Philips JL2.1E AA Service Manual

Colour television Chassis

JL2.1E

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Contents Page Contents Page

1. Technical Specifications, Connections, and Chassis Overview 2

2. Safety Instructions, Warnings, and Notes 6

3. Directions for Use 8

4. Mechanical Instructions 9

5. Service Modes, Error Codes, and Fault Finding 16

6. Block Diagrams, Testpoint Overview, and

Waveforms

Wiring Diagram (32”) LCD SHARP 35 Wiring Diagram (37”) LCD LPL 36 Wiring Diagram (42”) LCD LPL 37 Block Diagram Supply + Standby (32”) 38 Block Diagram Supply + Standby (37”) 39 Block Diagram Supply + Standby (42”) 40 Block Diagram Video 41 Block Diagram Audio 42 Block Diagram Control + Clock Signals 43 I2C overview 44 Supply Lines Overview 45

7. Circuit Diagrams and PWB Layouts Drawing PWB LCD Supply (32”): Mains Filter + Standby (A1) 46 48-51 LCD Supply (32”): Supply (A2) 46 48-51 LCD Supply (37”): Mains Filter + Standby (A1) 52 54-53 LCD Supply (37”): Supply (A2) 53 54-53 LCD Supply (42” - v2): MF + Standby Part A(A1)56 60-65 LCD Supply (42” - v2): Supply Part A (A2) 57 60-65 LCD Supply (42” - v2): MF + Standby Part B(A3)58 60-65 LCD Supply (42” - v2): Supply Part B (A4) 59 60-65 LCD Supply (42” - v3): MF + Standby Part A(A1)66 70-75 LCD Supply (42” - v3): Supply Part A (A2) 67 70-75 LCD Supply (42” - v3): MF + Standby Part B(A3)68 70-75 LCD Supply (42” - v3): Supply Part B (A4) 69 70-75 Interface Panel DC / DC (AB) 76 77 Ambi Light Panel (AL) 78 79

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

SSB (v2) (B) 80-127 132-141 SSB: Signal Lines Overview (v2) Part 1 128 SSB: Signal Lines Overview (v2) Part 2 129 SSB (v3: delta w.r.t. v2) (B) 142-163 168-177 SSB: Signal Lines Overview (v3) Part 1 164 SSB: Signal Lines Overview (v3) Part 2 165 External I/O part 1 (BE1) 178 180 External I/O part 2 (BE2) 179 180 Side I/O Panel (v2) (D) 181 182 Side I/O Panel (v3) (D) 183 184 Control Board (Top Control) (E) 185 186 LED Panel (J) 187 188 Standby/Audio Panel: Connections (SA1) 189 192-194 Standby/Audio Panel: Standby (SA2) 190 192-194 Standby/Audio Panel: Audio (SA3) 191 192-194

8. Alignments 195

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets 200 Abbreviation List 221 IC Data Sheets 224

10. Spare Parts List 237

11. Revision List 254

Published by EL 0569 TV Service Printed in the Netherlands Subject to modification EN 3122 785 15710

EN 2 JL2.1E AA1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Connections

1.3 Chassis Overview

Notes:

• Figures can deviate due to the different set executions.

• Specifications are indicative (subject to change).

1.1 Technical Specifications

1.1.1 Vision

Display type : LCD Screen size : 32” (82 cm), 16:9

: 37” (94 cm), 16:9 : 42” (107 cm), 16:9

Resolution (HxV pixels) : 32”: 1366(*3)x768

: 37”: 1920(*3)x1080 : 42”: 1920(*3)x1080

Dynamic contrast ratio : 32”: 6000:1

: 37”: 5000:1

Light output (cd/m

Typical LCD response time (ms) : 32”, 42”: 8

Viewing angle (HxV degrees) : 176 Tuning system : PLL Colour systems : PAL B/G, D/K, I

Supported computer formats (60 Hz) : 640x480

Supported video formats : 640x480i - 1fH

AV (playback only) : NTSC, PAL, SECAM Tuner bands : UHF, VHF, S, Hyper

) : 32”, 37”: 550

: 42”: 4000:1

: 42”: 500

: 37”: 6

: SECAM B/G, D/K, L/L’

: 800x600 : 1024x768 : 1366x768

: 720x576i - 1fH : 640x480p - 2fH : 720x576p - 2fH : 1920x1080i - 2fH : 1280x720p - 3fH

1.1.3 Multimedia

Supported digital media : Compact Flash I & II

Supported file formats : JPEG

USB input : USB2.0

1.1.4 Miscellaneous

Power supply:

- Mains voltage (V

- Mains frequency (Hz) : 50 / 60

Ambient conditions:

- Temperature range (°C) : +5 to +40

- Maximum humidity : 90% R.H.

Power consumption (values are indicative)

- Normal operation (W) : 32”: 163

- Stand-by (W) : < 2

Dimensions (WxHxD cm) : 32”: 1000x605x96

Weight (kg) : 32”: 20

) : 220 - 240

: Memory Stick : Microdrive : SD / mini SD Card : Multi Media Card : Smart Media Card

:MP3 : Slideshow (.alb) : DivX 5 (only 42”) : MPEG1, 2, 4(only 42”) : XviD (only 42”)

: 37”: 221 : 42”: 239

: 37”: 1130x680x96 : 42”: 1238x755x96

: 37”: 27 : 42”: 35

1.1.2 Sound

Sound systems : AV stereo,

Maximum power (W

) : 2 x 15 (int.)

RMS

: 2CS B/G, D/K : NIC. B/G, D/K, I, L/L’

Technical Specifications, Connections, and Chassis Overview

1.2 Connections

Figure 1-1 Connection overview

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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.

1.2.1 Side Connections

Headphone (Output)

Bk - Headphone 32 - 600 ohm / 10 mW ot

Cinch: Video CVBS - In, Audio - In

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

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

/ 75 ohm jq

SVHS (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 ohm j

P / 75 ohm j

1.2.2 Rear Connections

Aerial - In

- IEC-type Coax, 75 ohm D

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

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Figure 1-2 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 - n.c. 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

DVI-I: Digital/Analogue Video - In

18 916

C1 C2

C3 C4

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Figure 1-3 DVI-I connector

1-D2- j 2-D2+ j 3 - Shield Gnd H 4-D4- j 5-D4+ j 6 - DDC_SCL DDC clock k 7 - DDC_SDA DDC data jk 8 - V-sync 0 - 5 V j 9-D1- j 10 - D1+ j 11 - Shield Gnd H 12 - D3- j 13 - D3+ j 14 - +5V j 15 - Ground Gnd H 16 - HPD Hot Plug Detect j 17 - D0- j 18 - D0+ j 19 - Shield Gnd H 20 - D5- j 21 - D5+ j 22 - Shield Gnd H 23 - CLK+ j 24 - CLK- j C1 - Video Red 0.7 V C2 - Video Green 0.7 V C3 - Video Blue 0.7 V C4 - H-sync 0 - 5 V j

/ 75 ohm j

C5 - Ground Gnd H

Cinch: DVI Audio - In

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

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

Digital Audio: S/PDIF - In/Out

Bk - Coaxial 0.2 - 0.6V

/ 75 ohm jq

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Technical Specifications, Connections, and Chassis Overview

Bk - Coaxial 0.2 - 0.6VPP / 75 ohm jq Bk - Coaxial 0.4 - 0.6V

/ 75 ohm kq

EXT4 Cinch: Video YPbPr - In

Gn - Video Y 1 V Bu - Video Pb 0.7 V Rd - Video Pr 0.7 V

/ 75 ohm jq

RJ45: Ethernet (if present)

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Figure 1-4 Ethernet connector

1 - TD+ Transmit signal k 2 - TD- Transmit signal k 3 - RD+ Receive signal j 4-n.c. 5-n.c. 6 - RD- Receive signal j 7-n.c. 8-n.c.

