philips BL2.1U, BL2.2U, BL2.3U Service Manual

Color Television Chassis

BL2.1U, BL2.2U, BL2.3U

F_15400_000.eps

200505

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 14

6. Block Diagrams, Testpoint Overview, and

Waveforms

Wiring Diagram (32”) LCD LPL 33 Wiring Diagram (37”) LCD LPL 34 Wiring Diagram (42”) LCD LPL 35 Block Diagram Supply + Standby (32”) 36 Block Diagram Supply + Standby (37”) 37 Block Diagram Supply + Standby (42”) 38 Block Diagram Video (32”) 39 Block Diagram Video (≥ 37”) 40 Block Diagram Audio (32”) 41 Block Diagram Audio (≥ 37”) 42 Block Diagram Control (32”) 43 Block Diagram Control (≥ 37”) 44 I2C overview 45 Supply Lines Overview (32”) 46 Supply Lines Overview (≥ 37”) 47

7. Circuit Diagrams and PWB Layouts Drawing PWB LCD Supply (32”): Mains Filter + Standby (A1) 48 50-51 LCD Supply (32”): Supply (A2) 49 50-51 LCD Supply (37”): Mains Filter + Standby (A1) 52 54-55 LCD Supply (37”): Supply (A2) 53 54-55 LCD Supply (42”): MF + Standby Part A (A1) 56 60-61 LCD Supply (42”): Supply Part A (A2) 57 60-61 LCD Supply (42”): MF + Standby Part B (A3) 58 60-61 LCD Supply (42”): Supply Part B (A4) 59 60-61 Ambi Light Panel (Optional) (AL) 62 63-63 SSB (B1-12) 64-102 103-112

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.

External I/O Panel: Externals A (32”) (BE1) 113 116 External I/O Panel: Externals B (32”) (BE2) 114 116 External I/O Panel: Externals C (32”) (BE3) 115 116 External I/O Panel: Externals A (≥ 37”) (BE1) 117 119 External I/O Panel: Externals B (≥ 37”) (BE2) 118 119 Side I/O Panel (≥ 37”) (D) 120 121 Control Board (32”) (Top Control) (E) 122 123 Control Board (≥ 37”) (Side Control) (E) 122 123 LED Panel (32”) (J) 124 124 LED Panel (≥ 37”) (J) 125 126 Standby/Audio Panel: Connections (SA1) 127 130-132 Standby/Audio Panel: Standby (SA2) 128 130-132 Standby/Audio Panel: Audio (SA2) 129 130-132

8. Alignments 133

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets 138 Abbreviation List 160 IC Data Sheets 163

10. Spare Parts List 177

11. Revision List 191

Published by EL 0567 TV Service Printed in the Netherlands Subject to modification EN 3122 785 15571

EN 2 BL2.1U, 2.2U, 2.3U1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Connection Overview

1.3 Chassis Overview

Notes:

• Some models in this chassis range have a different mechanical construction. The information given here is therefore model specific.

• Figures below can deviate slightly from the actual situation, 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

Resolution (HxV pixels) : 1366(*3)x768p Min. contrast ratio : 400:1 Min. light output (cd/m Max. response time (ms) : 12 Viewing angle (HxV degrees) : 176x176 Tuning system : PLL TV Color systems : ATSC, NTSC Video playback : NTSC Cable : Unscrambled digital

Tuner bands : VHF, UHF, S, Hyper Supported video formats : 640x480i-1fH

Supported computer formats : 640x480 @ 60Hz

) : 400

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

cable - QAM

: Digital cable ready -

CableCard

: 640x480p-2fH : 720x576i-1fH

(BL2.1, 2.2)

: 720x576p-2fH

(BL2.1, 2.2) : 1280x720p-3fH : 1920x1080i-2fH

: 800x600 @ 60Hz : 1024x768 @ 60Hz : 1366x768 @ 60Hz

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) : ≈ 135 (32”-BL2.3)

- Stand-by (W) : < 2

Dimensions (WxHxD in inch) : 36.7x20.0x4.7 (32”)

Weight (lbs) : 42.5 (32”)

) : 100 - 240

: ≈ 160 (32”-BL2.2) : ≈ 190 (37”) : ≈ 290 (42”)

: 43.6x24.0x3.8 (37”) : 48.8x26.8x4.1 (42”)

: 66.2 (37”) : 77.2 (42”)

1.2 Connection Overview

Note: The following connector color abbreviations are used

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

1.2.1 Side Connections

Card reader

Only for BL2.1, 2.2

Side I/O

Only for BL2.3

1.1

1.1.2 Sound

Sound systems : AV Stereo

:BTSC

Maximum power (W

1.1.3 Multimedia

Supported digital media (only for models with DMR) : Compact Flash I & II

Supported file formats : JPEG

USB input : USB1.1 (BL2.3)

) : 2 x 15

RMS

: Memory Stick : Microdrive (upto 2GB) : SD / mini SD Card : Multi Media Card : Smart Media Card

:MP3 :MP3-pro : Slideshow (.alb)

: USB2.0 (BL2.1, 2.2)

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Figure 1-1 Side I/O connections (37 and 42-inch models)

Technical Specifications, Connections, and Chassis Overview

1.2.2 Digital Media Reader with USB2.0 (only for BP2.2)

In some versions, a 6-in-1 card reader unit is available, which is connected via USB to the Small Signal Board (see also par. “Technical Specifications” -> “Multimedia”). This unit also contains two USB2.0 connectors (see figure rear connections).

