Philips PET-722 Service Manual

DVD Portable Player PET722 / PET726

All version

Service Manual

©Copyright 2005 Philips Consumer Electronics B.V. Eindhoven, The Netherlands
All rights reserved. No part of this publication may by reproduced, stored in a
retrieval system or transmitted, in any form or by any means, electronics,
mechanical, photocopying, or otherwise without the prior permission of Philips

TABLE OF CONTENTS

Chapter

Technical Specification & Service Tips…………..……….. 1
Safety Instructions…………………………………………….. 2
Instruction for Use……………………………………………… 3
Mechanical Instructions………………………………………. 4
Troubleshooting …………………………………………………5
Overall Block Diagram…………………………………………. 6
Electrical Diagram……………………………………………… 7
Service Part List………………………………...………………. 8
Revision List……………………………………………………. 9

3141 785 32442

Version 1.2

1.0 TECHNICAL SPECIFICATION

General

Dimensions (W x H x D): 158 x 210 x 39.5 mm
Bear Unit Weight: 0.79 kg +/- 5%
Power supply:
Supply voltage Input: 100~240V + / - 10%

Supply Power
consumption (AC adaptor
100/240VAC)
Operating Temperature 0 – 45degC
Video System NTSC / PAL
Frequency response 20-20kHz +/-1dB
THD 20-20kHz (%): </=3%
Dynamic range 1kHz >/=80dB
Signal/Noise ratio: >/=80dB
Channel Separation 1kHz >=80dB
Channel Balance 1kHz <2dB

Current consumption

Playback time
Capacity--- Refer to battery
spec
Battery discharge cut-off
current
Max.battery charge
current(continue charge) of
DCP850 & DCP750
Charging time 2 +/- 0.5H

Headphone out (headphone output load 2x16 ohm)

Maximum output power:
Frequency response:
SNR (A-wght):
THD (0.2-20kHz):
Left-Right Channel
Separation:
Left-Right Channel
Balance:

Supported disc type

Video Playback
Formats:

Audio Playback
Formats:

50/60Hz 0.3A
Output: DC 9V 1A

9W + 10%

≥

40mA
400-500

1.5mW
+/-3dB
>70dB
3%
>/=50dB

</=1dB

1600mAH

Playback disc type: DVD, Picture-CD,

Video Playback Format: DVD / VCD / SVCD / CD

Audio Playback Format: CD/MP3, MP3-DVD,

Disc Diameter 12cm

Pixel specification

SVCD, Video CD, MP3­CD, CD-R/CD-RW,
WMA-CD, DVD-R, DVD­RW, DVD+R, DVD+RW

/ JPEG

DVD

Max. 0 bright-dot & max. 3 dark-dots

Factory Service Mode (FSM)

To check the software version and change
region code of your DVD Portable

1. Power ON the DVD player and open the DVD
door

2. Press the “SETUP” button on remote control,
then select the “Preference MENU”

3. Press the remote button in the sequence as

9 -> 6 -> 5 -> 3

4. The LCD display showed the existing region

code. Press (navigation up) or
(navigation down) repeatedly to select the
number from 0 to 6.

5.

Refer below table for your region code setting

Select “0” setting = Region Free (confidential)

1.0 TECHNICAL SPECIFICATION

Procedure on how to upgrade the software of
the DVD Portable

For the best performance of your DVD Portable.
Check www.philips.com/support for latest
software upgrades available.

A) By CD-ROM

1. Download the “PHILIPS.BIN” file from the Philips
support site

2. Unzip the file and then burn it into a CD-ROM to
make a disc for upgrade

3. CD-ROM disc name must be “PHILIPS”
(otherwise it will not be recognized as a disc for
upgrade)

4. Power on the Portable DVD Player with AC/DC
adaptor

5. Play CD-ROM for firmware upgrade

Warning: Do not unplug the AC adaptor during
firmware upgrade to prevent flash corrupt of the
set!!

6. Once upgrade is completed, the player will restart
automatically and observed PHILIPS LOGO on the
screen.

7. Open the DVD door to remove the disc

1.0 TECHNICAL SPECIFICATION

Service Policy on PCBA of PET722 /
PET726

Type /05 /12 /98
Main PCBA MLR MLR MLR
TFT PCBA MLR MLR MLR
KEY PCBA MLR MLR MLR
BATTERY PCBA MLR MLR MLR

MLR = module swap

2.0 SAFTETY INSTRUCTIONS

WARNING

GB

All ICs and many other semi-conductors are
susceptible to electrostatic discharges (ESD).
Careless handling during repair can reduce life
drastically.
When repairing, make sure that you are
connected with the same potential as the mass
of the set via a wrist wrap with resistance.
Keep components and tools also at this
potential.

