x3 |
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3. |
Socket ...................... |
(F3) x3 |
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4. |
Screw ....................... |
(F4) x3 |
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7 |
Karaoke PWB |
1. |
Screw ..................... |
(G1) x2 |
10-2 |
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(CD-K449W only) |
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8 |
Front Panel |
1. |
Flat wire ................. |
(H1) x1 |
10-2 |
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2. |
Screw...................... |
(H2) x2 |
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9 |
Power Amp. PWB |
1. |
Socket .................... |
(J1) x2 |
10-2 |
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2. |
Screw ..................... |
(J2) x6 |
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10 |
Power Supply PWB |
1. |
Screw ..................... |
(K1) x6 |
10-3 |
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11 |
Display PWB |
1. |
Knob ....................... |
(L1) x2 |
10-4 |
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2. |
Nut .......................... |
(L2) x1 |
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3. |
Screw ..................... |
(L3)x12 |
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12 |
CD Switch PWB |
1. |
Screw ..................... |
(M1) x3 |
10-4 |
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13 |
Headphones PWB |
1. |
Screw ..................... |
(N1) x1 |
10-4 |
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14 |
Tape Mechanism |
1. Screw ..................... |
(P1) x6 |
10-4 |
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15 |
Turntable |
1. |
Screw ..................... |
(Q1) x1 |
10-5 |
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2. |
Cover ..................... |
(Q2) x1 |
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16 |
Disc Tlay |
1. |
Screw ..................... |
(R1) x2 |
10-5 |
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2. |
Guide ..................... |
(R2) x2 |
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17 |
CD Servo PWB |
1. |
Screw ..................... |
(S1) x1 |
10-6 |
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(Note2) |
2. |
Socket .................... |
(S2) x4 |
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18 |
CD Changer |
1. |
Screw ..................... |
(T1) x4 |
11-1 |
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Mechanism |
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19 |
CD Mechanism |
1. Screw ..................... |
(U1) x1 |
11-1 |
||
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|
|
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.
CD-C477W/K449W
( A1 ) x2 |
Top Cabinet |
ø3 x12mm |
|
( A1 ) x2
ø3 x12mm
( B1 ) x2 ø3 x8mm
Side Panel (Left)
Side Panel (Right)
( B1 ) x4 |
|
( B1 ) x2 |
ø3 x8mm |
Rear Panel |
|
|
ø3 x8mm |
Figure 9-1
|
(C2) x1 |
CD Tray Cover |
Hook |
|
|
( C1) x3 |
|
( C4 ) x2 |
Pull |
|
|
1 |
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||
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||
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1 |
CD Player |
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2 |
Unit |
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( C2 ) x1 |
|
( C4 ) x1 |
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Front Panel |
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|
Main PWB |
( E1 ) x10 |
|
Tuner PWB |
|
ø3 x8mm |
|
|
|
|
( C3 ) x1 |
Rear Panel |
ø3 x8mm |
|
Figure 9-2
LOCK
LEVER
Figure 9-3
– 9 –
CD-C449W/K449W
|
|
(F4) x2 |
(E1) x1 |
|
ø3x10mm |
(F2) x1 |
Front Panel |
|
ø3 x10mm |
|
|
|
(F3) x2 |
(F3) x2 |
|
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|
(F2) x2 |
|
|
CD-K449W |
(F1) x1 |
|
Only |
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|
(F4) x1 |
Rear |
|
ø3x10mm |
Panel |
(D1) x1 |
|
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Main PWB |
(D2) x1 |
|
|
ø3x10mm |
|
(D2) x4 |
|
Tuner PWB |
|
|
ø3 x10mm |
|
Figure 10-1
(G1)x2
ø3x10mm
CD-K449W |
Front Panel |
|
Only |