1.2.3 Rear Connections (Under Side)

Figure 1-4 Rear connections (under side)

POD: CableCARD Interface

68p - See diagram B10A jk

Service Connector (UART)

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

UART

EN 3BL2.1U, 2.2U, 2.3U 1.

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Figure 1-2 Side I/O connections (32-inch models)

USB1.1 (only for BL2.3)

1234

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300904

Figure 1-3 USB (type A)

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

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

18 2

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Figure 1-5 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 - 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

Mini Jack: Audio Headphone - Out

Bk - Headphone 32 - 600 ohm / 10 mW ot

Cinch: Video CVBS - In, Audio - In

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

/ 75 ohm jq

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

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 ohm j

P / 75 ohm j

Aerial - In

- - F-type (US) Coax, 75 ohm D

EN 4 BL2.1U, 2.2U, 2.3U1.

Technical Specifications, Connections, and Chassis Overview

1.2.4 Rear Connections (Rear Side)

MONITOR OUT

S/PDIF

L R CVBS GEM

OUT

STAR

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Figure 1-6 Rear connections (rear side; 37 and 42-inch models)

DIGITAL AUDIO Cinch: S/PDIF - In

Bk - Coaxial 0.2 - 0.6 V

/ 75 ohm jq

AV1 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 ohm j

P / 75 ohm j

AV2 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 ohm j

P / 75 ohm j

AV2 Cinch: Video CVBS - In, Audio - In

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

/ 75 ohm jq

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

AV3 Cinch: Video YPbPr - In

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

/ 75 ohm jq

DIGITAL AUDIO Cinch: S/PDIF - Out

Bk - Coaxial 0.4 - 0.6 V

/ 75 ohm kq

AV1 Cinch: Video YPbPrHV- In

Gn - Video Y 1 V Bu - Video Pb 0.7 V Rd - Video Pr 0.7 V Bk - H-sync 0 - 5 V jq

/ 75 ohm jq

Bk - V-sync 0 - 5 V jq

AV1 Cinch: Video CVBS - In, Audio - In

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

/ 75 ohm jq

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

1.3 Chassis Overview

LCD SUPPLY PANEL

MONITOR OUT Cinch: Video CVBS - Out, Audio - Out

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

/ 75 ohm kq

/10 kohm kq

RMS

/ 10 kohm kq

RMS

GEMSTAR Mini Jack: Remote Control - In/Out

1 - Ground Gnd H 2 - RXD j 3-TXD k 4-IR-OUT k 5 - RXD k

STANDBY/ AUDIO

CONTROL BOARD

PA NE L

SMALL SIGNAL BOARD

Figure 1-7 CBA locations (32-inch model)

EXTERNAL I/O PANEL

LED PANEL

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Technical Specifications, Connections, and Chassis Overview

EN 5BL2.1U, 2.2U, 2.3U 1.

AMBI LIGHT PANEL

(OPTIONAL)

STANDBY/ AUDIO

PA NE L

SMALL SIGNAL BOARD

CONTROL BOARD

MULTI MEDIA CARD READER

(OPTIONAL)

& USB

Figure 1-8 CBA locations (37- and 42-inch model)

AMBI LIGHT PANEL

(OPTIONAL)

LCD SUPPLY PANEL

LED PANEL

SIDE I/O PANEL

EXTERNAL I/O PANEL

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EN 6 BL2.1U, 2.2U, 2.3U2.

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 that 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 which 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 avoid 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 color 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, it is essential when removing an (LF)BGA, 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 chance 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 shown to result in problems during re-soldering.

-9

), or pico-farads (p= x10

-12

-6

Safety Instructions, Warnings, and Notes

EN 7BL2.1U, 2.2U, 2.3U 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 neighboring 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).

E_06532_024.eps

230205

avoid mixed regimes. If not to avoid, clean carefully 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 short 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 mix of two alloys).

Caution: For BGA-ICs, you must use the correct temperatureprofile, 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.

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.

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 at least a solder-tip temperature of 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 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 rise 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

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.

EN 8 BL2.1U, 2.2U, 2.3U3.

3. Directions for Use

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

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

Directions for Use

4. Mechanical Instructions

Mechanical Instructions

EN 9BL2.1U, 2.2U, 2.3U 4.

