Philips 40PFL8664H/12, 40PFL7664H/12 Schematic

Colour Television Chassis

Q548.1E

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Contents Page Contents Page

1. Revision List 2

2. Technical Specifications and Connections 2

3. Precautions, Notes, and Abbreviation List 6

4. Mechanical Instructions 10

5. Service Modes, Error Codes, and Fault Finding 14

6. Alignments 32

7. Circuit Descriptions 38

8. IC Data Sheets 41

9. Block Diagrams Wiring Diagram 40" (Edge LIT) 49 Block Diagram Video 50 Block Diagram Audio 51 Block Diagram Control & Clock Signals 52

Block Diagram I2C 53

Supply Lines Overview 54

10. Circuit Diagrams and PWB Layouts Drawing PWB 10-LED: Microcontroller Block 10-LED: Microcontroller Block 56 59 10-LED: LED Block 57 59 10-LED: LED Drive 58 59 SSB: DC/DC +3V3 +1V2 (B01A) 60 88 SSB: DC/DC +3V3-Stdby +1V2-Stdby (B01B) 61 88 SSB: Front End (B02A) 62 88 SSB: PNX8543 - Power (B03A) 63 88 SSB: PNX8543 - Video stream/LVDS out(B03B) 64 88 SSB: PNX8543 - Audio Amplifier (B03C) 65 88 SSB: PNX8543 - Audio (B03D) 66 88 SSB: PNX8543 - Analogue AV (B03E) 67 88 SSB: PNX8543 - SDRAM (B03F) 68 88 SSB: PNX8543 - Cntrl MIPS/Flash/PCI (B03G) 69 88 SSB: PNX8543 - Stdby-Cntrl/Debug (B03H) 70 88 SSB: Bolt-on (B04A) 71 88 SSB: Analog IO - Scart 1 & 2 (B04B) 72 88 SSB: YPbPr / Side I/O / S-video (B04C) 73 88

Copyright 2009 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.

55 59

SSB: HDMI (B05A) 74 88 SSB: Ethernet (B05B) 75 88 SSB: PCMCIA (B05C) 76 88 SSB: Class-D (B06A) 77 88 SSB: Display Interface (Common) (B07A) 78 88 SSB: Display Interface (B07B) 79 88 SSB: PNX5100 - Power (B08A) 80 88 SSB: PNX5100 - SDRAM (B08B) 81 88 SSB: PNX5100 - Ctrl/PCI/Debug (B08C) 82 88 SSB: PNX5100 - LVDS In/Out (B08D) 83 88 SSB: PNX5100 - AmbiLight (B08E) 84 88 SSB: SRP List Explanation 85 SSB: SRP List Part 1 86 SSB: SRP List Part 2 87 Temperature Sensor (TS1) 89 90

Published by ER/EL 0972 BU TV Consumer Care, the Netherlands Subject to modification EN 3122 785 18672

2009-Dec-18

EN 2 Q548.1E LB1.

Revision List

1. Revision List

Manual xxxx xxx xxxx.0

• First release.

Manual xxxx xxx xxxx.1

• All Chapters: updated CTN overview, see Table 2-1

• Chapter 5: added SSB replacement flowcharts in section

5.8.12

• Chapter 6: changed option codes, see Table 6-3 and

Table 6-4

Manual xxxx xxx xxxx.2

• Chapter 2: improved readability of the connection overview; see figure 2-1

2. Technical Specifications 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).

2.1 Technical Specifications

For on-line product support please use the links in Table 2-1. Here is product information available, as well as getting started, user manuals, frequently asked questions and software & drivers.

Table 2-1 Described Model numbers

CTN Styling Published in:

40PFL7664H/12

40PFL8664H/12

Edge LIT 3122 785 18670

2.2 Directions for Use

You can download this information from the following websites:

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

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2.3 Connections

Technical Specifications and Connections

EN 3Q548.1E LB 2.

Side connectors

2 3 4

Back connectors

AUDIO

OUT

10 9

SPDIF

EXT 2

OUT

(RGB/CVBS)

VGA

EXT 1

(RGB/CVBS)

NETWORK

Note: The following connector colour abbreviations are used (according to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy= Grey, Rd= Red, Wh= White, Ye= Yellow.

2.3.1 Side Connections

1 - Cinch: Audio - In

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

2 - Cinch: Video CVBS - In

Ye - Video CVBS 1 V

/ 10 kΩ jq

RMS

/ 10 kΩ jq

RMS

/ 75 Ω jq

AUDIO IN: LEFT / RIGHT HDMI 1 / DVI HDMI 2 / DVI HDMI 3 / DVI

EXT 3

Figure 2-1 Connection overview

4 - Head phone (Output)

Bk - Head phone 32 - 600 Ω / 10 mW ot

5 - Common Interface

68p - See diagram B05C SSB: PCMCIA

6 - USB2.0

VGA

HDMI 3

HDMI 2 HDMI 1

15 16

1 2 3 4

TV ANTENNA

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3 - S-Video (Hosiden): Video Y/C - In

1 - Ground Y Gnd H 2 - Ground C Gnd H 3 - Video Y 1 V 4 - Video C 0.3 V

/ 75 Ω j

Figure 2-2 USB (type A)

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

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EN 4 Q548.1E LB2.

Technical Specifications and Connections

7 - HDMI: Digital Video, Digital Audio - In (see connector 15)

8 - Service Connector (UART)

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

2.3.2 Rear Connections

9 - EXT1/2: Video RGB - In, CVBS - In/Out, Audio - In/Out (*)

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Figure 2-3 SCART connector

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

/ 1 kΩ k

RMS

/ 10 kΩ j

RMS

/ 1 kΩ k

RMS

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

/ 10 kΩ j

RMS

/ 75 Ω jk

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.

/ 75 Ω j

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

/ 75 Ω j

1 - 3 V: EXT / 75 Ω j 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

/ 75 Ω k

/ 75 Ω j

(*) Note: The AV output on SCART 1 or 2 will be enabled (SW controlled) for analogue RF channels only, if the decoder is turned “on” in the Menu: select Setup -> Installation -> Decoder

-> Status: select SCART 1 or 2 -> Channel: select any analogue channel.