F

ATTENTION

Tous les IC et beaucoup d’autres
semi-conducteurs sont sensibles aux
décharges statiques (ESD).
Leur longévité pourrait être considérablement
écourtée par le fait qu’aucune précaution n’est
prise à leur manipulation.
Lors de réparations, s’assurer de bien être relié
au même potentiel que la masse de l’appareil et
enfiler le bracelet serti d’une résistance de
sécurité.
Veiller à ce que les composants ainsi que les
outils que l’on utilise soient également à ce
potentiel.

ESD

D

WARNUNG

Alle ICs und viele andere Halbleiter sind
empfindlich gegenüber elektrostatischen
Entladungen (ESD).
Unsorgfältige Behandlung im Reparaturfall kan
die Lebensdauer drastisch reduzieren.
Veranlassen Sie, dass Sie im Reparaturfall über
ein Pulsarmband mit Widerstand verbunden
sind mit dem gleichen Potential wie die Masse
des Gerätes.
Bauteile und Hilfsmittel auch auf dieses gleiche
Potential halten.

WAARSCHUWING

NL

Alle IC’s en vele andere halfgeleiders zijn
gevoelig voor electrostatische ontladingen
(ESD).
Onzorgvuldig behandelen tijdens reparatie kan
de levensduur drastisch doen verminderen.
Zorg ervoor dat u tijdens 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.

I

AVVERTIMENTO

Tutti IC e parecchi semi-conduttori sono
sensibili alle scariche statiche (ESD).
La loro longevità potrebbe essere fortemente
ridatta in caso di non osservazione della più
grande cauzione alla loro manipolazione.
Durante le riparazioni occorre quindi essere
collegato allo stesso potenziale che quello della
massa dell’apparecchio tramite un braccialetto
a resistenza.
Assicurarsi che i componenti e anche gli utensili
con quali si lavora siano anche a questo
potenziale.

GB

Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified,
be used.

NL

Veiligheidsbepalingen vereisen, dat het apparaat bij reparatie in
zijn oorspronkelijke toestand wordt teruggebracht en dat onderdelen,
identiek aan de gespecificeerde, worden toegepast.

F

Les normes de sécurité exigent que l’appareil soit remis à l’état
d’origine et que soient utiliséés les piéces de rechange identiques
à celles spécifiées.

D

Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu
beachten. Der Original zustand des Geräts darf nicht verändert werden;
für Reparaturen sind Original-Ersatzteile zu verwenden.

I

Le norme di sicurezza esigono che l’apparecchio venga rimesso
nelle condizioni originali e che siano utilizzati i pezzi di ricambio
identici a quelli specificati.

“Pour votre sécurité, ces documents
doivent être utilisés par des spécia­listes agréés, seuls habilités à réparer
votre appareil en panne”.

CLASS 1

LASER PRODUCT

GB

Warning !

Invisible laser radiation when open.
Avoid direct exposure to beam.

S

Varning !

Osynlig laserstrålning när apparaten är öppnad och spärren
är urkopplad. Betrakta ej strålen.

Varoitus !

SF

Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina
näkymättömälle laserisäteilylle. Älä katso säteeseen!

3122 110 03420

"After servicing and before returning set to customer perform a
leakage current measurement test from all exposed metal parts to
earth ground to assure no shock hazard exist. The leakage current
must not exceed 0.5mA."

DK Advarse !

Usynlig laserstråling ved åbning når sikkerhedsafbrydere er
ude af funktion. Undgå udsaettelse for stråling.

2.1 ESD PROTECTION

Whenthepowersupplyisbeingturnedon,youmaynotremovethislasercautionslabel.Ifitremoves,radiationoflaser

maybereceived.

PREPARATIONOFSERVICING

PickupHeadconsistsofalaserdiodethatisverysusceptibletoexternalstaticelectrocity.

Althoughitoperatesproperlyafterreplacement,ifitwassubjecttoelectrostaticdischargeduringreplacement,

itslifemightbeshortened.Whenreplacing,useaconductivemat,solderingironwithgroundwire,etc.to

protectthelaserdiodeformdamagebystaticelectricity.

