Philips VEM14.1E Schematic

Colour Television Chassis

VEM14.1E

Contents Page

1. Revision List 2

2. Technical Specs, Diversity, and Connections 2

3. Precautions, Notes, and Abbreviation List 5

4. Mechanical Instructions 9

5. Service Modes and Fault Finding 16

6. Alignments 19

7. Circuit Descriptions 20

8. IC Data Sheets 23

9. Block Diagrams Wiring diagram 2000 series 20” 34 Wiring diagram 2000 series 23” 35 Wiring diagram 2000 series 28” 36 Wiring diagram 2000 series 32” 37 Wiring diagram 2000 series 40” 38 Block diagram 2000 series MB82S platform 39

10. Circuit Diagrams and PWB Layouts Drawing PWB A 17ips61-3-P V1 20”, 23”, 28” Power Supply A 17ips71-R3 32” Power Supply 44 44-47 A 17ips20-R6 40” Power Supply 48 48-52 B 17MB82S SSB 53 53-63 J 17LD141-2 IR/LED 64

11. Styling Sheets 2000 series 20" 65 2000 series 23" 66 2000 series 28" 67 2000 series 32" 68 2000 series 40" 69

40 40-43

Published by MB/SC 1370 Quality Printed in the Netherlands Subject to modification EN 3122 785 19710

2014-Apr-09

2014 ©

TP Vision Netherlands B.V.

All rights reserved. Specifications are subject to change without notice. Trademarks are the property of Koninklijke Philips Electronics N.V. or their respective owners. TP Vision Netherlands B.V. reserves the right to change products at any time without being obliged to adjust earlier supplies accordingly. PHILIPS and the PHILIPS’ Shield Emblem are used under license from Koninklijke Phil ips Electronics N.V.

EN 2 VEM14.1E_LA1.

Revision List

1. Revision List

Manual xxxx xxx xxxx.0 • First release.

2. Technical Specs, Diversity, and Connections

Index of this chapter:

2.1

Technical Specifications

• Figures can deviate due to the different set executions.

• Specifications are indicative (subject to change).

2.2 Directions for Use

2.3 Connections

2.4 Chassis Overview

2.1 Technical Specifications

For on-line product support please use the links in. Here is product information available, as well as getting started, user

Notes:

manuals, frequently asked questions and software & drivers.

Table 2-1 Described Model Numbers

24 79 10 11

Mechanics Description Architecture Block Diagrams Schematics Styling

CTN

20HFL2809D/12 2-1 4-1 4.3.1 7.1.2 9.1 9.6 10.1 10.4 10.5 11.1

23HFL2809D/12 2-1 4-2 4.3.2 7.1.2 9.2 9.6 10.1 10.4 10.5 11.2

28HFL2809D/12 2-1 4-3 4.3.3 7.1.2 9.3 9.6 10.1 10.4 10.5 11.3

32HFL2809D/12 2-1 4-4 4.3.3 7.1.2 9.4 9.6 10.2 10.4 10.5 11.4

40HFL2809D/12 2-1 4-5 4.3.3 7.1.2 9.5 9.6 10.3 10.4 10.5 11.5

Connection Overview

Cable Dressing

Back cover removal

SSB cell layouts

Wiring Diagram

Block diagram

Power Supply

Note: The given Model Numbers are subject to change.

2.2 Directions for Use

Directions for use can be downloaded from the following websites:

http://www.philips.com/support http://www.p4c.philips.com

SSB

J (IR/LED panel)

Sheet

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2.3 Connections

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Technical Specs, Diversity, and Connections

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Figure 2-1 Connection overview (..H/12 series)

Note: The following connector colour abbreviations are used

(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy= Grey, Rd= Red, Wh= White, Ye= Yellow.

2.3.1 Side Connections

1 - Common Interface

32p - See figure 10-4-1

2 - USB2.0

Figure 2-2 USB (type A)

1-+5V k 2 -Data (-) jk 3 -Data (+) jk 4 -Ground Gnd H

3 - Cinch: Video CVBS - In, Audio - In

Ye - Video CVBS 1 V Rd - Audio R 0.5 V Wh - Audio L 0.5 V

/ 75  jq

/ 10 k jq

RMS

/ 10 k jq

RMS

4 - Head phone (Output)

Bk - Head phone 80 - 600  / 10 mW ot

2.3.2 Rear Connections

5 - TV ANTENNA - In

Signal input from an antenna, cable or satellite.

6 - HDMI 1: Digital Video, Digital Audio - In

Figure 2-3 HDMI (type A) connector

1 -D2+ Data channel j 2 -Shield Gnd H 3 -D2- Data channel j 4 -D1+ Data channel j 5 -Shield Gnd H 6 -D1- Data channel j 7 -D0+ Data channel j 8 -Shield Gnd H 9 -D0- Data channel j 10 - CLK+ Data channel j 11 - Shield Gnd H 12 - CLK- Data channel j 13 - Easylink/CEC Control channel jk 14 - ARC Audio Return Channel k 15 - DDC_SCL DDC clock j 16 - DDC_SDA DDC data jk 17 - Ground Gnd H 18 - +5V j 19 - HPD Hot Plug Detect j 20 - Ground Gnd H

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Technical Specs, Diversity, and Connections

Figure 2-4 VGA connector

1 - Video Red 0.7 V 2 -Video Green 0.7 V 3 -Video Blue 0.7 V 4-n.c.

