Philips cd 480 482 service manual

Page 2

2-1

TECHNICAL DATA

Typical Audio Performance
- Number of Channels: 2

- Frequency Range: 2-20 000 Hz
- Output resistance: 200 Q

- Nominal load impedance: 100 kfl//100 pF

Power Supply

- Mains Voltage: see type plate at rear of player
- Mains Frequencies: 50 and 60 Hz
- Power Consumption: 15 W approx.

~ Amplitude Linearity: : 01 dB (20-20 000 HZ)

- Phase Linearity: :r 1.0° (20-20 000 Hz)

- Dynamic Range: 90 dB (20-20 000 Hz)

- SignaHo-NOIse Ratio: 96 :18 (20-20 000 Hz)
- Channel Separation: 98 dB (20-20 000 Hz)

Cabinet, general

- Safety Requirements: IEC

- Dimensions (wxhxd)

cabinet with tray closed: 420 x 75/81 x 280 mm approx.
cabinet with tray opened: 420 x 75/81 x 410 mm

- Total Harmonic Distortion: 0.003% (2020 000 Hz) approx.
~ Wow and Flutter: quartz crystal precision
- D/A Conversion: quadruple oversampling (176.4 kHz) Disc
with digital filter and two 16 bit D/A converters - Diameter: 120 mm and 80 mm
- Error Correction System: Cross Interleaved Reed - Thickness: 1.2 mm

Solomon Code (CIRC)
- Audio Output Level: 2 Vrms

- Headphones load impedance: 32-600 £2

Optical Readout System
- Laser: semi-conductor AIGaAs
- Wavelength:780 nm

Signal Format
- Sampling Frequency: 441 kHz
» Quantization: 16 bit linear/channel

WARNING

All ICs and many other semi-conductors are
susceptible to electrostatic discharges (ESD).
Careless handling during repair can reduce lite
drastically.

When repairing, make sure that you are
connected with the same potential as the mass
of the set via a wrist wrap wrth resistance.
Keep components and tools also at this
potential.

(9 A1'I'ENTION

Tous les IC et beaucoup d'autres
semi-conducteurs sent sensibles aux
decharges statiqueleSD).

Leur Iongévite pcurrait etre considerablement
ecourtée par Ie Iait quaucune precaution n'est
prise a leur manipulation.

Lors de reparations sassurer de bien étre relie
au méme potential que la masse de l'appareil et
entiler le bracelet seiti d'une resistance de
sécurité.

Veiller a Ce que las oomposants ainsr que les
outils que I'on utilisesoient e'galement a ce
potential.

CS 17 542

- Direction of Rotation (seen from reading side):

anti-clockwise

- Scanning Velocity: 1.2-1.4 m/s
- Rotation Speed: 500-200 rpm
- Playing Time (theoretical): 74 min (stereo)

- Track Pitch: 1.6 pm
- Material: plastic

The right is reserved to change data if necessary

This Compact Disc player complies with the radio
interference requirements as laid down in EEC (European
Economic Community) regulations.

® WARNUNG

Alle ICs und viele andare Halbleiter sind
emptindlich gegenflber elektrostatischen
Entladungen (ESD).

Unsorgfaltige Behandlung im Reparaturlall kan
die Lebensdauer drastisch reduzieren.
Veranlassen Sie. dass Sie im Reparaturiall uber
ein Pulsarmband mit Widerstand verbunden
sind mil dem gleichen Potential we die Masse
des Gerates.

Bauteile und Hilismittel auch aui dieses gleiche
Potential halten.

® WAARSCHUWING

Aile lCs en vele andere hallgeleiders zrjn
gevoelig voor electrostatische ontladingen
(ESD).

Onzorgvuidig behandeien tijdens reparatie kan
de Ievensduur drastisch doen verminderen.
Zorg ervoor dat u tildens reparatie via een
polsband met weerstand verbonden bent met
hetzelfde potentiaal als de massa van het
apparaat.

Houd componenten en hulpmiddelen ook op
ditzelfde potentiaal.

® AVVERTIMENTO

Tutti IC e parecchi semirconduttori sono
sensibili alle scariche statiche (ESD).

La Ioro Iongevrta potrebbe essere fortemente
ridatta in case di non osservazione della piu
grande cauzione alIa ioro manipolazione.
Durante le riparazioni occorre quindi essere
collegato allo stesso potenziale che quello della
massa dell'apparecchic tramite un braccialetto
a resistenza.

Assicurarsr one I componenti e anche gli utensili
con quali si Iavora siano anche a questo
potenziale.

SERVICE TOOLS

Audio test disc (3)
Disc without errors (5)+
disc with DO errors,
black spots and fingerprints (5A)
Disc 55 min 1kHz
without pause
Torx screwdrivers

Set (straight)

Set (square)
13th order filter
Service cable (5p)
Service cable (14p)
Service flexfoil (14p)
Service connector (14p)
Glass disc

SERVICING HINTS

In the set chip components have been applied
For disassembly and assembly of chip components see
the figure below.

The disc should always rest properly on the turntable.

To achieve this a disc hold-down has been mounted in a
bracket of the tray mechanism.

If the tray mechanism has to be disassembled for
servicing, a separate disc hold-down should be used. For
a service disc hold-down see drawing 42565 A12.

Test discs

It is important to treat the test discs with great care. The
disorders on the discs (black spots. fingerprints. etc.) are
exclusive and unambiguously positioned. Damage may
cause additional drop-outs etc. rendering the intentional
errors no longer exclusive. In that case it will no longer
be possible to check eg the good working of the track
detectors.

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4822 395 90204

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