Philips Q552.2E LA Service manual

Colour Television Chassis

19100_000_110214.eps

110214

Q552.2E

Contents Page Contents Page

1. Revision List 2

2. Technical Specifications, Diversity, and Connections2

3. Precautions, Notes, and Abbreviation List 6

4. Mechanical Instructions 10

5. Service Modes, Error Codes, and Fault Finding 17

6. Alignments 36

7. Circuit Descriptions 40

8. IC Data Sheets 46

9. Block Diagrams Wiring diagram Blockbuster 32" 59 Wiring diagram Blockbuster 37" 60 Wiring diagram Blockbuster 40" 61 Block Diagram Video 62 Block Diagram Audio 63 Block Diagram Control & Clock Signals 64 Block Diagram I2C 65 Supply Lines Overview 66

10. Circuit Diagrams and PWB Layouts Drawing B01 393912364954 B02 393912364954 78 B03 393912364954 87 B04 393912364954 95 B05 393912364954 100 B06 393912364954 101 B07 393912364954 105 B08 393912364954 106 B09 393912364954 108 313912364954 SSB Layout 109 E 27221719026x IR/LED/Key Board 111

11. Styling Sheets Blockbuster 32" 112 Blockbuster 37" 113 Blockbuster 40"& 46" 114

Copyright 2011 Koninklijke Philips Electronics N.V. 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 ER/TY 1162 BU TV Consumer Care, the Netherlands Subject to modification EN 3122 785 19100

2011-Feb-18

EN 2 Q552.2E LA1.

Revision List

1. Revision List

Manual xxxx xxx xxxx.0

• First release.

2. Technical Specifications, Diversity, and Connections

Index of this chapter:

2.1 Technical Specifications

2.2 Directions for Use

2.3 Connections

2.4 Chassis Overview

Notes:

• Figures can deviate due to the different set executions.

• Specifications are indicative (subject to change).

Table 2-1 Described Model Numbers and Diversity

SSB 2 4 7 9 10

Mechanics Descriptions

CTN Styling

32PFL6606H/12 Blockbuster

32PFL6606K/02 Blockbuster

37PFL6606H/12 Blockbuster

37PFL6606K/02 Blockbuster

40PFL6606H/12 Blockbuster

40PFL6606K/02 Blockbuster

11-1

11-2

11-3

3139 123 xxxxx

Connection Overview

Wire Dressing

Assembly Removal

LCD Removal

PSU

64954 2.3 4-1 4.3 4.3.8 7.2 7.4.1 - - 9-1 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -

64954 2.3 4-2 4.3 4.3.8 7.2 7.4.1 - - 9-2 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -

64954 2.3 4-3 4.3 4.3.8 7.2 7.4.1 - - 9-3 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -

Tuner

2.1 Technical Specifications

For on-line product support please use the CTN links in Table

2-1. Here is product information available, as well as getting

started, user manuals, frequently asked questions and software & drivers.

Schematics

TCON

Wiring Diagram

ALxx (Ambilight) LiteOn

ALxx (Ambilight) Everlight

B01 (Tuner)

B02 (PNX85500)

B03 (DC/DC / Class D)

B04 (I/O)

B05 (DDR)

B06 (non-DVBS-LVDS)

B07 (DVBS-FE)

B08 (DVBS-Supp.)

B09 (non-DVBS-conn.)

E (IR/LED/Key Board)

AmbiLight

2.2 Directions for Use

You can download this information from the following websites:

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

2011-Feb-18

back to

div. table

2.3 Connections

REAR CONNECTORS

BOTTOM REAR CONNECTORS

SIDE CONNECTORS

19100_043_110214.eps

110216

6 7 8 9 10 11

Technical Specifications, Diversity, and Connections

EN 3Q552.2E LA 2.

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 Rear Connections

1 - EXT1: Video RGB - In, CVBS - In/Out, Audio - In/Out

10000_001_090121.eps

Figure 2-2 SCART connector

1 - Audio R 0.5 V 2 - Audio R 0.5 V 3 - Audio L 0.5 V 4 - Ground Audio Gnd H 5 - Ground Blue Gnd H 6 - Audio L 0.5 V 7 - Video Blue 0.7 V 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 12 - n.c.

Figure 2-1 Connection overview

090121

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 75 ohm jk

/ 75 ohm j

back to

div. table

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

17 - Ground Video Gnd H 18 - Ground FBL Gnd H 19 - Video CVBS/Y 1 V 20 - Video CVBS 1 V 21 - Shield Gnd H

2 - Service Connector (UART)

1 - Ground Gnd H 2 - UART_TX Transmit k 3 - UART_RX Receive j

3 - EXT2: Cinch: Video YPbPr - In, Audio - In

Gn -Video Y 1 V Bu - Video Pb 0.7 V Rd - Video Pr 0.7 V Rd - Audio - R 0.5 V Wh - Audio - L 0.5 V

4 - Cinch: Audio - In (VGA/DVI)

Rd - Audio R 0.5 V Wh - Audio L 0.5 V

5 - SAT - In

- - F-type Coax, 75 ohm D

/ 75 ohm j

1 - 3 V: EXT / 75 ohm j

/ 75 ohm k

/ 75 ohm j

/ 75 ohm jq

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

2011-Feb-18

EN 4 Q552.2E LA2.

1123 45678

10000_025_090121.eps

090121

10000_017_090121.eps

090428

18 2

10000_017_090121.eps

090428

18 2

10000_002_090121.eps

090127

10000_049_100210.eps

100210

GND

DAT3/CS

CMD/DI

GND1

VDD

CLOCK

GND2

DAT0/D0

DAT1/IRQ

DAT2/NC

Technical Specifications, Diversity, and Connections

2.3.2 Rear Connections - Bottom

6 - RJ45: Ethernet

Figure 2-3 Ethernet connector

1 - TD+ Transmit signal k 2 - TD- Transmit signal k 3 - RD+ Receive signal j 4 - CT Centre Tap: DC level fixation 5 - CT Centre Tap: DC level fixation 6 - RD- Receive signal j 7 - GND Gnd H 8 - GND Gnd H

7 - Cinch: S/PDIF - Out

Bk - Coaxial 0.4 - 0.6V

/ 75 ohm kq

8 - HDMI 2: Digital Video, Digital Audio - In

Figure 2-4 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 - n.c. 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

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

10 - Aerial - In

- - IEC-type (EU) Coax, 75 ohm D

11 - VGA: Video RGB - In

Figure 2-6 VGA Connector

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

/ 75 ohm 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 - n.c. 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

2.3.3 Side Connections

12 - Common Interface

68p - See diagram B01A Common Interface

13 - SD-Card: Secure Digital Card - In/Out (optional)

9 - HDMI 1: Digital Video - In, Digital Audio with ARC - In/ Out

2011-Feb-18

12 - CLK- Data channel j

Figure 2-5 HDMI (type A) connector

back to

div. table

Figure 2-7 SD-Card connector

1 - DAT3/CS Signal jk 2 - CMD/DI Signal k 3 - GND1 Gnd H 4 - Vdd Supply k 5 - CLOCK Signal k 6 - GND2 Gnd H 7 - DAT0/D0 Signal jk 8 - DAT1/IRQ Signal jk 9 - DAT2/NC Signal jk 10 - CD Signal j 11 - GND Gnd H

Technical Specifications, Diversity, and Connections

1 2 3 4

10000_022_090121.eps

090121

EN 5Q552.2E LA 2.

12 - WP Signal j 13 - GND Gnd H 14 - GND Gnd H

14 - USB2.0

Figure 2-8 USB (type A)

2.4 Chassis Overview

Refer to chapter Block Diagrams for PWB/CBA locations.

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

15 - Head phone (Output)

Bk - Head phone 32 - 600 ohm / 10 mW ot

16 - HDMI : Digital Video, Digital Audio - In

See 8 - HDMI 2: Digital Video, Digital Audio - In

back to

div. table

2011-Feb-18

EN 6 Q552.2E LA3.

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.

• 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.

-9

), or pico-farads (p 10

. Select

-12

-6

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).

