Panasonic SLSX-450-CP, SLSX-450-CPC, SLSX-450-P, SLSX-450-PC Service manual

Portable CD Player

SL-SX450P SL-SX450PC SL-SX451CP SL-SX451CPC

Colour

(S).......................Silver Type

ORDER No.AD0501002C1

Specification

●●●● Audio(CD-DA)

Sampling frequency: 44.1 kHz

No. ofchannels: 2 (left and right, stereo) Frequencyresponse: 20 Hz to 20,000 Hz

( + 0.5dB ~ -7dB)

Headphone outputlevel: RMS max. 6mW + 6mW/16 Ω

(adjustable)

●●●● Pickup Lightsource: Semiconductor laser Wavelength: 780 nm

●●●● MP3 Supported bit-rates

(Supports variable bit rates): Supported sampling frequency: 48 kHz / 44.1 kHz/32 kHz Maximum number ofitems

(total no. of albums and tracks): Maximum album levels: 100

●●●● General Power supply:

DC input (via AC adaptor, not included):

32 kbps to 320 kbps

(128 kbps is recommended)

999

DC 4.5V

Operational temperature range: 0°C-40°C

(32°F-104°F)

Playtime:

Using on a flat stable surface at 25 ° C (77 ° F), EQ is off, Hold is on, Anti-skip is on POS 1 (CD-DA), recommended bit rate (MP3: 128 kbps), and the Digital Re-master is off (MP3).Play time are in hours and approximate.

Batteries used:

2 alkaline batteries; MP3 disc....85h

CD-DA disc....50h

· The playtime maybe less depending on the operating conditions.

· Play time will be considerably reduced when playing CD-RW.

Dimensions (WxHxD): 135mmx23.8mmx135mm

(55/16”

Mass: 202g(7.1oz) (with batteries)

158g(5.6oz) (without batteries)

Note:

Specifications are subject to change without notice. Mass and dimensions are approximate.

Note on CD-R and CD-RW:

”x5

”)

SL-SX450P / SL-SX450PC / SL-SX451CP / SL-SX451CPC

(CD-DA/MP3 only) For CD-DA format, use a music disc and finalize The unit may not be able to play some discs due to the condition of the recording.

* A process performed after recording that enables CD-R / CD-RW players to play audio CD-R and CD-RW.

it after recording.

CONTENTS

Page Page

1 Precaution of Laser Diode 2 Accessories 3 Schematic Diagram Notes

4 Schematic Diagram

5 Replacement Parts List

1 Precaution of Laser Diode

5 9

CAUTION:

This unit utilizes a class 1 laser. Invisible laser radiation is emitted from the pickup lens when the unit is turned on:

1. Do not look directly into the pickup lens.

2. Do not use optical instruments to look at the pickup lens.

3. Do not adjust the preset variable resistor on the optical pickup.

4. Do not disassemble the optical pickup unit.

5. If the optical pickup is replaced, use the manufactures specified replacement pickup only.

6. Use of control or adjustments or performance of procedures other than those specified herin may result in hazardous radiation exposure.

2 Accessories

· Stereo headphones (For P area).........................1 pc.

(L0BAD0000177)

· Stereo earphones (For PC area).........................1 pc.

(L0BAB0000182)

For SL-SX451C Only

· Car power adaptor..............................................1 pc.

(SH-CDC12PEY)

· Car stereo cassette adaptor...............................1 pc.

(SHCDM10B1PYK)

3 Schematic Diagram Notes

Note:

●S201: Laser ON/OFF switch in “ON” position. (It turns “ON” with CD Lid.)

●S202: Rest switch in “OFF” position. (It turns “ON” when optical pickup comes to innermost periphery.)

●S310: Hold (HOLD) switch in “OFF” position.

●S821: Program play/ Digital Re-master/ Anti-

skip mode selection (MEMO) switch.

●S822: Play mode/ Album mode selection (MODE) switch.

●S823: Sound quality selection (EQ) switch.

●S824: Play/pause (

●S825: Stop/Turn off (

●S826, 827: Skip/search/ Album skip (

) switch.

●S828, 829: Volume control (VOL+,VOL -) switch.

· Components identified by

characteristics important for safety.

· When replacing any of components, be sure to use only

manufacture’s specified parts shown in the parts list.

· The supply part number is described alone in the

replacement parts.

· Signal line

· The voltage value and waveforms are the reference

voltage of this measured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of GND terminal (DC IN Jack). Accordingly, there may arise some errors in the voltage valuesandwaveforms depending upon the internal impedance of the tester or measuring unit.

Measurement conditions:

*( ).......CD playback mode (Test disc 1kHz, L+R, 0dB)

*No mark.......CD stop mode

Caution!!

· IC and LSI are sensitive to static electricity.

· Secondary trouble can be prevented by taking care

during repair.

· Cover the parts boxes made of plastics with aluminum

foil.

· Ground the soldering iron.

· Put a conductive mat on the work table.

· Do not touch the pins of IC or LSI with fingers directly.

: Positive voltage line. : Playback signal line.

) switch. ) switch.

mark have special

SL-SX450P / SL-SX450PC / SL-SX451CP / SL-SX451CPC

+ 6 hidden pages