Philips Q552.2E LA Service manual

Colour Television Chassis
19100_000_110214.eps
110214
LA

Contents Page Contents Page

1. Revision List 2
2. Technical Specifications, Diversity, and Connections2
3. Precautions, Notes, and Abbreviation List 6
4. Mechanical Instructions 10
5. Service Modes, Error Codes, and Fault Finding 17
6. Alignments 36
7. Circuit Descriptions 40
8. IC Data Sheets 46
9. Block Diagrams Wiring diagram Blockbuster 32" 59 Wiring diagram Blockbuster 37" 60 Wiring diagram Blockbuster 40" 61 Block Diagram Video 62 Block Diagram Audio 63 Block Diagram Control & Clock Signals 64 Block Diagram I2C 65 Supply Lines Overview 66
10. Circuit Diagrams and PWB Layouts Drawing B01 393912364954 B02 393912364954 78 B03 393912364954 87 B04 393912364954 95 B05 393912364954 100 B06 393912364954 101 B07 393912364954 105 B08 393912364954 106 B09 393912364954 108 313912364954 SSB Layout 109 E 27221719026x IR/LED/Key Board 111
11. Styling Sheets Blockbuster 32" 112 Blockbuster 37" 113 Blockbuster 40"& 46" 114
67
©
Copyright 2011 Koninklijke Philips Electronics N.V. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by ER/TY 1162 BU TV Consumer Care, the Netherlands Subject to modification EN 3122 785 19100
2011-Feb-18
EN 2 Q552.2E LA1.
Revision List

1. Revision List

Manual xxxx xxx xxxx.0
First release.

2. Technical Specifications, Diversity, and Connections

Index of this chapter:

2.1 Technical Specifications

2.2 Directions for Use

2.3 Connections
2.4 Chassis Overview
Notes:
Figures can deviate due to the different set executions.
Specifications are indicative (subject to change).

Table 2-1 Described Model Numbers and Diversity

SSB 2 4 7 9 10
Mechanics Descriptions
CTN Styling
32PFL6606H/12 Blockbuster
32PFL6606K/02 Blockbuster
37PFL6606H/12 Blockbuster
37PFL6606K/02 Blockbuster
40PFL6606H/12 Blockbuster
40PFL6606K/02 Blockbuster
11-1
11-1
11-2
11-2
11-3
11-3
3139 123 xxxxx
Connection Overview
Wire Dressing
Assembly Removal
LCD Removal
PSU
64954 2.3 4-1 4.3 4.3.8 7.2 7.4.1 - - 9-1 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -
64954 2.3 4-1 4.3 4.3.8 7.2 7.4.1 - - 9-1 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -
64954 2.3 4-2 4.3 4.3.8 7.2 7.4.1 - - 9-2 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -
64954 2.3 4-2 4.3 4.3.8 7.2 7.4.1 - - 9-2 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -
64954 2.3 4-3 4.3 4.3.8 7.2 7.4.1 - - 9-3 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -
64954 2.3 4-3 4.3 4.3.8 7.2 7.4.1 - - 9-3 - - 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-11 - -
Tuner
2.1 Technical Specifications
For on-line product support please use the CTN links in Table
2-1. Here is product information available, as well as getting
started, user manuals, frequently asked questions and software & drivers.
Schematics
TCON
Wiring Diagram
ALxx (Ambilight) LiteOn
ALxx (Ambilight) Everlight
B01 (Tuner)
B02 (PNX85500)
B03 (DC/DC / Class D)
B04 (I/O)
B05 (DDR)
B06 (non-DVBS-LVDS)
B07 (DVBS-FE)
B08 (DVBS-Supp.)
B09 (non-DVBS-conn.)
E (IR/LED/Key Board)
-
-
AmbiLight
2.2 Directions for Use
You can download this information from the following websites:
http://www.philips.com/support http://www.p4c.philips.com
2011-Feb-18
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2.3 Connections

REAR CONNECTORS
BOTTOM REAR CONNECTORS
SIDE CONNECTORS
19100_043_110214.eps
110216
12
5
3
4
2
1
13
14
15
16
6 7 8 9 10 11
Technical Specifications, Diversity, and Connections
EN 3Q552.2E LA 2.
Note: The following connector colour abbreviations are used
(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy= Grey, Rd= Red, Wh= White, Ye= Yellow.