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

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Figure 1-5 SCART connector

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

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm 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 kohm j

RMS

/ 75 ohm jk

4.5 - 7 V: EXT 16:9

9.5 - 12 V: EXT 4:3 j 9 - Ground Green Gnd H 10 - Easylink P50 0 - 5 V / 4.7 kohm jk 11 - Video Green 0.7 V 12 - n.c.

/ 75 ohm 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 ohm j

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

/ 75 ohm k

/ 75 ohm j

EXT2: Video RGB/YC - In, CVBS - In/Out, Audio - In/Out

1 - Audio R 0.5 V 2 - Audio R 0.5 V 3 - Audio L 0.5 V 4 - Ground Audio Gnd H

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm k

RMS

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

/ 10 kohm j

RMS

/ 75 ohm jk

8 - Function Select 0 - 2 V: INT

4.5 - 7 V: EXT 16:9

9.5 - 12 V: EXT 4:3 j 9 - Ground Green Gnd H 10 - Easylink P50 0 - 5 V / 4.7 kohm jk 11 - Video Green/Y 0.7 V

/ 75 ohm j

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

/ 75 ohm j

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

/ 75 ohm k

/ 75 ohm j

EXT3: Video CVBS - In/Out, Audio - In

1-n.c. 2 - Audio R 0.5 V 3-n.c.

/ 10 kohm j

RMS

4 - Ground Audio Gnd H 5 - Ground Blue Gnd H 6 - Audio L 0.5 V

/ 10 kohm j

RMS

7-n.c. 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 - n.c. 12 - n.c. 13 - Ground Red Gnd H 14 - Ground Data Gnd H 15 - n.c. 16 - n.c. 17 - Ground Video Gnd H 18 - Ground FBL Gnd H 19 - Video CVBS 1 V 20 - Video CVBS 1 V

/ 75 ohm k

/ 75 ohm j

21 - Shield Gnd H

Cinch: Audio - Out

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

/ 10 kohm kq

RMS

/ 10 kohm kq

RMS

Service Connector (UART)

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

Technical Specifications, Connections, and Chassis Overview

1.3 Chassis Overview

CONTROL PANEL

STANDBY /

AUDIO PANEL

EN 5JL2.1E AA 1.

AMBILIGHT

INVERTER PANEL

SMALL SIGNAL

BOARD

MULTIMEDIA CARD READER

LED PANEL

CONTROL PANEL

Figure 1-6 PWB locations (32” model)

AMBILIGHT INVERTER PANEL

LCD SUPPLY

PA NE L

SIDE I/O PANEL

EXTERNAL

I/O PANEL

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STANDBY / AUDIO PANEL

SMALL SIGNAL BOARD

MULTIMEDIA CARD READER

LED PANEL

AMBILIGHT INVERTER PANELS : These are located in the rear cover.

Figure 1-7 PWB locations (37” and 42” models)

LCD SUPPLY

PANEL

SIDE I/O PANEL

EXTERNAL

I/O PANEL

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Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

Index of this chapter:

2.1 Safety Instructions

2.2 Warnings

2.3 Notes

2.1 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 Mohm and 12 Mohm.

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.

2.2 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. Available ESD protection equipment: – Complete kit ESD3 (small tablemat, wristband,

connection box, extension cable and earth cable) 4822 310 10671.

– Wristband tester 4822 344 13999.

• 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.

2.3 Notes

2.3.1 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 (see chapter 5) with a colour bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or

61.25 MHz for NTSC (channel 3).

• Where necessary, measure the waveforms and voltages

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

• The semiconductors indicated in the circuit diagram and in the parts lists, are interchangeable per position with the semiconductors in the unit, irrespective of the type indication on these semiconductors.

• Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the “double-D symbol”, are trademarks of Dolby Laboratories.

2.3.2 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 kohm).

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

• All capacitor values are given in micro-farads (µ= x10 nano-farads (n= x10

• 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 in the Spare Parts List. Therefore, always check this list when there is any doubt.

2.3.3 Rework on BGA (Ball Grid Array) ICs

General

Although (LF)BGA assembly yields are very high, there may still be a requirement for component rework. By rework, we mean the process of removing the component from the PWB and replacing it with a new component. If an (LF)BGA is removed from a PWB, the solder balls of the component are deformed drastically so the removed (LF)BGA has to be discarded.

Device Removal

As is the case with any component that, is being removed, it is essential when removing an (LF)BGA, that the board, tracks, solder lands, or surrounding components are not damaged. To remove an (LF)BGA, the board must be uniformly heated to a temperature close to the reflow soldering temperature. A uniform temperature reduces the risk of warping the PWB. To do this, we recommend that the board is heated until it is certain that all the joints are molten. Then carefully pull the component off the board with a vacuum nozzle. For the appropriate temperature profiles, see the IC data sheet.

Area Preparation

When the component has been removed, the vacant IC area must be cleaned before replacing the (LF)BGA. Removing an IC often leaves varying amounts of solder on the mounting lands. This excessive solder can be removed with either a solder sucker or solder wick. The remaining flux can be removed with a brush and cleaning agent. After the board is properly cleaned and inspected, apply flux on the solder lands and on the connection balls of the (LF)BGA. Note: Do not apply solder paste, as this has been shown to result in problems during re-soldering.

-9

), or pico-farads (p= x10

-12

-6

Safety Instructions, Warnings, and Notes

EN 7JL2.1E AA 2.

Device Replacement

The last step in the repair process is to solder the new component on the board. Ideally, the (LF)BGA should be aligned under a microscope or magnifying glass. If this is not possible, try to align the (LF)BGA with any board markers. So as not to damage neighbouring components, it may be necessary to reduce some temperatures and times.

More Information

For more information on how to handle BGA devices, visit this URL: www.atyourservice.ce.philips.com (needs subscription, not available for all regions). After login, select “Magazine”, then go to “Workshop Information”. Here you will find Information on how to deal with BGA-ICs.

2.3.4 Lead-free Solder

Philips CE is producing lead-free sets (PBF) from 1.1.2005 onwards.

Identification: The bottom line of a type plate gives a 14-digit serial number. Digits 5 and 6 refer to the production year, digits 7 and 8 refer to production week (in example below it is 1991 week 18).

Figure 2-1 Serial number example

Regardless of the special lead-free logo (which is not always indicated), one must treat all sets from this date onwards according to the rules as described below.

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avoid mixed regimes. If this cannot be avoided, carefully clear the solder-joint from old tin and re-solder with new tin.

• Use only original spare-parts listed in the Service-Manuals. Not listed standard material (commodities) has to be purchased at external companies.

• Special information for lead-free BGA ICs: these ICs will be delivered in so-called "dry-packaging" to protect the IC against moisture. This packaging may only be opened shortly before it is used (soldered). Otherwise the body of the IC gets "wet" inside and during the heating time the structure of the IC will be destroyed due to high (steam-) pressure inside the body. If the packaging was opened before usage, the IC has to be heated up for some hours (around 90°C) for drying (think of ESD-protection!). Do not re-use BGAs at all!

• For sets produced before 1.1.2005, containing leaded soldering tin and components, all needed spare parts will be available till the end of the service period. For the repair of such sets nothing changes.

In case of doubt whether the board is lead-free or not (or with mixed technologies), you can use the following method:

• Always use the highest temperature to solder, when using SAC305 (see also instructions below).

• De-solder thoroughly (clean solder joints to avoid the mixing of two alloys).

Caution: For BGA-ICs, you must use the correct temperature profile, which is coupled to the 12NC. For an overview of these profiles, visit the website www.atyourservice.ce.philips.com (needs subscription, but is not available for all regions). You will find this and more technical information within the "Magazine", chapter "Workshop information". For additional questions please contact your local repair help desk.

