Philips 37PF9631D-37 Schematic

Color Television Chassis

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Contents Page Contents Page

1. Technical Specifications, Connections, and Chassis Overview 2

2. Safety Instructions, Warnings, and Notes 5

3. Directions for Use 7

4. Mechanical Instructions 8

5. Service Modes, Error Codes, and Fault Finding 13

6. Block Diagrams, Test Point Overviews, and

Waveforms

Wiring Diagram 31 Block Diagram Supply 32 Block Diagram Video 33 Block Diagram Audio 34 Block Diagram Control & Clock Signals 35 I2C IC’s Overview 36 Supply Lines Overview 37

7. Circuit Diagrams and PWB Layouts Diagram PWB LCD Supply (37”): Mains Filter + Standby (A1) 38 40-45 LCD Supply (37”): Supply (A2) 39 40-45 Ambi Light (Part 1) (AL1) 46 49 Ambi Light (Part 2) (AL2) 47 49 Ambi Light (Part 3) (AL3) 48 49 SSB: DC / DC (B1A) 50 81-86 SSB: Supply + RS232 (B1B) 51 81-86 SSB: Channel Decoder (B2A) 52 81-86 SSB: Main Tuner (B2B) 53 81-86 SSB: MPIF Main: Video Source Selection (B3A) 54 81-86 SSB: MPIF Main: Supply (B3B) 55 81-86 SSB: MPIF Main: IF & SAW Filter (B3C) 56 81-86 SSB: MPIF Main: Audio Source Selection (B3D) 57 81-86 SSB: MPIF Main: Audio Amplifier (B3E) 58 81-86 SSB: PNX2015: Audio / Video (B4A) 59 81-86 SSB: PNX2015: DV I/O Interface (B4B) 60 81-86 SSB: PNX2015: Tunnelbus (B4C) 61 81-86 SSB: PNX2015: DDR Interface (B4D) 62 81-86

Copyright 2006 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: PNX2015: Standby & Control (B4E) 63 81-86 SSB: PNX2015: Supply (B4F) 64 81-86 SSB: PNX2015: Display Interface (B4G) 65 81-86 SSB: Viper: Control (B5A) 66 81-86 SSB: Viper: Main Memory (B5B) 67 81-86 SSB: Viper: A/V + Tunnelbus (B5C) 68 81-86 SSB: Viper: Supply (B5D) 69 81-86 SSB: Viper: EEPROM (B5E) 70 81-86 SSB: Miscellaneous (B5F) 71 81-86 SSB: Video DAC (B6) 72 81-86 SSB: HDMI: Supply (B7A) 73 81-86 SSB: HDMI: I/O + Control (B7B) 74 81-86 SSB: Analog I/O (B7C) 75 81-86 SSB: UART (B7D) 76 81-86 SSB: Audio: Amplifier (B8A) 77 81-86 SSB: Audio: Connectors (B8B) 78 81-86 SSB: SRP List Part 1 79 81-86 SSB: SRP List Part 2 80 81-86 Side I/O Panel (D) 87 88 Control Panel (E) 89 90 Front IR / LED Panel (J) 91 91 Standby & Audio Panel: Connections (SA1) 92 95-97 Standby & Audio Panel: Standby (SA2) 93 95-97 Standby & Audio Panel: Audio (SA3) 94 95-97

8. Alignments 99

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets 105 Abbreviation List 111 IC Data Sheets 114

10. Spare Parts List 124

11. Revision List 133

Published by EL 0665 BG CD Customer Service Printed in the Netherlands Subject to modification EN 3122 785 15940

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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 : 37” (94 cm), 16:9 Resolution (HxV pixels) : 1366(*3)x768p Min. light output (cd/m Max. response time (ms) : 6 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

) : 500

: 640x480p-2fH : 1280x720p-3fH : 1920x1080i-2fH

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

cable - QAM

:BTSC

Maximum power (W

1.1.3 Multimedia

Supported file formats : JPEG

USB input : USB1.1

1.1.4 Miscellaneous

Power supply:

- Mains voltage (V

- Mains frequency (Hz) : 60

Ambient conditions:

- Temperature range (°C) : +5 to +40

- Maximum humidity : 90% R.H.

Power consumption (values are indicative)

- Normal operation (W) : ≈ 175

- Stand-by (W) : 0.45

Dimensions (WxHxD in inch) : 38.9x27.8x4.5

Weight, stand included (kg/lbs) : 26/57

):2 x 8

RMS

) : 110 - 120

: Dolby Digital (AC3)

:MP3 : Slideshow (.alb)

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.