/ 75 W j

5 -Ground Gnd H 6 -Ground Red Gnd H 7 -Ground Green Gnd H 8 -Ground Blue Gnd H 9-+5V 10 - Ground Sync Gnd H

+5 V j

11 - Ground Red Gnd H 12 - DDC_SDA DDC data j 13 - H-sync 0 - 5 V j 14 - V-sync 0 - 5 V j 15 - DDC_SCL DDC clock j

8- Cinch: S/PDIF - Out

Bk - Coaxial 0.4 - 0.6V

/ 75 ohm kq

9 - EXT1: Video RGB/YC - In, CVBS - In/Out, Audio - In/Out

Figure 2-5 SCART connector

1 -Audio R 0.5 V 2 -Audio R 0.5 V 3 -Audio L 0.5 V

/ 1 k k

RMS

/ 10 k j

RMS

/ 1 k k

RMS

4 -Ground Audio Gnd H 5 -Ground Blue Gnd H 6 -Audio L 0.5 V 7 -Video Blue/C-out 0.7 V

/ 10 k j

RMS

/ 75  jk

8 -Function Select 0 - 2 V: INT

4.5 - 7 V: EXT 16:9

9.5 - 12 V: EXT 4:3 j

9 -Ground Green Gnd H 10 - n.c. 11 - Video Green 0.7 V

/ 75  j

12 - n.c. 13 - Ground Red Gnd H 14 - Ground P50 Gnd H 15 - Video Red/C 0.7 V 16 - Status/FBL 0 - 0.4 V: INT

/ 75  j

1 - 3 V: EXT / 75  j 17 - Ground Video Gnd H 18 - Ground FBL Gnd H 19 - Video CVBS 1 V 20 - Video CVBS/Y 1 V 21 - Shield Gnd H

/ 75  k

/ 75  j

2.4 Chassis Overview

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Refer to 9. Block Diagrams for PWB/CBA locations.

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Precautions, Notes, and Abbreviation List

3. Precautions, Notes, and Abbreviation List

Index of this chapter:

3.1

Safety Instructions

3.2 Warnings

3.3 Notes

3.4 Abbreviation List

3.1 Safety Instructions

Safety regulations require the following during a repair:

• Connect the set to the Mains/AC Power via an isolation

transformer (> 800 VA).

• Replace safety components, indicated by the symbol h,

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, the set must be returned in its original condition. Pay in particular attention to the following points:

• Route the wire trees correctly and fix them with the

mounted cable clamps.

• Check the insulation of the Mains/AC Power lead for

external damage.

• Check the strain relief of the Mains/AC Power cord for

proper function.

• Check the electrical DC resistance between the Mains/AC

Power plug and the secondary side (only for sets that have a Mains/AC Power isolated power supply):

1. Unplug the Mains/AC Power cord and connect a wire

between the two pins of the Mains/AC Power plug.

2. Set the Mains/AC Power switch to the “on” position

(keep the Mains/AC Power cord unplugged!).

3. Measure the resistance value between the pins of the

Mains/AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 M and 12 M.

4. Switch “off” the set, and remove the wire between the

two pins of the Mains/AC Power plug.

• Check the cabinet for defects, to prevent touching of any

inner parts by the customer.

3.2 Warnings

• All ICs and many other semiconductors are susceptible to

electrostatic discharges (ESD w). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential.

• Be careful during measurements in the high voltage

section.

• Never replace modules or other components while the unit

is switched “on”.

• When you align the set, use plastic rather than metal tools.

This will prevent any short circuits and the danger of a circuit becoming unstable.

3.3 Notes

3.3.1 General

• Measure the voltages and waveforms with regard to the

chassis (= tuner) ground (H), or hot ground (I), depending on the tested area of circuitry. The voltages and waveforms shown in the diagrams are indicative. Measure them in the Service Default Mode with a colour bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or 61.25 MHz for NTSC (channel 3).

• Where necessary, measure the waveforms and voltages

with (D) and without (E) aerial signal. Measure the voltages in the power supply section both in normal operation (G) and in stand-by (F). These values are indicated by means of the appropriate symbols.

3.3.2 Schematic Notes

• All resistor values are in ohms, and the value multiplier is

often used to indicate the decimal point location (e.g. 2K2 indicates 2.2 k).

• Resistor values with no multiplier may be indicated with

either an “E” or an “R” (e.g. 220E or 220R indicates 220 ).

• All capacitor values are given in micro-farads (10

nano-farads (n 10

• Capacitor values may also use the value multiplier as the

decimal point indication (e.g. 2p2 indicates 2.2 pF).

• An “asterisk” (*) indicates component usage varies. Refer

to the diversity tables for the correct values.

• The correct component values are listed on the Philips

Spare Parts Web Portal.