2.3.5 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.

Figure 2-2 Lead-free logo

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

• Use only lead-free soldering tin Philips SAC305 with order code 0622 149 00106. 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 stabilise 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 stabilised 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

EN 8 JL2.1E AA3.

3. Directions for Use

Directions for Use

You can download this information from the following websites: http://www.philips.com/support http://www.p4c.philips.com

Notes:

• As the software upgrade is a new feature, it is explained below.

• Figures can deviate due to the different set executions.

4. Mechanical Instructions

Mechanical Instructions

EN 9JL2.1E AA 4.

Index of this chapter:

4.1 Cable Dressing

4.2 Service Position

4.3 Assy/PWB (Dis)Assembly

4.4 Display Disassembly

4.5 Set Re-assembly

4.1 Cable Dressing

4.1.1 Chassis

Notes:

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

• Follow the disassemble instructions in described order.

• For “simple” actions, the descriptions will be only textual, where the more complicated ones will be clarified with figures.

Figure 4-1 Chassis cable dressing (32” model)

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Figure 4-2 Chassis cable dressing (37” and 42” models)

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4.2 Service Position

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

• The buffers from the packaging.

• Foam bars (created for Service).

• Aluminium service stands (created for Service).

4.2.1 Foam Bars

Mechanical Instructions

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Figure 4-5 Metal back plate

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Figure 4-3 Foam bars

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

4.2.2 Aluminium Stands

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Figure 4-4 Aluminium stands (Mk1)

The new (Mk2) aluminium stands (order code 3122 785 90690) can also be used to do measurements, alignments, and duration tests. The stands can be (dis)mounted quick and easy by means of sliding them in/out the "mushrooms". Important: For (older) FTV sets without these "mushrooms", it is obligatory to use the provided screws, otherwise it is possible to damage the monitor inside!.

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1. Place the TV set upside down on a table top, using the foam bars (see part "Foam Bars"). Caution: do not put pressure on the LCD display, but let the monitor lean on the speakers or the Front cover.

2. Remove all T10 parker screws (1) from the top, left, and right side of the metal back plate.

3. Remove all T10 tapping screws (2) from the centre and bottom side of the metal back plate.

4. Lift the plate from the set. (it hinges at the bottom side).

4.3.2 Rear Cover

4 4

Figure 4-6 Rear cover (32” model)

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4.3 Assy/PWB (Dis)Assembly

4.3.1 Metal Back Plate

Caution: Disconnect the mains power cord before you remove

the metal back plate.

Figure 4-7 Rear cover (37” and 42” models)

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1. Disconnect all connectors (3) from the Ambient Light

s 4

inverter panels.

2. Remove all screws (4) around the edges of the rear cover.

3. Remove all screws (5) from the rear cover.

4. Lift the rear cover from the set. Make sure that wires and flat foils are not damaged during the removal.

4.3.3 NXT Speakers

Mechanical Instructions

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Figure 4-8 Speaker mounting screws at the rear side

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Figure 4-9 Front cover removal

Figure 4-11 Speaker removal

1. Remove all speakers mounting screws [1] at the rear side of the set (one screw is located under the Card reader / Side I/O).

2. Flip the set over (be aware that the front cover is loose now), and remover the front cover [2].

3. Remove all speakers mounting screws [3] at the LCD side.

4. Release the speaker cable from its fixations

5. Take out the speaker unit [4].

4.3.4 Ambient Light Inverter Panel(s)

These models are equipped with two AmbiLight Inverters.

1. Disconnect all cables at the Inverter panels.

2. Remove all mounting screws from the panels. – For the 32” model, the panels are mounted on the

metal frame. It might be necessary to remove the mounting bars first as they cover these screws partly.

– For the 37” and 42” models, the panels are mounted

inside the rear cover.

3. Take out the panel.

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Figure 4-10 Speaker mounting screws at the front side

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Figure 4-12 Ambilight inverter panels (37” and 42”)

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4.3.5 Top Control

1. Disconnect all cables from the panel.

2. Remove all mounting screws from the panel.

3. Release the clamps and take out the panel.

4.3.6 Stand-by Supply / Audio Amplifier Panel

1. Disconnect all cables from the panel.

2. Remove all mounting screws from the panel.

3. Take out the panel (it hinges at the bottom side).

4.3.7 DC/DC Interface Panel (only for 32” model)

1. Disconnect all cables from the panel.

2. Release the clamps and take out the panel.

4.3.8 Main Supply Panel

Mechanical Instructions

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1. Disconnect all cables from the panel.

2. Remove all mounting screws from the panel.

3. Take out the panel (it hinges at the right side).

4.3.9 SSB

Figure 4-13 LVDS connector locking bracket

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Figure 4-15 SSB top shielding

Figure 4-16 Connector plate

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Figure 4-14 SSB top shielding screws

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For

PDP

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Figure 4-17 SSB brackets

1. 1st Figure: Remove the LVDS connector locking bracket [1], [2].

2. 2nd Figure: Remove all shielding fixing screws [2].

3. 3rd Figure: Slide, and lift the shielding at the top [3] (Note: in some cases a piece of tape is used at the left underside of the SSB. This tape must be cut or removed before you can lift the shielding). The panel hinges at the SCART side.

At the same time, use a screwdriver to carefully prize the

s 5

shielding at the bottom side [4], and remove the shielding. The SSB is now accessible.

4. To remove the whole SSB, unscrew all connector fixing screws from the connector plate [5] + [6] + [7]. Use a 5 mm socket screwdriver to remove both DVI connector distance bolts [6].

5. Disconnect the LVDS cable, and all other cables.

6. Remove the mounting screw [8] from the SSB.

7. Bend the brackets [9] away (may require some force), lift the SSB, and take it out.

4.3.10 SCART Panel

1. Disconnect all cables from the panel.

2. Remove the mounting screws [7] beside the SCART connectors at the connector plate (see figure” Connector plate").

3. Take out the SCART panel.

Mechanical Instructions

EN 13JL2.1E AA 4.

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4.3.11 Digital Media Reader

1. Disconnect the USB cable at the SSB and the power line at the Stand-by/Audio panel.

2. Remove all mounting screws from the module.

3. Take out the module (replace complete module if defect).

4.3.12 LED Panel

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Figure 4-20 LED panel (part 3)

1. Disconnect all cables from the LED panel [1][2].

2. To access the mounting screws you have to remove the Digital Media Reader.

3. Remove the shielding mounting screws [3]: one of them is hidden under a piece of tape.

4. Take out the panel.

4.3.13 Woofer

1. Remove all mounting screws.

2. Take out the woofer unit together with its cable.

Caution: the woofer unit must remain airtight.

4.3.14 Side I/O Panel

1. Disconnect all cables from the panel.

2. Remove all mounting screws (if present) from the panel.

3. Slide the bracket to the right.

4. Release the clamp and take out the panel.

Figure 4-18 LED panel (part 1)

Figure 4-19 LED panel (part 2)

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EN 14 JL2.1E AA4.

4.4 Display Disassembly

Important: Be sure to work in a dust free environment during

the following activities. In addition, the use of (fabric) hand gloves is advised.

Mechanical Instructions

1+2

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Figure 4-21 Cable disconnecting overview

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1 2

Fragile !

Figure 4-22 LCD display connectors

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Figure 4-23 LCD panel screws location

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Figure 4-24 Backlight cable removal (left side)

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Figure 4-25 Chassis after PWB frame removal

Mechanical Instructions

220905

1. Important: Unplug the cables [1] + [2] at the LCD display

2. Remove the Top Control ass’y [3]. No need to unplug.

3. Unplug the following cables and remove them

4. Remove all T10 screws [5] from the mounting frame.

5. Remove all T20 mounting LCD panel screws [6].

6. Lift the metal frame (together with all PWBs) from the LCD

7. After removal of the metal frame, you can lift the plastic

8. Now, the bare LCD panel is accessible.

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EN 15JL2.1E AA 4.