1.1.2 Sound

Sound systems : AV Stereo

Figure 1-1 I/O connection overview

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Technical Specifications, Connections, and Chassis Overview

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1.2.1 Side Connections

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

USB1.1

1234

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Figure 1-2 USB (type A)

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

1.2.2 Rear Connections

HDMI 1: Digital Video, Digital Audio - In

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Figure 1-3 HDMI (type A) connector

1 - D2+ Data channel j 2-Shield Gnd H 3 - D2- Data channel j 4 - D1+ Data channel j 5-Shield Gnd H 6 - D1- Data channel j 7 - D0+ Data channel j 8-Shield Gnd H 9 - D0- Data channel j 10 - CLK+ Data channel j 11 - Shield Gnd H 12 - CLK- Data channel j 13 - 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

Aerial - In

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

AV3 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

Ye - Video CVBS 1 V

AV1 Cinch: Audio - In

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

/ 75 ohm jq

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

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1.3 Chassis Overview

STANDBY &

AUDIO PANEL

Technical Specifications, Connections, and Chassis Overview

SMALL SIGNAL

BOARD

CONTROL

BOARD

Figure 1-4 PWB/CBA locations

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LCD SUPPLY

PA NE L

SIDE I/O

PA NE L

IR / LED

PA NE L

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

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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 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, 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

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Safety Instructions, Warnings, and Notes

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 “Repair downloads”. 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).

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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 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 "Repair downloads". 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 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

2.3.5 Alternative BOM identification

In September 2003, Philips CE introduced a change in the way the serial number (or production number, see Figure 2-1) is composed. From this date on, the third digit in the serial number (example: AG2B0335000001) indicates the number of the alternative BOM (Bill of Materials used for producing the specific model of TV set). It is possible that the same TV model on the market is produced with e.g. two different types of displays, coming from two different O.E.M.s. By looking at the third digit of the serial number, the service technician can see if there is more than one type of B.O.M. used in the production of the TV set he is working with. He can then consult the At Your Service Web site, where he can type in the Commercial Type Version Number of the TV set (e.g. 28PW9515/12), after which a screen will appear that gives information about the number of alternative B.O.M.s used. If the third digit of the serial number contains the number 1 (example: AG1B033500001), then there is only one B.O.M. version of the TV set on the market. If the third digit is a 2 (example: AG2B0335000001), then there are two different B.O.M.s. Information about this is important for ordering

the correct spare parts!

For the third digit, the numbers 1...9 and the characters A...Z can be used, so in total: 9 plus 26 = 35 different B.O.M.s can be indicated by the third digit of the serial number.

2.3.6 Practical Service Precautions

• It makes sense to avoid exposure to electrical shock. While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

• Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

3. Directions for Use

You can download this information from the following websites:

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

Directions for Use

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Mechanical Instructions

4. Mechanical Instructions

Index of this chapter:

4.1 Cable Dressing

4.2 Service Positions

4.3 Assy/Panel Removal

4.4 Set Re-assembly

4.1 Cable Dressing

Notes:

• 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.

4.2 Service Positions

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

• Foam bars (created for Service).

• Aluminium service stands (created for Service).

4.2.1 Foam Bars

Figure 4-2 Foam bars

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Figure 4-1 Cable dressing

4.2.2 Aluminium Stands

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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.

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Figure 4-3 Aluminium stands (drawing of MkI)

The new MkII 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 Assy/Panel Removal

4.3.1 Rear Cover

Figure 4-4 Rear cover lid removal

Mechanical Instructions

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Figure 4-6 Rear cover removal

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 the screws [1] that hold the rear cover lids and remove the lids [2]. See figure “Rear cover lid removal” for details.

3. Disconnect the connectors [3] behind the lids. See figure “AmbiLight connector removal” for details.

4. Remove the mushrooms [4]. See figure “Rear cover removal” for details.

5. Remove screws [5].

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

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Figure 4-5 AmbiLight connector removal

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4.3.2 Keyboard Control Panel

1. Remove the screws [1] that secure the panel. See figure “Keyboard Control panel” for details.

2. Slide the bracket to the right.

3. Release clips [2].

4. Remove the panel.

5. Unplug connector [3].

When defective, replace the whole unit.

Figure 4-7 Keyboard Control panel (1)

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Mechanical Instructions

Caution: never disconnect the speakers with a playing set, because otherwise the class-D audio amplifiers could be damaged!

4.3.6 Stand-by Power Supply/Audio Amplifier Panel

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

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

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

Figure 4-8 Keyboard Control panel (2)

4.3.3 Side I/O Panel

6. Unplug connectors [1].

7. Remove screws [2]. See figure “Side I/O and LED Panel removal” for details.

When defective, replace the whole unit.

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Figure 4-10 Stand-by/Audio panel

4.3.7 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 4-9 Side I/O and LED Panel removal

4.3.4 LED Panel

1. Release clip [3].

2. Remove the panel.

3. Unplug connector [4]. When defective, replace the whole unit.

4.3.5 Speakers

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

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Figure 4-11 LCD supply panel

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4.3.8 Small Signal Board (SSB)

s 6

REAR COVER

LEFT

RIGHT

1 1 1

Mechanical Instructions

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Figure 4-12 SSB bottom shielding

1. Remove the connector fixation screws [1] at the connector plate (bottom side, see Figure “SSB bottom shielding”).

2. Unplug the LVDS connector [1] on the SSB (SSB top side, see Figure “SSB top view”). Be careful as it is very fragile.

3. Unplug all other cables on the SSB.

4. Remove the mounting screws [2] that hold the SSB, and lift the panel from the set.

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Figure 4-15 Left AmbiLight panel removal

1. Unplug connectors [1].

2. Remove screws [2].

3. Remove panel.

Right AmbiLight Panel Removal

See figure “Right AmbiLight panel removal” for details.