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:

• Several models in this chassis range have a different mechanical construction, the instructions given in this chapter are therefore very model specific.

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

• Follow the disassemble instructions in described order.

Figure 4-1 Cable dressing (32- inch)

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Figure 4-2 Cable dressing (37- and 42-inch model)

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EN 10 BL2.1U, 2.2U, 2.3U4.

Mechanical Instructions

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).

• Aluminium service stands (created for Service).

4.2.1 Foam Bars

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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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4.3 Assy/Panel Removal

4.3.1 Rear Cover

Figure 4-5 Rear cover screws (37-inch model)

Warning: Disconnect the mains power cord before you remove

the rear cover.

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 display, but let the monitor lean on the speakers or the Front cover.

2. Remove all screws that secure the rear cover (see figure “Rear cover screws”); these are: – 4 x T25 torx screws (1) for securing the stand/wall

– 8 x tapping T10 torx screws (2) near the rear I/O panel; – All parker T10 torx screws (3) around the edges of the

– 6 x T10 torx screws in sunken holes (4).

3. Lift the rear cover from the cabinet cautiously. Make sure that wires and other internal components are not damaged during cover removal.

3 3 3

mount (also called “mushrooms”);

rear cover (sets with the AmbiLight feature have a somewhat different construction).

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Figure 4-4 Aluminium stands (drawing of Mk1)

The new Mk2 aluminium stands (not on drawing) with 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". The new stands are backwards compatible with the earlier models. 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!.

4.3.2 AmbiLight Inverter Panel (if present)

After removal of the rear cover, these panels are accessible.

1. Disconnect the cable(s) from the panel.

2. Remove the T10 mounting screws [1] that hold the assy.

3. Take out the panel from its bracket [2].

Figure 4-6 AmbiLight inverter panel (not for BL2.3)

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Mechanical Instructions

EN 11BL2.1U, 2.2U, 2.3U 4.

4.3.3 Keyboard Control Panel

1. Remove the panel [1] from its brackets [2].

2. Disconnect the cable [3] from the panel.

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4.3.6 Multimedia Card Reader (if present)

After removal of the rear cover, this panel is accessible.

1. Unplug the related USB cable at the top of the SSB.

2. Remove the two T10 mounting screws [1] that hold the assy.

When defective, replace the whole unit.

Figure 4-9 Multimedia card reader (not for BL2.3)

4.3.7 Stand-by Power Supply/Audio Amplifier Panel

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

2. Remove the fixation screws [2] from the panel.

3. Take the panel out of its brackets.

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Figure 4-7 Keyboard control panel

4.3.4 Speakers

After removal of the rear cover, you can access the speakers.

4.3.5 Side I/O Panel

After removal of the rear cover, this panel is accessible.

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

2. Remove the T10 mounting screw [3] that holds the assy.

3. Take out the panel from its bracket. When defective, replace the whole unit.

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Figure 4-10 Stand-by/Audio panel

4.3.8 LCD Supply Panel

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

2. Remove the fixation screws [2] from the panel.

3. Take the panel out of its brackets (it hinges on the right side).

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Figure 4-8 Side I/O panel (for all models >32-inch)

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EN 12 BL2.1U, 2.2U, 2.3U4.

Mechanical Instructions

32-inch models

37 and 42-inch models

Figure 4-11 LCD supply panel(s)

4.3.9 LED Panel

1. Disconnect the cables [1] from the panel.

2. Remove the T10 mounting screws [2] that hold the panel.

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

Figure 4-12 LED panel

4.3.10 Small Signal Board (SSB)

1. Remove all connector fixation screws [1] at the connector plate (bottom side), and at the shielding plate (rear side).

2. Remove the fixation screws [2] of the connector plate itself.

3. Remove all shielding fixing screws [3]. For easy removal of the screw that is located near the LVDS connector, release the connector first!

4. Slide the connector plate away from the SSB [4], and lift the shielding from the SSB.

5. Unplug all cables on the SSB.

6. Remove the mounting screws that hold the SSB, and lift the panel from the set.

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Figure 4-13 SSB top shielding

4.3.11 LCD Panel

To remove the LCD-panel, carry out the following steps:

1. Disconnect the cables [1] from the “L” and the “R” loudspeakers and remove the cables from their cable clamps [2], see Figure “Speaker cables and clamps”.

2. Important: Unplug the LVDS connector on the LCD panel (see Figure “LVDS connector”). Be careful, as this is a very fragile connector!

3. Unplug the connectors [1] from the Side I/O panel and from the LED panel and remove the cables from their cable clamps (see Figures “Side I/O panel” and “LED panel” at the beginning of this chapter).

4. Take the Keyboard Control panel out of its brackets and remove the Keyboard Control cable from its cable clamp (see Figure “Keyboard Control panel” at the beginning of this chapter).