2011-Feb-18

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”.

back to

div. table

Precautions, Notes, and Abbreviation List

EN 7Q552.2E LA 3.

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 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. AG is Bruges), 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 2006 week 17). The 6 last digits contain the serial number.

MODEL :

PROD.NO:

32PF9968/10

AG 1A0617 000001

MADE IN BELGIUM

220-240V 50/60Hz

VHF+S+H+UHF

10000_024_090121.eps

BJ3.0E LA

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.

128W

100105

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

back to

div. table

2011-Feb-18

EN 8 Q552.2E LA3.

Precautions, Notes, and Abbreviation List

DFU Directions For Use: owner's manual DMR Digital Media Reader: card reader DMSD Digital Multi Standard Decoding DNM Digital Natural Motion 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.

2011-Feb-18

back to

div. table

SDI), is a digitized video format used for broadcast grade video. Uncompressed digital component or digital composite signals can be used. 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

Index of this chapter:

4.1 Cable Dressing Blockbuster Styling (xxPFL66xx/xx series)

4.2 Service Positions

4.3 Assy/Panel Removal Sundance Styling (xxPFL76xx/xx series)

4.4 Set Re-assembly

Notes:

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

4.1 Cable Dressing Blockbuster Styling (xxPFL66xx/xx series)

2011-Feb-18

Figure 4-1 Cable dressing 32PFL6606x/xx (Blockbuster)

back to

div. table

Mechanical Instructions

19100_045_110214.eps

110214

EN 11Q552.2E LA 4.

Figure 4-2 Cable dressing 37PFL6606x/xx (Blockbuster)

back to

div. table

2011-Feb-18

EN 12 Q552.2E LA4.

19100_046_110214.eps

110214

19100_04

8_110216.eps

110216

1 1

Mechanical Instructions

Figure 4-3 Cable dressing 40PFL6606x/xx (Blockbuster)

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 Assy/Panel Removal Sundance Styling (xxPFL76xx/xx series)

The instructions in this section also apply to the Blockbuster sets (xxPFL66xx/xx series).

For the 40" and 46" Blockbuster sets, additional instructions (rear cover removal) apply. Refer to subsection Additional

instructions for Blockbuster 40-/46PFL6606x/xx.

The instructions apply to the 32PFL7406K/02.

4.3.1 Rear Cover

1. Remove all screws of the rear cover.

2. Lift the rear cover from the TV. Make sure that wires and flat coils are not damaged while lifting the rear cover from the set.

Additional instructions for Blockbuster 40-/46PFL6606x/xx

40"and 46"Blockbuster (40-/46PFL6606x/xx) sets have a dedicated method to open the bottom catches when removing the rear cover. Refer to Figure 4-4

and Figure 4-5 for details.

Figure 4-4 Bottom catches 40" and 46" Blockbuster sets -1-

Warning: Disconnect the mains power cord before you remove

the rear cover. Note: it is not necessary to remove the stand while removing the rear cover.

2011-Feb-18

back to

div. table

Figure 4-5 Bottom catches 40" and 46" Blockbuster sets -2-

19100_049_110216.eps

110216

19100_047_110216.eps

110216

19100_050_110216.eps

110216

19100_051_110216.eps

110216

It is advised to lay the set with front facing down before executing this operation.

1. Remove all screws from the rear cover.

2. Use a round rod (diameter 2 mm) and insert it in one of the holes [1].

3. Push the catch located inside the rear cover away by inserting the rod [2] through the hole and lifting the rear cover at the same time.

4. Repeat the same procedure on the other hole.

Mechanical Instructions

1. Unplug all connectors [1].

2. Remove the fixation screws [2].

3. Take the board out. When defective, replace the whole unit.

EN 13Q552.2E LA 4.

Figure 4-7 Main Power Supply

4.3.2 Speakers

Tweeters

Each tweeter unit is mounted with one screw. When defective, replace the whole unit.

Subwoofer

The central subwoofer is located in the centre of the set and is secured by two bosses. When defective, replace the whole unit.

4.3.3 Mains Switch

Refer to Figure 4-6

for details.

4.3.5 Small Signal Board (SSB)

Refer to Figure 4-8

for details.

Figure 4-8 SSB

1. Unplug all connectors [1].

2. Remove the fixation screws [2].

3. Take the board out.

Figure 4-6 Mains switch

When remounting, ensure that the side shielding [3] is positioned correctly.

The mains switch is mounted on a plastic subframe and can be removed without removing the subframe.

1. Use a screwdriver and push the switch out of its casing [1].

2. Unplug the connectors [2].

When defective, replace the whole unit.

4.3.4 Main Power Supply

Refer to Figure 4-7

for details.

back to

div. table

2011-Feb-18

EN 14 Q552.2E LA4.

19100_052_110216.eps

110216

19100_054_110216.eps

110216

Mechanical Instructions

4.3.6 Keyboard Control, IR & LED Board

Refer to Figure 4-9

and Figure 4-10 for details.

Figure 4-9 Keyboard control, IR & LED board [1/2]

4.3.7 Ambilight Units

The Ambilight units can be lifted from the subframes without the use of tools. Refer to Figure 4-11

for details.

Figure 4-11 Ambilight units

1. Unplug the connector [1].

2. Carefully lift the board [2] and take the board out. When defective, replace the whole unit.

2 2

19100_053_110216.eps

Figure 4-10 Keyboard control, IR & LED board [2/2]

1. Remove the stand and the plastic support [1].

2. Unplug the connector [2].

3. Remove the screws [3] and take the board out. When defective, replace the whole unit.

110216

2011-Feb-18

back to

div. table

4.3.8 LCD Panel

19100_055_110216.eps

110216

4 4 4 4

19100_056_110217.eps

110217

Mechanical Instructions

EN 15Q552.2E LA 4.

Refer to Figure 4-12

and Figure 4-13 for details.

Figure 4-12 LCD panel [1/2]

1. Remove the SSB as described earlier.

2. Remove the PSU as described earlier.

3. Remove the tweeters with their subframes and subwoofer as described earlier.

4. Remove the stand and -support as described earlier.

5. Remove the cables [1].

6. Remove the stand subframe [2].

7. Remove the mains switch subframe [3].

8. Remove the Ambilight units together with their subframes as described earlier.

9. Unplug the connector from the keyboard control-, and IR & LED board as described earlier.

10. Remove all remaining cables and subframes.

11. Use a screwdriver to release the clamps [4] that secure the panel and take the panel out.

Remove the clamps from the panel before sending the panel in for Service.

Figure 4-13 LCD panel [2/2]

back to

div. table

2011-Feb-18

EN 16 Q552.2E LA4.

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.

• Pay special attention not to damage the EMC foams in the set. Ensure that EMC foams are mounted correctly.

Mechanical Instructions

2011-Feb-18

back to

div. table

Service Modes, Error Codes, and Fault Finding

19100_057_110217.eps

110217

SDM

5. Service Modes, Error Codes, and Fault Finding

EN 17Q552.2E LA 5.

Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Stepwise Start-up

5.4 Service Tools

5.5 Error Codes

5.6 The Blinking LED Procedure

5.7 Protections

5.8 Fault Finding and Repair Tips

5.9 Software Upgrading

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, which can be controlled via ComPair. In this way it is possible to determine which part is defective.

Perform measurements under the following conditions:

• Service Default Mode.

• Video: Colour bar signal.

• Audio: 3 kHz left, 1 kHz right.

5.2 Service Modes

Service Default mode (SDM) and Service Alignment Mode (SAM) offers several features for the service technician, while the Customer Service Mode (CSM) is used for communication between the call centre and the customer.

• All service-unfriendly modes (if present) are disabled, like: – (Sleep) timer. – Child/parental lock. – Picture mute (blue mute or black mute). – Automatic volume levelling (AVL). – Skip/blank of non-favourite pre-sets.