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4.3.9 AmbiLight Inverter Panel

The AmbiLight inverter panels are placed on the inside of the rear cover. See figure “AmbiLight inverter panels” for details.

LEFT

Figure 4-14 AmbiLight inverter panels

Left AmbiLight Panel Removal

See figure “Left AmbiLight panel removal” for details.

Figure 4-13 SSB top view

REAR COVER

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RIGHT

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Figure 4-16 Right AmbiLight panel removal

1. Unplug connectors [1].

2. Remove screws [2].

3. Remove panel.

4.3.10 LCD Panel

See figure “LCD panel removal” for details.

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Mechanical Instructions

Figure 4-17 LCD panel removal

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

1. Remove screws [1].

2. Remove brackets [2].

3. Important: Unplug the LVDS connector [3] on the LCD panel. Be careful, as this is a very fragile connector!

4. Unplug all other connectors [3].

5. Remove screws [4].

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

Take care not to damage the fragile LVDS cable.

7. After removal of the metal frame, you can lift the LCD panel from the front cabinet.

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".

• Ensure that the conducting tape [1] at both sides of the LCD panel is placed in its original position. See Figure “Conducting tape”.

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

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Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Stepwise Start-up

5.4 Service Tools

5.5 Error Codes

5.6 The Blinking LED Procedure

5.7 Protections

5.8 Fault Finding and Repair Tips

5.9 Software Upgrading

5.1 Test Points

As most signals are digital, it will be 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”).

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 and SPI service pads”.

SDMSPI

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 frequency to which the set will tune, would be as specified

Default system

Figure 5-1 SDM and SDI 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.

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EN 14 EJ2.0U LA5.

Service Modes, Error Codes, and Fault Finding

• 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.

Contents of SAM:

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

of the VIPER software (main software) (example: EJ20U-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.W.Z is the sub version number (a higher number is always compatible with a lower number).

• 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. See also paragraph 8.

• Dealer Options. Extra features for the dealers.

• Options. Extra features for Service. See also paragraph 8.

• Initialize 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. Changing the display option code 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 accepted. After the display option is changed in the NVM, the TV will go to the Stand-by mode. If the NVM was corrupted or empty before this action, it will be initialized first (loaded with the default values). This initializing can take up to 20 seconds. When you have keyed in the wrong display option code, it is possible that the TV will not start up properly. In some cases the TV will go to standby again. In this case you need to reprogram the NVM via ComPair.

Table 5-2 Display option code overview (all FTV chassis)

Display Op-

tion (Dec.)

000 PDP SDI V3 42” 768p 1024

001 PDP SDI V3 50” 768p 1366

002 PDP FHP A1 42” 1024i 1024

003 LCD LPL A3 30” 768p 1280

004 LCD LPL A6 37” 768p 1366

005 LCD LPL A6 42” 768p 1366

006 LCD Sharp 32” 768p 1366

007 PDP SDI V3 42” 480p 852

008 PDP FHP A1 37” 1024i 1024

009 LCOS XION - - 720p 1280

010 LCD AUO 30” 768p 1280

011 LCD LPL A6 32” 768p 1366

012 LCD AUO V0.1 32” 768p 1366

013 LCD Sharp 37” 768p 1366

014 LCD LPL SL01 42” 1080p 1920

015 PDP SDI 37” 480p 852

016 PDP FHP 37” 1080i 1024

017 PDP FHP 42” 1080i 1024

018 PDP FHP 55” 768p 1366

019 LCOS VENUS - - 720p 1280

020 LCOS VENUS - - 1080p 1920

021 LCD LPL SL01 26” 768p 1366

022 LCD LPL SL01 32” 768p 1366

023 PDP LG 42” 480p 852

024 PDP SDI V4 42” 480p 852

025 PDP SDI V5 42” 768p 1024

026 PDP FHP A2 42” 1024i 1024

027 PDP SDI V5 50” 768p 1366

028 LCD Sharp 37” 1080p 1920

029 LCD AUO V0.1 32” 768p 1366

030 LCD Sharp 37” 1080p 1920

031 LCD Sharp 37” 1080p 1920

032 LCD LPL SL0.1 20” 768p 1366

033 LCD QDI 23” 768p 1366

034 ECO PTV - 52” 1080i 1366

035 ECO PTV - 55” 1080i 1366

036 ECO PTV - 61” 1080i 1366

037 PDP FHP A3 42” 1024i 1024

038 DLP - 50” 720p 1280

039 DLP - 60” 720p 1280

040 LCD Sharp 2.3 32” 768p 1366

041 LCD LPL SLA1 42” 768p 1366

042 PDP SDI V4 63” 768p 1366

043 LCD Sharp 3.0 37” 768p 1366

044 LCD Sharp 2.3 37” 768p 1366

045 LCD LPL SLB2 26” 768p 1366

046 LCD LPL SL06 32” 768p 1366

Technology Display

Make &

Type

Size Vertical

Resolution

Horizontal

Resolution

Service Modes, Error Codes, and Fault Finding

EN 15EJ2.0U LA 5.