2.3.1 Rear Connections

1 - EXT1: Video RGB - In, CVBS - In/Out, Audio - In/Out
20
21
10000_001_090121.eps
Figure 2-2 SCART connector
1 - Audio R 0.5 V 2 - Audio R 0.5 V 3 - Audio L 0.5 V 4 - Ground Audio Gnd H 5 - Ground Blue Gnd H 6 - Audio L 0.5 V 7 - Video Blue 0.7 V 8 - Function Select 0 - 2 V: INT
4.5 - 7 V: EXT 16:9
9.5 - 12 V: EXT 4:3 j
9 - Ground Green Gnd H 10 - n.c. 11 - Video Green 0.7 V 12 - n.c.

Figure 2-1 Connection overview

2
1
090121
/ 1 kohm k
RMS
/ 10 kohm j
RMS
/ 1 kohm k
RMS
/ 10 kohm j
RMS
/ 75 ohm jk
PP
/ 75 ohm j
PP
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13 - Ground Red Gnd H 14 - Ground P50 Gnd H 15 - Video Red 0.7 V 16 - Status/FBL 0 - 0.4 V: INT
17 - Ground Video Gnd H 18 - Ground FBL Gnd H 19 - Video CVBS/Y 1 V 20 - Video CVBS 1 V 21 - Shield Gnd H
2 - Service Connector (UART)
1 - Ground Gnd H 2 - UART_TX Transmit k 3 - UART_RX Receive j
3 - EXT2: Cinch: Video YPbPr - In, Audio - In
Gn -Video Y 1 V Bu - Video Pb 0.7 V Rd - Video Pr 0.7 V Rd - Audio - R 0.5 V Wh - Audio - L 0.5 V
4 - Cinch: Audio - In (VGA/DVI)
Rd - Audio R 0.5 V Wh - Audio L 0.5 V
5 - SAT - In
- - F-type Coax, 75 ohm D
/ 75 ohm j
PP
1 - 3 V: EXT / 75 ohm j
/ 75 ohm k
PP
/ 75 ohm j
PP
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
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EN 4 Q552.2E LA2.
1123 45678
10000_025_090121.eps
090121
10000_017_090121.eps
090428
19
1
18 2
10000_017_090121.eps
090428
19
1
18 2
1
6
10
11
5
15
10000_002_090121.eps
090127
10000_049_100210.eps
100210
10
11
12
CD
GND
WP
14
GND
13
GND
1
2
3
4
5
6
7
8
9
DAT3/CS
CMD/DI
GND1
VDD
CLOCK
GND2
DAT0/D0
DAT1/IRQ
DAT2/NC
Technical Specifications, Diversity, and Connections

