Philips HTS3220, Service Manual

1  Safety Instructions

1.1  General Safety

Safety regulations require that during a repair:

•  Connect the unit to the mains via an isolation transformer.

•  Replace safety components, indicated by the symbol   ,

only by components identical to the original ones. Any

other component substitution (other than original type)  

may increase risk of fire or electrical shock hazard.

Safety regulations require that after a repair, you must return  

the unit in its original condition. Pay, in particular, attention to

the following points:

•  Route the wires/cables correctly

, and fix them with the

mounted cable clamps.

• 

Check the insulation of the mains lead for external

damage.

•  Check the electrical DC resistance between the mains  

plug and the secondary side:

1.  Unplug the mains cord, and connect a wire between

the two pins of the mains plug.

2.  Set the mains switch to the ‘on’ position (keep the

mains cord unplugged!).

3.  Measure the resistance value between the mains  

plug and the front panel, controls, and chassis  

bottom.

4.  Repair or correct unit when the resistance

measurement is less than 1 MΩ.

5.  Verify this, before you return the unit to the customer/

user (ref. UL-standard no. 1492).

6.  Switch the unit ‘off’, and remove the wire between the  

two pins of the mains plug.

1.2  Laser Safety

This unit employs a laser

. Only qualified service personnel  

may remove the cover, or attempt to service this device (due  

to possible eye injury).

Laser Device Unit

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Wavelength 

:   650 nm (DVD)

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Output Power 

:   20 mW

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Beam divergence 

:   60 degree

CLASS  1

LASER PRODUCT

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Note:  Use of controls or adjustments or performance of  

procedure other than those speci

fi

ed herein, may result in  

hazardous radiation exposure.

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void direct exposure to beam.

2  Warnings

2.1  General

•  All ICs and many other semiconductors are susceptible to 

electrostatic discharges (ESD,  ). Careless handling  

during repair can reduce life drastically. Make sure that, 

during repair, you are at the same potential as the mass  

of the set by a wristband with resistance. Keep    

components and tools at this same potential.

Available ESD protection equipment:

–  Complete kit ESD3 (small tablemat, wristband, 

connection box, extension cable and earth cable)  

4822 310 10671.

–  Wristband tester 4822 344 13999.

•  Be careful during measurements in the live voltage  

section. The primary side of the power supply, including  

the heatsink, carries live mains voltage when you  

connect the player to the mains (even when the   

player is ‘off’!). It is possible to touch copper tracks and/ 

or components in this unshielded primary area, when  

you service the player. Service personnel must take  

precautions to prevent touching this area or components  

in this area. A ‘lightning stroke’ and a stripe-marked  

printing on the printed wiring board, indicate the primary  

side of the power supply. 

•  Never replace modules, or components, while the unit is  

‘on’.

2.2  Laser

•  The use of optical instruments with this product, will  

increase eye hazard.

•  Only quali

fi

ed service personnel may remove the cover or  

attempt to service this device, due to possible eye injury.

•  Repair handling should take place as much as possible  

with a disc loaded inside the player.

•  T

ext below is placed inside the unit, on the laser cover  

shield:

Figure 2-2

Safety Information & Warnings

CAUTION  VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM

ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING VED ÅBNING UNDGÅ UDSÆTTELSE FOR STRÅLING

ADVARSEL SYNLIG OG USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES UNNGÅ EKSPONERING FOR STRÅLEN

VARNING SYNLIG OCH OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD BETRAKTA EJ STRÅLEN

VARO! AVATTAESSA OLET ALTTIINA NÄKYVÄLLE JA NÄKYMÄTTÖMÄLLE LASER SÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN

VORSICHT SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET NICHT DEM STRAHL AUSSETSEN 

DANGER VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID DIRECT EXPOSURE TO BEAM

ATTENTION RAYONNEMENT LASER VISIBLE ET INVISIBLE EN CAS D’OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU

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