Display Op-

tion (Dec.)

047 LCD LPL SLB1 42” 768p 1366

048 LCD QDI 26” 768p 1366

049 LCD AUO 26” 768p 1366

050 LCD AUO V9 32” 768p 1366

051 LCD AUO 37” 768p 1366

052 LCD AUO V5 32” 768p 1366

053 LCD LPL SL04 37” 768p 1366

Technology Display

Make &

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.

• Operation hours PDP. Displays the accumulated total of PDP operation hours. For the LCD chassis this is not applicable. Here you are able to reset the operation hours of the plasma display. This has to be done in case of replacement of the display.

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).

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.

Horizontal

Resolution

Contents of CSM

• SW Version (example: EJ20U-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).

• 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. The noise figure is not applicable for digital channels.

• 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

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Service Modes, Error Codes, and Fault Finding

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. Due to the ATSC architectural setup, this item does not give useful information anymore.

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

• IEEE key validity. Not applicable.

• POD key validity. Not applicable.

• Digital Signal Quality. This item does not work correct, so it gives no useful information.

How to Exit CSM

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

5.2.4 Service Mode of Converter Boards for Ambi Light

Purpose

To switch on the lamps manually in case I

C-bus triggering

fails.

The Service Mode can be activated by disconnecting connector 1M49 and then by shorting for a moment the two solder pads [1] on the Ambi Light Inverter Panel. See figure “Service Mode pads”.

G_15950_049.eps

Figure 5-2 Service Mode pads AmbiLight panel

In this chassis, single fitted boards are used. It drives 1 lamp unit (3 lamps) per board.

The double fitted boards (which are used in other sets) are supplied by +12Va and +12Vb. The microprocessor is supplied by +12Va. Therefore, if only +12Va is available, lamp unit B will not work. See figure “Building blocks of Converter Board” for details.

+12Va

Stab.

Board select

+5V

Inverters

Processor

PWM out

+12Va

I²C

Protection

+12Vb (12

Figure 5-3 Building blocks of Converter Board

The microprocessor performs the following tasks:

• Dimming of Ambi Light by means of PWM.

• Translation of I

C-bus commands to PWM.

• Switches the Ambi Light board to protection if needed (in case of protection only the lamps switch off, no set protection is triggered).

There are two ways of protection: parallel arcing protection and serial arcing protection. Parallel arcing protection is performed by sensing the switching frequency. In case of short circuit of the transformer output, this frequency > 100 kHz and the board goes into protection. Serial arcing protection is performed by detection of arc in ground wire of the lamp units. In this case, the protection pulse is transmitted via an opto-coupler. Protection can be disabled by short-circuiting diode 6112 or capacitor 2173 or by connecting pin 8 of the microprocessor to ground.

Repair Tips

In case only one or no lamp unit at all works, probably the +12Vb (12 - 13 V) is not available or the fuse is broken. Check for broken MOSFETS or check if they are switched off properly

-13V)

060406

Lamp unit A

Lamp unit B

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060406

Service Modes, Error Codes, and Fault Finding

EN 17EJ2.0U LA 5.

by the transistors connected to the PWM outputs of the microprocessor.

In case the Ambi Light switches off after two seconds, serial arcing or parallel arcing protection is active. Serial arcing protection can be excluded by disconnecting the opto-coupler; check for bad solder joints on transformer or lamp units. Parallel arcing protection can be disabled by grounding pin 8 of the microprocessor. Usually the switching frequency (normally 63 kHz) will then be too high. Possible causes are one MOSFET of the converter has no gate drive or is broken, or there is a short-circuit of the output of the transformer.

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 short cutting the pins on the SSB, the TV starts up until it reaches the situation just before protection. So, this is a kind of automatic 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).

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

• MP: protection or error detected by the VIPER Main Processor.

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

- WakeUp requested

- Acquisition needed

Stand-by

(Off St-by)

- POD Card remove

- Tact SW pushed

- No data Acquisition required and no POD present

- Tact SW pushed

Stand-by

Only applicable for sets with CableCARDTM slot (POD)

Mains

“off”

- WakeUp requested

- Acquisition needed

POD

Off

Semi

Stand-by

No data Acquisition

required and POD present

GoToProtec

Mains

“on”

GoToProtection

tion

WakeUp

requested

- St-by requested

- Tact SW pushed

WakeUp

requested

Protection

Active

GoToProtection

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Figure 5-4 Transition diagram

EN 18 EJ2.0U LA5.