3.3.3 Spare Parts

For the latest spare part overview, consult your Philips Spare Part web portal.

3.3.4 BGA (Ball Grid Array) ICs

Introduction

For more information on how to handle BGA devices, visit this URL: http://www.atyourservice-magazine.com “Magazine”, then go to “Repair downloads”. Here you will find Information on how to deal with BGA-ICs.

BGA Temperature Profiles

For BGA-ICs, you must use the correct temperature-profile. Where applicable and available, this profile is added to the IC Data Sheet information section in this manual.

3.3.5 Lead-free Soldering

Due to lead-free technology some rules have to be respected by the workshop during a repair:

• Use only lead-free soldering tin. If lead-free solder paste is

required, please contact the manufacturer of your soldering equipment. In general, use of solder paste within workshops should be avoided because paste is not easy to store and to handle.

• Use only adequate solder tools applicable for lead-free

soldering tin. The solder tool must be able:

– To reach a solder-tip temperature of at least 400°C. – To stabilize the adjusted temperature at the solder-tip. – To exchange solder-tips for different applications.

• Adjust your solder tool so that a temperature of around

360°C - 380°C is reached and stabilized at the solder joint. Heating time of the solder-joint should not exceed ~ 4 sec. Avoid temperatures above 400°C, otherwise wear-out of tips will increase drastically and flux-fluid will be destroyed. To avoid wear-out of tips, switch “off” unused equipment or reduce heat.

• Mix of lead-free soldering tin/parts with leaded soldering

tin/parts is possible but PHILIPS recommends strongly to avoid mixed regimes. If this cannot be avoided, carefully clear the solder-joint from old tin and re-solder with new tin.

3.3.6 Alternative BOM identification

It should be noted that on the European Service website, “Alternative BOM” is referred to as “Design variant”.

The third digit in the serial number (example: AG2B0335000001) indicates the number of the alternative B.O.M. (Bill Of Materials) that has been used for producing the specific TV set. In general, it is possible that the same TV model on the market is produced with e.g. two different types of displays, coming from two different suppliers. This will then

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-9

), or pico-farads (p 10

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Precautions, Notes, and Abbreviation List

result in sets which have the same CTN (Commercial Type Number; e.g. 28PW9515/12) but which have a different B.O.M. number. By looking at the third digit of the serial number, one can identify which B.O.M. is used for the TV set he is working with. If the third digit of the serial number contains the number “1” (example: AG1B033500001), then the TV set has been manufactured according to B.O.M. number 1. If the third digit is a “2” (example: AG2B0335000001), then the set has been produced according to B.O.M. no. 2. This is important for ordering the correct spare parts! For the third digit, the numbers 1...9 and the characters A...Z can be used, so in total: 9 plus 26= 35 different B.O.M.s can be indicated by the third digit of the serial number.

Identification: The bottom line of a type plate gives a 14-digit serial number. Digits 1 and 2 refer to the production centre (e.g. SN is Lysomice, RJ is Kobierzyce), digit 3 refers to the B.O.M. code, digit 4 refers to the Service version change code, digits 5 and 6 refer to the production year, and digits 7 and 8 refer to production week (in example below it is 2010 week 10 / 2010 week 17). The 6 last digits contain the serial number.

Figure 3-1 Serial number (example)

3.3.7 Board Level Repair (BLR) or Component Level Repair

(CLR)

If a board is defective, consult your repair procedure to decide if the board has to be exchanged or if it should be repaired on component level. If your repair procedure says the board should be exchanged completely, do not solder on the defective board. Otherwise, it cannot be returned to the O.E.M. supplier for back charging!

3.3.8 Practical Service Precautions

• It makes sense to avoid exposure to electrical shock.

While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

• Always respect voltages. While some may not be

dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

3.4 Abbreviation List

0/6/12 SCART switch control signal on A/V

board. 0 = loop through (AUX to TV),

6 = play 16 : 9 format, 12 = play 4 : 3 format

AARA Automatic Aspect Ratio Adaptation:

algorithm that adapts aspect ratio to remove horizontal black bars; keeps the original aspect ratio

ACI Automatic Channel Installation:

algorithm that installs TV channels directly from a cable network by

means of a predefined TXT page ADC Analogue to Digital Converter AFC Automatic Frequency Control: control

signal used to tune to the correct

frequency AGC Automatic Gain Control: algorithm that

controls the video input of the feature

box AM Amplitude Modulation AP Asia Pacific AR Aspect Ratio: 4 by 3 or 16 by 9 ASF Auto Screen Fit: algorithm that adapts

aspect ratio to remove horizontal black

bars without discarding video

information ATSC Advanced Television Systems

Committee, the digital TV standard in

the USA ATV See Auto TV Auto TV A hardware and software control

system that measures picture content,

and adapts image parameters in a

dynamic way AV External Audio Video AVC Audio Video Controller AVIP Audio Video Input Processor B/G Monochrome TV system. Sound

carrier distance is 5.5 MHz BDS Business Display Solutions (iTV) BLR Board-Level Repair BTSC Broadcast Television Standard