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Figure 4-27 Metal fixation bars 32” model

(cable [2] is only present in 32” models). Be careful, as the LVDS connector [1] is very fragile!

completely from their cable fixations: – Card reader cable (USB with supply) at SSB [4a]. – Speaker cables (L, R, and woofer) at SA panel [4b]. – Flat cable on Side I/O panel [4c]. – Flat cable on LED panel [4d].

panel. During lift, free the backlight cables [7].

frame from the set.

Important: On the 32” LCD display two metal fixation bars are mounted at the top and bottom side (see figure “Metal fixation bars 32” model“). These must be removed before sending the display to Service if the display is defective.

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Figure 4-26 Bare LCD panel (37”) after plastic frame removal

4.5 Set Re-assembly

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

Note: While re-assembling the TV, make sure that:

• All cables are placed and connected in their original position (see figure “Chassis cable dressing” in the beginning of this chapter and/or the “Wiring Diagram” in chapter 6).

• LVDS connector (SSB) is secured with plastic clamp.

• The "grounding" wire between metal shielding of the LED panel and the TV frame is connected.

EN 16 JL2.1E AA5.

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 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

The chassis is equipped with test points (Fxxx) printed on the circuit board assemblies. As most signals are digital, it will be difficult to measure waveforms with a standard oscilloscope. 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.

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. Minimum requirements for ComPair: a Pentium processor, a Windows OS, and a CD-ROM drive (see also paragraph "ComPair").

– Auto switch "off" (when no video signal was received

for 10 minutes). – Skip/blank of non-favourite pre-sets. – Smart modes. – Auto store of personal presets. – Auto user menu time-out.

How to Activate SDM

Use one of the following methods:

• Use the standard RC-transmitter and key in the code “062596”, directly followed by the “MENU” button. Note: It is possible that, together with the SDM, the main menu will appear. To switch it "off", push the “MENU” button again.

• Short for a moment the two solder pads [1] on the SSB, with the indication “SDM”. They are located outside the shielding. Activation can be performed in all modes, except when the set has a problem with the Stand-by Processor. See figure “Service mode pads”.

2 1

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Figure 5-1 Service mode pads

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 (only applicable for 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 paragraph “Stepwise Start Up”.

• To start the blinking LED procedure (not valid in protection mode).

Specifications

Table 5-1 SDM default settings

Region Freq. (MHz)

Europe, AP-PAL/Multi 475.25 PAL B/G

NAFTA, AP-NTSC, LATAM 61.25 (ch. 3) NTSC M

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

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

• 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).

Default system

After activating this mode, “SDM” will appear in the upper right corner of the screen (if you have a picture).

How to Navigate

When you press the “MENU” button 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.

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

Service Modes, Error Codes, and Fault Finding

EN 17JL2.1E AA 5.

Contents of SAM:

• Hardware Info. – A. VIPER SW Version. Displays the software version

of the VIPER software (main software) (example: JX21E-1.2.3.4_12345 = AAAAB_X.Y.W.Z_NNNNN).

• AAAA= the chassis name.

• B= the region: A= AP, E= EU, L= LatAm, U = US.

• X.Y.W.Z= the software version, where X is the main version number (different numbers are not compatible with one another) and Y is the sub version number (a higher number is always compatible with a lower number). The last two digits are used for development reasons only, so they will always be zero in official releases.

• NNNNN= last five digits of 12nc code of the software.

– 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 maximal 10 errors). The most recent error is displayed at the upper left (for an error explanation see paragraph “Error Codes”).

• Defective Module. Here the module that generates the error is displayed. If there are multiple errors in the buffer, which are not all generated by a single module, there is probably another defect. It will then display the message “UNKNOWN” here.

• Reset Error Buffer. When you press “cursor right” and then the “OK” button, the error buffer is reset.

• Alignments. This will activate the “ALIGNMENTS” submenu.

• Dealer Options. Extra features for the dealers.

• Options. Extra features for Service.

• Initialise NVM. When an NVM was corrupted (or replaced) in the former EMG based chassis, the microprocessor replaces the content with default data (to assure that the set can operate). However, all preferences and alignment values are gone now, and option numbers are not correct. Therefore, this was a very drastic way. In this chassis, the procedure is implemented in another way: The moment the processor recognizes a corrupted NVM, the “initialize NVM” line will be highlighted. Now, you can do two things (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 (same as in the past, however now it

happens conscious).

Note: When you have a corrupted NVM, or you have replaced the NVM, there is a high possibility that you will not have picture any more because your display option is not correct. So, before you can initialize your NVM via the SAM, you need to have picture and therefore you need the correct display option. To adapt this option, you can use ComPair (the correct HEX values for the options can be found in the table below) or a new 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” button and “XXX” (where XXX is the 3 digit decimal display option code as mentioned in the first column of the next table). 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 initialised first (loaded with default values). This initialising can take up to 20 seconds.

Table 5-2 Display option code overview

Display Option

000 00 PDP SDI HD V3 42” 768p

001 01 PDP SDI HD V3 50” 768p

002 02 PDP FHP ALiS 1024i 42” 1024i

003 03 LCD LPL 30” 768p

004 04 LCD LPL 37” 768p

005 05 LCD LPL 42” 768p

006 06 LCD SHARP 32” 768p

007 07 PDP SDI SD V3 42” 480p

008 08 PDP FHP ALiS 1024i 37” 1024i

009 09 LCOS XION - 720p

010 0A LCD AUO 30” 768p

011 0B LCD LPL 32” 768p

012 0C LCD AUO 32” 768p

013 0D LCD SHARP 37” 768p

014 0E LCD LPL HD 42” 1080p

015 0F PDP SDI SD 37” 480p

016 10 PDP FHP ALiS 1080i 37” 1080i

017 11 PDP FHP ALiS 580i 42” 1080i

018 12 PDP FHP 55” 768p

019 13 LCOS VENUS - 720p

020 14 LCOS VENUS - 1080p

021 15 LCD LPL 26” 768p

022 16 LCD LPL scanning Backlight 32” 768p

023 17 PDP LG SD 42” 480p

024 18 PDP SDI SD V4 42” 480p

025 19 PDP SDI HD V4 42” 768p

026 1A PDP FHP HD A2 42” 1024i

027 1B PDP SDI HD V4 50” 768p

028 1C LCD Sharp full HD 37” 1080p

029 1D LCD AUO 32” 768p

030 1E LCD CMO full HD 37” 1080p

031 1F LCD Sharp full HD V3.0 37” 1080p

032 20 LCD LPL 20” 768p

033 21 LCD QDI 23” 768p

HEX Display Type Size Vertical

Resolution

• Store. All options and alignments are stored when pressing “cursor right” 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 info.

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

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

How to Navigate

• In SAM, you can select the menu items with the “CURSOR UP/DOWN” key on the RC-transmitter. 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, it is possible to: – (De) activate the selected menu item. – (De) activate the selected sub menu.

How to Exit SAM

Use one of the following methods:

• Press the “MENU” button on the RC-transmitter.

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

EN 18 JL2.1E AA5.

Service Modes, Error Codes, and Fault Finding

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.

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, you can navigate through the menus.

Contents of CSM

• SW Version (example: JX21E-1.2.3.4_12345). 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.

• SBY Processor Version. Displays the built-in stand-by processor software version. Upgrading this software will be possible via a PC and a ComPair interface (see chapter Software upgrade).

• 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 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 possibility to do this.

• Code 1. Gives the latest five errors of the error buffer. As soon as the built-in diagnose software has detected an error the buffer is adapted. The last occurred error is displayed on the leftmost position. Each error code is displayed as a 2-digit number. When less than 10 errors occur, the rest of the buffer is empty (00). See also paragraph Error Codes for a description.