Karaoke |
|
|
PWB |
|
|
(G1)x1 |
( J1 ) x2 |
|
ø3x10mm |
|
|
( H1 ) x1 |
|
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|
(J2)x5 |
|
|
ø3x10mm |
|
|
( J2 ) x1 
( H2 ) x1 ø3x10mm 
ø3x10mm
Power Amp. PWB
Figure 10-2
(K1)x4
ø4x8mm (K1)x1 
ø3x10mm
Power Supply PWB
(K1)x1 ø3x8mm 
Figure 10-3
CD Switch PWB |
(L1)x2 |
|
|
||
Front Panel |
Washer |
|
|
||
(M1)x3 |
(L2)x1 |
|
Display |
||
ø3x10mm |
||
PWB |
||
|
||
(L3)x12 |
Headphones |
|
ø3x10mm |
PWB |
|
|
Open |
|
Tape Mechanism |
(N1)x1 |
|
(P1)x6 |
ø3x10mm |
|
Cassette |
||
ø3x10mm |
||
Holder (Left/Right) |
||
Lug Wire |
Figure 10-4
( Q1 ) x1 ø3 x10mm 
( Q2 ) x1
Turntable
( R1 ) x1 |
|
Disc Tray |
|
|
|
ø3 x10mm |
|
|
( R2 ) x1 |
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( R1 ) x1 |
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|
ø3 x10mm |
CD Player Unit |
( R2 ) x1 |
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|
Figure 10-5 |
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|
( S1 ) x1 |
|
|
ø3 x10mm |
( S2 ) x2 |
|
CD Servo PWB |
|
|
|
( S2 ) x2
CD Player Unit
Figure 10-6
– 10 –
( 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 |
|
PROCEDURE |
|
FIGURE |
|
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|
1 |
Front Speaker |
1. Net .......................... |
(A1) x1 |
11-2 |
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2. |
Front Panel ............ |
(A2) x1 |
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3. |
Screw ..................... |
(A3) x2 |
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4. |
Screw ..................... |
(A4) x4 |
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5. |
Screw ..................... |
(A5) x2 |
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|
CD-C449W/K449W
CP-C449
Tweeter
Baffle Board
(A2)x1
Net (A1)x1
Woofer
Screw driver
Super
Tweeter
(A5)x2
ø3x10mm
Tweeter
(A3)x2
ø3x10mm
(A4)x4
ø4x16mm
Figure 11-2
Woofer
– 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 |
Stop Washer |
|
( B3 ) x1 |
||
ø2.6 x6mm |
||
|
Pickup
Shaft |
CD Mechanism |
|
Gear |
||
( B2 ) x1 |
||
( B4 ) x1 |
||
|
Figure 12-2
– 12 –
CD-C449W/K449W
ADJUSTMENT
MECHANISM SECTION
∙ Driving Force Check
Torque Meter |
Specified Value |
|
|
Play: TW-2412 |
Tape 1: Over 80 g |
|
Tape 2: Over 80 g |
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|
∙ Torque Check
Torque Meter |
Specified Value |
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Tape 1 |
Tape 2 |
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Play: TW-2111 |
30 to 60 g. cm |
30 to 100 g.cm |
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Fast forward: TW-2231 |
— |
50 to 100 g.cm |
|
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|
Rewind: TW-2231 |
— |
50 to 100 g.cm |
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∙ Tape Speed |
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|
Test Tape |
Adjusting |
Specified |
Instrument |
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|
Point |
Value |
Connection |
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Normal |
MTT-111 |
VRM01 |
3,000 ± |
Speaker |
speed |
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30 Hz |
terminal |
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(Load |
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resistance: |
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8 ohms) |
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TAPE MECHANISM PWB
TUNER SECTION
fL: Low-range frequency fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage |
Frequency |
Frequency |
|
Setting/ |
Instrument |
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Display |
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Adjusting |
Connection |
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Parts |
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IF |
450 kHz |
|
1,602 kHz |
|
T351 |
*1 |
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MW Band |
— |
|
531 kHz |
|
(fL): T306 |
*2 |
Coverage |
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1.1 ± 0.1 V |
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SW1 Band |
— |
|
3.2 MHz |