10 - Cinch: S/PDIF - Out

Bk - Coaxial 0.4 - 0.6V

/ 75 Ω kq

11 - Cinch: Audio - Out

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

/ 10 kΩ kq

RMS

/ 10 kΩ kq

RMS

12 - VGA: Video RGB - In

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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 Ω 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

13 - Mini Jack: Audio - In

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

/ 10 kΩ jo

RMS

/ 10 kΩ jo

RMS

14 - EXT3: 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

/ 75 Ω jq

/ 10 kΩ jq

RMS

/ 10 kΩ jq

RMS

15 - HDMI 1, 2 & 3: Digital Video, Digital Audio - In

18 2

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Figure 2-5 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 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

16 - Aerial - In

- - IEC-type (EU) Coax, 75 Ω D

17 - RJ45: Ethernet (if present)

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Figure 2-6 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

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Technical Specifications and Connections

2.4 Chassis Overview

Refer to chapter 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. Of de set ontploft!

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 MΩ and 12 MΩ.

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.

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 kΩ).

• Resistor values with no multiplier may be indicated with either an “E” or an “R” (e.g. 220E or 220R indicates 220 Ω).

• All capacitor values are given in micro-farads (μ=× 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

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.

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Precautions, Notes, and Abbreviation List

EN 7Q548.1E LB 3.

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 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

BJ3.0E LA

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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.

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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

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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.

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

4.2 Service Positions

4.3 Assy/Panel Removal

4.4 Set Re-assembly

4.1 Cable Dressing

Notes:

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

Figure 4-1 Cable dressing 40PFL8664H/xx

For taping see also Wiring Diagram 40" (Edge LIT)

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Mechanical Instructions

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4.2 Service Positions

For easy servicing of this set, there are a few possibilities created:

• The buffers from the packaging.

• Foam bars (created for Service).

4.2.1 Foam Bars

Required for sets

42"

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Figure 4-2 Foam bars

The foam bars (order code 3122 785 90580 for two pieces) can be used for all types and sizes of Flat TVs. See figure Figure 4-2

for details. Sets with a display of 42" and larger, require four foam bars [1]. Ensure that the foam bars are always supporting the cabinet and never only the display. Caution: Failure to follow these guidelines can seriously damage the display! By laying the TV face down on the (ESD protective) foam bars, a stable situation is created to perform measurements and alignments. By placing a mirror under the TV, you can monitor the screen.

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4.3 Assy/Panel Removal

4.3.1 Rear Cover

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.

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.

4.3.2 Ambilight

1. After removal of the rear cover, the Ambilight modules are accessible.

2. Unplug the connector(s).

3. Remove the screws that fixate the unit.

4. Take the unit out.

When defective, replace the whole unit.

4.3.3 Speakers

Each speaker unit is mounted with three screws. A sticker on the unit indicates if it is the right (“R”) or left (“L”) box (seen from the front side of the TV).

1. Unplug the connectors.

2. Remove the screws that fixate the unit.

3. Take the unit out.

When defective, replace the whole unit.

4.3.4 LED/IR

1. Unplug the connectors.

2. Remove the two fixation screws.

3. Take the unit out.

When defective, replace the whole unit.

4.3.5 Keyboard Control

1. Release the cable.

2. Unplug the connector.

3. Release the clip on top of the unit and take the unit out.

When defective, replace the whole unit.

4.3.6 Temperature Sensor

1. Unplug the connector.

2. Remove the screw.

3. Take the unit out.

When defective, replace the whole unit.

4.3.7 Power Supply

1. Unplug all connectors.

2. Remove the fixation screws.

3. Take the unit out.

When defective, replace the whole unit.

4.3.8 Small Signal Board (SSB)

Caution: It is mandatory to remount screws at their original

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

1. Unplug all connectors. Be careful with the fragile LVDS connector(s)!

2. Remove all screws that secure the board.

3. Take the board out.

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Mechanical Instructions

4.3.9 LCD Panel

See Figure 4-3

1. Remove the stand [1].

2. Unplug connectors 1M20 and 1M21 on the IR/LED [2].

3. Lift the Keyboard Control unit [3] from the frame.

4. Unplug connector 1351 (CN-S-1)on PSU-1 [4].

5. Unplug connectors 1316 & 1317 to the LED backlight [5].

6. Unplug LVDS connectors 1G50 and 1G51 on the SSB [6].

7. Unplug connector 1351 (CN-S-1-A) on PSU-2 [7].

8. Free the following cables from their saddles (or loosen tape) [8]: – all cables located just beneath PSU-1 and PSU-2. – all cables located just above PSU-1 and PSU-2.

9. Remove all screws that hold the metal subframe [9], and lift the subframe, including boards and cables, from the cabinet. See Figure 4-4

10. The LCD panel can now be lifted from the cabinet.

11. Before sending a defective LCD panel to the warehouse, remove all cables, tapes and also the aluminium cooling block. See Figure 4-5 placed on the new panel. Refer also to Wiring Diagram 40" (Edge LIT) placing instructions.

for details.

for details. These items must be re-

for tape

Figure 4-3 LCD Panel removal (1/3): Disassembly sequence.

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Figure 4-4 LCD Panel removal (2/3): Subframe with panels and cables

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Figure 4-5 LCD Panel removal (3/3): Bare LCD panel after removal subframe

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 also Figure 4-1

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

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EN 14 Q548.1E LB5.

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Step by step 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 analog SDM and a digital SDM. Tuning will happen according to Table 5-1

• Analog 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.

• 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.

• Analog SDM can also be activated by, on the SSB, shorting for a moment the solder pads SDM [1] (see

Figure 5-1

SDM1SDM

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 step by step start up). See section 5.3 Step by step 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

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

Default system

DVB-T

18440_200_090225.eps

Figure 5-1 Service mode pads

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 set will toggle between the SDM and the normal

user menu (with the SDM mode still active in the background).

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.