2.3.2 Rear Connections - Bottom

6 - RJ45: Ethernet
Figure 2-3 Ethernet connector
1 - TD+ Transmit signal k 2 - TD- Transmit signal k 3 - RD+ Receive signal j 4 - CT Centre Tap: DC level fixation 5 - CT Centre Tap: DC level fixation 6 - RD- Receive signal j 7 - GND Gnd H 8 - GND Gnd H
7 - Cinch: S/PDIF - Out
Bk - Coaxial 0.4 - 0.6V
/ 75 ohm kq
PP
8 - HDMI 2: Digital Video, Digital Audio - In
Figure 2-4 HDMI (type A) connector
1 - D2+ Data channel j 2 - Shield Gnd H 3 - D2- Data channel j 4 - D1+ Data channel j 5 - Shield Gnd H 6 - D1- Data channel j 7 - D0+ Data channel j 8 - Shield Gnd H 9 - D0- Data channel j 10 - CLK+ Data channel j 11 - Shield Gnd H 12 - CLK- Data channel j 13 - Easylink/CEC Control channel jk 14 - n.c. 15 - DDC_SCL DDC clock j 16 - DDC_SDA DDC data jk 17 - Ground Gnd H 18 - +5V j 19 - HPD Hot Plug Detect j 20 - Ground Gnd H
13 - Easylink/CEC Control channel jk 14 - ARC Audio Return Channel k 15 - DDC_SCL DDC clock j 16 - DDC_SDA DDC data jk 17 - Ground Gnd H 18 - +5V j 19 - HPD Hot Plug Detect j 20 - Ground Gnd H
10 - Aerial - In
- - IEC-type (EU) Coax, 75 ohm D
11 - VGA: Video RGB - In
Figure 2-6 VGA Connector
1 - Video Red 0.7 V 2 - Video Green 0.7 V 3 - Video Blue 0.7 V 4-n.c.
/ 75 ohm j
PP
/ 75 ohm j
PP
/ 75 ohm j
PP
5 - Ground Gnd H 6 - Ground Red Gnd H 7 - Ground Green Gnd H 8 - Ground Blue Gnd H 9-+5V 10 - Ground Sync Gnd H
+5 V j
DC
11 - n.c. 12 - DDC_SDA DDC data j 13 - H-sync 0 - 5 V j 14 - V-sync 0 - 5 V j 15 - DDC_SCL DDC clock j

2.3.3 Side Connections

12 - Common Interface
68p - See diagram B01A Common Interface
jk
13 - SD-Card: Secure Digital Card - In/Out (optional)
9 - HDMI 1: Digital Video - In, Digital Audio with ARC - In/ Out
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
2011-Feb-18
12 - CLK- Data channel j
Figure 2-5 HDMI (type A) connector
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Figure 2-7 SD-Card connector
1 - DAT3/CS Signal jk 2 - CMD/DI Signal k 3 - GND1 Gnd H 4 - Vdd Supply k 5 - CLOCK Signal k 6 - GND2 Gnd H 7 - DAT0/D0 Signal jk 8 - DAT1/IRQ Signal jk 9 - DAT2/NC Signal jk 10 - CD Signal j 11 - GND Gnd H
Technical Specifications, Diversity, and Connections
1 2 3 4
10000_022_090121.eps
090121
EN 5Q552.2E LA 2.
12 - WP Signal j 13 - GND Gnd H 14 - GND Gnd H
14 - USB2.0
Figure 2-8 USB (type A)

2.4 Chassis Overview

Refer to chapter Block Diagrams for PWB/CBA locations.
1-+5V k 2 - Data (-) jk 3 - Data (+) jk 4 - Ground Gnd H
15 - Head phone (Output)
Bk - Head phone 32 - 600 ohm / 10 mW ot
16 - HDMI : Digital Video, Digital Audio - In
See 8 - HDMI 2: Digital Video, Digital Audio - In
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2011-Feb-18
EN 6 Q552.2E LA3.
Precautions, Notes, and Abbreviation List

3. Precautions, Notes, and Abbreviation List

Index of this chapter:

3.1 Safety Instructions

3.2 Warnings

3.3 Notes

3.4 Abbreviation List
3.1 Safety Instructions
Safety regulations require the following during a repair:
Connect the set to the Mains/AC Power via an isolation transformer (> 800 VA).
Replace safety components, indicated by the symbol h, only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.
Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points:
Route the wire trees correctly and fix them with the mounted cable clamps.
Check the insulation of the Mains/AC Power lead for external damage.
Check the strain relief of the Mains/AC Power cord for proper function.
Check the electrical DC resistance between the Mains/AC Power plug and the secondary side (only for sets that have a Mains/AC Power isolated power supply):
1. Unplug the Mains/AC Power cord and connect a wire
between the two pins of the Mains/AC Power plug.
2. Set the Mains/AC Power switch to the “on” position
(keep the Mains/AC Power cord unplugged!).
3. Measure the resistance value between the pins of the
Mains/AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 M and 12 M.
4. Switch “off” the set, and remove the wire between the
two pins of the Mains/AC Power plug.
Check the cabinet for defects, to prevent touching of any inner parts by the customer.
Where necessary, measure the waveforms and voltages
with (D) and without (E) aerial signal. Measure the voltages in the power supply section both in normal operation (G) and in stand-by (F). These values are indicated by means of the appropriate symbols.