How to Activate SDM

For this chassis there are two kinds of SDM: an analogue SDM and a digital SDM. Tuning will happen according Table 5-1

• Analogue SDM: use the standard RC-transmitter and key in the code “062596”, directly followed by the “MENU” (or “HOME”) button. Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” (or "HOME") button again. Analogue SDM can also be activated by grounding for a moment the solder path on the SSB, with the indication “SDM” (see Service mode pad

• Digital SDM: use the standard RC-transmitter and key in the code “062593”, directly followed by the “MENU” (or "HOME") button. Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” (or "HOME") button again.

This chassis also offers the option of using ComPair, a hardware interface between a computer and the TV chassis. It offers the abilities of structured troubleshooting, error code reading, and software version read-out for all chassis. (see also section “5.4.1 ComPair

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 Service Default Mode (SDM)

Purpose

• To create a pre-defined setting, to get the same measurement results as given in this manual.

• To override SW protections detected by stand-by processor and make the TV start up to the step just before protection (a sort of automatic stepwise start-up). See section “5.3 Stepwise Start-up

• To start the blinking LED procedure where only LAYER 2 errors are displayed. (see also section “5.5 Error Codes

Specifications

Table 5-1 SDM default settings

Region Freq. (MHz)

Europe, AP(PAL/Multi) 475.25 PAL B/G

Europe, AP DVB-T 546.00 PID

• All picture settings at 50% (brightness, colour, contrast).

• Sound volume at 25%.

”).

”.

Video: 0B 06 PID PCR: 0B 06 PID Audio: 0B 07

Default system

DVB-T

”).

Figure 5-1 Service mode pad

After activating this mode, “SDM” will appear in the upper right corner of the screen (when a picture is available).

How to Navigate

When the “MENU” (or “HOME”) button is pressed on the RC transmitter, the TV set will toggle between the SDM and the normal user menu.

How to Exit SDM

Use one of the following methods:

• Switch the set to STAND-BY via the RC-transmitter.

• Via a standard customer RC-transmitter: key in “00”sequence.

5.2.2 Service Alignment Mode (SAM)

Purpose

• To perform (software) alignments.

• To change option settings.

• To easily identify the used software version.

• To view operation hours.

• To display (or clear) the error code buffer.

How to Activate SAM

Via a standard RC transmitter: Key in the code “062596” directly followed by the “INFO” or “OK” button. After activating SAM with this method a service warning will appear on the screen, continue by pressing the “OK” button on the RC.

back to

div. table

2011-Feb-18

EN 18 Q552.2E LA5.

10000_038_090121.eps

090819

PHILIPS

MODEL:

32PF9968/10

PROD.SERIAL NO:

AG 1A0620 000001

040

39mm

27mm

(CTN Sticker)

Display Option

Code

Contents of SAM

• Hardware Info.

• Operation Hours. Displays the accumulated total of

• Errors (followed by maximum 10 errors). The most recent

• Reset Error Buffer. When “cursor right” (or “OK” button)

• Alignments. This will activate the “ALIGNMENTS” sub-

• Dealer Options. Extra features for the dealers.

• Options. Extra features for Service. For more info

• Initialize NVM. The moment the processor recognizes a

Note: When the NVM is corrupted, or replaced, there is a high possibility that no picture appears because the display code is not correct. So, before initializing the NVM via the SAM, a picture is necessary and therefore the correct display option has to be entered. Refer to Chapter 6. Alignments To adapt this option, it’s advised to use ComPair (the correct values for the options can be found in Chapter 6. Alignments or a method via a standard RC (described below). Changing the display option via a standard RC: Key in the code “062598” directly followed by the “MENU” (or "HOME") button and “XXX” (where XXX is the 3 digit decimal display code as mentioned on the sticker in the set). Make sure to key in all three digits, also the leading zero’s. If the above action is successful, the front LED will go out as an indication that the RC sequence was correct. After the display option is changed in the NVM, the TV will go to the Stand-by mode. If the NVM was corrupted or empty before this action, it will be initialized first (loaded with default values). This initializing can take up to 20 seconds.

How to Navigate

• In SAM, the menu items can be selected with the

2011-Feb-18

Service Modes, Error Codes, and Fault Finding

– A. SW Version. Displays the software version of the

main software (example: Q555X-1.2.3.4 = AAAAB_X.Y.W.Z).

• AAAA= the chassis name.

• B= the SW branch version. This is a sequential number (this is no longer the region indication, as the software is now multi-region).

• X.Y.W.Z= the software version, where X is the main version number (different numbers are not compatible with one another) and Y.W.Z is the sub version number (a higher number is always compatible with a lower number).

– B. STBY PROC Version. Displays the software

version of the stand-by processor.

– C. Production Code. Displays the production code of

the TV, this is the serial number as printed on the back of the TV set. Note that if an NVM is replaced or is initialized after corruption, this production code has to be re-written to NVM. ComPair will foresee in a possibility to do this.

operation hours (not the stand-by hours). Every time the TV is switched “on/off”, 0.5 hours is added to this number.

error is displayed at the upper left (for an error explanation see section “5.5 Error Codes

pressed here, followed by the “OK” button, the error buffer is reset.

menu. See Chapter 6. Alignments

regarding option codes, see chapter 6. Alignments Note that if the option code numbers are changed, these have to be confirmed with pressing the “OK” button before the options are stored, otherwise changes will be lost.

corrupted NVM, the “initialize NVM” line will be highlighted. Now, two things can be done (dependent of the service instructions at that moment): – Save the content of the NVM via ComPair for

development analysis, before initializing. This will give the Service department an extra possibility for diagnosis (e.g. when Development asks for this).

– Initialize the NVM.

”).

for details.

)

div. table

Figure 5-2 Location of Display Option Code sticker

• Store - go right. All options and alignments are stored when pressing “cursor right” (or the “OK” button) and then the “OK”-button.

• Operation hours display. Displays the accumulated total of operation hours of the screen itself. In case of a display replacement, reset to “0” or to the consumed operation hours of the spare display.

• SW Maintenance. – SW Events. In case of specific software problems, the

development department can ask for this info.

– HW Events. In case of specific software problems, the

development department can ask for this info :

- Event 26: refers to a power dip, this is logged after the TV set reboots due to a power dip.

- Event 17: refers to the power OK status, sensed even before the 3 x retry to generate the error code.

• Test settings. For development purposes only.

• Development file versions. Not useful for Service purposes, this information is only used by the development department.

• Upload to USB. To upload several settings from the TV to an USB stick, which is connected to the SSB. The items are “Channel list”, “Personal settings”, “Option codes”, “Alignments”, “Identification data” (includes the set type and prod code + all 12NC like SSB, display, boards), “History list”. The “All” item supports to upload all several items at once.

First a directory “repair\” has to be created in the root of the USB stick.

To upload the settings, select each item separately, press “cursor right” (or the “OK” button), confirm with “OK” and wait until the message “Done” appears. In case the download to the USB stick was not successful, “Failure” will be displayed. In this case, check if the USB stick is connected properly and if the directory “repair” is present in the root of the USB stick. Now the settings are stored onto the USB stick and can be used to download into another TV or other SSB. Uploading is of course only possible if the software is running and preferably a picture is available. This method is created to be able to save the customer’s TV settings and to store them into another SSB.

• Download from USB. To download several settings from the USB stick to the TV, same way of working needs to be followed as described in “Upload to USB”. To make sure that the download of the channel list from USB to the TV is executed properly, it is necessary to restart the TV and tune to a valid preset if necessary. The “All” item supports to download all several items at once.

• NVM editor. For NET TV the set “type number” must be entered correctly. Also the production code (AG code) can be entered here via the RC-transmitter. Correct data can be found on the side/rear sticker.

“CURSOR UP/DOWN” key on the RC-transmitter. The selected item will be highlighted. When not all menu items

back to

Service Modes, Error Codes, and Fault Finding

EN 19Q552.2E LA 5.

fit on the screen, move the “CURSOR UP/DOWN” key to display the next/previous menu items.

• With the “CURSOR LEFT/RIGHT” keys, it is possible to: – (De) activate the selected menu item. – (De) activate the selected sub menu.

• With the “OK” key, it is possible to activate the selected action.