091118

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

• All sound settings at 50%, except volume at 25%.

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Service Modes, Error Codes, and Fault Finding

EN 15Q548.1E LB 5.

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 “I+” button. After activating SAM with this method a service warning will appear on the screen, continue by pressing the red button on the RC.

Contents of SAM (see also Table 6-5

• Hardware Information – A. SW version. Displays the software version of the

main software (example: Q5481-0.26.2.0= AAAaB_X.Y.W.Z).

• AAAA= the chassis name, where “a” indicates the chip version: e.g. TV543/32= Q543, TV543/82= Q548, Q543/92= Q549.

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

• Errors (followed by maximum 10 errors). The most recent error is displayed at the upper left (for an error explanation see section 5.5 Error Codes

• Reset Error Buffer. When “cursor right” (or the “OK” button) is pressed and then the “OK” button is pressed, the error buffer is reset.

• Alignments. This will activate the “ALIGNMENTS” submenu. See chapter 6. Alignments.

• Dealer Options. Extra features for the dealers. See Table

6-5.

• Options. Extra features for Service. For more information 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.

• Initialize NVM. The moment the processor recognizes a 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.

• 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 for details. To adapt this option, it’s advised to use ComPair (the correct HEX values

for the options can be found in chapter 8 “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 in Table 6-3

. 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.

Display Option

Code

39mm

040

PHILIPS

MODEL:

32PF9968/10

27mm

PROD.SERIAL NO:

AG 1A0620 000001

(CTN Sticker)

10000_038_090121.eps

090819

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.

• SW Maintenance.

– SW Events. Not useful for Service purposes. In case

of specific software problems, the development department can ask for this information.

– HW Events. Not useful for Service purposes. In case

of specific software problems, the development department can ask for this information.

• Operation hours display. Displays the accumulated total

of display operation hours. So, this one keeps up the lifetime of the display itself, mainly to compensate the degeneration behaviour.

• 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”, “Display-related alignments” and “History list”. 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 “Done” appears. In case the download to the USB stick was not successful “Failure” will appear. 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 onto another TV or other SSB. Uploading is of course only possible if the software is running and if 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 as with uploading. 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.

Note: The “History list item” can not be downloaded from USB to the TV. This is a “read-only” item. In case of specific problems, the development department can ask for this information.

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Service Modes, Error Codes, and Fault Finding

How to Navigate

• In SAM, the menu items can be selected with the “CURSOR UP/DOWN” key (or the scroll wheel) on the RCtransmitter. The selected item will be highlighted. When not all menu items fit on the screen, move the “CURSOR UP/ DOWN” key to display the next/previous menu items.

• With the “CURSOR LEFT/RIGHT” keys (or the scroll wheel), 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 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 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

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. This information can be handy if no information is displayed.

When in this chassis CSM is activated, a test pattern will be displayed during 5 s.: 1 s. blue, 1 s. green, and 1 s. red, then again 1 s. blue and 1 s. green. This test pattern is generated by the PNX5120. So if this test pattern is shown, it could be determined that the back end video chain (PNX5120, LVDS, and display) of the SSB is working.

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 (or the scroll wheel) on the RC-transmitter, can be navigated through the menus.

Contents of CSM

The contents are displayed on three pages: General, Software versions, and Quality items. However, these 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.

• 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 a in possibility to do this.

• 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. Remark: the content here can also be a part of the 12NC of the SSB in combination with the serial number.

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

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

• 12NC “fan board”. Shows the 12NC of the “fan board”module.

• 12NC “LED Dimming Panel”. Shows the 12NC of the LED dimming Panel.

Software versions

• Current main SW. Displays the built-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: Q5481E_1.2.3.4.

• Standby SW. Displays the built-in stand-by processor software version. Upgrading this software will be possible via ComPair or via USB (see section Software Upgrading Example: STDBY_1.2.3.4.

• Ambilight SW. Displays the MOP ambient light SW.

• LED dimming SW. Displays the LED dimming EPLD SW (for sets with LED backlight).

• Local contrast SW. Displays the MOP local contrast SW version.

Quality items

• Signal quality. Poor/average/good

• Child lock. Not active/active. This is a combined item for locks. If any lock (Preset lock, child lock, lock after or parental lock) is active, the item shall show “active”.

• HDMI HDCP key. Indicates of the HDMI keys (or HDCP keys) are valid or not. In case these keys are not valid and the consumer wants to make use of the HDMI functionality, the SSB has to be replaced.

• 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 “BDS level 1” key is valid or not.

• CI slot present. If the common interface module is detected the result will be “YES”, else “NO”.

• HDMI input format. The detected input format of the HDMI.

• HDMI audio input stream. The HDMI audio input stream is displayed: present / not present.

• HDMI video input stream. The HDMI video input stream is displayed: present / not present.

How to Exit CSM

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

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5.3 Step by step 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 short cutting the pins on the SSB, the TV starts up until it reaches the situation just before protection. So, this is a kind of automatic step by step start-up. In combination with the start-up diagrams below, it is shown which supplies are present at a certain moment. Important to know is, that if e.g. the 3V3 detection fails and thus layer 2 error = 18 is blinking while the TV is restarted via SDM, the Stand-by Processor will enable the 3V3, but the TV set will not go to protection now. The TV will stay in this situation until it is reset (Mains/AC Power supply interrupted). Caution: in case the start-up in this mode with a faulty FET 7101-1 is done, all ICs supplied by the +3V3 could be destroyed, due to over voltage (12V on 3V3-line). It is recommended to measure first the FET 7101-1 or others FETs on short-circuit 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.

St by

Hibernate

Mains

off

- WakeUp requested

- Acquisition needed

- Tact switch pushed

- stby requested and no data Acquisition required

Tact switch

pushed

- Tact switch pushed

- last status is hibernate after mains ON

Mains

Semi St by

GoToProtection

WakeUp

requested

-St by requested

- tact SW pushed

WakeUp

requested

(SDM)

Protection

Active

GoToProtection

Figure 5-3 Transition diagram

18440_215_090227.eps

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Detect2 should be polled on the standard 40ms interval and startup should becontinuedwhen detect2 becomes high.