5. Remove the fixation screws from the LCD panel (see Figure “LCD panel fixation screws”) There are two types of torx screws, small ones and large ones. They are indicated by the two screwdrivers.

6. Unplug the connector of the LCD panel flat cable, at the “R” speaker side of the TV set, from connector 1316 on the lower left side of the Stand-by/Audio panel (see Figure “Stand-by/Audio panel”).

7. Lift the “L” speaker side of the metal frame 10 cm from the LCD panel and hold it in this position. Now, loosen the LCD flat cable and the “L” loudspeaker cable from their clamps, and disconnect the LCD flat cable connector from the LCD panel (see Figure “LCD panel connector”).

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

Take care not to damage the fragile LVDS cable.

9. After removal of the metal frame, you can lift the LCD panel from its plastic frame (see Figure “LCD panel”).

10. If the plastic frame is damaged, replace it by a new frame, after removing the loudspeakers, the Side I/O panel, the Keyboard Control panel, and the LED panel.

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Figure 4-16 LCD panel fixation screws

EN 13BL2.1U, 2.2U, 2.3U 4.

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Figure 4-14 Speaker cables and clamps

Figure 4-15 LVDS connector

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Figure 4-17 LCD panel connector

Figure 4-18 LCD panel

4.4 Set Re-assembly

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

Notes:

• While re-assembling, make sure that all cables are placed and connected in their original position. See figure "Cable dressing".

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

EN 14 BL2.1U, 2.2U, 2.3U5.

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 almost impossible to measure waveforms with a standard oscilloscope. Therefore, waveforms are not given in this manual. 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: Color bar signal.

• Audio: 3 kHz left, 1 kHz right.

5.2 Service Modes

Service Default Mode (SDM) and Service Alignment Mode (SAM) offer several features for the service technician, while the Customer Service Mode (CSM) is used for communication between a Customer Helpdesk and a customer.

There is also the option of using ComPair, a hardware interface between a computer (see requirements below) and the TV chassis. It offers the ability of structured troubleshooting, test pattern generation, error code reading, software version readout, and software upgrading.

Minimum requirements for ComPair: a Pentium processor, Windows 95/98, and a CD-ROM drive (see also paragraph “ComPair”).

frequency to which the set will tune, would be as specified in the channel map and could be different from the one corresponding to the physical channel 3.

• All picture settings at 50% (brightness, color, 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). – Auto switch "off" (when no video signal was received

for 10 minutes). – Skip/blank of non-favorite 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 “SDM service 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

• Tuning frequency 61.25 MHz for NTSC: The TV shall tune to physical channel 3 only if channel 3 is an analog channel or if there is no channel 3 installed in the channel map. If there is a digital channel installed in channel 3, then the

Default system

Figure 5-1 SDM service pads

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

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• 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.

Contents of SAM:

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

of the VIPER software (main software) (example: BX23U-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 a picture and therefore you need the correct display option. To adapt this option, use ComPair. The correct HEX values for the options can be found in the table below.

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 BL. 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

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 functional at the moment this manual

is released, description will be published in an update manual if the function becomes available.

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 submenu.

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.

Note: As long as SAM is activated, it is not possible to change a channel. This could hamper the White Point alignments because you cannot choose your channel/frequency any more. Workaround: after you have sent the RC code “062596 INFO” you will see the service-warning screen, and in this stage it is still possible to change the channel (so before pressing the “OK” button).

EN 16 BL2.1U, 2.2U, 2.3U5.

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: BX23U-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 Signaling bit. If a Dolby transmission is received without a Dolby Signaling bit, this indicator will show “OFF” even though a Dolby transmission is received.

• Sound 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”, “SOUND MODE”. It can also have been selected automatically by signaling bits (internal software).

• Tuner Frequency. Not applicable for US sets.

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

Change via “MENU”, “TV”, “PICTURE”, “DIGITAL PROCESSING”.

• TV System. Gives information about the video system of the selected transmitter. – M: NTSC M signal received – ATSC: ATSC signal received

• Center 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”, “AV1”, “AV2”, “AV3”, “HDMI 1”, “SIDE”. Video signal quality: “VIDEO”, “SVIDEO”, “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” or “RGB 2FH 1080I”. 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. Not applicable for US sets.

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

• Lock After. Indicates at what time the channel lock is set: “OFF” or e.g. “18:45” (lock time). Change “MENU”, “TV”, “CHANNELS”, “LOCK AFTER”.

• TV Ratings Lock. Indicates the “TV ratings lock” as set by the customer. Change via “MENU”, “TV”, “CHANNELS”, “TV RATINGS LOCK”. Possible values are: “ALL”, “NONE”, “TV-Y”, “TV-Y7”, “TV-G”, “TV-PG”, “TV-14” and “TV-MA”.