• Code 2. Gives the first five errors of the error buffer. See also paragraph Error Codes for a description.

• Headphone Volume. Gives the last status of the headphone volume, as set by the customer. The value can vary from 0 (volume is minimum) to 100 (volume is maximum). Change via ”MENU”, “TV”, “SOUND”, “HEADPHONE VOLUME”.

• Dolby. Indicates whether the received transmitter transmits Dolby sound (“ON”) or not (“OFF”). Attention: The presence of Dolby can only be tested by the software on the Dolby Signalling bit. If a Dolby transmission is received without a Dolby Signalling bit, this indicator will show “OFF” even though a Dolby transmission is received.

• Surround Mode. Indicates the by the customer selected sound mode (or automatically chosen mode). Possible values are “STEREO” and “VIRTUAL DOLBY SURROUND”. Change via “MENU”, “TV”, “SOUND”, “SURROUND MODE”. It can also have been selected automatically by signalling bits (internal software).

• Tuner Frequency. Indicates the frequency the selected transmitter is tuned to.

• Digital options. Indicates the selected digital mode. Possible values are “STANDARD” and “PIXEL PLUS 2”

and “MOVIE PLUS”. Change via “MENU”, “TV”, “PICTURE”, “DIGITAL OPTIONS”.

• TV System. Gives information about the video system of the selected transmitter. – BG: PAL BG signal received – DK: PAL DK signal received – L/La: SECAM L/La signal received – I: PAL I signal received – M: NTSC M signal received – ATSC: ATSC signal received

• Centre Mode. Not applicable.

• DNR. Gives the selected DNR setting (Dynamic Noise Reduction), “OFF”, “MINIMUM”, “MEDIUM”, or “MAXIMUM”. Change via “MENU”, “TV”, “PICTURE”, “DNR”

• Noise Figure. Gives the noise ratio for the selected transmitter. This value can vary from 0 (good signal) to 127 (average signal) and to 255 (bad signal). For some software versions, the noise figure will only be valid when “Active Control” is set to “medium” or “maximum” before activating CSM.

• Source. Indicates which source is used and the video/ audio signal quality of the selected source. (Example: Tuner, Video/NICAM) Source: “TUNER”, “EXT1”, “EXT2”, “EXT3”, “EXT4”, “HDMI”, “SIDE” and “DVI”. Video signal quality: “VIDEO”, “S-VIDEO”, “RGB 1FH”, “YPBPR 1FH 480P”, “YPBPR 1FH 576P”, “YPBPR 1FH 1080I”, “YPBPR 2FH 480P”, “YPBPR 2FH 576P”, “YPBPR 2FH 1080I”, “RGB 2FH 480P”, “RGB 2FH 576P”, “RGB 2FH 1080I”, “720p” or “Unsupported”. Audio signal quality: “STEREO”, “SPDIF 1”, “SPDIF 2”, or “SPDIF”.

• Audio System. Gives information about the audible audio system. Possible values are “Stereo”, ”Mono”, “Mono selected”, “Analog In: No Dig. Audio”, “Dolby Digital 1+1”, “Dolby Digital 1/0”, “Dolby Digital 2/0”, “Dolby Digital 2/1”, “Dolby Digital 2/2”, “Dolby Digital 3/0”, “Dolby Digital 3/1”, “Dolby Digital 3/2”, “Dolby Digital Dual I”, “Dolby Digital Dual II”, “MPEG 1+1”, “MPEG 1/0”, “MPEG 2/0”. This is the same info as you will see when pressing the “INFO” button in normal user mode (item “signal”). In case of ATSC receiving there will be no info displayed.

• Tuned Bit. Indicates if the selected preset is automatically tuned (via “Automatic Installation” in the setup menu) or via the automatic tuning system of the TV. In this case “Tuned bit” will show “YES”. If the TV was not able to auto-tune to the correct frequency, this item will show “NO”. So if “NO” is displayed, it could indicate that the customer has manually tuned to a frequency which was too for to a correct frequency, that the TV was not able to auto-tune any more.

• On timer. Indicates if the “On timer” is set “ON” or “OFF” and when it is set to “ON”, also start time, start day and program number is displayed. Change via “MENU”, “TV”, “FEATURES”, “ON TIMER”.

• Preset Lock. Indicates if the selected preset has a child lock: “LOCKED” or “UNLOCKED”. Change via “MENU”, “TV”, “FEATURES”, “CHILD LOCK” and “CUSTOM LOCK” and “CHANNEL LOCK”.

• Child lock. Indicates if “Child lock” is set to “UNLOCK”, “LOCKED” or “CUSTOM LOCK. Change via “MENU”, “TV”, “FEATURES”, “CHILD LOCK”.

• Lock after. Indicates at what time the channel lock is set: “OFF” or e.g. “18:45” (lock time). Change via “MENU”, “TV”, “FEATURES”, “CHILD LOCK”, “CUSTOM LOCK” and “LOCK AFTER”.

• 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).

• AVL. Indicates the last status of AVL (Automatic Volume Level): “ON” or “OFF”. Change via “MENU”, “TV”, “SOUND”, “AVL”. AVL can not be set in case of digital audio reception (e.g. Dolby Digital or AC3)

• Delta Volume. Indicates the last status of the delta volume for the selected preset as set by the customer: from “-12”

Service Modes, Error Codes, and Fault Finding

to “+12”. Change via “MENU”, “TV”, “SOUND”, “DELTA VOLUME”.

• HDMI key validity. Indicates the key’s validity.

How to Exit CSM

Press any key on the RC-transmitter (with exception of the “CHANNEL +/-”, “VOLUME”, “MUTE” and digit (0-9) keys).

5.3 Stepwise Start-up

The stepwise start-up method, as known from FTL/FTP sets (EMG based sets) is not valid any more. The situation for this chassis is as follows: when the TV is in a protection state detected via the Stand-by Processor (and thus blinking an error) and SDM is activated via shortcutting the pins 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. Important to know here is, that if e.g. the 3V3 detection fails (and thus error 11 is blinking) and the TV is restarted via SDM, the Stand-by Processor will enable the 3V3, but will not go to protection now. The TV will stay in this situation until it is reset (Mains/AC Power supply interrupted).

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 VIPER Main

Processor.

EN 19JL2.1E AA 5.

St by

'Off'

Tact SW

pushed

Tact SW pushed

St by

Mains

“off”

- WakeUp requested

- Acquisition needed

- No data Acquisition required

- Tact SW pushed

Off

Mains

Semi St by

“on”

GoToProtection

WakeUp

requested

- St by

- Tact SW

WakeUp

requested

pushed

Active

GoToProtection

Tact SW pushed

Protection

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Figure 5-2 Transition diagram

EN 20 JL2.1E AA5.

Service Modes, Error Codes, and Fault Finding

Off

Mains is applied

Standby Supply starts running.

+5V2, 1V2Stb, 3V3Stb and +2V5D become present.

In case of PDP 3V3 Vpr to CPU PDP becomes present.

St-by µP resets

All I/O lines have a “high” default state:

- Sound-Enable and Reset-Audio should remain “high”.

- NVM power line is “high”, no NVM communication possible.

Initialise I/O pins of the st-by µP, start keyboard scanning, RC

detection, P50 decoding. Wake up reasons are “off”.

Switch “low” the NVM power reset line. Add a 2ms delay before

trying to address the NVM to allow correct NVM initialization.

Switch Main Supply to “on” by switching “low” the

- Assert the Viper reset.

ON-MODE and the POD-MODE I/O lines.

+5V, Vtu n, +8V6 , +12 VSW, +5V2S, Vsou nd

and +12/24V are switched “on”.