This enables the +3V3and+5V converter. Asa result, also+5V-tuner, +2V5, +1V8-PNX8541 and +1V8-PNX5100 (if present) become available.

Delayof50ms needed becauseofthelatency of the detect-1 circuit. This delayisalsoneededfor the PNX5100. The reset of the PNX5100 should only be released 10msafter powering the IC.

Service Modes, Error Codes, and Fault Finding

Off

Mains isapplied

Standby Supply starts running.

All standby supply voltagesbecome available.

st-byµPresets

InitialiseI/Opins of the st-byµP:

- Switch reset-AVC LOW (reset state)

- Switch WP-NandFlash LOW (protected)

- Switch reset-system LOW (reset state)

- Switch reset-5100 LOW (reset state)

- Switch reset-Ethernet LOW (reset state)

-keepreset-NVM high, Audio-reset and Audio-Mute-Up HIGH

start keyboard scanning, RC detection. Wake upreasonsare

Switch ON Platform and display supply by switching

isswitched on, followed by the +1V2 DCDC converter

Delay1.5secondbefore checking detect2 line

off.

Reset detect2_delay_flag

LOW the Standby line.

+12V, +24Vs,ALand Bolt-on power

if the detect2_delay_flagisset

Detect2 high received

within 2 seconds?

Yes

Wait fixed time of 15ms

Detect2 high?

Yes

Reset detect2_delay_flag

Enable the DCDC converter for +3V3and

+5V. (ENABLE-3V3)

Wait 50ms

Enter protection

Stand byor

Protec tio n

If the protection state was left by short circuiting 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.

- Switch Audio-Reset high.

It is low in the standbymodeifthestandby

mode lasted longer than10s.

Carefull we don’t hit this error

directly if the delayflagisset.

Power-OK error:

Layer1: 3

Layer2: 16

If the supply is hicking, the firstdetect2could

bepositive(12V still present), followed by

negative Supply-fault (already low). Adding a

fixed delay bringsusbehindthis delaygap.

Confirmation received from NXP that there does not need to be a delay between the rise of the +1V2 and the +3V3.Only requirement is to have the +1V2 before or atthesame time

as the +3V3.150ms delayisdeleted.

Set detect2_delay_flag

Detect-1 I/O line

High?

Yes

Enable the supply detection algorithm

Set I²C slave address

of StandbyµPto(A0h)

Switch LOW the RESET-NVM line to allow access to NVM. (Add a 2ms delay before trying to address the NVM to allow correct NVM

initialization, this is no issueinthissetup,the delayisautomatically

covered bythearchitecturalsetup)

Switch HIGH the WP-NandFlashto

allow access to NAND Flash

ReleaseReset-PNX5100.

PNX5100 will start booting.

Wait 10 ms

Detect EJTAG debugprobe

(pulling pin of the probeinterfaceto

ground byinsertingEJTAG probe)

EJTAG probe

connected ?

Cold boot?

Yes

Release AVC system reset

Feed cold boot script

ReleaseAVCsystemreset

Feed warm boot script

Detect-2 I/O line

High?

Yes

Wait 50ms

Detect-1 I/O line

High?

Detect-2 I/O line

High?

Yes

Voltage outputerror:

Layer1: 2

Layer2: 18

Yes

ReleaseAVCsystemreset Feed initializing boot script

disable alive mechanism

Only usefull in case of PNX5100 present. To avoid diversity in standbyµP,thereset-PNX5100will still be switched bythestandbyµP.

This 10ms delayisstill present to give some relaxation to the supplies. (The PCI arbiter on the PNX5100 is never used and is not the reason anymore)

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

Disable 3V3, switch standby line high and wait 4 seconds

Thesechecks prevent the set from going in to standbyonthefalse error condition where the

Becauseofthis reappearance, the 12V check

is OK which would cause protection. If we wait

Enter protection

This will allow access to NVM and NAND FLASH and cannotbedone earlier becausetheFLASH needs to

be in Write Protect as long as the suppliesare not available.

first 3V3 is negative becauseofahickup, although the 12V was abouttoreappear.

50ms,the3V3should be back as well.

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

18440_216a_090227.eps

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Service Modes, Error Codes, and Fault Finding

EN 19Q548.1E LB 5.

From : 18440_216a_090227.eps

3-th try?

Yes

Blink Code as

error code

Enter pro tection

Reset-system is connected to the Micronas MultiStandard decoder.

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

Timing need to be updated if more mature info isavailable.

Code =

Layer1: 2

Layer2: 15

Switch AVC PNX8543

in reset (active low)

Wait 10ms

Switch the NVM reset

line HIGH.

Disable all supply related protectionsand

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

Wait 5ms

switch off the remaining DC/DC

converters

Switch Standby I/O line high

and wait 4 seconds

Code =

Layer1: 2

Layer2: 53

From : 18440_216a_090227.eps

Reset-system isswitched HIGH bythe

AVC at the end of the bootscript

AVC releases Reset-Ethernet when the

end of the AVC boot-script is detected

Reset-Audio and Audio-Mute-Up are

switched byMIPS code later on in the

startupprocess

Bootscript ready

in 1250 ms?

Yes

Set I²C slave address

of Standby µP to (60h)

RPC start (comm. protocol)

FlashtoRam

image transfer succeeded

within 30s?

Yes

SW initialization

succeeded within 20s?

Yes

Enable Alive check mechanism

MIPS reads the wake upreason

from standbyµP.

5100 SW start

Wake upreason

coldboot & not semi-

standby?

yes

Startup screen cfg file

present?

yes

MIPSsends displayparametersand

Bitmapto5100

MIPS triggers 5100 to displaythe

startup screen

Startup screen visible

Reset-system isswitched HIGH bythe

AVC attheendofthebootscript

AVC releases Reset-Ethernet when the

end of the AVC boot-script is detected

Reset-Audio and Audio-Mute-Up are

switched by MIPS code later on in the

startupprocess

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

Wait until AVC starts to

communicate

Startup screen shall only bevisible when there isacoldboot to an active state end situation. The startup screen shall not

bevisible when waking upforreboot reasons or waking upto semi-standby conditions.