• Movie Ratings Lock. Indicates the “Movie ratings lock” as set by the customer. Change via “MENU”, “TV”, “CHANNELS”, “MOVIE RATINGS LOCK”. Possible values are: “ALL”, “NR”, “G”, “PG”, “PG-13”, “R”, “NC-17” and “X”.

• V-Chip Tv Status. Indicates the setting of the V-chip as applied by the selected TV channel. Same values can be shown as for “TV RATINGS LOCK”.

• V-Chip Movie Status. Indicates the setting of the V-chip as applied by the selected TV channel. Same values can be shown as for “MOVIE RATINGS LOCK”.

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

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

• IEEE key validity. Indicates the key’s validity (n.a.).

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

• Digital Signal Quality. Indicates quality of the received digital signal (0= low).

Service Modes, Error Codes, and Fault Finding

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 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 17BL2.1U, 2.2U, 2.3U 5.

Stand-by

(Off St-by)

- POD Card remove

- Tact SW pushed

Mains

“off”

- WakeUp requested

- Acquisition needed

- No data Acquisition required and no POD present

- Tact SW pushed

- WakeUp requested

- Acquisition needed

No data Acquisition

POD

Stand-by

Off

Stand-by

required and POD present

GoToProtection

Mains

“on”

Semi

GoToProtection

WakeUp

requested

- St-by requested

- Tact SW pushed

WakeUp

requested

Protection

Active

GoToProtection

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Figure 5-2 Transition diagram

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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

CPUGO (inverse of the stby I/O line POD-MODE) and PDPGO

are then both “low” and the PDP is in the “low power” mode.

Switch “low” the NVM power reset line. Add a 2ms delay before trying to address the NVM to allow correct NVM

Switch “on” all supplies by switching LOW the POD-MODE

+5V, +8V6, +12VS, +12VSW and Vsound are switched on

- Assert the Viper reset.

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

In case of FHP PDP: Switch PDPGO “low”

initialization.

and the ON-MODE I/O lines.

Wait 50ms and then sta rt polling the detect-

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

Stand-by or

Protection

action holder: MIPS

action holder: St-by

autonomous action

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

- Switch Sound-Enable and Reset-Audio “high”.

The availa bility of the supplies is ch ecked through detect signals (delivered by

+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 observers is

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

not be entered.

They are “low” in the standby mode if the

standby mode lasted longer than 2s.

Switching the POD- MODE and the

Switching the POD-MODE low in an FHP PDP set makes the CPUGO go “high” and starts the PDP CPU.

except in an FHP PDP Cold Boot

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

order to minimize start up time.

“on” mode “low” in an SDI PDP s et makes the PDP supplies go to the “on” mode. Within 4 seconds, a

valid LVDS must be sent to the display to prev ent protection. (valid for V3 version)

Switching the PDPGO “high” will give a visual arte fact and should only be done if really necessary.

detect-5V

received within

2900 ms after POD-MODE

toggle?

Yes

activate +5V supply detection algorithm

detect-12VSW received within

2900 ms after POD-mode

toggle?

Yes

activate +12VSW supply

detection algorithm

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

PDP should start: 5V, 8V6 and

Yes

FHP PDP Set?

Yes

Switch PDPGO hig h:

12V are activated

detect-5V

received within

2900 ms after PDPGO

toggle?

+12V error

detect-8V6 received

within 6300 ms after POD-mode toggle?

Startup shall not wait for this detection

and continue startup.

+5V error

Yes

Enable the +1V2 supply (ENABLE-1V2)

Start polling the detect-1V2 every 40ms

To part B To part B

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

+8V6 erro r

activate +8V6 supply

detection algorithm

return

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From part A

From part B

detect-1V2

received within

250ms?

Yes

Enable the supply for

+2.5V and +3.3V (ENABLE-3V3)

Start polling the detect-3V3 every 40ms

detect-3V3

received within

250 ms?

Yes

Activate supply detection algorithms for

+1V2 and +3V3

SUPPLY-FAULT I/O line

is High?

Yes

Enable the supply fault detection

interrup t

action holder: MIPS

action holder: St-by

autonomous action

+1.2V error

No separate enable and detect is present for the +2V5 supply in the Baby Jaguar.

+3.3V errorNo

Supply fault errorNo

Release viper reset

Feed warm boot script(2)

Set I²C slave address

of Standby µP to (A0h)

Detect EJTAG debug probe

(pulling pin of the probe interface to

ground by inserting EJTAG probe)

EJTAG pro be

connected ?

Cold boot?

Yes

Release viper reset

Feed cold boot script(1)

Release PNX2015 reset 100ms after

Viper reset is released

Bootscript ready

in 1250 ms?

Yes

Set I²C slave address

of Standby µP to (64h)

RPC start (comm. protocol)

Yes

Release viper reset

Feed initializing boot script (3)

disable alive mechanism

Release PNX2015 reset 100ms

after Viper reset is released

Flash to RAM image

transfer succeeded

within 30s?

Yes

Viper SW initialization

succeeded within 20s?