Service Modes, Error Codes, and Fault Finding

action holder: MIPS

action holder: St-by

autonomous action

The audio protection circuit shuts down the

supply autonomously. This triggers a set restart

and during that restart (so at this check here), it

will be observed that the audio protection line is

high and the audio protection mode is entered.

Switching on the power supply in an LPL scanning backlight set, also switches on the backlight supply. The display should not be used the first 5 seconds the backlight supply is running due to a pre-heat time of 4s and a 100% light output (not adjustable) the next second. This 5 second delay does not delay the startup of the display as this time is absorbed in the startup time of the rest of the system.

Off

Mains is applied

Standby Supply starts running.

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

In case o f PDP 3V3 Vpr to CPU PDP become s presen t.

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.

PDPGO line is high (either HW wise in a non FHP set or

because of the stby µP reset in a FHP set) which is the good

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 both the

- Assert the Viper reset

state at cold boot to be able to start the FHP.

Audio Protection Line

HIGH?

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

+5V, Vtu n, +8V6 , +12VSW, +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 startup. Protection conditions in a

playing set will be ignored. The protection mode will

- Switch Sound-Enable and Reset-Audio high.

Yes

not be entered.

They are low in the standby mode if the

standby mode lasted longer than 10s.

Audio Error

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 observers is

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

order to minimize start up time.

- Only when the PDPGO is low, a retry should be considered (the PDP could have reset internally). If the PDPGO is already high, there is no use in trying to restart.

- PDPGO line is pulled high in all non FHP sets so this extra startup delay in case of a fault condition is not valid.

- Switching the PDPGO high will give a visual artefact and should only be done if really necessary.

detect-5V

received within

2900 ms after POD-MODE I/O

line toggle?

Yes

activate +5V supply detection algorithm

detect-12V received within

2900 ms after POD-mode I/O

line toggle?

Yes

activate +12V supply

detection algorithm

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

Enable the DC/DC converter for +1.2V.

Start polling the detect-1V2 every 40ms

PDPGO

High?

Switch PDPGO hig h:

PDP should start: 5V, 8V6 and

12V are activated

detect-5V

yes

received within

2900 ms after PDPGO

toggle?

Yes

+5V erro r

+12V error

detect-8V6 received

within 6300 ms after POD-mode I/O line

toggle? Startup shall not wait for this

detection and continue startup.

Yes

To Part BTo Part C To Part B To Part B

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

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Service Modes, Error Codes, and Fault Finding

EN 19EJ2.0U LA 5.

From Part A

detect-1V2

received within

250ms?

Yes

Enable the DC/DC converters for

+2.5V and +3.3V.

Start polling the detect-2V5

and detect-3V3 every 40ms

detect-2V5 and

detect-3V3 received within

250 ms?

Yes

Activate supply detection algorith ms for

+1.2V, +2.5 V and +3 .3V

SUPPLY-FAULT I/O lin e

is High?

Enable the supply fault detection

interru pt

From Part A From Part A From Part A

+1.2V err or

+2.5V or +3.3V errorNo

+8V6 err or

activate +8V6 supply

detection algorithm

return

action holder: MIPS

action holder: St-by

autonomous action

Supply fault errorYes

Release vipe r 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 rese t

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)

Yes

Release viper reset

Feed initializing boot script (3)

disable alive mechanism

Release PNX2015 reset 100ms

after Viper reset is released

RPC start (comm. protocol)

Flash to Ram image

transfer succeeded

wit hin 30 s?

Yes

To Part CTo Part CTo Part C To Part C

G_15990_103b.eps

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Figure 5-6 “Off” to “Semi Stand-by” flowchart (part 2)

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Service Modes, Error Codes, and Fault Finding

From Part BFrom Part A From Part B From Part B From Part B

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 converter .

Wait 5ms

switch off the remaining DC/DC

converters

Switch POD-MODE and ON-MODE

I/O line high.

Because of a bug in the Pacific IC, it will very rarely not startup properly. If this happens, only a cold boot can solve this (removal of power supplies). Since this is not feasible in the current SW architecture, instead Standby mode is entered.

NoNo

Code = 53

- Register PIIConfig of the Pacific3:

- in case of a non 1080p display, the LVDS bit should be set to 0 (CMOS input).

- in case of a 1080p display, the LVDS bit and the Dual Bus bit should be set to 1 (double lvds input).

- POIConfig of the Pacific3:

- in case of a non 1080p display, the LVDS bit should be set to 1 with the Dual Bus bit set to 0 (lvds out)

- in case of a 1080p display, the LVDS bit and the Dual Bus bit should be set to 1 (double lvds out)

- PanelConfig register: PanelOff = 0, PanelOn = 1. P3 can always be on, switching of lvds is done through PNX.

(AVIP's 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 PLL's and clocks and h ence enter to Full Power mode. See FMS AVIP for further details and the rest of the initialization.

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

it does not come, the standby µP will en ter a protection mode, this is not a dead end here)

Yes

Viper SW initializati on

succeeded

wit hin 20s ?