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.

To keep this flowchart readable, the exact displayturn on description is not copied here. Please see the Semi-standby to On description for the detailed display startup sequence. During the complete displaytimeoftheStartup screen, the preheat condition of 100% PWM is valid.

Initialize audio

Switch on the displayincaseofa LED backlight

display by sending the TurnOnDisplay(1) (I²C)

command to the PNX5100

Enable the PWM outputtowards the displayLVDS

cable in caseofa LED Backlight set.

(CTRL4-PNX5100)

Init ialize tuner and Multi Standard decoder

Initialize source selection

Initialize video processing IC's

-local contrast FPGA

- PNX5100 (if present)

Init ialize AutoTV

Initialize Ambilight with Lights off.

In caseofa LED backlight display, a LED DIM panel is present which is fed by the Vdisplay. To power the LED DIM Panel, the Vdisplay switch driven by the PNX5100 must beclosed. The display startup sequence is taken care of bytheLEDDIM panel. Secondly, this cmd will alsoenable the LVDS outputof the 5100 towards the LED DIM panel.

In caseofa LED backlight display, the PWM-dimming signal needs to beroutedtotheLVDS cable. This routing is not

allowed in non-LED sets (see alsodisplayconfiguration)

Semi-Standby

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

18440_216b_090227.eps

090702

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Service Modes, Error Codes, and Fault Finding

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 backlight, the backlight should be driven with a PWM duty cycle of 100% 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 before the backlight is switched on). To minimize the artefacts, the picture should only be unblanked after these first seconds.

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

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

startup can start immediately when leaving

Switch on the display power by

The exact timings to

switch on the

display (LVDS delay, lamp delay) are defined in the

display file.

The sum of the LVDS delay and the Lamp delay needs

to be used because the Lamp delay is specified with

the appearance of the LVDS on the display as

reference. This moment is not known by ceplf, only the

switch on of the LCD power is known. The delta

The complete algorithm description is

removed here.

Only the start of the algorithm

is mentioned here as reminder.

switching LCD-PWR-ON low

Wait x ms

Switch on LVDS output in 8543

between both is the LVDS delay.

be maintained for at least 4s.

the semi-standby state.

Start POK line detection

algorithm

return

Semi Standby

Wait until previous on-state is left more than 2

seconds ago. (to prevent LCD display problems)

Assert RGB video blanking

and audio mute

Display already on?

(splash screen)

PNX5100 present?

Yes

Switch on the display by sending the

TurnOnDisplay(1) (I²C) cmd to the PNX5100

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

the Lamp delay indicated in the display file

Switch off the dimming backlight feature, set

the BOOST control to nominal and make sure

PWM output is set to 100%

Switch on LCD backlight (Lamp-ON)

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

requested output is delivered by the AVC

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

indicated in the display file as preheat time.

AND

Yes

Initialize audio and video

processing IC's and functions

according needed use case.

Switch Audio-Reset low and wait 5ms

Release audio mute and wait 100ms before any other audio

handling is done (e.g. volume change)

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.

The higher level requirement is that the

ambilight functionality may not be switched on

before the backlight is turned on in case the

set contains a CE IPB inverter supply.

Restore dimming backlight feature, PWM and BOOST output

Switch on the Ambilight functionality according the last status

Yes

and unblank the video.

settings.

Startup screen Option and Installation setting

Photoscreen ON?

Display cfg file present

and up to date, according

correct display option?

Prepare Start screen Display config

file and copy to Flash

Active

Figure 5-6 “Semi Stand-by” to “Active” flowchart

Yes

18440_217_090227.eps

091112

2009-Dec-18

Service Modes, Error Codes, and Fault Finding

Active

Mute all sound outputs via softmute

Wait 100ms

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

EN 21Q548.1E LB 5.

Switch off LVDS output in 8543

Wait x ms

Force ext audio outputs to ground

(I/O: audio reset)

Switch off Ambilight

Wait until Ambilight has faded out: Output power

Observer on PNX5100 should be zero

Switch off POK line detection

Switch off LCD backlight

Mute all video outputs

Wait x ms (display file)

PNX5100 present?

Switch off the display by sending:

- TurnOnDisplay(0) (I²C) command to the PNX5100

- or sending OUTPUT-ENABLE(0) to the LED DIM panel in case of a LED BL set.

and wait 5ms

algorithm

Yes

The higher level requirement is that the

backlight may not be switched off before the

ambilight functionality is turned off in case the

set contains a CE IPB inverter supply.

The exact timings to

switch off the

display (LVDS

delay, lamp delay)

are defined in the

display file.

Switch off the display power by

switching LCD-PWR-ON high

Semi Standby

Figure 5-7 “Active” to “Semi Stand-by” flowchart

18440_219_090227.eps

091112

2009-Dec-18

EN 22 Q548.1E LB5.

Service Modes, Error Codes, and Fault Finding

Semi Stand by

If ambientlight functionality was used in semi-standby

(lampadaire mode), switch off ambient light

Delay transition until ramping down of ambient light is

finished. *)

Transfer Wake up reasons to the Stand by µP.

Switch Memories to self-refresh (this creates a more

stable condition when switching off the power).

Switch AVC system in reset state (reset-system and

reset-AVC lines) Switch reset-PNX5100 LOW Switch Reset-Ethernet LOW

Wait 10ms

Switch the NVM reset line HIGH

Switch WP-Nandflash LOW

Disable all supply related protections and switch off

the DC/DC converters (ENABLE-3V3)

Wait 5ms

*) 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.

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.

2009-Dec-18

Switch OFF all supplies by switching HIGH the

Standby I/O line

Stand by

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

18440_220_090227.eps

091112

Service Modes, Error Codes, and Fault Finding

EN 23Q548.1E LB 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 repair the chassis in a short and effective way.

2. ComPair allows very detailed diagnostics and is therefore capable of accurately indicating problem areas. No knowledge on I because ComPair takes care of this.