Committee. Multiplex FM stereo sound

system, originating from the USA and

used e.g. in LATAM and AP-NTSC

countries B-TXT Blue TeleteXT C Centre channel (audio) CEC Consumer Electronics Control bus:

remote control bus on HDMI

connections CL Constant Level: audio output to

connect with an external amplifier CLR Component Level Repair ComPair Computer aided rePair CP Connected Planet / Copy Protection CSM Customer Service Mode CTI Color Transient Improvement:

manipulates steepness of chroma

transients CVBS Composite Video Blanking and

Synchronization DAC Digital to Analogue Converter DBE Dynamic Bass Enhancement: extra

low frequency amplification DCM Data Communication Module. Also

referred to as System Card or

Smartcard (for iTV). DDC See “E-DDC” D/K Monochrome TV system. Sound

carrier distance is 6.5 MHz DFI Dynamic Frame Insertion DFU Directions For Use: owner's manual DMR Digital Media Reader: card reader DMSD Digital Multi Standard Decoding DNM Digital Natural Motion

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Precautions, Notes, and Abbreviation List

EN 7VEM14.1E_LA 3.

DNR Digital Noise Reduction: noise

reduction feature of the set DRAM Dynamic RAM DRM Digital Rights Management DSP Digital Signal Processing DST Dealer Service Tool: special remote

control designed for service

technicians DTCP Digital Transmission Content

Protection; A protocol for protecting

digital audio/video content that is

traversing a high speed serial bus,

such as IEEE-1394 DVB-C Digital Video Broadcast - Cable DVB-T Digital Video Broadcast - Terrestrial DVD Digital Versatile Disc DVI(-d) Digital Visual Interface (d= digital only) E-DDC Enhanced Display Data Channel

(VESA standard for communication

channel and display). Using E-DDC,

the video source can read the EDID

information form the display. EDID Extended Display Identification Data

(VESA standard) EEPROM Electrically Erasable and

Programmable Read Only Memory EMI Electro Magnetic Interference EPG Electronic Program Guide EPLD Erasable Programmable Logic Device EU Europe EXT EXTernal (source), entering the set by

SCART or by cinches (jacks) FDS Full Dual Screen (same as FDW) FDW Full Dual Window (same as FDS) FLASH FLASH memory FM Field Memory or Frequency

Modulation FPGA Field-Programmable Gate Array FTV Flat TeleVision Gb/s Giga bits per second G-TXT Green TeleteXT H H_sync to the module HD High Definition HDD Hard Disk Drive HDCP High-bandwidth Digital Content

Protection: A “key” encoded into the

HDMI/DVI signal that prevents video

data piracy. If a source is HDCP coded

and connected via HDMI/DVI without

the proper HDCP decoding, the

picture is put into a “snow vision” mode

or changed to a low resolution. For

normal content distribution the source

and the display device must be

enabled for HDCP “software key”

decoding. HDMI High Definition Multimedia Interface HP HeadPhone I Monochrome TV system. Sound

C Inter IC bus

D Inter IC Data bus

S Inter IC Sound bus

carrier distance is 6.0 MHz

IF Intermediate Frequency IR Infra Red IRQ Interrupt Request ITU-656 The ITU Radio communication Sector

(ITU-R) is a standards body

subcommittee of the International

Telecommunication Union relating to

radio communication. ITU-656 (a.k.a.

SDI), is a digitized video format used

for broadcast grade video.

Uncompressed digital component or

digital composite signals can be used.

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The SDI signal is self-synchronizing, uses 8 bit or 10 bit data words, and has a maximum data rate of 270 Mbit/s, with a minimum bandwidth of 135 MHz.

iTV Institutional TeleVision; TV sets for

hotels, hospitals etc.

LS Last Status; The settings last chosen

by the customer and read and stored in RAM or in the NVM. They are called at start-up of the set to configure it according to the customer's

preferences LATAM Latin America LCD Liquid Crystal Display LED Light Emitting Diode L/L' Monochrome TV system. Sound

carrier distance is 6.5 MHz. L' is Band

I, L is all bands except for Band I LPL LG.Philips LCD (supplier) LS Loudspeaker LVDS Low Voltage Differential Signalling Mbps Mega bits per second M/N Monochrome TV system. Sound

carrier distance is 4.5 MHz MHEG Part of a set of international standards

4. Mechanical Instructions

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Index of this chapter:

4.1

Cable Dressing

4.2 Service Positions

4.3 Assembly/Panel Removal

4.4 Set Re-assembly

4.1 Cable Dressing

Mechanical Instructions

Notes:

• Figures below can deviate slightly from the actual situation,

due to the different set executions.

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Figure 4-1 Cable dressing (20”)

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Mechanical Instructions

Figure 4-2 Cable dressing (23”)

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Figure 4-3 Cable dressing (28”)

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Figure 4-4 Cable dressing (32”)

Figure 4-5 Cable dressing (40”)

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Mechanical Instructions

4.2 Service Positions

For easy servicing of a TV set, the set should be put face down on a soft flat surface, foam buffers or other specific workshop tools. Ensure that a stable situation is created to perform measurements and alignments. When using foam bars take care that these always support the cabinet and never only the display. Caution: Failure to follow these guidelines can seriously damage the display! Ensure that ESD safe measures are taken.

