Philips 15PF9925 Service Manual

Colour Television

15PF9925/12S/19S

AA

Contents Page

Block diagram
Description of controls
Adjustment Instructions
Troubleshooting
Exploded View
Exploded View Parts List
Replacement Parts List
Circuit diagram, Printed Board Lay-out

©

Copyright 2002 Philips Consumer Electronics B.V. Eindhoven, The Netherlands.
All rights reserved. No part of this publication may be reproduced, stored in a
retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.

Published by TA 0260 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 12510

Tuner & IF

- TAUC-S120D

- TAFC-M130D

- TAFC-Z140D

Audio

Processor

- MSP3410D

Ext- L

Micro-Controller

- INFINEON ( SDA55XX )

L

LCD

< LCD TV System Block Diagram >

Video

Decorder

- VPC3230D

Video Scaler

- MX88L284

Computer

Signal

- D-Sub

R/G/B

H/V

D-R/G/B,
H / V -Sync,
Den, Clock

From
Computer

OSD -IC

MC141585

CVBS

Audio-Amp

LA4282

R

Ext- R

SIF

For MNT Application

LM151X3 - 8-bits

1H/1V

A to D Converter

- AD9884

For PC Input

- Contrast

- Brightness

- Color

Ext_Video

Ext_Y/C

OSD B/R/G/B

Scart RGB

For TV
. Contrast
. Brightness
. Color
. Tint

CVBS For TXT

AM

Interface

- TMDS (8bits)21 pin

RGB Switching

TDA8601

Y / Cb / Cr

RGB in

Back Light
Inverter Assy

CVBS OUT

DESCRIPTION OF CONTROLS

MENU

OK

PV

¬

5

1

3

2

4

6

7

9

8

0

0

LIST

h

f g

Ò

‡

π

c

b

®

†

U

e

k

C

a

D

B

M

AUTO

AUTO

w

Y-Z

w Source

Select your computer or other
peripherals:press repeatedly to
select

TV, AV1, AV2,S-VIDEO

or PC monitor mode.

X Bilingual choice and
sound mode selection

Press this key

• to switch from

Stereo to

Mono sound in case of

stereo transmission,or from

Nicam Stereo to Nicam
Mono

,in case of digital

transmission

• to switch from

Nicam Dual

Y to Nicam Dual Z or

Nicam Dual X in case of

Nicam Dual transmission

• to choose between

Dual Y,

Dual Z or Dual X in case

of bilingual transmission:

Dual Y sends the primary

broadcast language to the
loudspeakers;

Dual Z sends the secondary

broadcast language to the
loudspeakers;

Dual X sends a separate

language to each loudspeaker.

Note: in case of weak stereo
sound signals, with stereo or
Nicam stereo transmission,select
mono reception.

Sound output selection in AV mode

In AV mode,you can select the output sound for the left and right loudspeakers.
Press the X key repeatedly to select:

• L+R:the audio signal from the audio L input is sent to the left loudspeaker,the audio signal
from the audio R input to the right loudspeaker

• L+L:the audio signal from the audio L input is sent to the left and right loudspeakers

• R+R:the audio signal from the audio R input is sent to the left and right loudspeakers.

B Standby

Switches the TV on from
standby or off to standby.

AUTO keys

To select predefined picture
and sound settings.

a

AUTO picture

Each time it is pressed,a
different picture setting is
selected,corresponding with
specific factory settings of
Contrast,Brightness,Colour
and Sharpness.

M

AUTO sound

Each time it is pressed,a
different sound setting is
selected,corresponding with
specific factory settings of
treble and bass.

Personal refers to the personal

preference settings of picture
and sound selected and stored
in the picture and sound menu.

B

M

a

AUTO

AUTO

w

Y-Z

C

h

f g

c

b

e

k

Ò

‡

π

®

†

U

D

1

2

9

3

6

5

7

4

8

0

0

LIST

MENU

OK

P

¬

V

V Volume

Press + or - to adjust the
volume.

¬ Mute

Temporarily interrupt the
sound or restore it.

P Programme selection

• to browse through the TV
channels which are not
skipped

• to switch the TV on from
standby.

®Ò‡π† Video
recorder keys

U Time display

The time, downloaded from the
TV channel (with teletext
broadcast) stored on
programme number 1 or the
lowest not skipped programme
number, is displayed on the
screen.

0/9 Digit keys

To select a TV channel.

0 Previous programme

To display the previously
selected TV channel.

LIST Programme list

To display the programme list.

b Teletext on/off

Teletext functions

hUfgcek

D Sleeptimer

With this key you can set a
time period after which the
TV should switch itself to
standby.
Press the key repeatedly to
select the number of minutes.
The counter runs from B 0,
10,20, 30... to 240 minutes.
The timer begins to count
down from the number of
minutes selected.

Note:To view the remaining time,
press the

D key once.To cancel

the sleep time, repeatedly press
the

D key until B 0 appears.

MENU Press repeatedly to

display each menu.
OK Press this key to activate

your choice,when in the menus.

Should your remote control be lost or broken you can still operate your TV with the keys
in front of the TV.

ON/OFF:Press the power ON/OFF key to switch the TV on or off
TV/VIDEO:Press repeatedly to select TV,AV or PC monitor mode
MENU:Press repeatedly to display each menu

OK: - Press this key to activate your choice when in the menu

-

Auto demonstration:Keep the OK key pressed for about 10 seconds.

All the menus are being displayed automatically one after the other.

To stop Auto demonstration, press any key on the front panel.

- VOL + :- Press - or + to select a menu item;

- Press - or + to adjust the volume;

- Press - or + to adjust the menu settings.

- CH/PR +:- Press - or + to browse through the TV channels which are not skipped;

- Press - or + to select a menu item;

- To switch the TV on from standby.

B: Switches the TV on from standby or off to standby.

The B indicator lights up brightly when the TV is in standby,dims when the TV is

switched on.

TV / VIDEO MENU

OK

_

VOL

+

_

CH / PR

+

B

ON / OFF