3. ComPair speeds up the repair time since it can automatically communicate with the chassis (when the uP is working) and all repair information is directly available.

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.

ComPair II

Figure 5-9 ComPair II interface connection

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 will 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 serial interface cable for Q54x.x. (using 3.5 mm Mini Jack connectors): 3138 188 75051.

Note: When having problems, please contact your local support desk.

RC in

C or UART commands is necessary,

TO TV

UART SERVICE

I2C SERVICE

CONNECTOR

Multi

function

ComPair II Developed by Philips Brugge

Optional power

5V DC

CONNECTOR

RS232 /UART

10000_036_090121.eps

Optional

Switch

Power ModeLink/

Activity

HDMI

C only

UART SERVICE

CONNECTOR

RC out

091118

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:

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 5-3

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

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

• Fatal errors, if I and SAM are not selectable. – From consumer mode: LAYER 1. – From SDM mode: LAYER 2.

Important remark: For all errors detected by MIPS which are fatal => rebooting of the TV set (reboot starts after LAYER 1 error blinking), one should short the solder paths at start-up from the power OFF state by mains interruption and not via the power button to trigger the SDM via the hardware pins.

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

by blinking LED. Only the latest error is shown.

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

hardware pins, LAYER 2 is displayed via blinking LED.

• In the ON state – In “Display error mode”, set with the RC commands

“mute_06250X _OK” LAYER 2 errors are displayed via blinking LED.

• 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 Extra Information 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.

C bus is blocked and the set re-boots, CSM

. Note

2009-Dec-18

EN 24 Q548.1E LB5.

Service Modes, Error Codes, and Fault Finding

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

detected error.

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

error code 37 is the last detected error.

– Note that no protection errors can be logged in the

error buffer.

• 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.

• With a normal RC, key in sequence “MUTE” followed by “062599” and “OK”.

• 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

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 analogue values on the stand-by processor or the PNX8543.

• Via a “not acknowledge” of an I

C communication.

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.

Table 5-2 Layer 1 code overview (multi chassis overview)

LAYER 1 codes

SSB 2

Display supply 3

Platform supply 4 Only for display option 196 and 197

Fan 7

AmbiLight or DC/DC or 3D LED dim panel 8

Table 5-3 Error code overview (multi chassis overview)

Description

Main NVM 2 0 MIPS I Temp. protection 3 12 MIPS I

LAYER 1 error

LAYER 2 error

Monitored

Medium

Error/Prot.

EB: in Error Buffer

BL: Blinking LED

C1 E x STM24C128 SSB TV shut down with red LED blinking 2.

Device

Defective board

C4 P BL/EB Supply I2C3213MIPSI2C3 E BL/EB SSB SSB I2C2214MIPSI2C2 E BL/EB SSB SSB

PNX does not boot (HW cause) PNX 5100 does not boot

12V 3 16 St-by µP I/O P BL Supply

12V 3 16 St-by µP I/O P BL Platform Supply

Inverter or display supply 3 17 Mips I/O E EB Supply

Only for display option 196 and 197 4 17 Mips I/O E EB Display Supply

1V2, 1V2, 3V3, 5V to low 2 18 St-by µP I/O P BL SSB PNX 5100 2 21 MIPS I

HDMI MUX 2 23 MIPS I

215St-by µP I

C1 P BL SSB SSB

C3 E EB PNX 5100 SSB

C3 E EB TDA9996 SSB I2C switch 2 24 Mips I2C2 E EB PCA9540 SSB

Boot-NVM PNX5120 2 25 MIPS

Multi Standard demodulator (Micronas IF) 2 27 MIPS I

ARM (AL) 8 28 MIPS

FPGA (Local contrast) 2 29 MIPS Tuner1 2 34 MIPS I

FAN I

C expander 7 41 MIPS I2C2 E EB PCA 9533 FAN mod.

T× sensor 7 42 MIPS I

FAN 1 7 43 MIPS

FAN 2 7 44 MIPS MIPS does not boot (SW cause) 2 53 St-by µP I

Display 5 64 MIPS

FPGA LED dim 2D 2 65 MIPS FPGA LED dim 3D 8 65 MIPS I

I2C3 E EB STM24C08 SSB

C3 E EB DRX3616K

DRX3626K

SSB

I2C3 E EB NXP LPC2103 AL mod. or DC/DC I2C3 E EB Altera SSB

C3 E EB UV1783S

C2 E EB LM 75 T×sensor

HD1816

SSB

I2C2EEB FAN I2C2EEB FAN

C1 P BL PNX8543 SSB TV is rebooting endlessly with white LED blinking.

I2C2 E BL/EB Altera Display I2C3 E EB Xilinx SSB

C2 E EB Altera SSB

Special Remarks

TV is rebooting endlessly with red LED blinking “2”.

TV is rebooting endlessly with red LED blinking “2”

TV shut down with red LED blinking “3”.

TV still in normal operation mode, but without backlights. Enter CSM Layer 1 red LED blinking “3”.

TV shut down with red LED blinking “2”.

TV is rebooting endlessly, with red LED blinking “2” (shown every 20 second).

Activate CSM red LED blinking “2”.

TV is rebooting endlessly, with red LED blinking “2” (shown every minute).

TV is in normal operation but without video displayed (RF).

TV is in normal operation but without AMBILIGHT “on”.

TV is in normal operation but without video displayed (RF).

2009-Dec-18

Service Modes, Error Codes, and Fault Finding

EN 25Q548.1E LB 5.

Extra Information

• 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 5.8.6 UART 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.

• Main NVM. When there is no I

C communication towards the main NVM, LAYER 1 error = “2” will be displayed via the blinking LED procedure. In SDM, LAYER 2 error can be “19”. Check the logging for keywords like “I

• Error 13 (I

C bus 3 blocked). When this error occurs, the

C bus blocked”.

TV will constantly reboot due to the blocked bus. The best way for further diagnosis here, is to use ComPair.