3.3.2 Schematic Notes

All resistor values are in ohms, and the value multiplier is often used to indicate the decimal point location (e.g. 2K2 indicates 2.2 k).
Resistor values with no multiplier may be indicated with either an “E” or an “R” (e.g. 220E or 220R indicates 220 ).
All capacitor values are given in micro-farads (10 nano-farads (n 10
Capacitor values may also use the value multiplier as the decimal point indication (e.g. 2p2 indicates 2.2 pF).
An “asterisk” (*) indicates component usage varies. Refer to the diversity tables for the correct values.
The correct component values are listed on the Philips Spare Parts Web Portal.

3.3.3 Spare Parts

For the latest spare part overview, consult your Philips Spare Part web portal.

3.3.4 BGA (Ball Grid Array) ICs

Introduction
For more information on how to handle BGA devices, visit this URL: http://www.atyourservice-magazine.com “Magazine”, then go to “Repair downloads”. Here you will find Information on how to deal with BGA-ICs.
BGA Temperature Profiles
For BGA-ICs, you must use the correct temperature-profile. Where applicable and available, this profile is added to the IC Data Sheet information section in this manual.
-9
), or pico-farads (p 10
. Select
-12
-6
),
).
3.2 Warnings
All ICs and many other semiconductors are susceptible to
electrostatic discharges (ESD w). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential.
Be careful during measurements in the high voltage section.
Never replace modules or other components while the unit is switched “on”.
When you align the set, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable.
3.3 Notes

3.3.1 General

Measure the voltages and waveforms with regard to the chassis (= tuner) ground (H), or hot ground (I), depending on the tested area of circuitry. The voltages and waveforms shown in the diagrams are indicative. Measure them in the Service Default Mode with a colour bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or 61.25 MHz for NTSC (channel 3).
2011-Feb-18

3.3.5 Lead-free Soldering

Due to lead-free technology some rules have to be respected by the workshop during a repair:
Use only lead-free soldering tin. If lead-free solder paste is required, please contact the manufacturer of your soldering equipment. In general, use of solder paste within workshops should be avoided because paste is not easy to store and to handle.
Use only adequate solder tools applicable for lead-free soldering tin. The solder tool must be able: – To reach a solder-tip temperature of at least 400°C. – To stabilize the adjusted temperature at the solder-tip. – To exchange solder-tips for different applications.
Adjust your solder tool so that a temperature of around 360°C - 380°C is reached and stabilized at the solder joint. Heating time of the solder-joint should not exceed ~ 4 sec. Avoid temperatures above 400°C, otherwise wear-out of tips will increase drastically and flux-fluid will be destroyed. To avoid wear-out of tips, switch “off” unused equipment or reduce heat.
Mix of lead-free soldering tin/parts with leaded soldering tin/parts is possible but PHILIPS recommends strongly to avoid mixed regimes. If this cannot be avoided, carefully clear the solder-joint from old tin and re-solder with new tin.