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(fL): T307 |
*2 |
Coverage |
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2.0 ± 0.1V |
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SW1 Band |
— |
|
7.3 MHz |
|
(fH): TC305 |
*2 |
Coverage |
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7.7 ± 0.2 V |
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SW2 Band |
— |
|
9.5 MHz |
|
(fL): T308 |
*2 |
Coverage |
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2.1 ± 0.1V |
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SW2 Band |
— |
|
21.85 MHz |
|
(fH): TC304 |
*2 |
Coverage |
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7.7 ± 0.2V |
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MW |
990 kHz |
|
990 kHz |
|
T302 |
*1 |
Tracking |
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SW1 |
3.9 MHz |
|
3.9 MHz |
|
(fL): T303 |
*1 |
Tracking |
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SW1 |
7.1 MHz |
|
7.1 MHz |
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(fH): TC303 |
*1 |
Tracking |
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SW2 |
11.65 MHz |
11.65 MHz |
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(fL): T304 |
*1 |
|
Tracking |
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SW2 |
21.45 MHz |
21.45 MHz |
|
(fH): TC302 |
*1 |
|
Tracking |
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*1. Input: Antenna, |
Output: TP302 |
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*2. Input: Anetnna, |
Output: TP301 |
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|||
VRM01
TAPE FAS SPEED SW
Figure 13
– 13 –
CD-C449W/K449W
• FM RF
Signal generator: 1 kHz, 40 kHz dev, FM modulated
Test Stage |
Frequency |
Frequency |
|
Setting/ |
Instrument |
|
|
|
|
Display |
|
Adjusting |
Connection |
|
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|
|
Parts |
|
Band |
— |
|
87.5 kHz |
|
(fL): LT02 |
*1 |
Coverage |
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|
3.7 ± 0.1 V |
|
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RF |
98 MHz |
|
98 MHz |
|
LT01 |
*2 |
|
10 - 30 dB |
|
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|
|
*1. Input: Antenna, |
Output: TP301 |
|
|
|||
*2. Input: Anetnna, |
Output: Speaker Terminal |
|
||||
• 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 |
|
FM |
Preset |
MW |
Preset |
SW1 |
Preset |
SW2 |
||||
No. |
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No. |
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No. |
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No. |
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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 |
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21 ~ 40 |
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• FM Detection
Signal generator: 10.7 MHz, FM sweep
Test Stage |
Frequency |
Frequency |
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Setting/ |
Instrument |
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Display |
|
Adjusting |
Connection |
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Parts |
|
IF |
10.7 MHz |
|
98 MHz |
|
TT01 |
*1 |
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(Turn the |
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core of trans- |
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former TT01 |
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fully counter- |
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clock wise) |
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*1. Input: Antenna, |
Output: TP301 |
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*2. Input: Anetnna, |
Output: Speaker Terminal |
|
||||
• FM Mute Level
Signal generator: 1kHz, 40 kHz dev., FM modulated
Frequency |
Frequency |
Adjusting |
Instrument |
|
Display |
Parts |
Connection |
|
|
|
|
98.00 MHz |
98.00 MHz |
VR351 *1 |
Input: Antenna |
(25 dBµV) |
|
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Output: Speaker |
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Terminal |
|
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|
*1. Adjust so that an output signal appears.