4.3 Assembly/Panel Removal

Carefully lay the set on a flat, cushioned surface with the display side facing down and the stand hanging over the edge.

4.3.1 Rear Cover (20”)

Refer to Figure 4-7 Warning: Disconnect the mains power cord before removing the rear cover.

1. Remove the screws [1] that secure the power cable and

rear cover.

2. At the indicated areas [Blue points] the cover is secured by

clips. Be careful when releasing those.

3. Lift the rear cover from the TV.

4.3.2 Rear Cover (23”)

Refer to Figure 4-8 Warning: Disconnect the mains power cord before removing the rear cover.

1. Remove the screws [1 and 2] that secure rear cover.

2. At the indicated areas [Blue points] the cover is secured by

clips. Be careful when releasing those.

3. Lift the rear cover from the TV.

for details.

4.3.3 Rear Cover (28”, 32”, 40”)

Refer to Figure 4-9 Warning: Disconnect the mains power cord before removing the rear cover.

1. Remove the screws [1] at the bottom of the rear cover.

2. Remove the screws [2] that secure the back inputs area.

3. Remove the screws [3] that fixate the stand and remove

the stand.

4. At the indicated areas [Blue points] the cover is secured by

clips. Be careful when releasing those.

5. Lift the rear cover from the TV.

Figure 4-6 VESA bolts removal

, Figure 4-10 and Figure 4-11 for details.

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Figure 4-7 Rear cover removal (20”)

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Mechanical Instructions

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Figure 4-8 Rear cover removal (23”)

Figure 4-9 Rear cover removal (28”)

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Mechanical Instructions

Figure 4-10 Rear cover removal (32”)

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Figure 4-11 Rear cover removal (40”)

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4.3.4 Speakers

1. Unlug the connector from SSB.

2. Release the cables from their clamps(28”, 32”, 40”).

3. Release the tapes which fixate the cabling.

4. Take the speakers out.

When defective, replace the both units.

4.3.5 Power Supply Unit (PSU)

Caution: it is mandatory to remount all different screws at their

original position during re-assembly. Failure to do so may result in damaging the PSU.

1. Release the Power board cables from their clamps.

2. Unplug power connectors from the SSB, as it is not

unplug-able at the PSU itself (soldered connector).

3. Unplug all other connectors from the PSU.

4. Remove all fixation screws from the PSU.

5. The PSU can be taken out of the set now.

4.3.6 Small Signal Board (SSB)

Caution: it is mandatory to remount all different screws at their

original position during re-assembly. Failure to do so may result in damaging the SSB.

1. Pull the upper part of the connector, which fixes the LVDS

cable to the connector, from both sides up a little bit. Release the LVDS cable from its connector by pulling it up slowly. Release the LVDS cable from its connector on the SSB by pressing the clips on both sides and pulling it out slowly (for 40”). Caution: Be careful, as these are very fragile connectors!

2. Release the clamps and unplug all other connectors.

3. Remove all other fixation screws from the SSB.

4. The SSB can be taken out of the set now.

Mechanical Instructions

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4.3.7 IR/LED Board

1. Unplug the connector that connects the board with the

SSB.

2. Release the clamps and/or tapes that hold the boards

cable.

3. Remove the fixation screws on the protective cover and/or

on the board itself.

4. The IR/LED board can be taken out now. When defective, replace the whole unit.

4.3.8 LCD Panel

1. Remove the SSB as described earlier.

2. Remove the PSU as described earlier.

3. Remove the speakers and the IR/LED board as described

earlier (if necessary).

4. Release the clips (if necessary), that secure the LCD Panel

with the bezel.

5. Lift the LCD Panel from the bezel.

6. Release the clips from both sides of the LVDS Flat Foil

connector that connect to the LCD panel. Caution: Be careful, as these are very fragile connectors!

When defective, replace the whole unit.

4.4 Set Re-assembly

To re-assemble the whole set, execute all processes in reverse order.

Notes:

• While re-assembling, make sure that all cables are placed and connected in their original position. See Figure 4-1 see Figure 4-2

• Pay special attention not to damage the EMC foams on the SSB shields. Ensure that EMC foams are mounted correctly(If available).

for 28” model.

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Service Modes and Fault Finding

5. Service Modes and Fault Finding

Index of this chapter:

5.1

Test Points

5.2 Service Modes

5.3 Software Upgrading

5.4 Fault Finding and Repair Tips

5.1 Test Points

As most signals are digital, it will be difficult to measure waveforms with a standard oscilloscope. However, several key ICs are capable of generating test patterns. In this way it is possible to determine which part is defective.

Perform measurements under the following conditions:

• Video: Colour bar signal.

• Audio: 3 kHz left, 1 kHz right.

5.2 Service Modes

The Service Mode feature is split into two parts:

• Service Alignment Mode (SAM).

• Customer Service Mode (CSM).