Code = 5

Switch Viper in reset

Code = 53

To part C To part C To part C To part C

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

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EN 20 BL2.1U, 2.2U, 2.3U5.

Service Modes, Error Codes, and Fault Finding

From part B From part B From part B

Yes

Enable Alive check mechanism

MIPS reads the wake up reason

from standby µP.

SDI PDP

Set?

FHP PDP

Set?

Switch “on” the LVDS output of

the PNX2015 with a correct

clock frequency within 4s after

Yes

switching the POD and “on”

mode to prevent PDP display

supply protection.

These LVDS items are

SDI V3 displ ay only ! !

Yes

Send ST BYEN = 1

to PDP displ ay (I²C)

PFCON = 1

VCCON = 1

Wait until Viper starts to

communicate

3-th try?

Yes

Log Code as

error code

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 POD- MODE a nd ON-MODE

I/O line “high”.

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

it does not come, the standby µP will enter a

protection mode, this is not a dead end here)

PWR-OK-PDP

received within 10s

after POD and “on” mode

toggle ?

Yes

Init SDI PDP

Switch LVDS back off if

end state is not the active

state.

Switch PDPGO “ low”

action holder: MIPS

action holder: St-by

autonomous action

Log display

error and enter

protection mode

Start 4 seconds preheating timer in case of

a LPL scanning backlight LCD set.

AVIP needs to be started before the MPIF 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.

Initialize PNX2015 HD subsystem

MPIFs should be initialized 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)

All observers present with correct state?

Yes

Initialize tuners and HDMI

Initialize source select ion

Initialize video processing ICs

- Spider (if available)

Init FHP PDP

Log appropriate Observer error

Initialize Columbus

Initialize 3D Combfilt er

Initialize AutoTV

Do not enter semi-standby state in case of an LPL scanning backlight LCD set before 4 s preheating timer has elapsed.

Semi-Stand-by

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

F_15400_096c.eps

260505

Service Modes, Error Codes, and Fault Finding

EN 21BL2.1U, 2.2U, 2.3U 5.

action holder: MIPS

action holder: St-by

autonomous action

32" / 37" / 42" LCD LPL

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

Initialize audio and video processing ICs and

functions according needed use case.

Wait until QVCP generates a valid LVDS output

clock.

Switch “on” 12V LCD supply

(LCD-Power-on)

Start to apply valid interface signals to the module (LVDS) within a time

frame of min. 17.5ms to max. 67.5ms after supply switch “on”.

In implementation, use 25ms, this makes it compatible with 37HD"Sharp

(t=17.5ms is the supply switch-on delay taken into account)

Wait 250ms (min. = 200ms)

Switch “off” RGB blanking

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

to the requested output is delivered by the Viper

Switch Audio-Reset and sound enable “low” and demute

Active

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

F_15570_011.,eps

210605

EN 22 BL2.1U, 2.2U, 2.3U5.

Service Modes, Error Codes, and Fault Finding

32" / 37" / 42" LCD LPL

action holder: MIPS

Active

Mute all sound outputs.

Switch reset-audio and sound-enable

lines “high”.

Switch “off” LCD lamp.

Mute all video outputs.

Wait 250ms (min. = 200ms).

action holder: St-by

autonomous action

Switch “off” LVDS signal

(Viper I/O: PD-LVDS).

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

0.5 ms to max. 50ms after LVDS switch “off”. (Viper I/O: LCD_PWR_ON).

Semi Standby

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

F_15570_012.eps

210605

Service Modes, Error Codes, and Fault Finding

EN 23BL2.1U, 2.2U, 2.3U 5.

POD

Transfer Wake up reasons to the

Stand- by 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 Stand-by mode can be entered.

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

are kept in the hibernating DDR-RAM.

Wait 5ms

Semi Stand-by

action holder: MIPS

action holder: St-by

autonomous action

Important remark:

release RESET AUDIO and

SOUND_ENABLE 2 sec after entering stand-by to save power

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 POD-

MODE and the ON-MODE I/O lines.

For PDP this means CPUGO becomes low.

Stand-by

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

F_15400_099.eps

260505

EN 24 BL2.1U, 2.2U, 2.3U5.

Service Modes, Error Codes, and Fault Finding

action holder: MIPS

action holder: St-by

autonomous action

Power-down HDMI and 1394 hardware by keeping

Set Viper HW blocks (TM1, TM2, MBS, VMSP1 and

Semi Stand-by

This state transition is entered when stand-by is

requested and an authenticated POD is present.

Reboot

POWERDOWN-1394-GPIO- 0 line “high”.

VMSP2) to powerdown mode.

Hibernate the PNX2015 memory and keep the

PNX2015 in reset state

Disable +8V6 supply detection algorithm

Disable audio protection algorithm

Switch “off” all supplies which are not needed in POD

standby by switching “high” the ON-MODE I/O line.