3.3.6 Alternative BOM identification

It should be noted that on the European Service website, “Alternative BOM” is referred to as “Design variant”.
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Precautions, Notes, and Abbreviation List
EN 7Q552.2E LA 3.
The third digit in the serial number (example: AG2B0335000001) indicates the number of the alternative B.O.M. (Bill Of Materials) that has been used for producing the specific TV set. In general, it is possible that the same TV model on the market is produced with e.g. two different types of displays, coming from two different suppliers. This will then result in sets which have the same CTN (Commercial Type Number; e.g. 28PW9515/12) but which have a different B.O.M. number. By looking at the third digit of the serial number, one can identify which B.O.M. is used for the TV set he is working with. If the third digit of the serial number contains the number “1” (example: AG1B033500001), then the TV set has been manufactured according to B.O.M. number 1. If the third digit is a “2” (example: AG2B0335000001), then the set has been produced according to B.O.M. no. 2. This is important for ordering the correct spare parts! For the third digit, the numbers 1...9 and the characters A...Z can be used, so in total: 9 plus 26= 35 different B.O.M.s can be indicated by the third digit of the serial number.
Identification: The bottom line of a type plate gives a 14-digit serial number. Digits 1 and 2 refer to the production centre (e.g. AG is Bruges), digit 3 refers to the B.O.M. code, digit 4 refers to the Service version change code, digits 5 and 6 refer to the production year, and digits 7 and 8 refer to production week (in example below it is 2006 week 17). The 6 last digits contain the serial number.
MODEL :
PROD.NO:
32PF9968/10
AG 1A0617 000001
MADE IN BELGIUM
220-240V 50/60Hz
VHF+S+H+UHF
S
10000_024_090121.eps
~
BJ3.0E LA
Figure 3-1 Serial number (example)

3.3.7 Board Level Repair (BLR) or Component Level Repair (CLR)

If a board is defective, consult your repair procedure to decide if the board has to be exchanged or if it should be repaired on component level. If your repair procedure says the board should be exchanged completely, do not solder on the defective board. Otherwise, it cannot be returned to the O.E.M. supplier for back charging!

3.3.8 Practical Service Precautions

It makes sense to avoid exposure to electrical shock.
While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.
Always respect voltages. While some may not be
dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.
128W
100105