• Error 15 (PNX8543 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 PNX8543 (supplies not OK, PNX 8541 completely dead, I between PNX and Stand-by Processor broken, etc...). When error 15 occurs it is also possible that I blocked (NVM). I

C2 can be indicated in the schematics as

C link

C2 bus is

follows: SCL-UP-MIPS, SDA-UP-MIPS, SCL-2 or SDA-2. Other root causes for this error can be due to hardware problems with: NVM PNX5120, PNX5120 itself, or DDRs.

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

• Error 17 (POK). The display is switched “on” with the signal “Lamp On”. If the inverter starts (or 24V display is OK) the POK line becomes “high”. If the POK line is not “high”, the set backlight will be switched “off” and “on” again for 3 times (start-up). If the set POK line becomes “high” after the retries, no error is logged; if the POK stays “low”, error is logged: LAYER 1 error = “3”, LAYER 2 error = “17”. No protection is required, the start-up goes on.

• Error 18 (1V2-3V3-5V too low). All these supplies are generated by the DC/DC supply on the SSB. If one of these supplies is too low, protection occurs and blinking LED LAYER 1 error = “2” will be displayed automatically. In SDM this gives LAYER 2 error = “18”.

• Error 21 (PNX5120). When there is no I

C communication towards the PNX5120 after start-up (power “off” by disconnection of the mains cord), LAYER 2 error will blink continuously via the blinking LED procedure in SDM. (startup the TV with the solder paths short to activate SDM).

• Error 23 (HDMI). When there is no I

C communication towards the HDMI multiplexer after start up, LAYER 2 error = “23” will be logged and displayed via the blinking LED procedure if SDM is switched “on”.

• Error 25 (Boot-NVM PNX5120). When there is no I

C communication towards the PNX5120 NVM after start-up, TV is rebooting endlessly with blinking LAYER 1 error = 2 (shown every minute). When SDM is activated we see blinking LED LAYER 2 error = “25”.

• Error 27 (Multi Standard demodulator). When there is no

C communication towards the Multi Standard demodulator after start up, LAYER 2 error = “27” will be logged and displayed via the blinking LED procedure when SDM is switched “on”.

• Error 28 (FPGA ambilight). When there is no I

C communication towards the FPGA ambilight after start up, LAYER 2 error = “28” will be logged and displayed via the blinking LED procedure if SDM is switched “on”. Note that it can take up several minutes before the TV starts blinking LAYER 1 error = “2” in CSM or in SDM, LAYER 2 error = “28”.

• Error 29 (FPGA local contrast). Incorrect or false error logging, LAYER 2 = “29” can be displayed in the error buffer due to a software bug in the first SW release patches. To solve this problem, upgrade the main software with the latest release version.

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

C communication

towards the tuner after start up, LAYER 2 error = “34” will

be logged and displayed via the blinking LED procedure when SDM is switched on.

• Error 53. This error will indicate that the PNX8543 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 up to 2 minutes before the TV starts blinking LAYER 1 error = “2” or in SDM, LAYER 2 error = “53”.

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 5-3 Error code overview (multi chassis 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 5-3 Error code overview (multi chassis overview) be 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 all errors detected by MIPS which are fatal (rebooting of the TV set, with reboot starts after LAYER 1 error blinking), one should short the SDM solder paths at startup from the power OFF state by mains interruption and not via the power button, to trigger the SDM via the hardware pins.

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

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

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

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

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. At the time of this release, this layer 1 error blinking was not working as expected.

and will

2009-Dec-18

EN 26 Q548.1E LB5.

Service Modes, Error Codes, and Fault Finding

In case no picture is shown and there is no LED blinking, read the logging to detect whether “error devices” are mentioned. (see section 5.8.6 UART Logging

• Activate the SDM. The blinking front LED will show the entire contents 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.

Important remark:

For all errors detected by MIPS which are fatal => rebooting of the TV set (reboot starts after LAYER 1 error blinking), one should short the solder paths at start-up from the power OFF state by mains interruption and not via the power button to trigger the SDM via the hardware pins.

• Transmit the commands “MUTE” - “062500” - “OK” with a normal RC. The complete error buffer is shown. Take notice that it takes some seconds before the blinking LED starts.

• Transmit the commands “MUTE” - “06250x” - “OK” with a normal RC (where “x” is a number between 1 and 5). When x = 1 the last detected error is shown, x = 2

the second last error, etc.... Take notice that it takes some

seconds before the blinking LED starts.

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:

• Protections related to supplies: check of the 12V, +5V, +3V3 and 1V2.

• 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 Step by step Startup).

5.7.2 Hardware Protections

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 (7L10) and puts the amplifier in a continuous burst mode (cyclus approximately 2 seconds).

Repair Tips

• There will be still 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.

5.7.3 Important remark regarding the blinking LED indication

As for the blinking LED indication, the blinking LED of layer 1 error displaying can be switched “off” by pushing the power button on the keyboard. This condition is not valid after the set was unpowered (via mains interruption). The blinking LED starts again and can only be switched “off” by unplugging the mains connection. This can be explained by the fact that the MIPS can not load the keyboard functionality from software during the start-up and does not recognise the keyboard commands at this time.

5.8 Fault Finding and Repair Tips

Read also section “5.5 Error Codes, 5.5.4 Error Buffer, Extra Information”.

5.8.1 Ambilight

Due to degeneration process of the AmbiLights, there can be a difference in the colour and/or light output of the spare ambilight module in comparison with the originals ones contained in the TV set. Via ComPair, the light output can be adjusted.

5.8.2 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...)

5.8.3 Exit “Factory Mode”

When an “F” is displayed in the screen’s right corner, this means the set is in “Factory” mode, and it normally happens after a new SSB is mounted. To exit this mode, push the “VOLUME minus” button on the TV’s local keyboard for 10 seconds (this disables the continuous mode). Then push the “SOURCE” button on the TV’s local keyboard for 10 seconds until the “F” disappears from the screen.

5.8.4 DC/DC Converter

Introduction

• The best way to find a failure in the DC-DC converters is to check their starting-up sequence at “power-on via the mains cord”, presuming that the stand-by microprocessor is operational.