How to Exit SAM

Use one of the following methods:

• Switch the TV set to STAND-BY via the RC-transmitter.

• Via a standard RC-transmitter, key in “00” sequence, or select the “BACK” key.

5.2.3 Customer Service Mode (CSM)

Purpose

When a customer is having problems with his TV-set, he can call his dealer or the Customer Helpdesk. The service technician can then ask the customer to activate the CSM, in order to identify the status of the set. Now, the service technician can judge the severity of the complaint. In many cases, he can advise the customer how to solve the problem, or he can decide if it is necessary to visit the customer. The CSM is a read only mode; therefore, modifications in this mode are not possible.

When in this chassis CSM is activated, a test pattern will be displayed during 5 seconds (1 second Blue, 1 second Green and 1 second Red, then again 1 second Blue and 1 second Green). This test pattern is generated by the PNX51X0 (located on the 200Hz board as part of the display). So if this test pattern is shown, it could be determined that the back end video chain (PNX51X0 and display) is working.For TV sets without the PNX51X0 inside, every menu from CSM will be used as check for the back end chain video.

When CSM is activated and there is a USB stick connected to the TV set, the software will dump the CSM content to the USB stick. The file (CSM_model number_serial number.txt) will be saved in the root of the USB stick. This info can be handy if no information is displayed.

When in CSM mode (and a USB stick connected), pressing “OK” will create an extended CSM dump file on the USB stick. This file (Extended_CSM_model number_serial number.txt) contains:

• The normal CSM dump information,

• All items (from SAM “load to USB”, but in readable format),

• Operating hours,

• Error codes,

• SW/HW event logs.

To have fast feedback from the field, a flashdump can be requested by development. When in CSM, push the “red” button and key in serial digits ‘2679’ (same keys to form the word ‘COPY’ with a cellphone). A file “Dump_model number_serial number.bin” will be written on the connected USB device. This can take 1/2 minute, depending on the quantity of data that needs to be dumped.

Also when CSM is activated, the LAYER 1 error is displayed via blinking LED. Only the latest error is displayed (see also section 5.5 Error Codes

How to Activate CSM

Key in the code “123654” via the standard RC transmitter. Note: Activation of the CSM is only possible if there is no (user) menu on the screen!

How to Navigate

By means of the “CURSOR-DOWN/UP” knob on the RCtransmitter, can be navigated through the menus.

back to

div. table

Contents of CSM

The contents are reduced to 3 pages: General, Software versions and Quality items. The group names itself are not shown anywhere in the CSM menu.

General

• Set Type. This information is very helpful for a helpdesk/ workshop as reference for further diagnosis. In this way, it is not necessary for the customer to look at the rear of the TV-set. Note that if an NVM is replaced or is initialized after corruption, this set type has to be re-written to NVM. ComPair will foresee in a possibility to do this. The update can also be done via the NVM editor available in SAM.

• Production Code. Displays the production code (the serial number) of the TV. Note that if an NVM is replaced or is initialized after corruption, this production code has to be re-written to NVM. ComPair will foresee in a possibility to do this. The update can also be done via the NVM editor available in SAM.

• Installed date. Indicates the date of the first installation of the TV. This date is acquired via time extraction.

• Options 1. Gives the option codes of option group 1 as set in SAM (Service Alignment Mode).

• Options 2. Gives the option codes of option group 2 as set in SAM (Service Alignment Mode).

• 12NC SSB. Gives an identification of the SSB as stored in NVM. Note that if an NVM is replaced or is initialized after corruption, this identification number has to be re-written to NVM. ComPair will foresee in a possibility to do this. This identification number is the 12nc number of the SSB.

• 12NC display. Shows the 12NC of the display.

• 12NC supply. Shows the 12NC of the power supply.

• 12NC 200Hz board. Shows the 12NC of the 200Hz Panel (when present).

• 12NC AV PIP. Shows the 12NC of the AV PIP board (when present).

Software versions

• Current main SW. Displays the build-in main software version. In case of field problems related to software, software can be upgraded. As this software is consumer upgradeable, it will also be published on the Internet. Example: Q55xx1.2.3.4

• Stand-by SW. Displays the build-in stand-by processor software version. Upgrading this software will be possible via ComPair or via USB (see section 5.9 Software

Upgrading).

Example: STDBY_83.84.0.0.

• e-UM version. Displays the electronic user manual SWversion (12NC version number). Most significant number here is the last digit.

• AV PIP software.

• 3D dongle software version.

Quality items

• Signal quality. Bad / average /good (not for DVB-S).

• Ethernet MAC address. Displays the MAC address present in the SSB.

• Wireless MAC address. Displays the wireless MAC address to support the Wi-Fi functionality.

• BDS key. Indicates if the set is in the BDS status.

• CI module. Displays status if the common interface module is detected.

• CI + protected service. Yes/No.

• Event counter : S : 000X 0000(number of software recoveries : SW EVENT-LOG #(reboots) S : 0000 000X (number of software events : SW EVENTLOG #(events) H : 000X 0000(number of hardware errors) H : 0000 000X (number of hardware events : SW EVENTLOG #(events).

2011-Feb-18

EN 20 Q552.2E LA5.

18770_250_100216.eps

100402

Active

Semi St by

St by

Mains

off

GoToProtection

-WakeUp requested

-Acquisition needed

-Tact switch pushed

- stby requested and no data Acquisition required

- St by requested

-tact SW pushed

WakeUp

requested

Protection

WakeUp

requested

(SDM)

GoToProtection

Hibernate

-Tact switch pushed

-last status is hibernate after mains ON

Tact switch

pushed

Service Modes, Error Codes, and Fault Finding

How to Exit CSM

Press “MENU” (or "HOME") / “Back” key on the RC-transmitter.

5.3 Stepwise Start-up

When the TV is in a protection state due to an error detected by stand-by software (error blinking is displayed) and SDM is activated via shortcutting the SDM solder path on the SSB, the TV starts up until it reaches the situation just before protection. So, this is a kind of automatic stepwise start-up. In combination with the start-up diagrams below, you can see which supplies are present at a certain moment. Caution: in case the start-up in this mode with a faulty FET 7U0X is done, you can destroy all IC’s supplied by the +1V8 and +1v1, due to overvoltage (12V

on XVX-line). It is recommended to measure first the FET 7U0X or others FET’s on shortcircuit before activating SDM via the service pads.

The abbreviations “SP” and “MP” in the figures stand for:

• SP: protection or error detected by the Stand-by Processor.

• MP: protection or error detected by the MIPS Main

Processor.

Figure 5-3 Transition diagram

2011-Feb-18

back to

div. table

Service Modes, Error Codes, and Fault Finding

18770_251_100216.eps

100216

EJTAG probe

connected ?

Yes

Release AVC system reset

Feed warm boot script

Cold boot?

Yes

Set I²C slave address

of Standby µP to (A0h)

An EJTAG probe (e.g . WindPower ICE prob e) can be connected for Linux Kernel debugging purposes.

Detect EJTAG debug probe

(pulling pin of the probe interface to

ground by inserting EJTAG probe)

Release AVC system reset

Feed cold boot script

Release AVC system reset Feed initializing boot script

disable alive mechanism

Off

Standby Supply starts running.

All standby supply voltages become available.

st-by µP resets

Stand by or

Protection

Mains is applied

- Switch Audio-Reset high.

It is low in the standby mode if the standby

mode lasted longer than 10s.

start keyboard scanning, RC detection. Wake up reasons are

off.

If the protection state was left by short c ircuiting the

SDM pins, detection of a protection condition during

startup will stall the startup. Protection conditions in a

playing set will be ignored. The protection mode will

not be entered.

Detect2 is moved to an interrupt. To be checked if the detection on interrupt base is feasible or not or if we should stick to the standard 40ms interval.

+12V, +24Vs, AL and Bolt-on power

isswitched on, followed by the +1V2 DCDC converter

Enable the supply detection algorithm

Switch ON Platform and display supply by switching

LOW the Standby line.