3.4 Abbreviation List

0/6/12 SCART switch control signal on A/V
board. 0 = loop through (AUX to TV), 6 = play 16 : 9 format, 12 = play 4 : 3 format
AARA Automatic Aspect Ratio Adaptation:
algorithm that adapts aspect ratio to remove horizontal black bars; keeps the original aspect ratio
ACI Automatic Channel Installation:
algorithm that installs TV channels directly from a cable network by
means of a predefined TXT page ADC Analogue to Digital Converter AFC Automatic Frequency Control: control
signal used to tune to the correct
frequency AGC Automatic Gain Control: algorithm that
controls the video input of the feature
box AM Amplitude Modulation AP Asia Pacific AR Aspect Ratio: 4 by 3 or 16 by 9 ASF Auto Screen Fit: algorithm that adapts
aspect ratio to remove horizontal black
bars without discarding video
information ATSC Advanced Television Systems
Committee, the digital TV standard in
the USA ATV See Auto TV Auto TV A hardware and software control
system that measures picture content,
and adapts image parameters in a
dynamic way AV External Audio Video AVC Audio Video Controller AVIP Audio Video Input Processor B/G Monochrome TV system. Sound
carrier distance is 5.5 MHz BDS Business Display Solutions (iTV) BLR Board-Level Repair BTSC Broadcast Television Standard
Committee. Multiplex FM stereo sound
system, originating from the USA and
used e.g. in LATAM and AP-NTSC
countries B-TXT Blue TeleteXT C Centre channel (audio) CEC Consumer Electronics Control bus:
remote control bus on HDMI
connections CL Constant Level: audio output to
connect with an external amplifier CLR Component Level Repair ComPair Computer aided rePair CP Connected Planet / Copy Protection CSM Customer Service Mode CTI Color Transient Improvement:
manipulates steepness of chroma
transients CVBS Composite Video Blanking and
Synchronization DAC Digital to Analogue Converter DBE Dynamic Bass Enhancement: extra
low frequency amplification DCM Data Communication Module. Also
referred to as System Card or
Smartcard (for iTV). DDC See “E-DDC” D/K Monochrome TV system. Sound
carrier distance is 6.5 MHz DFI Dynamic Frame Insertion
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EN 8 Q552.2E LA3.
Precautions, Notes, and Abbreviation List
DFU Directions For Use: owner's manual DMR Digital Media Reader: card reader DMSD Digital Multi Standard Decoding DNM Digital Natural Motion DNR Digital Noise Reduction: noise
reduction feature of the set DRAM Dynamic RAM DRM Digital Rights Management DSP Digital Signal Processing DST Dealer Service Tool: special remote
control designed for service
technicians DTCP Digital Transmission Content
Protection; A protocol for protecting
digital audio/video content that is
traversing a high speed serial bus,
such as IEEE-1394 DVB-C Digital Video Broadcast - Cable DVB-T Digital Video Broadcast - Terrestrial DVD Digital Versatile Disc DVI(-d) Digital Visual Interface (d= digital only) E-DDC Enhanced Display Data Channel
(VESA standard for communication
channel and display). Using E-DDC,
the video source can read the EDID
information form the display. EDID Extended Display Identification Data
(VESA standard) EEPROM Electrically Erasable and
Programmable Read Only Memory EMI Electro Magnetic Interference EPG Electronic Program Guide EPLD Erasable Programmable Logic Device EU Europe EXT EXTernal (source), entering the set by
SCART or by cinches (jacks) FDS Full Dual Screen (same as FDW) FDW Full Dual Window (same as FDS) FLASH FLASH memory FM Field Memory or Frequency
Modulation FPGA Field-Programmable Gate Array FTV Flat TeleVision Gb/s Giga bits per second G-TXT Green TeleteXT H H_sync to the module HD High Definition HDD Hard Disk Drive HDCP High-bandwidth Digital Content
Protection: A “key” encoded into the
HDMI/DVI signal that prevents video
data piracy. If a source is HDCP coded
and connected via HDMI/DVI without
the proper HDCP decoding, the
picture is put into a “snow vision” mode
or changed to a low resolution. For
normal content distribution the source
and the display device must be
enabled for HDCP “software key”
decoding. HDMI High Definition Multimedia Interface HP HeadPhone I Monochrome TV system. Sound
2
I
C Inter IC bus
2
I
D Inter IC Data bus
2
I
S Inter IC Sound bus
carrier distance is 6.0 MHz
IF Intermediate Frequency IR Infra Red IRQ Interrupt Request ITU-656 The ITU Radio communication Sector
(ITU-R) is a standards body
subcommittee of the International
Telecommunication Union relating to
radio communication. ITU-656 (a.k.a.
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SDI), is a digitized video format used for broadcast grade video. Uncompressed digital component or digital composite signals can be used. The SDI signal is self-synchronizing, uses 8 bit or 10 bit data words, and has a maximum data rate of 270 Mbit/s, with a minimum bandwidth of 135 MHz.
ITV Institutional TeleVision; TV sets for
hotels, hospitals etc.
LS Last Status; The settings last chosen
by the customer and read and stored in RAM or in the NVM. They are called at start-up of the set to configure it according to the customer's