Wait 50ms and then start polling the detect-

5V, detect-8V6 and detect-12V every 40ms.

Stand by or

Protection

If the protection state was left by short circuiting the

SDM pins, detection of a protection condition during

startup will stall the st artup . Protectio n conditions in a

playing se t will be ignored. The protection mode will

- Switch Sound-Enable & Reset-Audio “high”. They are “low” in the standby mode if the

The availability of the supplies is checked through “detect” signals (delivered by

dedicated detect-IC's) going to the st-by µP. These signals are available for

+12V, +8V6, +5V, +1V2 and +2V5. A “low” to “high” transition of the signals should

occur within a certain time after toggling the standby line. If an observer is

detected before the time-out elapses, of course, the process should continue in

not be entered.

standby mode lasted longer than 2s.

order to minimize start up time.

action holder: MIPS

action holder: St-by

autonomous action

Detect-5V

received within

300 ms after POD-MODE

toggle?

Yes +5V error

Activate +5V supply detection algorithm.

Detect-12V received within

2000 ms after POD-mode

toggle?

Yes

Activate +12V supply

detection algorithm

Enable the DC/DC converter for +1.2V.

Start polling the detect-1V2 every 40ms

Detect-1V2

received within

250ms?

+12V error

No need to wait for the 8V6 detection at this point.

+1.2V error

Detect-8V6 received

within 2000 ms after POD-mode toggle?

Startup shall not wait for this detection

and continue startup.

+8V6 err or

Yes

activate +8V6 supply

detection algorithm

To part B To part B To part B To part B To part B

F_15710_152a.eps

Figure 5-3 “Off” to “Semi Stand-by” flowchart (part 1)

200905

action holder: MIPS

action holder: St-by

autonomous action

Service Modes, Error Codes, and Fault Finding

From part AFrom part A From part A From part A From part A

Detect-1V2

received within

250ms?

Yes

Enable the DC/DC converters for

+2.5V a nd +3.3 V.

Start polling the detect-2V5

and detect-3V3 every 40ms.

+1.2V err or

+8V6 error

EN 21JL2.1E AA 5.

activate +8V6 supply

detection algorithm

return

Detect-2V5 and

detect-3V3 received within

250 ms?

Activate supply detection algorithms for

Enable the supply fault detection

(pulling pin of the probe interface to

ground by inserting EJTAG probe)

Yes

+1.2V, +2. 5V and +3.3V

SUPPLY-FAULT I/O line

is “high”?

Yes

interrupt

Set I²C slave address

of Standby µP to (A0h)

Detect EJTAG debug probe

EJTAG probe

connected ?

+2.5V or +3.3 V errorNo

Supply fault errorNo

Yes

Release Viper reset

Feed warm boot script (2)

Release PNX2015 reset 100ms after

To part CTo part C To part C To part C

Cold boot?

Yes

Release Viper reset

Feed cold boot script (1)

Viper reset is released

Bootscript ready

in 1250 ms?

Yes

Set I²C slave address

of Standby µP to (64h)

RPC start (comm. protocol)

Release Viper reset

Feed initializing boot script (3)

disable alive mechanism

Release PNX2015 reset 100ms

after Viper reset is released

Figure 5-4 “Off” to “Semi Stand-by” flowchart (part 2)

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From part B From part B From part BFrom part B

action holder: MIPS

action holder: St-by

autonomous action

RPC start (comm. protocol)

3-th retry?

Yes

Log Code as

error code

Code = 5

Switch Viper in reset

Wait 10ms

Switch the NVM reset

line “high”.

Disable all supply related protections and

switch “off” the +2V5, +3V3 DC/DC conver ter.

Wait 5ms

Switch “off” the remaining DC/DC

converters

Switch POD-MODE and ON-MODE

I/O line “high”.

Code = 53

(AVIPs need to be started before the MPIF's in order to have a good clock distribution). AVIP default power-up mode is Standby. The Viper instructs AVIP via I²C to enable all the PLLs and clocks and hence enter to Full Power mode.

Wait for the +8V6 to be detected if not yet present.

(if it does not come, the standby µP will enter a

protection mode)

Initialize MPIF's . MPIF should deliver 4 observers: POR= 0; normal operation MSUP= 1: Main supply is present ASUP= 1; audio supply is present ROK= 1; reference frequency is present (coming from AVIP)

Flash to RAM image

transfer succeeded

wit h in 3 0 s?

Yes

Viper SW initialization

succeeded

wit h in 2 0 s?

Yes

Enable Alive check mechanism

MIPS reads the wake up reason

from standby µP.

Initialize PNX2015 HD subsystem

Wait until Viper starts to

communicate

All observers present with correct state?

Yes

Initialize tuners and Hirate

Initialize source sele ction

Initialize video processing ICs:

- Spider

Initialize Columbus Initialize 3D Co mbfilter Initialize AutoTV

Initialize Ambilight with Lights “off”.

Semi-Standby

Figure 5-5 “Off” to “Semi Stand-by” flowchart (part 3)

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Log appropriate

Observer error

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Service Modes, Error Codes, and Fault Finding

Semi Standby

Wait until previous on-state is left more than 1

second ago (to prevent LCD display problems).

EN 23JL2.1E AA 5.

Assert RGB video blanking

and audio mute.

Initialize audio and video processing IC's and

functions according needed use case.

Wait until QVCP generates a valid LVDS output

clock.

Switch “on” the display by sending the Output-

Enable (I²C) command to the MOP.

Wait 250ms (min. = 200ms).

(lamp ready delay)

Switch “off” RGB blanking.

Switch “on” LCD lamp after valid, stable video, corresponding

to the requested output is delivered by the Viper.

action holder: MIPS

action holder: St-by

autonomous action

Switch Audio-Reset and Sound Enable “low” and demute.

Active

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

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action holder: MIPS

action holder: St-by

Active

autonomous action

Mute all sound outputs.

Switch reset-audio and sound-enable

lines “high”

Switch “off” LCD lamp

Mute all video outputs

Switch “off” the display by sending the

Output-Enable (I²C) command to the MOP.

Semi Standby

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

Service Modes, Error Codes, and Fault Finding

EN 25JL2.1E AA 5.

Semi Stand by

Delay transition until ramping down of ambient light is

finished. *)

Switch ambient light to passive mode with RGB

values on zero. *)

Transfer Wake up reasons to the Standby µP.

Images are re-transferred to DDR-RAM from

Flash RAM (verification through checksum)

MIPS image completes the application reload,

stops DDR-RAM access, puts itself in a

sleepmode and signals the standby µP when the

standby mode can be entered.

DDR-RAM is put in self refresh mode and the images

are kept in the hibernating DDR-RAM.

action holder: MIPS

action holder: St-by

autonomous action

*) If this is not performed and the set is switched to standby when the ramping of the EPLD is still ongoing, the lights will remain lit in standby.

Wait 5ms

Switch Viper in reset state

Wait 10ms

Switch the NVM reset line “high”

Disable all supply related protections and switch

“off” the +2V5, +3V3 DC/DC converter.

Wait 5ms

Switch “off” the remaining DC/DC converters

Switch “off” all supplies by switching “high”

the ON-MODE I/O lines.

Important remark:

release reset audio and sound-

enable 2 sec after entering

standby to save power

Stand by

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

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Service Modes, Error Codes, and Fault Finding

action holder: MIPS

action holder: St-by

autonomous action

Log the appropriate error and

set stand-by flag in NVM

Redefine wake up reasons for protection

state and transfer to stand-by µP

Switch “off” LCD lamp supply

Wait 250ms (min. = 200ms)

Switch “off” LVDS signal

Switch “off” 12V LCD supply within a time frame

of min. 0.5ms to max. 50ms after LVDS switch

Ask stand-by µP to enter protection state

off.