TUNER PWB
|
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|
FM Band |
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Coverage FM IF FM RF |
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SW1 Band |
LT02 |
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TT01 |
LT01 |
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||||
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Coverage |
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||||
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|
fL |
fH |
|
SW2 Tracking |
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||
T351 |
VR351 |
|
TP301 |
fH |
|
fL |
SO301 |
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|||
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TC302 T304 |
ANTENNA |
||
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T307 TC305 |
TERMINAL |
||||
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AM IF |
FM Mute |
|
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TC303 |
T303 |
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Level |
T308 TC304 |
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||||
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IC303 |
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T302 |
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T306 |
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TP302 |
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fH fL |
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R357 |
fL |
fH |
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SW2 |
|
MW Band |
MW |
|
SW1 |
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||||
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Tracking |
|
|||
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Coverage |
Coverage |
Tracking |
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|||
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|||||
Figure 14 ADJUSTMENT POINTS
– 14 –
CD-C449W/K449W
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. |
) or ( |
) key. |
|
IL is not performed. |
||||||
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|||||||||||
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|||||||
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|||||
The pickup can be moved by using the ( |
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|||||||||
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|||||||||
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|
<MEMORY> |
|
<MEMORY> |
|
<MEMORY> |
<STOP> |
||||
|
|
LASER ON |
|
Tracking on the spot. |
|
|
Tracking on the spot. |
|
STOP |
||
|
|
|
|
SERVO OFF PLAY |
|
|
SERVO ON PLAY |
|
|
||
|
|
<PLAY> key input |
|
TOC. IL is performed, and the ordinary PLAY is performed. |
|
Press <STOP> key. |
|
Stop |
||||
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||||||||
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If the following key is pressed during PLAY, it is possible |
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|||
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to specify directly any Track No. |
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<Disc Number 1> key: Track 4 |
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<Disc Number 2> key: Track 9 |
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<Disc Number 3> key: Track 15 |
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Note: |
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|
||
Only in STOP state it is possible to slide the pickup with the ( |
) or ( |
) key. |
|
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||||||
VOL. --- |
Last memory |
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BAL. |
CENTER |
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||||
R.GEQ. |
--- FLAT |
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X-BAS --- |
OFF |
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||
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
FOCUS
OFF-SET
ADJUST
0.1s
0.50 V
IC1 7 TE 
TRACKING OFF-SET
1 ADJUST
|
2 |
|
|
Figure 15-2 |
|
200 ms |
TRACKING/ |
|
1V/diV |
ERROR |
|
IC 1 15 |
BARANCE |
|
TO |
1 ADJUST |
|
|
||
200 ms |
|
|
1V/diV |
|
|
IC 1 7 |
2 |
|
TE |
||
|
||
|
Figure 15-4 |
10ms 0.50 V
IC1 20 FE
10ms 0.50 V IC1 7 TE
Figure 15-3
Enlarged
View
TRACKING
OFF-SET 1 ADJUST
2
– 15 –
CD-C449W/K449W |
|
|
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|
|
(Continued) |
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|
■ SRS (●) 3D SURROUND |
|
|
||||
|
About SRS (●) 3D surround: |
|
|
|
|||
SRS |
SRS is a |
breakthrough technology that creates 3-dimensional |
|||||
sound by processing sound signals based on the human auditory |
|||||||
MODE |
|||||||
system. It produces real depth and localization of the sound |
|||||||
|
|||||||
PASS |
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) |
|
|
||||
Ordinary stereo sound |
● The localization of various musical sources is quite clear. |
||||||
(The positions of the musical instruments and singers are very |
|||||||
|
|||||||
|
clear.) |
|
|
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|
|
● Reproduction of depth |
|
|
|
|||
|
(Sounds from the front and back of an orchestra can be ident- |
||||||
|
ified easily.) |
|
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|
||
|
● 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. |
|
|
|
|||
Listening area |
1 Select any desired audio source and begin playback. |
||||||
(Listening range with good stereo fidelity) |
|||||||
3D SURROUND |
2 To hear the 3D surround effect, press the SRS MODE button. |
||||||
● "SRS (●)" will appear. |
|
|
|
||||
|
|
|
|
||||
|
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. |
|
|
|
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MODE-1 |
MODE-2 |
MODE-3 |
MODE-4 |
MODE-5 |
PASS |
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Notes: |
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● The 3D SURROUND effect will not work on a monaural sound |
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source. |
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Wide listening area |
● When the 3D surround mode is being used, the equalizer will |
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(Stereo music can be heard anywhere in the room.) |
be set to FLAT. |
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SURROUND |
Effect from each mode |
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MODE |
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MODE-1 |
You will enjoy a sound image that pro- |
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duces an intimate sound field. (as in |
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a medium-size hall) |
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MODE-2 |
This setting gives you a maximum |
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sound field as music comes out be- |
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yond the speakers. (as in a large, |
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domed arena) |
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MODE-3 |
This setting is great for live recording |
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and vocal music. |
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MODE-4 |
You will hear more vocals in an inti- |
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mate sound field. (as at a live music |
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performance) |
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MODE-5 |
This setting greatly increases the |
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a recording. (as in a small club) |
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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.
– 16 –
CD-C449W/K449W
NOTES ON SCHEMATIC DIAGRAM
∙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.
∙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.