SAM offer features, which can be used by the Service engineer to repair/align a TV set. Some features are:

• Display information (“Service Menu” (SAM) indication in upper right corner of screen, error buffer, software version, operating hours, options and option codes, sub menus).

The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call centre. In CSM mode, “CSM”, is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to:

• Increase the home repair hit rate.

• Decrease the number of nuisance calls.

• Solved customers’ problem without home visit.

- If the sub version number changes, the new version number is written in the NVM.

- If the NVM is fresh, the software identification, version, and cluster will be written to NVM.

5.2.2 Service Alignment Mode (SAM)

Purpose

• Change and test video settings.

• View options.

• TV life time

• SW number

• Factory reset

• Diagnose features

Specifications

• Operation minutes counter (maximum five digits

displayed).

• Software version and option settings display.

• Option settings.

•

Software alignments (White Tone).

How to Activate SAM

To activate SAM, use one of the following methods:

• Press Menu button first. While main menu is on screen

press 4725 consecutively. Do not allow the display to time out between entries while keying the sequence.

After entering SAM, the following items are displayed.

Note: For the new model range, a new remote control (RC) is used with some renamed buttons. This has an impact on the activation of the Service modes. For instance the old “Menu” button is now called “Home” (or is indicated by a “house” icon).

5.2.1 General

Next items are applicable to all Service Modes or are general.

Life Timer

During the life time cycle of the TV set, a timer is kept (called “TV Life Time”). It counts the normal operation minutes (not the Stand-by minutes). The actual value of the timer is displayed in SDM and SAM in a decimal value. Every two soft-resets increase the hour by + 60 minutes. Stand-by minutes are not counted.

Software Identification, Version, and Cluster

The software ID, version, and cluster will be shown in the main menu display of SAM, and CSM. The screen will show: “AAAAAB-XX.YY”, where:

• AAAAA is the chassis name: VEM11E_2.1.4n.

• B is the region indication: E = Europe, A = AP/China, U =

NAFTA, L = LATAM.

• XX is the main version number: this is updated with a major change of specification (incompatible with the previous software version). Numbering will go from 01 - 99 and AA - ZZ.

- If the main version number changes, the new version number is written in the NVM.

- If the main version number changes, the default settings are loaded.

• YY is the sub version number: this is updated with a minor change (backwards compatible with the previous versions). Numbering will go from 00 - 99.

Figure 5-1 Example of SAM

How to Store SAM Settings

All the changes which have been made are stored automatically. It is suffice to enter the new value and just exit.

How to Exit SAM

Use one the following method:

• Switch the set to STANDBY by pressing the mains button

on the remote control transmitter or the television set.

Note: When the TV is switched “off” by a power interrupt while in SAM, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.

5.2.3 Customer Service Mode (CSM)

Purpose

The Customer Service Mode shows information about the TV’s operation settings. The call centre can instruct the customer (by telephone) to enter CSM in order to identify the status of the set.This helps the call centre to diagnose problems and failures in the TV set before making a service call. The CSM is a read-only mode; therefore, modifications are not possible in this mode.

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Service Modes and Fault Finding

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EN 17VEM14.1E_LA 5.

Specifications

• Ignore “Service unfriendly modes”.

• Set the screen mode to full

screen (all contents on screen is visible).

• After leaving the Customer Service Mode, the original settings are restored.

• Possibility to use “CH+” or “CH-” for channel surfing, or enter the specific channel number on the RC.

Figure 5-2 CSM Menu

How to Activate CSM

Press the Menu button first and quickly press “123654” on the remote.

Note: Activation of the CSM is only possible if there is no (user) menu on the screen!

The TV set can be identified from this screen by looking at the model and serial no.

Contents of CSM

• USB Logging

• Video Settings

• Audio Settings

• Options 1

• Options 2

• Options 3

• Tuning Settings

• Source Settings

• Diagnostic

• USB Operations

How to Navigate

The user can not navigate through the menus. Only USB Logging option is available. Press Left or Right button on the remote to set this option as On or Off.

5.3 Software Upgrading

5.3.1 Description

2. An archive utility that supports the ZIP-format (e.g. Win Zip

for Windows or Stuff lt for Mac OS).

3. A USB flash drive (preferably empty).

Note:

1. Only FAT/DOS-formatted flash drives are supported.

2. Only use software update files that can be found on the

http://www.philips.com/support

web site.

5.3.3 Check the current TV software version

Before starting the software upgrade procedure, it is advised to check that what the current TV software:

1. Press the Menu button followed by “123654” buttons

consecutively on the remote control.

2. Use the up/down cursor keys to find the software version. If the current software version of the TV is the same as the latest update file found on http://www.philips.com/support not necessary to update the TV software.

5.3.4 Download the latest software

1. Point the web browser to http://www.philips.com/support

2. Find information and software related to the TV.

3. Select the latest software update file and download it to the

PC.

4. Insert a USB flash drive into one of the USB ports of the

PC.

5. Decompress the downloaded ZIP file and copy it to the root

directory of the USB flash drive.