Switch Viper in reset state

Wait 10ms

Switch the NVM reset line “high”

Disable all supply related protections and switch

“off” the +2V5, +3V3 DC/DC converter

Wait 5ms

Switch “off” remaining DC/DC converters

Switch “off” all supplies by switching “high”

Flash LED in order to indicate protection state *

the ON-MODE I/O lines

Protection

Figure 5-9 “Protection” flowchart

(*): This can be the standby LED or the ON LED depending on the availability in the set under discussion.

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5.4 Service Tools

5.4.1 ComPair

Introduction

ComPair (Computer Aided Repair) is a service tool for Philips Consumer Electronics products. ComPair is a further development on the European DST (service remote control), which allows faster and more accurate diagnostics. ComPair has three big advantages:

1. ComPair helps you to quickly get an understanding on how to repair the chassis in a short time by guiding you systematically through the repair procedures.

2. ComPair allows very detailed diagnostics (on I is therefore capable of accurately indicating problem areas. You do not have to know anything about I yourself because ComPair takes care of this.

3. ComPair speeds up the repair time since it can automatically communicate with the chassis (when the microprocessor is working) and all repair information is directly available. When ComPair is installed together with the Force/SearchMan electronic manual of the defective chassis, schematics and PWBs are only a mouse click away.

Specifications

ComPair consists of a Windows based fault finding program and an interface box between PC and the (defective) product. The ComPair interface box is connected to the PC via a serial (or RS-232) cable. For this chassis, the ComPair interface box and the TV communicate via a bi-directional service cable via the service connector(s).

The ComPair fault finding program is able to determine the problem of the defective television. ComPair can gather diagnostic information in two ways:

• Automatically (by communicating with the television): ComPair can automatically read out the contents of the entire error buffer. Diagnosis is done on I ComPair can access the I ComPair can send and receive I the microcontroller of the television. In this way, it is possible for ComPair to communicate (read and write) to devices on the I

C/UART buses of the TV-set.

• Manually (by asking questions to you): Automatic diagnosis is only possible if the microcontroller of the television is working correctly and only to a certain extent. When this is not the case, ComPair will guide you through the fault finding tree by asking you questions (e.g. Does the

screen give a picture? Click on the correct answer: YES / NO) and showing you examples (e.g. Measure test-point I7 and click on the correct oscillogram you see on the oscilloscope). You can answer by clicking on a link (e.g. text or a waveform picture) that will bring you to the next

step in the fault finding process.

By a combination of automatic diagnostics and an interactive question / answer procedure, ComPair will enable you to find most problems in a fast and effective way.

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 next picture (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!

C/UART bus of the television.

C/UART commands to

C level) and

C commands

C/UART level.

UART SERVICE

CONNECTOR

PC VCR I2CPower

Figure 5-10 ComPair interface connection

How to Order

ComPair order codes:

• Starter kit ComPair32/SearchMan32 software and ComPair interface (excl. transformer): 3122 785 90450.

• ComPair interface (excl. transformer): 4822 727 21631.

• Starter kit ComPair32 software (registration version): 3122 785 60040.

• ComPair32 CD (update): 3122 785 60070 (year 2002), 3122 785 60110 (year 2003 onwards).

• ComPair firmware upgrade IC: 3122 785 90510.

• Transformer (non-UK): 4822 727 21632.

• Transformer (UK): 4822 727 21633.

• ComPair interface cable: 3122 785 90004.

• ComPair interface extension cable: 3139 131 03791.

• ComPair UART interface cable: 3122 785 90630.

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

5.4.2 LVDS Tool

Introduction

This service tool (also called “ComPair Assistant 1“) may help you to identify, in case the TV does not show any picture, whether the Small Signal Board (SSB) or the display of a Flat TV is defective.

Since 2004, the LVDS output connectors in our Flat TV models are standardised (with some exceptions). With the two delivered LVDS interface cables (31p and 20p) you can cover most chassis (in special cases, an extra cable will be offered).

When operating, the tool will show a small (scaled) picture on a VGA monitor. Due to a limited memory capacity, it is not possible to increase the size when processing high-resolution LVDS signals (> 1280x960). Below this resolution, or when a DVI monitor is used, the displayed picture will be full size.

Generally this tool is intended to determine if the SSB is working or not. Thus to determine if LVDS, RGB, and sync signals are okay.

How to Connect

Connections are explained in the user manual, which is packed with the tool.

Note: To use the LVDS tool, you must have ComPair release 2004-1 (or later) on your PC (engine version >= 2.2.05). For every TV type number and screen size, one must choose the proper settings via ComPair. The ComPair file will be updated regularly with new introduced chassis information.

TO I2C SERVICE CONNECTOR

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Service Modes, Error Codes, and Fault Finding

How to Order

• LVDS tool (incl. two LVDS cables: 31p and 20p): 3122 785 90671.

• LVDS tool Service Manual: 3122 785 00810.

• LVDS cable 31p/300/31p (for full HD displays): 3122 785 90861.

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 or the error is a protection error. 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), except when the error is a protection error. 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.

Basically there are three kinds of errors:

• Errors detected by the Stand-by Processor. These errors will always lead to protection and an automatic start of the blinking LED for the concerned error (see paragraph “The Blinking LED Procedure”). In these cases SDM can be used to start up (see chapter “Stepwise Start-up”). Note that it can take up to 90 seconds before the TV goes to protection and starts blinking the error (e.g. error 53)

• Errors detected by VIPER that lead to protection. In this case the TV will go to protection and the front LED will blink at 3 Hz. Depending on the software version it is possible that further diagnosis via service modes is not possible here (see also paragraph “Error Codes” -> “Error Buffer” > “Extra Info”).

• Errors detected by VIPER that do not lead to protection. In this case the error can be read out via ComPair, via blinking LED method, or in case you have picture, via SAM.

5.5.2 How to Read the Error Buffer

Use one of the following methods:

• On screen via the SAM (only if you have a picture). E.g.: – 00 00 00 00 00: No errors detected – 06 00 00 00 00: Error code 6 is the last and only

detected error

– 09 06 00 00 00: Error code 6 was first detected and

error code 9 is the last detected error

• Via the blinking LED procedure (when you have no picture). See next paragraph.

•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”.

• With a DST, key in sequence “DIAGNOSE” - “99” - “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 you begin the repair (before clearing the buffer, write down the content, as this history can give you 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.

• Via a “not acknowledge” of an I

C communication

Take notice that some errors need more than 90 seconds before they start blinking. So in case of problems wait 2 minutes from start-up onwards, and then check if the front LED is blinking.

Table 5-3 Error code overview

Error Description Error/Prot Detected by Device Schematic Defective module Result

I2C2

I2C3

5 VIPER does not boot P Stby µP PNX8550 B7E / Protection + Error blinking

6 5V supply P Stby µP n.a. B8A / Protection + Error blinking

7 8V6 supply P Stby µP n.a. B8A / Protection + Error blinking

8 1.2V DC/DC P Stby µP n.a. B8A / Protection + Error blinking

9 2.5V DC/DC P Stby µP n.a. B8A / Protection + Error blinking

11 3.3V DC/DC P Stby µP n.a. B8A / Protection + Error blinking

12 12V supply P Stby µP n.a. B8A / Protection + Error blinking

14 Supply Class D amplifiers P Stby µP n.a. B8A / Protection + Error blinking

17 MPIF1 audio supply E VIPER PNX3000 B4D IF I/O Error logged

18 MPIF1 ref. freq. E VIPER PNX3000 B4B IF I/O Error logged

22 MPIF2 audio supply E VIPER PNX3000 B4H IF I/O Error logged

23 MPIF2 ref. freq. E VIPER PNX3000 B4F IF I/O Error logged

25 Supply fault P Stby µP n.a. B5E / Protection + Error blinking

27 Phoenix E VIPER PNX2015B B5E HD subsystem Error logged

28 MOP E VIPER XC3S B9D Output processor Error logged

29 AVIP1 E VIPER PNX2015 B5E AV input processor 1 Error logged

31 AVIP2 E VIPER PNX2015 B5E AV input processor 2 Error logged

32 MPIF1 E VIPER PNX3000 B4B Analog 1 front end 1 Error logged

33 MPIF2 E VIPER PNX3000 B4F Analog 1 front end 2 Error logged

P VIPER n.a. B7A

P Stby µP n.a. B7A / Protection + Error blinking

P VIPER n.a. B7A

I2C1_blocked

I2C2_blocked

I2C4_blocked

Protection + 3 Hz blinking

Service Modes, Error Codes, and Fault Finding

Error Description Error/Prot Detected by Device Schematic Defective module Result