POD Stand-by

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

F_15400_100.eps

260505

Service Modes, Error Codes, and Fault Finding

POD stand by

EN 25BL2.1U, 2.2U, 2.3U 5.

action holder: MIPS

action holder: St-by

autonomous action

Switch “on” all supplies by switching “low”

the ON-MODE I/O line.

Full SSB power and the display related supplies

become available

+8V6

detected within

200 ms after ON-MODE

toggle?

Yes

activate +8V6 supply

detection algorithm

Wait 2000ms to allow main supply to

deliver full power.

Enable audio protection algorithm

SDI PDP

Set?

Yes

These LVDS items are

SDI V3 display only !!

Switch “on” the LVDS output

the PNX2015 with a correct

clock frequency within 4s after

switching the POD and ON-

mode to prevent PDP display

supply protection.

+8V6 error

PWR-OK-PDP

received within 5s after

POD and ONmode

toggle ?

Yes

Init SDI PDP

Switch LVDS back “off” if end

state is not the active state.

Log display error

and enter

protection mode

Power-up HDMI and 1394 hardware by putting

POWERDOWN-1394 GPIO 0 line “low”.

Enable Viper HW blocks (TM1, TM2, MBS, VMSP1 and

VMSP2) which were in powerdown mode.

Release PNX2015 reset

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

initialize PNX2015 HD subsystem

Initialize MPIFs 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)

All observers present with correct state?

Yes

Initialize tuners and Hirate

Initialize source selection

appropriate Observer error

Initialize video processing ICs

- Spider (if available)

Initialize Columbus Initialize 3D Combfilter Initialize AutoTV

Semi-Stand-by

Figure 5-10 “POD Stand-by” to “Semi Stand-by” flowchart

F_15400_101.eps

120505

EN 26 BL2.1U, 2.2U, 2.3U5.

Service Modes, Error Codes, and Fault Finding

action holder: MIPS

action holder: St-by

autonomous action

If needed to speed up this transition,

this block could be omitted. This is

depending on the outcome of the

safety investigations.

min. 0.5ms to max. 50ms after LVDS switch “off”. (for LCD sets)

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 (for LCD sets)

Wait 250ms (min. = 200ms)

Switch “off” LVDS signal

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

Ask stand-by µP to enter protection state

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 POD-

MODE and the ON-MODE I/O lines.

Flash LED in order to indicate

protection state*.

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

Protection

discussion.

F_15400_102.eps

120505

Figure 5-11 “Protection” flowchart

Service Modes, Error Codes, and Fault Finding

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.

C/UART bus of the television.

C/UART commands to

C level) and

C commands

C/UART level.

UART SERVICE

CONNECTOR

PC VCR I2CPo wer

9V DC

E_06532_021.eps

Figure 5-12 ComPair interface connection

How To Order

ComPair order codes:

• ComPair Software: ST4191.

• ComPair Interface Box: 4822 727 21631.

• AC Adapter: T405-ND.

• ComPair Quick Start Guide: ST4190.

• 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. Furthermore it is possible to program EPLDs with this tool (Byte blaster). Read the user manual for an explanation of this feature.

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.

EN 27BL2.1U, 2.2U, 2.3U 5.

TO I2C SERVICE CONNECTOR

180804

How To Connect

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

Caution: It is compulsory to connect the TV to the PC as shown in the picture below (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!

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.

How to Order

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

• LVDS tool Service Manual: 3122 785 00810.

EN 28 BL2.1U, 2.2U, 2.3U5.

Service Modes, Error Codes, and Fault Finding

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 has occurred, the error 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 50+ operation hours. 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”).

• 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. 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”.

• 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 Defective module Result

I2C1

I2C2

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

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

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

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

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

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

14 Supply Class D amplifiers P Stby µP / Protection + Error blinking

14 Supply Audio part SSB P Stby µP / Protection + Error blinking

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

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

25 Supply fault P Stby µP / Protection + Error blinking

27 Phoenix E VIPER PNX2015B HD subsystem Error logged

28 MOP E VIPER XC3S Output processor Error logged

29 AVIP1 E VIPER PNX2015 AV input processor 1 Error logged

31 AVIP2 E VIPER PNX2015 AV input processor 2 Error logged

32 MPIF1 E VIPER PNX3000 / Error logged

34 Tuner1 E VIPER / Tuner 1 Error logged

37 Channel decoder E VIPER NXT2003 / Error logged

39 POD Interface E VIPER STV701 / Error logged

43 Hi Rate Front End E VIPER TDA9975 HDMI Error logged

44 Main NVM E VIPER M24C64 / Error logged

45 Columbus 1 E VIPER PNX2015 Comb filter Error logged

53 VIPER P Stby µP PNX8550 / Protection + Error blinking

63 PDP Display (n.a.) P VIPER / Display Protection + 3 Hz blinking

P VIPER n.a.