Initialise I/O pins of the st-by µP:

- Switch reset-AVC LOW (reset state)

- Switch reset-system LOW (reset state)

- Switch reset-Ethernet LOW (reset state)

- Switch reset-USB LOW (reset state)

- Switch reset-DVBs LOW (reset state)

-keep Audio-reset and Audio-Mute-Up HIGH

Enable the DCDC converters

(ENABLE-3V3n LOW)

Detect2 high received

within 2 seconds?

12V error :

Layer1: 3

Layer2: 16

Enter protection

Yes

Wait 50ms

EN 21Q552.2E LA 5.

Figure 5-4 “Off” to “Semi Stand-by” flowchart (part 1)

back to

div. table

2011-Feb-18

EN 22 Q552.2E LA5.

18770_252_100216.eps

100216

Yes

MIPS reads the wake up reason

from standby µP.

Semi-Standby

initialize tuner and channel decoders

Initialize video processing IC’s

Initialize source selection

initialize AutoTV by triggering CHS AutoTV Init interface

3-th try?

Blink Code as

error code

Bootscript ready

in 1250 ms?

Yes

Enable Alive check mechanism

Wait until AVC starts to

communicate

SW initialization

succeeded

within 20s?

Switch StandbyI/O line high

and wait 4 seconds

RPC start (comm. protocol)

Set I²C slave address

of Standby µP to (60h)

Yes

Disable all supply related protections and

switch off the +3V3 +5V DC/DC converter.

switch off the remaining DC/DC

converters

Wait 5ms

Switch AVC PNX85500 in

reset (active low)

Wait 10ms

Flash to Ram

image transfer succeeded

within 30s?

Yes

Code =

Layer1: 2

Layer2: 53

Code =

Layer1: 2

Layer2: 15

Initialize Ambilight with Lights off.

Timing need to be updated if more mature info is available.

Timing needs to be updated if more mature info is available.

Initialize audio

Enter protection

Reset-system is switched HIGH by the

AVC at the end of t he bootscript

AVC releases Reset-Ether net, Reset-USB and

Reset-DVBs when the end of the AVC boot-

script is detected

This cannot be done through the bootscript, the I/O is on the standby µP

Reset-Audio and Audio-Mute-Up are

switched by MIPS code later on in the

startup process

Reset-system is switched HIGH by the

AVC at the end of the bootscript

Reset-Audio and Audio-Mute-Up a re

switched by MIPS code later on in the

startup process

Wake up reason

coldboot & not semi-

standby?

85500 sends out startup screen

Startup screen cfg file

present?

85500 starts up the display.

Startup screen visible

yes

To keep this flowchart readable, the exact display turn on description is not copied here. Please see the Semi-standby to On description for the detailed display startup

sequence.

During the complete display time of the Startup screen, the preheat condition of

100% PWM is valid.

Startup screen shall only be visible when there is a coldboot to an active state end situation. The startup screen shall not be visible when waking up for reboot reasons or waking up to semi- standby conditions or waking up to enter Hibernate mode..

The first time after the option turn on of the startup screen or when the set is virgin, the cfg file is not present and hence the startup screen will not be shown.

AVC releases Reset-Ethernet, Reset-USB and

Reset-DVBs when the end of the AVC boot-

script is detected

200Hz set?

yes

85500 sends out startup screen

200Hz Tcon has started up the

display.

Startup screen visible

85500 requests Lamp on

Service Modes, Error Codes, and Fault Finding

2011-Feb-18

Figure 5-5 “Off” to “Semi Stand-by” flowchart (part 2)

back to

div. table

Service Modes, Error Codes, and Fault Finding

18770_253_100216.eps

100216

Active

Semi Standby

Initialize audio and video

processing IC's and functions

according needed use case.

Assert RGB video blanking

and audio mute

Wait until previous on-state is left more than2

secondsago. (to prevent LCD display problems)

The assumption here is that a fast toggle (<2s) can

only happen during ON->SEMI ->ON. In these states,

the AVC is still active and can provide the 2s delay. A

transition ON->SEMI->STBY->SEMI->ON cannot be

made in less than 2s, because the standby state will

be maintained for at least 4s.

Switch Audio-Reset low and wait 5ms

Constraints taken into account:

-Display may only be started when valid LVDS output clock can be delivered by the AVC.

-To have a reliable operation of the EEFL backlight, the backlight should be driven with a maximum PWM duty cycle during the first seconds. Only after this first one or two seconds, the PWM may be set to the required output level (Note that the PWM output should be present b

efore the backlight is switched on). To minimize the artefacts,

the picture should only be unblanked after these first seconds.

Restore dimming backlight feature, PWM and BOOST output

and unblank the video.

Wait until valid and stable audio and video, corresponding to the

requested output is delivered by the AVC

AND

the backlight has been switched on for at least the time which is

indicated in the display file as preheat time.

The higher level requirement is that audio and video should be demuted without transient effects and that the audio should be demuted maximum 1s before or

at the same time as the unblanking of the video.

Release audio mute and wait 100ms before any other audio

handling is done (e.g. volume change)

CPipe already generates a valid output clock in the semi-standby state: display

startup can start immediately when leaving

the semi-standby state.

Switch on LCD backlight (Lamp-ON)

Switch off the dimming backlight feature, set

the BOOST control to nominal and make sure PWM output is set to maximum allowed PWM

Switch on the Ambilight functionality according the last status

settings.

Delay Lamp-on with the sum of the LVDS delay and

the Lamp delay indicated in the display file

Switch on the displaypowerby

switching LCD-PWR-ON low

Wait x ms

Switch on LVDS output in the 85500

The exact timings to

switch on the

display(LVDS

delay, lamp delay)

are defined in the

display file.

Start POK line

detection algorithm

return

Display already on?

(splash screen)

Yes

Display cfg file present

and up to date, according

correct display option?

Startup screen Option and Installation setting

Photoscreen ON?

Yes

Prepare Start screen Display config

file and copy to Flash

Yes

A LED set does not normally need a

preheat time. The preheat remains present

but is set to zero in the display file.

EN 23Q552.2E LA 5.

Figure 5-6 “Semi Stand-by” to “Active” flowchart (EEFL or LED backlight 50/100 Hz only)

back to

div. table

2011-Feb-18

EN 24 Q552.2E LA5.

18770_254_100216.eps

100216

Active

Semi Standby

Initialize audio and video

processing IC's and functions

according needed use case.

Assert RGB video blanking

and audio mute

Wait until previous on-state is left more than2

secondsago. (to prevent LCD display problems)

The assumption here is that a fast toggle (<2s)

can only happen during ON->SEMI ->ON. In

these states, the AVC is still active and can provide the 2s delay. If the transition ON->SEMI- >STBY->SEMI->ON can be made in less than 2s,

we have to delay the semi -> stby transition until

the requirement is met.

Switch Audio-Reset low and wait 5ms

unblank the video.

Wait until valid and stable audio and video, corresponding to

the requested output is delivered by the AVC.

The higher level requirement is that audio and

video should be demuted without transient

effects and that the audio should be demuted

maximum 1s before or at the same time as the

unblanking of the video.

Release audio mute and wait 100ms before any other audio

handling is done (e.g. volume change)

Request Tcon to Switch on the backlight in a

direct LED or

set Lamp-on I/O line in case of a side LED

Switch on the Ambilight functionality according the last status

settings.

There is no need to define the

display timings since the timing

implementation is part of the Tcon.

Start POK line

detection algorithm

return

Display cfg file present

and up to date, according

correct display option?

Startup screen Option

and Installation setting

Photoscreen ON?

Yes

Prepare Start screen Display config

file and copy to Flash

Yes

Backlight already on?

(splash screen)

Yes

Service Modes, Error Codes, and Fault Finding

Figure 5-7 “Semi Stand-by” to “Active” flowchart (LED backlight 200 Hz)

2011-Feb-18

back to

div. table

Service Modes, Error Codes, and Fault Finding

18770_255_100216.eps

100216

Semi Standby

Active

Wait x ms (display file)

Mute all sound outputs via softmute

Mute all video outputs

switch off LCD backlight

(I/O or I²C)

Force ext audio outputs to ground

(I/O: audio reset)

And wait 5ms

switch off Ambilight

Set main amplifier mute (I/O: audio-mute)

Wait 100ms

Wait until Ambilight has faded out: Output power

Observer should be zero

Switch off the displaypowerby

switching LCD-PWR-ON high

Wait x ms

Switch off LVDS output in 85500

The exact timings to

switch off the

display(LVDS

delay, lamp delay)

are defined in the

display file.