• If the input voltage of DC-DC converters is around 12.7 V (measured on decoupling capacitors 2107 and 2123 and the enable signals are “low” (active), then the output voltages should have their normal values. The +12V and +5VPOD supplies start-up first (enabled by PODMODE signal from the stand-by microprocessor). There is a supplementary condition for 12V to start-up: if the +5VPOD does not start up due to a local defect, then +12V will not be available as well. The +5V-ON supply is enabled by the ONMODE signal (coming also from the stand-by microprocessor). The +1V2 supply starts up when the +12V appears, then at least 100 ms later, the +3V3 will be activated via the ENABLE-3V3 signal from the stand-by microprocessor. If the +12V value is less than 10 V, the last enumerated voltages will not show up due to the undervoltage detection circuit 7105-1 + 6101 and surrounding components. Furthermore, if the +12V is less than 8 V, then also the +1V2 will not be available. The +5V5-TUN generator 7202 (present only for the analogue version of China platforms) will start to operate as soon as the 12V (PSU) is present.

2009-Dec-18

Service Modes, Error Codes, and Fault Finding

EN 27Q548.1E LB 5.

• The consumption of controller IC 7103 is around 19 mA (that means almost 200 mV drop voltage across resistor

3108).

• The current capability of DC-DC converters is quite high (short-circuit current is 7 to 10 A).

• The DETECT1 signal (active “low”) is an internal protection (error 18) of the DC-DC convertor and will occur if the output voltage of any DC-DC convertor is out of limits (10% of the normal value).

Fault Finding

• Symptom: +1V2 not present (even for a short while ~10 ms) – Check 12 V availability (resistor 3108, MOS-FETs

7101 and 7102), value of +12 V, and surrounding

components) – Check the voltage on pin 9 (1.5 V), – Check for +1V2 output voltage short-circuit to GND that

can generate pulsed over-currents 7...10 A through coil

5103.

– Check the over-current detection circuit (2106 or 3131

interrupted).

• Symptom: +1V2 present for about 100ms, +3V3 not rising. – Check the ENABLE-3V3 signal (active “low”), – Check the voltage on pin 8 (1.5 V), – Check the under-voltage detection circuit (the voltage

on collector of transistor 7105-1 should be less than

0.8 V),

– Check for output voltages short-circuits to GND (+3V3)

that can generate pulsed over currents 7...10 A through coil 5101,

– Check the over-current detection circuit (2105 or 3127

interrupted).

• Symptom: +1V2 OK, +3V3 present for about 100 ms. Possible cause: SUPPLY-FAULT line stays “low” even though the +3V3 and +1V2 is available - the stand-by microprocessor is detecting that and switching “off” all supply voltages. – Check the drop voltage across resistor 3108 (they

could be too high, meaning a defective controller IC or MOS-FETs),

– Check if the boost voltage on pin 4 of controller IC 7103

is less than 14 V (should be 19 V),

– Check if +1V2 or +3V3 are higher than their normal

values - that can be due to defective DC feedback of the respective DC-DC convertor (ex. 3152, 3144).

• Symptom: +1V2 and +3V3 show a high level of ripple voltage (audible noise can come from the filtering coils 5101, 5103). Possible cause: instability of the frequency and/or duty cycle of a DC-DC converter or stabiliser. – Check the resistor 3164, capacitors 2102 and 2103,

input and output decoupling capacitors.

– Check AC feedback circuits (2120, 2129, 3141, 3153,

2110, 2114 and 3135).

• Symptom: +1V2, +3V3 ok, no +5V5-TUN (analogue sets only). Possible cause: the “+5V5-TUN GENERATOR” circuit (7202 and surroundings components) is defective: check transistor 7202 (it has to have gate voltage pulses of about 10 V amplitude and drain voltage pulses of about 35 V amplitude) and surrounding components. A high consumption (more than 6 mA) from +5V5-TUN voltage can cause also +5V5-TUN voltage to be too low or zero.

Note: when a pair of power MOSFETs (7101 or 7102) becomes defective, the controller IC 7103 should be replaced as well.

5.8.5 Fan self test (only for sets with LED backlight)

In case fans are present, a softest can be done by pushing the red coloured button on the remote control while the TV set is in CSM. Exit CSM and check the status of the fans in the error buffer by entering SAM (062596 + info button on the RC). In case of failure (fully red screen) more detailed information is available in the error buffer (error 41, 42, 43, 44).

5.8.6 UART Logging

When something is wrong with the TV set (f.i.the set is rebooting) checking the UART logging using hyperterminal can be done to find more information. Hyperterminal is a standard Windows application. It can be found via Programs, Accessories, Communications, Hyperterminal. Connect a “ComPair UART”-cable (3138 188 75051) from the Service connector in the TV set, via the ComPair interface (this is compulsory, otherwise ICs are blown in the PC), to the “COMx”-port of the PC. After start-up of Hyperterminal, fill in a name (f.i. “logging”) in the “Connection Description” box, then apply the following settings:

1. COMx

2. Bits per second = 115200

3. Data bits = 8

4. Parity = none

5. Stop bits = 1

6. Flow control = none During the start-up of the TV set, the logging will be displayed. This is also the case during rebooting of the TV set (the same logging appears time after time). Also available in the logging is the “Display Option Code” (useful when there is no picture), look for item “DisplayRawNumber” in the beginning of the logging. Tip: When there is no picture available during reboot, it is possible to check for “error devices” in the logging (LAYER 2 error). This can be very helpful to determine the failure cause of the reboot. For protection state, there is no logging.

5.8.7 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! Sometimes the set can go into protection, but that is not always the case.

5.8.8 Tuner

Attention: In case the tuner is replaced, always check the tuner options!

5.8.9 Display option code

Attention: In case the SSB is replaced, always check the display option code in SAM, even when picture is available. Performance with the incorrect display option code can lead to unwanted side-effects for certain conditions. See also Table 6-3

5.8.10 Upgrade HDMI EDID NVM

To upgrade the HDMI EDID, see ComPair for further instructions.

for the code.

2009-Dec-18

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