Yes

Enable Alive check mechanism

MIPS reads the wake up reason

from standby µP.

Set is

SDI PDP

FHP PDP?

Yes

Was Pacific responding

to I²C?

yes

Yes

Wait until Viper starts to

communicate

Power OK-display is

Hig h?

action holder: MIPS

action holder: St-by

autonomous action

Log display errorNo

Log Pacific error and

Go to Standby

Standby

initialize PNX2015 HD subsyst em

MPIF's 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 Hirate .

Initialize source select ion.

Initialize video processing IC's :

- Spider

initialize Columbus initialize 3D Combfilte r initialize AutoTV

Initialize Pacific related Ambilight settin gs

(if applicable)

Initialize Ambilight with Lights off.

Log appropriate

Observer error

Semi-Standby

Figure 5-7 “Off” to “Semi Stand-by” flowchart (part 3)

G_15990_103c.eps

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Service Modes, Error Codes, and Fault Finding

Constraints taken into account:

- Display may only be started when valid QV CP output clock can be delivered by the Viper.

- Between 0 and 20 ms after power is supplied, display should receive valid lvds clock.

- minim um wait tim e to switch on the lam p after power up is 200m s.

- RGB (on QVCP output) may be unblanked before valid output is available. Unblanking of the picture happens with the use of the 'lamp on', not with the RGB. By doing so, black level differences during startup are avoided.

The assumption here is that a fast toggle

(<1s) can only happen during ON->SEMI

->ON. In these states, the Viper is still

active and can provide the 1s delay. If

the transition ON->SE MI ->STBY->SE MI-

>ON can be made in less than 1s, we

have to delay the semi -> stby transition

until the requirem ent i s m et.

37" 1366*768 LCD SHARP

Semi Standby

Wait until previous on-state is left more than 1

second ago. (to prevent LCD display problems)

Assert RGB video blanking

and audio m ut e

EN 21EJ2.0U LA 5.

action holder: MIPS

action holder: St-by

autonomous action

Initialize audio and video processing IC's and

functions according needed use case.

Wait until QVCP generates a valid lvds output

Switch off RGB blanking

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

frame of min. 17.5ms to max. 37.5ms 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 on LCD lamp after valid, stable video, corresponding

to the requested output is delivered by the Viper

clock.

This unblank is moved forwards on demand

of SW to allow to obtain valid QVCP output

Switch on LCD supply

(LCD-Power-on)

(lamp ready delay)

Switch Audio-Reset and sound enable low and demute

(see CHS audio LdspMute interface).

Active

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

G_15940_045.eps

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EN 22 EJ2.0U LA5.

Service Modes, Error Codes, and Fault Finding

37" 1366*768 LCD SHARP

Active

Mute all sound outputs.

Switch reset-audio and sound-enable

lines high

switch off LCD lamp

Mute all video outputs

Wait 0ms. (No need to wait here

for the 37" Sharp panel)

Switch off LVDS signal

action holder: MIPS

action holder: St-by

autonomous action

Switch off 12V LCD supply within a time frame of max.

1000ms after LVDS switch off.

(Viper I/O: LCD_ PWR_ON)

Semi Standby

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

G_15940_046.eps

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Service Modes, Error Codes, and Fault Finding

EN 23EJ2.0U LA 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 POD-

MODE and the ON-MODE I/O lines.

Important remark:

release reset audio and sound-

enable 10 sec after entering

standby to save power

Stand by

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

G_15990_108.eps

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EN 24 EJ2.0U LA5.

Service Modes, Error Codes, and Fault Finding

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

off.

Ask stand-by µP to enter protection state

action holder: MIPS

action holder: St-by

autonomous action

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 the POD-

MODE and the ON-MODE I/O lines.

Flash LED in order to indicate protection state*.

Protection

Figure 5-11 “Protection” flowchart

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

G_15990_112.eps

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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 I2CPower

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 standardized (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.

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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.

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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”). 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 also blink the error code number. Further diagnosis can be done via ComPair.

• Errors detected by VIPER that do not lead to protection. In this case the error will be logged into the error buffer and 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 (hardware failure) P Stby µP PNX8550 Protection + Error blinking

6 5V supply P Stby µP Protection + Error blinking

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

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

12 12V supply P Stby µP Protection + Error blinking

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

16 MPIF1 Main Supply E VIPER PNX3000 IF I/O Error logged

17 MPIF1 Audio Supply (ASUP) 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

29 AVIP1 E VIPER PNX2015 AV input processor 1 Error logged

32 MPIF1 E VIPER KN10241C Analog Front End 1 Error logged

34 Tuner1 E VIPER Tuner 1 Error logged

37 Channel decoder E VIPER NXT2003 Error logged

43 Hi Rate Front End E VIPER TDA8751 HDMI Error logged

44 NVM P Stby µP see extra info

45 Columbus 1 E VIPER PNX2015 Comb filter Error logged

53 VIPER does not boot (software failure) P Stby µP PNX8550 Protection + Error blinking

63 PDP Display P VIPER Display Protection + Error blinking

PVIPER

PStby µP

PVIPER

I2C1_blocked

I2C2_blocked

I2C3_blocked

I2C4_blocked

Protection + Error blinking

Service Modes, Error Codes, and Fault Finding

EN 27EJ2.0U LA 5.