preferences LATAM Latin America LCD Liquid Crystal Display LED Light Emitting Diode L/L' Monochrome TV system. Sound
carrier distance is 6.5 MHz. L' is Band
I, L is all bands except for Band I LPL LG.Philips LCD (supplier) LS Loudspeaker LVDS Low Voltage Differential Signalling Mbps Mega bits per second M/N Monochrome TV system. Sound
carrier distance is 4.5 MHz MHEG Part of a set of international standards
related to the presentation of
multimedia information, standardised
by the Multimedia and Hypermedia
Experts Group. It is commonly used as
a language to describe interactive
television services MIPS Microprocessor without Interlocked
Pipeline-Stages; A RISC-based
microprocessor MOP Matrix Output Processor MOSFET Metal Oxide Silicon Field Effect
Transistor, switching device MPEG Motion Pictures Experts Group MPIF Multi Platform InterFace MUTE MUTE Line MTV Mainstream TV: TV-mode with
Consumer TV features enabled (iTV) NC Not Connected NICAM Near Instantaneous Compounded
Audio Multiplexing. This is a digital
sound system, mainly used in Europe. NTC Negative Temperature Coefficient,
non-linear resistor NTSC National Television Standard
Committee. Color system mainly used
in North America and Japan. Color
carrier NTSC M/N= 3.579545 MHz,
NTSC 4.43= 4.433619 MHz (this is a
VCR norm, it is not transmitted off-air) NVM Non-Volatile Memory: IC containing
TV related data such as alignments O/C Open Circuit OSD On Screen Display OAD Over the Air Download. Method of
software upgrade via RF transmission.
Upgrade software is broadcasted in
TS with TV channels. OTC On screen display Teletext and
Control; also called Artistic (SAA5800) P50 Project 50: communication protocol
between TV and peripherals PAL Phase Alternating Line. Color system
mainly used in West Europe (color
carrier= 4.433619 MHz) and South
America (color carrier PAL M=
Precautions, Notes, and Abbreviation List
EN 9Q552.2E LA 3.
3.575612 MHz and PAL N= 3.582056
MHz) PCB Printed Circuit Board (same as “PWB”) PCM Pulse Code Modulation PDP Plasma Display Panel PFC Power Factor Corrector (or Pre-
conditioner) PIP Picture In Picture PLL Phase Locked Loop. Used for e.g.
FST tuning systems. The customer
can give directly the desired frequency POD Point Of Deployment: a removable
CAM module, implementing the CA
system for a host (e.g. a TV-set) POR Power On Reset, signal to reset the uP PSDL Power Supply for Direct view LED
backlight with 2D-dimming PSL Power Supply with integrated LED
drivers PSLS Power Supply with integrated LED
drivers with added Scanning
functionality PTC Positive Temperature Coefficient,
non-linear resistor PWB Printed Wiring Board (same as “PCB”) PWM Pulse Width Modulation QRC Quasi Resonant Converter QTNR Quality Temporal Noise Reduction QVCP Quality Video Composition Processor RAM Random Access Memory RGB Red, Green, and Blue. The primary
color signals for TV. By mixing levels
of R, G, and B, all colors (Y/C) are
reproduced. RC Remote Control RC5 / RC6 Signal protocol from the remote
control receiver RESET RESET signal ROM Read Only Memory RSDS Reduced Swing Differential Signalling
data interface R-TXT Red TeleteXT SAM Service Alignment Mode S/C Short Circuit SCART Syndicat des Constructeurs
d'Appareils Radiorécepteurs et
Téléviseurs SCL Serial Clock I SCL-F CLock Signal on Fast I SD Standard Definition SDA Serial Data I SDA-F DAta Signal on Fast I
2
C
2
C bus
2
C
2
C bus SDI Serial Digital Interface, see “ITU-656” SDRAM Synchronous DRAM SECAM SEequence Couleur Avec Mémoire.
Color system mainly used in France and East Europe. Color carriers=
4.406250 MHz and 4.250000 MHz SIF Sound Intermediate Frequency SMPS Switched Mode Power Supply SoC System on Chip SOG Sync On Green SOPS Self Oscillating Power Supply SPI Serial Peripheral Interface bus; a 4-
wire synchronous serial data link
standard S/PDIF Sony Philips Digital InterFace SRAM Static RAM SRP Service Reference Protocol SSB Small Signal Board SSC Spread Spectrum Clocking, used to
reduce the effects of EMI STB Set Top Box STBY STand-BY SVGA 800 × 600 (4:3)
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SVHS Super Video Home System SW Software SWAN Spatial temporal Weighted Averaging
Noise reduction SXGA 1280 × 1024 TFT Thin Film Transistor THD Total Harmonic Distortion TMDS Transmission Minimized Differential
Signalling TS Transport Stream TXT TeleteXT TXT-DW Dual Window with TeleteXT UI User Interface uP Microprocessor UXGA 1 600 × 1 200 (4:3) V V-sync to the module VESA Video Electronics Standards
Association VGA 640 × 480 (4:3) VL Variable Level out: processed audio
output toward external amplifier VSB Vestigial Side Band; modulation
method WYSIWYR What You See Is What You Record:
record selection that follows main
picture and sound WXGA 1280 × 768 (15:9) XTAL Quartz crystal XGA 1024 × 768 (4:3) Y Luminance signal Y/C Luminance (Y) and Chrominance (C)
signal YPbPr Component video. Luminance and
scaled color difference signals (B-Y
and R-Y) YUV Component video
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Mechanical Instructions