Switch off POK line detection algorithm

200Hz set?

Yes

Instruct 200Hz

Tcon to turn off

the display

EN 25Q552.2E LA 5.

Figure 5-8 “Active” to “Semi Stand-by” flowchart

back to

div. table

2011-Feb-18

EN 26 Q552.2E LA5.

18770_256_100216.eps

100216

transfer Wake up reasons to the Stand by µP.

Stand by

Semi Stand by

Disable all supply related protections and switch off

the DC/DC converters (ENABLE-3V3n)

Switch OFF all supplies by switching HIGH the

Standby I/O line

Switch AVC system in reset state (reset-system and

reset-AVC lines)

Switch reset-USB, Reset-Ethernet and Reset-DVBs

LOW

Important remarks:

release reset audio 10 sec after entering

standby to save power

Also here, the standby state has to be

maintained for at least 4s before starting

another state transition.

Wait 5ms

Wait 10ms

Delay transition until ramping down of ambient light is

finished. *)

If ambientlight functionality was used in semi-standby (lampadaire mode), switch off ambient light (see CHS

ambilight)

*) If this is not performed and the set is switched to standby when the switch off of the ambilights is still ongoing, the lights will switch off abruptly when the supply is cut.

Switch Memories to self-refresh (this creates a more

stable condition when switching off the power).

Service Modes, Error Codes, and Fault Finding

2011-Feb-18

Figure 5-9 “Semi Stand-by” to “Stand-by” flowchart

back to

div. table

Service Modes, Error Codes, and Fault Finding

10000_036_090121.eps

091118

UART SERVICE

CONNECTOR

UART SERVICE

CONNECTOR

TO I2C SERVICE CONNECTOR

TO TV

HDMI I

C only

Optional power

5V DC

ComPair II Developed by Philips Brugge

RC out

RC in

Optional

Switch

Power ModeLink/

Activity

ComPair II

Multi

function

RS232 /UART

EN 27Q552.2E LA 5.

5.4 Service Tools

5.4.1 ComPair

Introduction

ComPair (Computer Aided Repair) is a Service tool for Philips Consumer Electronics products. and offers the following:

1. ComPair helps to quickly get an understanding on how to

2. ComPair allows very detailed diagnostics and is therefore

3. ComPair speeds up the repair time since it can

4. ComPair features TV software up possibilities.

Specifications

ComPair consists of a Windows based fault finding program and an interface box between PC and the (defective) product. The ComPair II interface box is connected to the PC via an USB cable. For the TV chassis, the ComPair interface box and the TV communicate via a bi-directional cable via the service connector(s). The ComPair fault finding program is able to determine the problem of the defective television, by a combination of automatic diagnostics and an interactive question/answer procedure.

How to Connect

This is described in the chassis fault finding database in ComPair.

Caution: It is compulsory to connect the TV to the PC as shown in the picture above (with the ComPair interface in between), as the ComPair interface acts as a level shifter. If one connects the TV directly to the PC (via UART), ICs can be blown!

How to Order

ComPair II order codes:

• ComPair II interface: 3122 785 91020.

• Software is available via the Philips Service web portal.

• ComPair UART interface cable for Q55x.x.

Note: When you encounter problems, contact your local support desk.

repair the chassis in a short and effective way.

capable of accurately indicating problem areas. No knowledge on I

C or UART commands is necessary,

because ComPair takes care of this.

automatically communicate with the chassis (when the µP is working) and all repair information is directly available.

Figure 5-10 ComPair II interface connection

(using 3.5 mm Mini Jack connector): 3138 188 75051.

5.5 Error Codes

5.5.1 Introduction

The error code buffer contains all detected errors since the last time the buffer was erased. The buffer is written from left to right, new errors are logged at the left side, and all other errors shift one position to the right. When an error occurs, it is added to the list of errors, provided the list is not full. When an error occurs and the error buffer is full, then the new error is not added, and the error buffer stays intact (history is maintained). To prevent that an occasional error stays in the list forever, the error is removed from the list after more than 50 hrs. of operation. When multiple errors occur (errors occurred within a short time span), there is a high probability that there is some relation between them.

New in this chassis is the way errors can be displayed:

• If no errors are there, the LED should not blink at all in

CSM or SDM. No spacer must be displayed as well.

• There is a simple blinking LED procedure for board level repair (home repair) so called LAYER 1 errors

next to the existing errors which are LAYER 2 errors (see

Table 5-2

– LAYER 1 errors are one digit errors. – LAYER 2 errors are 2 digit errors.

• In protection mode. – From consumer mode: LAYER 1. – From SDM mode: LAYER 2.

• Fatal errors, if I2C bus is blocked and the set reboots, CSM and SAM are not selectable. – From consumer mode: LAYER 1. – From SDM mode: LAYER 2.

• In CSM mode. – When entering CSM: error LAYER 1 will be displayed

• In SDM mode. – When SDM is entered via Remote Control code or the

• Error display on screen. – In CSM no error codes are displayed on screen. – In SAM the complete error list is shown.

Basically there are three kinds of errors:

• Errors detected by the Stand-by software which lead to protection. These errors will always lead to protection and an automatic start of the blinking LED LAYER 1 error. (see section “5.6 The Blinking LED Procedure

• Errors detected by the Stand-by software which not lead to protection. In this case the front LED should blink the involved error. See also section “5.5 Error Codes

Error Buffer”. Note that it can take up several minutes

before the TV starts blinking the error (e.g. LAYER 1 error = 2, LAYER 2 error = 15 or 53).

• Errors detected by main software (MIPS). In this case the error will be logged into the error buffer and can be read out via ComPair, via blinking LED method LAYER 1-2 error, or in case picture is visible, via SAM.

5.5.2 How to Read the Error Buffer

Use one of the following methods:

• On screen via the SAM (only when a picture is visible). E.g.: – 00 00 00 00 00: No errors detected – 23 00 00 00 00: Error code 23 is the last and only

– 37 23 00 00 00: Error code 23 was first detected and

– Note that no protection errors can be logged in the

back to

div. table

by blinking LED. Only the latest error is shown.

hardware pins, LAYER 2 is displayed via blinking LED.

detected error.

error code 37 is the last detected error.

error buffer.

”).

, 5.5.4

2011-Feb-18

EN 28 Q552.2E LA5.

Service Modes, Error Codes, and Fault Finding

• Via the blinking LED procedure. See section 5.5.3 How to

Clear the Error Buffer.

•Via ComPair.

5.5.3 How to Clear the Error Buffer

Use one of the following methods:

• By activation of the “RESET ERROR BUFFER” command in the SAM menu.

• If the content of the error buffer has not changed for 50+ hours, it resets automatically.

5.5.4 Error Buffer

In case of non-intermittent faults, clear the error buffer before starting to repair (before clearing the buffer, write down the

Table 5-2 Error code overview

Description Layer 1 Layer 2

C3 2 13 MIPS E BL / EB SSB SSB

C2 2 14 MIPS E BL / EB SSB SSB

C4 2 18 MIPS E BL / EB SSB SSB

PNX doesn’t boot (HW cause) 2 15 Stby µP P BL PNX8550 SSB

12V 3 16 Stby µP P BL / Supply

Inverter or display supply 3 17 MIPS E EB / Supply

PNX51X0 2/9 21 MIPS E EB PNX51X0 200 Hz board

HDMI mux 2 23 MIPS E EB Sil9x87A SSB

I2C switch 2 24 MIPS E EB PCA9540 SSB

Channel dec DVB-S 2 28 MIPS E EB STV0903 SSB

Lnb controller 2 31 MIPS E EB LNBH23 SSB

Tuner 2 34 MIPS E EB DTT 71300 SSB

Main nvm 2 35 MIPS E EB STM24C64 SSB

Tuner DVB-S 2 36 MIPS E EB STV6110 SSB

T° sensor SSB/set 2 42 MIPS E EB LM 75 T° sensor

T° sensor LED driver/Tcon 7 42 MIPS E EB LM 75 T° sensor

PNX doesn’t boot (SW cause) 2 53 Stby µP P BL PNX8550 SSB

Display 5 64 MIPS E BL / EB Altera Display

Monitored by

content, as this history can give significant information). This to ensure that old error codes are no longer present. If possible, check the entire contents of the error buffer. In some situations, an error code is only the result of another error code and not the actual cause (e.g. a fault in the protection detection circuitry can also lead to a protection). There are several mechanisms of error detection:

• Via error bits in the status registers of ICs.