Extra Info

• Rebooting. When a TV is rebooting constantly due to internal problems, most of the time no errors will be logged or blinked. This rebooting can be recognized via a ComPair interface and Hyperterminal (for Hyperterminal settings, see paragraph “Stand-by software upgrade”). You will see that the loggings which are generated by the main software keep continuing. In this case (rebooting) diagnose has to be done via ComPair.

• Error 1 (I

C bus 1 blocked). When this error occurs, the TV will go to protection and the front LED will blink error 1. Now you can partially restart the TV via the SDM shortcut pins on the SSB. Depending on the software version it is possible that this error will not work correct: in some software versions error 34 was blinking in stead of error 1.

• Error 2 (I

C bus 2 blocked). When this error occurs, the TV will go to protection and the front LED will blink error 2. 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

When this error occurs, the TV will probably keep rebooting. Further diagnose has to be done via ComPair.

• 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 blink when the NVM gives no acknowledge on the I

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

• Error 4 (I

C bus 3. So, a missing 12 V can also lead to

C bus 4 blocked). When this error occurs, the TV will go to protection and the front led will blink error 4. Now you can start up the TV via the SDM short-cut pins on the SSB. The TV will start up and ignore the error. Depending on the problem it is even possible that you have picture.

• 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). This error is triggered in case of DC voltage on the speakers or an overvoltage or a too big voltage difference between the positive and negative audio supply. The mechanism for this error works as follows: when a problem is detected, the audio-protection line will switch off the main supply, the stand-by processor will “think” there is a voltage drop and will start up the TV again. At the beginning of the start up process the stand-by processor will detect that the audio-protection line is still “active” and will switch the TV to stand-by and blink error 14. Note that for 26-inch models there no possibility to switch off the main supply directly by the audio-protection line.

• Error 16 (MPIF1 main supply). This error is no longer valid. See error 32.

• Error 17 (MPIF1 audio supply). This error is no longer valid. See error 32.

• Error 27 (PNX2015 HD subsystem part). Diagnosing this error will not be possible via the normal errorcodes. In case this device can not communicate with the Viper via I

C, it will not be possible to initialize the tunnelbus. Hence the software will not be able to start up, and will reboot constantly. Diagnosing these problems will only be possible via ComPair. In theory it is possible that this error is still logged in the NVM. That’s why it is still mentioned here.

• Error 29 (AVIP1). Same remark as for error 27.

• Error 31 (AVIP2). Same remark as for error 27.

• Error 32 (MPIF1). Together with error 32, you will probably see error 16 and 17. These errors are no longer valid.

• 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. 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

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Service Modes, Error Codes, and Fault Finding

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 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 or an overvoltage or a too big voltage difference between the positive and negative audio supply. In that case the main supply is switched "off", but the stand-by supply is still working. See also extra info for error 14. 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 Tip

• It is 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 supply voltage +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.

4. Check the over-current detection circuit (2U12 or 3U97

interrupted).

Service Modes, Error Codes, and Fault Finding

EN 29EJ2.0U LA 5.

• Symptom: +1V2 present for about 100 ms. Supplies +2V5 and +3V3 not rising.

1. Check the ENABLE-3V3 signal (active "low").

2. Check the voltage on pin 8 (1.5 V).

3. Check the under-voltage detection circuit (the voltage

on collector of transistor 7U10-1 should be less than

0.8 V).

4. Check for output voltages short-circuits to GND (+3V3,

+2V5 and +2V5D) that generate pulsed over-currents of 7-10 A through coil 5U00.

5. Check the over-current detection circuit (2U18 or 3U83

interrupted).

• Symptom: +1V2 OK, but +2V5 and +3V3 present for about 100 ms. Cause: The SUPPLY-FAULT line stays "low" even though the +3V3 and +1V2 is available. The Stand-by Processor is detecting that and switches all supply voltages "off".

1. Check the drop voltage across resistor 3U22 (this

could be too high)

2. Check if the +1V2 or +3V3 are higher than their normal

values. This can be due to defective DC feedback of the respective DC/DC converter (3U18 or 3UA7).

• Symptom: +1V2, +2V5, and +3V3 look okay, except the ripple voltage is increased (audible noise can come from the filtering coils 5U00 or 5U03). Cause: Instability of the frequency and/or duty cycle of one or both DC/DC converters. – Check resistor 3U06, the decoupling capacitors, the

AC feedback circuits (2U20 + 2U21 + 3U14 + 3U15 for +1V2 or 2U19 + 2U85 + 3U12 + 3U13 for +3V3), the compensation capacitors 2U09, 2U10, 2U23 and 2U73, and IC 7U00.

Note 1: If fuse 1U01 is broken, this usually means a pair of defective power MOSFETs (7U01 or 7U03). Item 7U00 should be replaced as well in this case.