5.3.5 Update the TV software

1. Unplug the mains power cord from your TV.

2. Insert the USB flash drive that contains the software

update files.

3. Press and hold the OK button.

Note: If the USB flash drive is not detected after power up, disconnect it and re-insert it.

4. Plug the mains power cord back in while holding the OK

button.

5. The led light will start to flash and blink.

6. The first time installation menu will appear.

7. Restart your TV. Your TV has now been updated.

Note:

• Do not remove the USB flash drive during the software

update.

• If a power failure occurs during the update, do not remove

the USB flash drive from the TV. The TV will continue the software update as soon as the power comes up again.

• If an error occurs during the update retry the procedure or

contact the dealer.

• We do not recommend downgrading to an older version.

• Once the upgrade is finished, use the PC to remove the TV

software from the USB portable memory.

, it is

It is possible for the user to upgrade the main software via the USB port. This allows replacement of a software image in a stand alone set. A description on how to upgrade the main software can be found in the DFU or on the Philips website.

5.3.2 Introduction

Philips continuously tries to improve its products, and it’s recommend that the TV software is updated when updates are available. Software update files can be obtained from the dealer or can be downloaded from the following websites:

http://www.philips.com/support

Preparing a portable memory for software upgrade

The following requirements have to be met:

1. A personal computer connected to the Internet.

5.3.6 How to Copy NVM Data to/from USB

Note: This function is only valid for hotel TV. Copy to USB

There are two steps and both are independent of each other. For welcome image downloading to USB, there should be DowmloadWelcomeScreen.mb82 file in USB ROOT. Copy the updated welcome image to USB in directory “welcome_image” as “hotel_wel.png”. Copy NVRAM data (service list, preferences, etc.) to USB device. On Phoenix platform, all NVRAM data is stored in

8x32KB Flash files named as “nvblock_... .bin”. When “Copy to

USB” is selected, those files are copied from TV to USB. Then they can be used for various purposes such as testing on another TV or testing/debugging on observatory etc. Note that USB should be plugged before this operation. A new folder will

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Service Modes and Fault Finding

be created in the USB with every operation of “Copy to USB”. Folder names will automatically increase like CLONE00001, CLONE00002, etc. (up to 99999)

Copy from USB

There are two steps and both are independent of each other. If there is file named “hotel_wel.png” in directory “welcome_image”. It is copied to TV to use as welcome image. Copy from USB device data to NVRAM. Just the reverse operation done by copy to USB call. Previously copied NVRAM files (Flashx.bin) are copied into TV. If there is no flash file or some of them are available on USB, the available ones are copied. If no USB is connected, nothing happens. Note: For Clone function USB stick (Copy to USB - Copy from USB) must be formatted to FAT32. If USB is not formatted to FAT32 the other TVs will not accept cloned data and performance issues will result

5.3.7 How to Edit S/N(Serial Number) & Model Number

Uploading Procedure To TV

Create “SerialNoModelNo.txt” file in an USB stick. Write the informations below on this text file. SerialNo: xxx ModelNo: yyy Then apply USB operations. Power on/off.

Downloading Procedure From TV

Create “DownloadSerialModelNo.txt” file in an empty USB stick. Apply USB operations. After you applied USB operations, “SerialNoModelNo.txt” file will be created automatically in the USB stick.

figure 10-4-1

B01, DVB-T/C - CI Interface - USB- Active

Antenna - Led.

5.4.6 Loudspeakers

Make sure that the volume is set to minimum during disconnecting the speakers in the ON-state of the TV. The audio amplifier can be damaged by disconnecting the speakers during ON-state of the set!

5.4.7 Display Option Code

This chassis does not use display option codes.

5.4.8 Staying in Stand-by Mode

This problem indicates a short on V

voltages. Protect pin

should be logic high while normal operation. When there is a short circuit protect pin will be logic low. If you detect logic low on protect pin, unplug the TV set and control voltage points with a multi-meter to find the shorted voltage to ground.

5.4.9 IR Problem

Check LED card supply on MB82S chassis.

5.4.10 No Signal Problem

Check tuner supply voltage; 5V_VCC, 3V3_TUNER and VDD_1.8. Check tuner options are correctly set in Service menu. Check AGC voltage at IF_AGC pin of tuner.

5.4 Fault Finding and Repair Tips

Note:

• It is assumed that the components are mounted correctly with correct values and no bad solder joints.

• Before any fault finding actions, check if the correct options are set.

5.4.1 LED Blinking problem

When the front LED blinks it indicates that the SSB has gone in protection mode. In the possibility of a short circuit, the LED light will blink at a 1 to 2 Hz frequency. It will continue to blink even after rebooting and until proper repairs are made. Check the DC-DC sections of the SSB as well as the power supply unit.

5.4.2 No Backlight Problem.

Backlight pin, dimming pin, backlight supply, stby on/off pin “backlight_on/off” pin should be “high” when the backlight is “on”. Q30 connector pin must be “low” when the backlight is “off”. If it is a problem, please check Q30 and the panel cables. Also it can be tested in TP7 in main board. See figure 10-4-2

B02, MEDIATEK Main IC, Keyboar 3 Way Switch.