REF. NO |
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DESCRIPTION |
POSITION |
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SW1 |
OPEN/CLOSE |
ON—OFF |
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SW2 |
MECHA UP |
ON—OFF |
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SW3 |
DISC NUMBER |
ON—OFF |
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SW4 |
PICKUP IN |
ON—OFF |
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SW991 |
VOLTAGE SELECTOR |
230-240V |
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SWD1 |
VOLUME JOG |
ON—OFF |
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SWD2 |
JOG |
ON—OFF |
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SWD3 |
X-BASS |
ON—OFF |
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SWD7 |
SOFT |
ON—OFF |
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SWD8 |
VOCAL |
ON—OFF |
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SWD9 |
HAVY-2 |
ON—OFF |
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SWD10 |
HAVY-1 |
ON—OFF |
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SWD11 |
FLAT |
ON—OFF |
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SWD12 |
TUNING UP/CUE |
ON—OFF |
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SWD13 |
STOP |
ON—OFF |
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SWD14 |
NORMAL EDIT |
ON—OFF |
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SWD15 |
HIGH EDIT |
ON—OFF |
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SWD16 |
REC/PAUSE |
ON—OFF |
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SWD17 |
F-PLAY |
ON—OFF |
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SWD18 |
SRS/DEMO |
ON—OFF |
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SWD21 |
BAL RIGHT |
ON—OFF |
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SWD22 |
BAL LEFT |
ON—OFF |
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SWD30 |
TUNING DOWN/REWIND |
ON—OFF |
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SWD31 |
CD PAUSE |
ON—OFF |
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FRONT |
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VIEW |
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E C B |
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(S) (G) (D) |
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(1) (2) (3) |
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KTA1266 GR |
KRA107 M |
2SC2878 A |
KTA1270Y |
KRA102 M |
2SC2878 B |
KTA1271 Y |
KRC102 M |
2SC2236 Y |
KTA1273 Y |
KRC104 M |
2SD468 C |
KTA1268 GR |
KRC107 M |
2SK246 GR |
KTC3199 GR |
2SC535 C |
KTC3200 GR |
KTC3203 Y |
2SC1845 F |
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REF. NO |
DESCRIPTION |
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POSITION |
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SWD32 |
REVERSE MODE |
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ON—OFF |
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SWD33 |
R-PLAY |
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ON—OFF |
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SWD34 |
CLOCK |
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ON—OFF |
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SWD35 |
MEMORY |
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ON—OFF |
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SWD36 |
TIMER |
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ON—OFF |
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SWD37 |
SLEEP |
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ON—OFF |
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SWD38 |
CLEAR |
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ON—OFF |
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SWD39 |
VIDEO/AUX 1 |
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ON—OFF |
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SWD40 |
VIDEO/AUX 2 |
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ON—OFF |
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SWD41 |
TAPE 1/2 |
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ON—OFF |
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SWD42 |
TUNER/BAND |
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ON—OFF |
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SWD43 |
CD |
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ON—OFF |
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SWD48 |
POWER |
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ON—OFF |
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SWD49 |
KARAOKE (CD-K449W Only) |
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ON—OFF |
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SWD50 |
DISC 1 |
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ON—OFF |
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SWD51 |
DISC 2 |
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ON—OFF |
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SWD52 |
DISC 3 |
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SWD53 |
DISC SKIP |
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SWD54 |
OPEN/CLOS |
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ON—OFF |
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SWF2 |
SPAN SELECTOR |
50/9 |
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SWM3 |
REC FWD |
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ON—OFF |
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SWM4 |
REC RVS |
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ON—OFF |
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SWM5 |
F.A.S |
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ON—OFF |
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SWM6 |
CAM |
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ON—OFF |
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FRONT VIEW |
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FRONT |
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VIEW |
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FRONT |
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VIEW |
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B C E |
SLR325MG |
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(D) (G) (S) |
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(3) (2) (1) |
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SLR325VR |
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KV1236Z23 |
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2SD2012 |
KL052UL |
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2SB1375 |
SLR505MC |
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LMKD515B |
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Figure 17 TYPES OF TRANSISTOR AND LED
– 17 –
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