5.9.2 Main Software Upgrade

The software image resides in the NAND-Flash, and is formatted in the following way:

Partition 1

Trimedia2 image Trimedia1 image MIPS image

Partition 0

USB Download Application

uBTM (boot block)

Figure 5-13 NAND-Flash format

Executables are stored as files in a file system. The boot loader (uBTM) will load the USB Download Application in partition 0 (USB drivers, bootscript, etc.). This application makes it then possible to upgrade the main software via USB.

Installing "Partition 0" software is possible via an external EJTAG tool, but also in a special way with the USB stick (see description in paragraph “Partition 0“).

Partition 1 (Customer)

To do a main software upgrade (partition 1) via USB, the set must be operational, and the "Partition 0" files for the VIPER must be installed in the NAND-Flash!

The new software can be uploaded to the TV by using a portable memory device or USB storage compliant devices (e.g. USB memory stick). You can download the new software from the Philips website to your PC.

USB CUSTOMER

USB SERVICE

EJTAG

E_14700_082.eps

120505

5.9 Software Upgrading

5.9.1 Introduction

The set software and security keys are stored in a NAND-Flash (item 7P80), which is connected to the VIPER via the PCI bus.

It is possible for the user to upgrade the main software via the USB port. This allows replacement of a software image in a standalone set, without the need of an E-JTAG debugger. A description on how to upgrade the main software can be found in chapter 3 "Directions For Use".

Important: When the NAND-Flash must be replaced, a new SSB must be ordered, due to the presence of the security keys!!! See table “SSB service kits” for the order codes. Perform the following actions after SSB replacement:

1. Set the correct option codes (see sticker inside the TV).

2. Update the TV software (see chapter 3 for instructions).

3. Perform the alignments as described in chapter 8.

4. Check in CSM menu 5 if the HDMI keys are valid.

Table 5-4 SSB service kits

Model Number

37PF9631D/37 3104 328 46521 3104 328 47611

SSB factory assy code

1) Information in column “SSB factory assy code” is only for

reference purposes. Do not use this code when ordering a new SSB!

New SSB order code

Partition 0 (Service)

If the "Partition 0" software is corrupted, the software needs to be re-installed. To upgrade this “USB download application” (partition 0 except the bootblock), insert an USB stick with the correct software, but press the “red” button on the remote control (in ”TV” mode) when it is asked via the on screen text.

Caution:

• The USB download application will now erase both partitions (except the boot block), so you need to reload the main SW after upgrading the USB download application. As long as this is not done, the USB download application will start when the set is switched “on”.

• When something goes wrong during the progress of this method (e.g. voltage dip or corrupted software file), the set will not start up, and can only be recovered via the EJTAG tool!

EN 30 EJ2.0U LA5.

5.9.3 Manual Start of the Main Software Upgrade Application

Normally, the software upgrading procedure will start automatically, when a memory device with the correct software is inserted, but in case this does not work, it is possible to force the TV into the software upgrade application. To do so:

• Disconnect the TV from the Mains/AC Power.

• Press the “OK” button on a Philips DVD RC-6 remote control (it is also possible to use the TV remote in "DVD" mode).

• Keep the “OK” button pressed while connecting the TV to the Mains/AC Power.

• The software upgrade application will start.

• When a memory device with upgrade software is connected, the upgrade process will start.

5.9.4 Stand-by Software Upgrade

It will be possible to upgrade the Stand-by software via a PC and the ComPair interface. Check paragraph "ComPair" on how to connect the interface. To upgrade the Stand-by software, use the following steps:

1. Disconnect the TV from the Mains/AC Power.

2. Short circuit the SPI pins [2] on the SSB. They are located outside the shielding (see figure “SDM and SPI service pads” earlier in this chapter).

3. Keep the SPI pins shorted while connecting the TV to the Mains/AC Power.

4. Release the short circuit after approx. two seconds.

5. Start up HyperTerminal (can be found in every Windows application via Programs -> Accessories -> Communications -> HyperTerminal. Use the following settings: –COM1 – Bits per second = 38400 – Data bits = 8 – Parity = none – Stop bits = 1 – Flow control = Xon / Xoff.

6. Press “Shift U” on your PC keyboard. You should now see the following info: – PNX2015 Loader V1.0 – 19-09-2003 – DEVID=0x05 –Erasing – MCSUM=0x0000 –=

7. If you do not see the above info, restart the above procedure, and check your HyperTerminal settings and the connections between PC and TV.

8. Via “Transfer” -> “Send text file ...”, you can send the proper upgrade file to the TV. This file will be distributed via the Service Organization.

9. After successful programming, you must see the following info: – DCSUM=0xECB3 –:Ok – MCSUM=0xECB3 – Programming – PCSUM=0xECB3 – Finished

10. If you do not see this info, restart the complete procedure.

11. Close HyperTerminal.

12. Disconnect and connect Mains/AC Power again.

Service Modes, Error Codes, and Fault Finding

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