Andalso,theLSIandICaresameasabove.

Groundconductive
wriststrapforbody.

Solderingiron
withgroundwire
orceramictype

1M

Conductivemat

Thegroundresistance
betweenthegroundline
andthegroundislessthan10

SAFTY NOTICE

LEAKAGE CURRENT CHECK

SAFTY PRECAUTIONS

Plug the AC line cord directly into a 120V AC outlet (do

not use an isolation transformer for this check). Use an

AC voltmeter, having 5000 per volt or more sensitivity.

Connect a 1500 10W resistor,paralleled by a 0.15uF

150V AC capacitor between a knomn good earth ground

(water pipe, conduit, etc.) and all exposed metal parts of

cabinet (antennas, handle bracket, metal cabinet

screwheads, metal overlays, control shafts, etc.).

READING SHOULD NOT EXCEED 0.3V

DVD VIDEO PLAYER

Measure the AC voltage across the 1500 resistor.

The test must be conducted with the AC switch on and

then repeated with the AC switch off. The AC voltage

indicated by the meter may not exceed 0.3V.A reading

exceeding 0.3V indicates that a dangerous potential

exists, the fault must be located and corrected.

Repeat the above test with the DVD VIDEO PLAYER

power plug reversed.

NEVER RETURN A DVD VIDEO PLAYER TO THE

CUSTOMER WITHOUT TAKING NECESSARY

CORRECTIVE ACTION.

AC VOLTMETER

(5000 per volt
or more sensitivity)

Good earth ground

1500
10W

such as a water pipe,
conduit, etc.

AC OUTLET

0.15uF 150V AC

Test all exposed metal.
Voltmeter Hook-up for Leakage Current Check

The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.

2.2 SAFETY INSTRUCTIONS

Battery Handling Guideline

Since the battery is packed in soft package, to ensure its better performance, it’s very important to carefully handle
the battery

2.2.1 Soft Aluminium foil
The soft aluminum packing foil is very easily damaged by sharp edge parts such as Ni-tabs, pins and needles.

• Don’t strike battery with any sharp edge parts

• Trim your nail or wear glove before taking battery

• Clean worktable to make sure no any sharp particl e

2.2.2 Sealed edge
Sealing edge is very flimsy

• Don’t bend or fold sealing edge

2.2.3 Folding edge

The folding edge is form in battery process and passed all hermetic test.

• Don’t open or deform folding edge

2.2.4 Tabs
The battery tabs are not so stubborn especially for aluminum tab.

• Don’t bend tab

2.2.5 Mechanical shock

• Don’t Fall, hit, bend battery body

2.2.6 Short

Short terminals of battery is strictly prohibited, it may damage battery.

3.0 INSTRUCTION FOR USE

4.0 MECHANICAL INSTRUCTION

Disassembly Procedure

1. Remove 5pcs of screws on the side of
bottom cabinet (include the one behind
plastic stand).

2. Slip the TFT section, then you can open
the bottom cabinet. Be careful of the FFC
which connect with main board and TFT
board.

2. Open the bottom cabinet, up-plug all the

wire connecter from main board (include the
FFC connect with TFT board and main
board),
The wire connecter are for:

DVD loader,
Battery board.

Remove all the screws on the main board
(3pcs), and then take the main board from
bottom cabinet.

4.0 MECHANICAL INSTRUCTION

3. Up-plug the FFC from DVD driver, then
you can take out the DVD Driver.

4. Remove the flex FFC on the bottom side

behind the black

flannel

.

5. Remove 4pcs of screws on the battery

board.
Then take out the battery together with the
battery board.
Note: the battery was fixed by two side tape!

Remove 6pcs of screws on the DVD top
cabinet, you can separate the DVD top
cabinet and TFT back cabinet.

4.0 MECHANICAL INSTRUCTION

6. Remove 8pcs of screws on the TFT back

cabinet. Then you can open the display
frame, carefully! ( There is a catch as shown
in the pictures)

7. To remove the hinge, remove the screws

on the hinge.

8. To remove the TFT, de-soldering the wire

connected between panel and TFT board first;
After this,

which behind the black

Then you can separate the panel.

Be aware that the panel is fixed by 4pcs two side
tape

up-plug the FFC from TFT board

flannel;