• Via polling on I/O pins going to the stand-by processor.

• Via sensing of analog values on the stand-by processor or the PNX8550.

• Via a “not acknowledge” of an I

Take notice that some errors need several minutes before they start blinking or before they will be logged. So in case of problems wait 2 minutes from start-up onwards, and then check if the front LED is blinking or if an error is logged.

Error/

Error Buffer/

Prot

Blinking LED Device Defective Board

C communication.

Extra Info

• Rebooting. When a TV is constantly rebooting due to internal problems, most of the time no errors will be logged or blinked. This rebooting can be recognized via a ComPair interface and Hyperterminal (for Hyperterminal settings, see section “5.8 Fault Finding and Repair Tips

, 5.8.7

Logging). It’s shown that the loggings which are generated

by the main software keep continuing. In this case diagnose has to be done via ComPair.

• Error 13 (I

C bus 3, SSB bus blocked). Current situation: when this error occurs, the TV will constantly reboot due to the blocked bus. The best way for further diagnosis here, is to use ComPair.

• Error 14 (I

C bus 2, TV set bus blocked). Current situation: when this error occurs, the TV will constantly reboot due to the blocked bus. The best way for further diagnosis here, is to use ComPair.

• Error 18 (I

C bus 4, Tuner bus blocked). In case this bus is blocked, short the “SDM” solder paths on the SSB during startup, LAYER error 2 = 18 will be blinked.

• Error 15 (PNX8550 doesn’t boot). Indicates that the main processor was not able to read his bootscript. This error will point to a hardware problem around the PNX8550 (supplies not OK, PNX 8550 completely dead, I between PNX and Stand-by Processor broken, etc...). When error 15 occurs it is also possible that I blocked (NVM). I

C1 can be indicated in the schematics as

C link

C1 bus is

follows: SCL-UP-MIPS, SDA-UP-MIPS.

Other root causes for this error can be due to hardware problems regarding the DDR’s and the bootscript reading from the PNX8550.

• Error 16 (12V). This voltage is made in the power supply and results in protection (LAYER 1 error = 3) in case of absence. When SDM is activated we see blinking LED LAYER 2 error = 16.

• Error 17 (Invertor or Display Supply). Here the status of the “Power OK” is checked by software, no protection will occur during failure of the invertor or display supply (no picture), only error logging. LED blinking of LAYER 1 error = 3 in CSM, in SDM this gives LAYER 2 error = 17.

• Error 21 (PNX51X0). When there is no I towards the PNX51X0 after start-up, LAYER 2 error = 21 will be logged and displayed via the blinking LED procedure if SDM is switched on. This device is located on the 200 Hz panel from the display.

• Error 23 (HDMI). When there is no I towards the HDMI mux after start-up, LAYER 2 error = 23 will be logged and displayed via the blinking LED procedure if SDM is switched on.

• Error 24 (I2C switch). When there is no I communication towards the I

C switch, LAYER 2 error = 24 will be logged and displayed via the blinking LED procedure when SDM is switched on. Remark: this only works for TV sets with an I

C controlled screen included.

• Error 28 (Channel dec DVB-S). When there is no I communication towards the DVB-S channel decoder,

LAYER 2 error = 28 will be logged and displayed via the blinking LED procedure if SDM is switched on.

C communication

2011-Feb-18

back to

div. table

Service Modes, Error Codes, and Fault Finding

EN 29Q552.2E LA 5.

• Error 31 (Lnb controller). When there is no I2C communication towards this device, LAYER 2 error = 31 will be logged and displayed via the blinking LED procedure if SDM is activated.

• Error 34 (Tuner). When there is no I

C communication towards the tuner during start-up, LAYER 2 error = 34 will be logged and displayed via the blinking LED procedure when SDM is switched on.

• Error 35 (main NVM). When there is no I communication towards the main NVM during start-up, LAYER 2 error = 35 will be displayed via the blinking LED procedure when SDM is switched “on”. All service modes (CSM, SAM and SDM) are accessible during this failure, observed in the Uart logging as follows: "<< ERRO >>> PFPOW_.C: First Error (id19, Layer_1= 2 Layer_= 35)".

• Error 36 (Tuner DVB-S). When there is no I communication towards the DVB-S tuner during start-up, LAYER 2 error = 36 will be logged and displayed via the blinking LED procedure when SDM is switched “on”.

• Error 42 (Temp sensor). Only applicable for TV sets equipped with temperature devices.

• Error 53. This error will indicate that the PNX8550 has read his bootscript (when this would have failed, error 15 would blink) but initialization was never completed because of hardware problems (NAND flash, ...) or software initialization problems. Possible cause could be that there is no valid software loaded (try to upgrade to the latest main software version). Note that it can take a few minutes before the TV starts blinking LAYER 1 error = 2 or in SDM, LAYER 2 error = 53.

• Error 64. Only applicable for TV sets with an I screen.

5.6 The Blinking LED Procedure

5.6.1 Introduction

The blinking LED procedure can be split up into two situations:

• Blinking LED procedure LAYER 1 error. In this case the error is automatically blinked when the TV is put in CSM. This will be only one digit error, namely the one that is referring to the defective board (see table “5-2 Error code

overview”) which causes the failure of the TV. This

approach will especially be used for home repair and call centres. The aim here is to have service diagnosis from a distance.

• Blinking LED procedure LAYER 2 error. Via this procedure, the contents of the error buffer can be made visible via the front LED. In this case the error contains 2 digits (see table “5-2 Error code overview displayed when SDM (hardware pins) is activated. This is especially useful for fault finding and gives more details regarding the failure of the defective board.

Important remark:

For an empty error buffer, the LED should not blink at all in CSM or SDM. No spacer will be displayed.

C controlled

”) and will be

4. Six short blinks followed by a pause of 3 s

5. One long blink of 3 s to finish the sequence (spacer).

6. The sequence starts again.

5.6.2 How to Activate

Use one of the following methods:

• Activate the CSM. The blinking front LED will show only the latest layer 1 error, this works in “normal operation” mode or automatically when the error/protection is monitored by the Stand-by processor. In case no picture is shown and there is no LED blinking, read the logging to detect whether “error devices” are mentioned. (see section “5.8 Fault Finding and Repair

Tips, 5.8.7 Logging”).

• Activate the SDM. The blinking front LED will show the entire content of the LAYER 2 error buffer, this works in “normal operation” mode or when SDM (via hardware pins) is activated when the tv set is in protection.

5.7 Protections

5.7.1 Software Protections

Most of the protections and errors use either the stand-by microprocessor or the MIPS controller as detection device. Since in these cases, checking of observers, polling of ADCs, and filtering of input values are all heavily software based, these protections are referred to as software protections. There are several types of software related protections, solving a variety of fault conditions:

• Related to supplies: presence of the +5V, +3V3 and 1V2 needs to be measured, no protection triggered here.

• Protections related to breakdown of the safety check mechanism. E.g. since the protection detections are done by means of software, failing of the software will have to initiate a protection mode since safety cannot be guaranteed any more.

Remark on the Supply Errors

The detection of a supply dip or supply loss during the normal playing of the set does not lead to a protection, but to a cold reboot of the set. If the supply is still missing after the reboot, the TV will go to protection.