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

P VIPER n.a.

I2C1_blocked

I2C2_blocked

I2C4_blocked

Protection + 3 Hz blinking

Service Modes, Error Codes, and Fault Finding

EN 29BL2.1U, 2.2U, 2.3U 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 shortcut pins on the SSB. Depending on the software version it is possible that no further diagnose (error code read-out) is possible. With the knowledge that only errors 1, 2, 4, and 63 result in a 3 Hz blinking LED, the range of possible defects is limited.

• 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 shortcut 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, 4, and 63 result in a 3 Hz blinking LED, the range of possible defects is limited. When you have restarted the TV via the SDM shortcut 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

• Error 5 (I severe hardware problem around the VIPER (supplies not OK, VIPER completely dead, I

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

C bus 5 blocked). This error will point to a

C link between VIPER and

C bus 3. So,

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

• Error 7 (8.6 V error). Except a physical problem with the

8.6 V itself, it is also possible that there is something wrong with the Audio DC Protection: see paragraph "Hardware Protections" for this.

• 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). This error combines two fault conditions: – First detection is done on the “on-board” audio supplies

(SSB). The current through resistor 3A95 (schematic B3E) is measured. An over-current will lead to protection and error 14 blinking.

– The second detection is done on the audio board itself.

Here, the absence of one of the audio supplies is sensed, and will also 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 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 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).

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

• Error 34 (Tuner 1). When this error is logged, it is not sure that there is something wrong with the tuner itself. It is also possible that there is something wrong with the communication between channel decoder and tuner. See schematic B2B.

• Error 37 (Channel decoder). This error will always log error 34 (tuner) extra. This is due to the fact that the tuner

C bus is coming from the channel decoder.

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

C bus 3). The detection mechanism

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).

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

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.

EN 30 BL2.1U, 2.2U, 2.3U5.

Service Modes, Error Codes, and Fault Finding

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 anymore.

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.

Protections during Start-up

During TV start-up, some voltages and IC observers are actively monitored to be able to optimize 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. For the Samsung V4 PDP displays, the 8V6 supply is switched "off" and the LED on the display’s Main Supply blinks eleven times, which means there is an overvoltage protection. The front LED of the TV will blink error 7 (8V6 error). 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, and error 7 for TVs with SDI displays. 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).

5.8 Fault Finding and Repair Tips

Read also paragraph "Error Codes" - "Extra Info".

5.8.1 Exit “Factory Mode”

When an "F" is displayed in the screen's right corner, this means that the set is in "Factory" mode, and it normally happens after a new SSB has been mounted. To exit this mode, push the "VOLUME minus" button on the TV's keyboard control for 5 seconds and restart the set

5.8.2 MPIF

Important things to make the MPIF work:

• Supply.

• Clock signal from the AVIP.

•I

C from the VIPER.

5.8.3 AVIP

Important things to make the AVIP work:

• Supplies.

• Clock signal from the VIPER.

•I

C from the VIPER (error 29 and 31).

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/AC Power cord, presuming that the Stand-by Processor is operational.

• If the input voltage of the DC/DC converters is around 12 V (measured on the decoupling capacitors 2U17/2U25/ 2U45) and the ENABLE signals are "low" (active), then the output voltages should have their normal values.

• First, the Stand-by Processor activates the +1V2 supply (via ENABLE-1V2).

• Then, after this voltage becomes present and is detected OK (about 100 ms), the other two voltages (+2V5 and +3V3) will be activated (via ENABLE-3V3).

• The current consumption of controller IC 7U00 is around 20 mA (that means around 200 mV drop voltage across resistor 3U22).

• The current capability of DC/DC converters is quite high (short-circuit current is 7 to 10 A), therefore if there is a linear integrated stabilizer that, for example delivers 1.8V from +3V3 with its output overloaded, the +3V3 stays usually at its normal value even though the consumption from +3V3 increases significantly.

• The +2V5 supply voltage is obtained via a linear stabilizer made with discrete components that can deliver a lot of current. Therefore, in case +2V5 (or +2V5D) is shortcircuited to GND, the +3V3 will not have the normal value but much less. The +2V5D voltage is available in standby mode via a low power linear stabilizer that can deliver up to 30 mA. In normal operation mode, the value of this supply voltage will be close to +2V5 (20 - 30 mV difference).

• The supply voltages +5V and +8V6 are available on connector 1M46; they are not protected by fuses. +12VSW is protected for over-currents by fuse 1U04.

Fault Finding

• Symptom: +1V2, +2V5, and +3V3 not present (even for a short while ~10ms).

1. Check 12V availability (fuse 1U01, resistor 3U22,

power MOS-FETs) and enable signal ENABLE-1V2 (active low).

2. Check the voltage on pin 9 (1.5 V).

3. Check for +1V2 output voltage short-circuit to GND that

can generate pulsed over-currents 7-10 A through coil 5U03.

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