34 Tuner1 E VIPER / B2 Tuner 1 Error logged

35 Tuner2 E VIPER / B3 Tuner 1 Error logged

38 I/O Expander audio E VIPER PCA9554 B14B Audio I/O Expander Error logged

43 Hi Rate Front End E VIPER TDA9975 B11B HDMI Error logged

44 Main NVM E VIPER M24C64 B8A / Error logged

45 Columbus 1 E VIPER PNX2015 B5E Comb filter Error logged

53 VIPER P Stby µP PNX8550 B7A / Protection + Error blinking

55 SPIDER E VIPER / B6A Video Featuring Error logged

EN 29JL2.1E AA 5.

Extra Info

• Error 1 (I

C bus 1 blocked). When this error occurs, the TV will go to protection and the front LED will blink at 3 Hz. Now you can partially restart the TV via the SDM short-cut pins on the SSB. Depending on the software version it is possible that this mechanism does not work. Update the main software to have the latest status.

• Error 2 (I

C bus 2 blocked). When this error occurs, the TV will go to protection and the front LED will blink at 3 Hz. Now you can partially restart the TV via the SDM short-cut pins on the SSB. Due to hardware restriction (I the fast I

C bus) it will be impossible to start up the VIPER

C bus 2 is

and therefore it is also impossible to read out the error codes via ComPair or via the blinking LED method. With the knowledge that only errors 1, 2 and 4 result in a 3 Hz blinking LED, the range of possible defects is limited. When you have restarted the TV via the SDM short-cut pins, and then pressed "CH+" on your remote control, the TV will go to protection again, and the front LED blink at 3 Hz again. This could be an indication that the problem is related to error 2.

• Error 3 (I on I

C bus 3 blocked). There are only three devices

C bus 3: VIPER, Stand-by Processor, and NVM. The Stand-by Processor is the detection device of this error, so this error will only occur if the VIPER or the NVM is blocking the bus. This error will also be logged when the NVM gives no acknowledge on the I

C bus (see error 44). Note that if the 12 V supply is missing (connector 1M46 on the SSB), the DC/DC supply on the SSB will not work. Therefore the VIPER will not get supplies and could block I a missing 12 V can also lead to an error 3.

• Error 4 (I

C bus 4 blocked). Same remark as with error 1.

C bus 3. So,

• Error 5 (VIPER does not boot). This error will point to a severe hardware problem around the VIPER (supplies not OK, VIPER completely dead, I

C link between VIPER and

Stand-by Processor broken, etc...).

• Error 12 (12 V error). Except a physical problem with the 12 V itself, it is also possible that there is something wrong with the Audio DC Protection: see paragraph "Hardware Protections" for this.

• Error 14 (Audio supply). The detection is done on the audio board itself. Here, the absence of one of the audio supplies is sensed, and will lead to protection and error 14 blinked. For LCD sets this circuit can be found on schematic SA3, for PDP sets this can be found on schematic C.

• Error 17 (MPIF 1 audio supply). This error indicates that the 8V-AUD is missing on pin 98 of the MPIF. The result of this missing supply will be that there is no sound on external sources (you will have sound from tuner).

• Error 22 (MPIF 2 audio supply). Same remark as for error

17.

• Error 27 (PNX2015 HD subsystem part error). Depending on the software version it is possible that the detection mechanism of this error does not function.

• Error 28 (MOP/EPLD error). Due to the detection mechanism of the MOP error it is possible that the actual logging of the error can take up to 4 minutes (worst case). So if you want to be sure there is a MOP error, reset the error buffer, restart the TV and wait for 4 minutes before checking the error buffer again. The detection mechanism for this error has been changed to avoid “false” MOP errors.

• Error 29 (AVIP1). This error will probably generate extra errors. You will probably also see errors 32 (MPIF) and error 31 (AVIP 2). Error 29 and 31 will always be logged together due to the fact that both AVIPs are inside the PNX2015 and are on the same I

C bus. In this case start looking for the cause around AVIP (part of PNX2015). Depending on the software version it is possible that the detection mechanism of this error does not function.

• Error 31 (AVIP2). See info on error 29.

• Error 44 (NVM). This error will probably never occur because it is masked by error 3 (I mechanism for error 3 checks on an I

C bus 3). The detection

C acknowledge of the NVM. If NVM gives no acknowledge, the stand-by software assumes that the bus is blocked, the TV goes to protection and error 3 will be blinking.

• Error 53. This error will indicate that the VIPER has started to function (by reading his boot script, if this would have failed, error 5 would blink) but initialization was never completed because of hardware peripheral 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 takes 90 seconds before the TV goes to protection in this case.

• Error 55 (SPIDER error). Depending on the software version it is possible that the detection mechanism of this error does not function.

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Service Modes, Error Codes, and Fault Finding

5.6 The Blinking LED Procedure

5.6.1 Introduction

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

• Blinking LED procedure in case of a protection detected by the stand-by processor. In this case the error is automatically blinked. This will be only one error, namely the one that is causing the protection. Therefore, you do not have to do anything special, just read out the blinks. A long blink indicates the decimal digit, a short blink indicates the units.

• Blinking LED procedure in the “on” state. Via this procedure, you can make the contents of the error buffer visible via the front LED. This is especially useful for fault finding, when there is no picture.

When the blinking LED procedure is activated in the “on” state, the front LED will show (blink) the contents of the error-buffer. Error-codes > 10 are shown as follows:

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

2. A pause of 1.5 s,

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

4. A pause of approx. 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 9 6 0 0. After activation of the SDM, the front LED will show:

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

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

3. 9 short blinks followed by a pause of 3 s,

4. 6 short blinks followed by a pause of 3 s,

5. 1 long blink of 3 s to finish the sequence,

6. The sequence starts again.

5.6.2 How to Activate

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 paragraph “Stepwise Start-up").

5.7.2 Hardware Protections

There is one hardware protection in this chassis: “Audio DC Protection”. This protection occurs when there is a DC voltage on the speakers. In that case the main supply is switched "off", but the stand-by supply is still working. In case of LCD supplies, the 12V supply will drop. This will be detected by the stand-by processor, which will start blinking the 12 V error (error 12).

Repair Tips

• If there is an audio DC protection (DC voltage on your speakers), you will probably see error 12 blink in case of LCD TVs. To be sure there is an audio DC protection, disconnect the cable between the SSB and the Audio PWB and also the cable between the Main Supply and the Audio PWB. If the TV starts up, it is very likely that there is DC voltage on the speakers. Check, and replace if necessary, the audio amplifiers.

• It is also possible that you have an audio DC protection because of an interruption in one or both speakers (the DC voltage that is still on the circuit cannot disappear through the speakers).

Use one of the following methods:

• Activate the SDM. The blinking front LED will show the entire contents of the error buffer (this works in “normal operation” mode).

• 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 VIPER controller as detection device. Since in these cases, checking of observers, polling of ADCs, 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, +8V6, +1.2V, +2.5V and +3.3V.

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

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