Protections during Start-up

During TV start-up, some voltages and IC observers are actively monitored to be able to optimise the start-up speed, and to assure good operation of all components. If these monitors do not respond in a defined way, this indicates a malfunction of the system and leads to a protection. As the observers are only used during start-up, they are described in the start-up flow in detail (see section “5.3 Stepwise Start-up

5.7.2 Hardware Protections

”).

When one of the blinking LED procedures is activated, the front LED will show (blink) the contents of the error buffer. Error codes greater then 10 are shown as follows:

1. “n” long blinks (where “n” = 1 to 9) indicating decimal digit

2. A pause of 1.5 s

3. “n” short blinks (where “n”= 1 to 9)

4. A pause of approximately 3 s,

5. When all the error codes are displayed, the sequence finishes with a LED blink of 3 s (spacer).

6. The sequence starts again.

Example: Error 12 8 6 0 0. After activation of the SDM, the front LED will show:

1. One long blink of 750 ms (which is an indication of the decimal digit) followed by a pause of 1.5 s

2. Two short blinks of 250 ms followed by a pause of 3 s

3. Eight short blinks followed by a pause of 3 s

back to

div. table

The only real hardware protection in this chassis appears in case of an audio problem e.g. DC voltage on the speakers. This protection will only affect the Class D audio amplifier (item 7D10; see diagram B03A) and puts the amplifier in a continuous burst mode (cyclus approximately 2 seconds).

Repair Tip

• There still will be a picture available but no sound. While the Class D amplifier tries to start-up again, the cone of the loudspeakers will move slowly in one or the other direction until the initial failure shuts the amplifier down, this cyclus starts over and over again. The headphone amplifier will also behaves similar.

2011-Feb-18

EN 30 Q552.2E LA5.

Service Modes, Error Codes, and Fault Finding

5.8 Fault Finding and Repair Tips

Read also section “5.5 Error Codes, 5.5.4 Error Buffer, Extra

Info”.

5.8.1 Ambilight

Due to degeneration process of the LED’s fitted on the ambi module, there can be a difference in the colour and/or light output of the spare ambilight modules in comparison with the originals ones contained in the TV set. Via SAM => alignments => ambilight, the spare module can be adjusted.

5.8.2 Audio Amplifier

The Class D-IC 7D10 has a powerpad for cooling. When the IC is replaced it must be ensured that the powerpad is very well pushed to the PWB while the solder is still liquid. This is needed to insure that the cooling is guaranteed, otherwise the Class DIC could break down in short time.

5.8.3 AV PIP

To check the AV PIP board (if present) functionality, a dedicated tespattern can be invoke as follows: select the “multiview” icon in the User Interface and press the “OK” button. Apply for the main picture an extended source, e.g. HDMI input. Proceed by entering CSM (push ‘123654’ on the remote control) and press the yellow button. A coloured testpattern should appear now, generated by the AV PIP board (this can take a few seconds).

• +5V-TUN supply voltage (5V nominal) for tuner and IF amplifier.

+3V3-STANDY (3V3 nominal) is the permanent voltage, supplying the Stand-by microprocessor inside PNX855xx.

Supply voltage +1V1 is started immediately when +12V voltage becomes available (+12V is enabled by STANDBY signal when "low"). Supply voltages +3V3, +2V5, +1V8, +1V2 and +5V-TUN are switched "on" by signal ENABLE-3V3 when "low", provided that +12V (detected via 7U40 and 7U41) is present.

+12V is considered OK (=> DETECT2 signal becomes "high", +12V to +1V8, +12V to +3V3, +12V to +5V DC-DC converter can be started up) if it rises above 10V and doesn’t drop below 9V5. A small delay of a few milliseconds is introduced between the start-up of 12V to +1V8 DC-DC converter and the two other DC-DC converters via 7U48 and associated components.

Description DVB-S2:

• LNB-RF1 (0V = disabled, 14V or 18V in normal operation) LNB supply generated via the second conversion channel of 7T03 followed by 7T50 LNB supply control IC. It provides supply voltage that feeds the outdoor satellite reception equipment.

• +3V3-DVBS (3V3 nominal), +2V5-DVBS (2V5 nominal) and +1V-DVBS (1.03V nominal) power supply for the silicon tuner and channel decoder. +1V-DVBS is generated via a 5V to 1V DC-DC converter and is stabilized at the point of load (channel decoder) by means of feedback signal SENSE+1V0-DVBS. +3V3-DVBS and +2V5-DVBS are generated via linear stabilizers from +5V-DVBS that by itself is generated via the first conversion channel of 7T03.

5.8.4 CSM

When CSM is activated and there is a USB stick connected to the TV, the software will dump the complete CSM content to the USB stick. The file (Csm.txt) will be saved in the root of the USB stick. If this mechanism works it can be concluded that a large part of the operating system is already working (MIPS, USB...)

5.8.5 DC/DC Converter

Description basic board

The basic board power supply consists of 4 DC/DC converters and 5 linear stabilizers. All DC/DC converters have +12V input voltage and deliver:

• +1V1 supply voltage (1.15V nominal), for the core voltage of PNX855xx, stabilized close to the point of load; SENSE+1V1 signal provides the DC-DC converter the needed feedback to achieve this.

• +1V8 supply voltage, for the DDR2 memories and DDR2 interface of PNX855xx.

• +3V3 supply voltage (3.30V nominal), overall 3.3 V for onboard IC’s, for non-5000 series SSB diversities only.

• +5V (5.15V nominal) for USB, WIFI and Conditional Access Module and +5V5-TUN for +5V-TUN tuner stabilizer.

The linear stabilizers are providing:

• +1V2 supply voltage (1.2V nominal), stabilized close to PNX855xx device, for various other internal blocks of PNX855xx; SENSE+1V2 signal provides the needed feedback to achieve this.

• +2V5 supply voltage (2.5V nominal) for LVDS interface and various other internal blocks of PNX855xx; for 5000 series SSB diversities the stabilizer is 7UD2 while for the other diversities 7UC0 is used.

• +3V3 supply voltage (3V3 nominal) for 5000 series SSB diversities, provided by 7UD3; in this case the 12V to 3V3 DC-DC converter is not present.

At start-up, +24V becomes available when STANDBY signal is "low" (together with +12V for the basic board), when +3V3 from the basic board is present the two DC-DC converters channels inside 7T03 are activated. Initially only the 24V to 5V converter (channel 1 of 7T03 generating +5V-DVBS) will effectively work, while +V-LNB is held at a level around 11V7 via diode 6T55. After 7T05 is initialized, the second channel of 7T03 will start and generates a voltage higher then LNB-RF1 with 0V8. +5VDVBS start-up will imply +3V3-DVBS start-up, with a small delay of a few milliseconds => +2V5-DVBS and +1V-DVBS will be enabled.

If +24V drops below +15V level then the DVB-S2 supply will stop, even if +3V3 is still present.

Debugging

The best way to find a failure in the DC/DC converters is to check their start-up sequence at power “on” via the mains cord, presuming that the stand-by microprocessor and the external supply are operational. Take STANDBY signal "high"-to-"low" transition as time reference. When +12V becomes available (maximum 1 second after STANDBY signal goes "low") then +1V1 is started immediately. After ENABLE-3V3 goes "low", all the other supply voltages should rise within a few milliseconds.

Tips

• Behaviour comparison with a reference TV550 platform can be a fast way to locate failures.

• If +12V stays "low", check the integrity of fuse 1U40.

• Check the integrity (at least no short circuit between drain and source) of the power MOS-FETs before starting up the platform in SDM, otherwise many components might be damaged. Using a ohmmeter can detect short circuits between any power rail and ground or between +12V and any other power rail.

• Short circuit at the output of an integrated linear stabilizer (7UC0, 7UD2 or 7UD3) will heat up this device strongly.

• Switching frequencies should be 500 kHz ...600 kHz for 12 V to 1.1 V and 12 V to 1.8 V DC-DC converters,

2011-Feb-18

back to

div. table

+ 84 hidden pages