5.4.3 No Picture via HDMI input

Check if HDCP key is valid. This can be done in CSM.

5.4.11 Remote Control Incompatibility

This TV set requires the original remote control that it was shipped with. Only the original remote control guarantees full compatibility and operation and a healthy service operation.

5.4.4 TV Will Not Start-up from Stand-by

Possible Stand-by Controller failure. Re flash the SW.

5.4.5 CI Module Problem

Supply, supply control pin, detect pins, mechanical positions of pins.CI supply should be 5V when CI module inserted. If it is not 5V please check CI_PWR_EN, this pin should be low. See

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6. Alignments

Index of this chapter:

6.1

General Alignment Conditions

6.2 Hardware Alignments

6.3 Software Alignments

6.4 White Point Alignments

6.1 General Alignment Conditions

Perform all electrical adjustments under the following conditions:

• Power supply voltage: 90 - 264 V

• Connect the set to the mains via an isolation transformer

with low internal resistance.

• Allow the set to warm up for approximately 15 minutes.

• Measure voltages and waveforms in relation to correct

ground (e.g. measure audio signals in relation to AUDIO_GND). Caution: It is not allowed to use heat sinks as ground.

• Test probe: R

> 10 M, Ci < 20 pF.

6.2 Hardware Alignments

Not applicable.

6.3 Software Alignments

Not applicable.

6.4 White Point Alignments

Steps for white point alignment are listed below

• Run the PC

• Connect the USB cable of DB07 board.

• Run the video pattern generator, adjust %80 white pattern.

• Run the color Analyzer CA210, make the CAL the probe.

Calibration steps

• Select the CAL position on the probe.

• Press button 0-CAL.

• Wait 5 seconds.

• Select MEAS position on the probe.

• Wait a minimum of 15 mins, avg. time is 45 mins.

• Connect the scart cable to TV.

, 50/ 60  3 Hz.

Alignments

• Place the probe across the display (center position, 0.5 cm

at 90 degrees.

• Check the PC, select the COM port.

• Select the model type OEM.dat.

• Press the START button.

• Wait for the software to set all modes (normal, cool, warm)

• Wait for the OK-READY sign.

If you don’t have a colour analyser, you can use the default values. This is the next best solution.

6.5 White Point Alignments

If you don’t have a colour analyser, you can use the default values. This is the next best solution.

• Run the PC

• Connect the USB cable of DB07 board.

• Run the video pattern generator, adjust %80 white pattern.

• Run the color Analyzer CA210, make the CAL the probe.

Calibration steps

• Select the CAL position on the probe.

• Press button 0-CAL.

• Wait 5 seconds.

• Select MEAS position on the probe.

• Wait a minimum of 15 mins, avg. time is 45 mins.

• Connect the scart cable to TV.

• Place the probe across the display (center position, 0.5 cm

at 90 degrees.

• Check the PC, select the COM port.

• Select the model type OEM.dat.

• Press the START button.

• Wait for the software to set all modes (normal, cool, warm)

• Wait for the OK-READY sign.

Table 6-1 Default White Point Alignment Values

EN 19VEM14.1E_LA 6.

Value COOL NORMAL WARM

X 0.274+/-(0.008) 0.287+/-(0.008) 0.313+/-(0.008)

Y 0.280+/-(0.008) 0.295+/-(0.008) 0.329+/-(0.008)

If you don’t have a colour analyser, you can use the default values. This is the next best solution.

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EN 20 VEM14.1E_LA7.

7. Circuit Descriptions

Index of this chapter:

7.1

Introduction

7.2 Power Supply

7.3 Power Management

7.4 Circuit Description

Notes:

• Only new circuits (circuits that are not published recently) are described.

• Figures can deviate slightly from the actual situation, due to different set executions.

• For a good understanding of the following circuit descriptions, please use the wiring, block (see chapter

Block Diagrams) and circuit diagrams (see chapter

10.

Circuit Diagrams and PWB Layouts).Where necessary,

you will find a separate drawing for clarification.

7.1 Introduction

VEM14.1E LA main board is driven by Mediatek SOC. This IC is a single chip IDTV solution that supports channel decoding, MPEG decoding, and media-centre functionality enabled by a high performance AV CODEC and CPU.

• Combo Front-End Demodulator

• A multi-standard A/V format decoder

• The MACEpro video processor

• Home theatre sound processor

• Internet and Variety of Connectivity Support

• Multi-purpose CPU for OS and multimedia

• Peripheral and power management

Circuit Descriptions

7.1.1 VEM1.1E LA Architecture Overview

For details about the chassis block diagrams refer to chapter 9.

Block Diagrams.

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7.1.2 SSB Cell Layout (..H/12 series)

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Tuner

HDMI

DDR

Main IC

CI Socket

LVDS Sockets

DC-DC

Serial Flash

USB

Main IC Supplies

Audio Amp

Side

Sockets

Circuit Descriptions

EN 21VEM14.1E_LA 7.

Figure 7-1 SSB layout cells (top view)

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