4. Mechanical Instructions

Index of this chapter:

4.1 Cable Dressing Blockbuster Styling (xxPFL66xx/xx series)

4.2 Service Positions
4.3 Assy/Panel Removal Sundance Styling (xxPFL76xx/xx series)
4.4 Set Re-assembly
Notes:
Figures below can deviate slightly from the actual situation, due to the different set executions.
4.1 Cable Dressing Blockbuster Styling (xxPFL66xx/xx series)
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Figure 4-1 Cable dressing 32PFL6606x/xx (Blockbuster)

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

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

4.2 Service Positions

For easy servicing of a TV set, the set should be put face down on a soft flat surface, foam buffers or other specific workshop tools. Ensure that a stable situation is created to perform measurements and alignments. When using foam bars take care that these always support the cabinet and never only the display. Caution: Failure to follow these guidelines can seriously damage the display! Ensure that ESD safe measures are taken.

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

The instructions in this section also apply to the Blockbuster sets (xxPFL66xx/xx series).
For the 40" and 46" Blockbuster sets, additional instructions (rear cover removal) apply. Refer to subsection Additional
instructions for Blockbuster 40-/46PFL6606x/xx.
The instructions apply to the 32PFL7406K/02.

4.3.1 Rear Cover

1. Remove all screws of the rear cover.
2. Lift the rear cover from the TV. Make sure that wires and flat coils are not damaged while lifting the rear cover from the set.
Additional instructions for Blockbuster 40-/46PFL6606x/xx
40"and 46"Blockbuster (40-/46PFL6606x/xx) sets have a dedicated method to open the bottom catches when removing the rear cover. Refer to Figure 4-4
and Figure 4-5 for details.
Figure 4-4 Bottom catches 40" and 46" Blockbuster sets -1-
Warning: Disconnect the mains power cord before you remove
the rear cover. Note: it is not necessary to remove the stand while removing the rear cover.
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Figure 4-5 Bottom catches 40" and 46" Blockbuster sets -2-
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It is advised to lay the set with front facing down before executing this operation.
1. Remove all screws from the rear cover.
2. Use a round rod (diameter 2 mm) and insert it in one of the holes [1].
3. Push the catch located inside the rear cover away by inserting the rod [2] through the hole and lifting the rear cover at the same time.
4. Repeat the same procedure on the other hole.
Mechanical Instructions
1. Unplug all connectors [1].
2. Remove the fixation screws [2].
3. Take the board out. When defective, replace the whole unit.
EN 13Q552.2E LA 4.
Figure 4-7 Main Power Supply

4.3.2 Speakers

Tweeters
Each tweeter unit is mounted with one screw. When defective, replace the whole unit.
Subwoofer
The central subwoofer is located in the centre of the set and is secured by two bosses. When defective, replace the whole unit.

4.3.3 Mains Switch

Refer to Figure 4-6
for details.

4.3.5 Small Signal Board (SSB)

Refer to Figure 4-8
for details.
Figure 4-8 SSB
1. Unplug all connectors [1].
2. Remove the fixation screws [2].
3. Take the board out.
Figure 4-6 Mains switch
When remounting, ensure that the side shielding [3] is positioned correctly.
The mains switch is mounted on a plastic subframe and can be removed without removing the subframe.
1. Use a screwdriver and push the switch out of its casing [1].
2. Unplug the connectors [2].
When defective, replace the whole unit.

4.3.4 Main Power Supply

Refer to Figure 4-7
for details.
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Mechanical Instructions

4.3.6 Keyboard Control, IR & LED Board

Refer to Figure 4-9
and Figure 4-10 for details.
Figure 4-9 Keyboard control, IR & LED board [1/2]

4.3.7 Ambilight Units

The Ambilight units can be lifted from the subframes without the use of tools. Refer to Figure 4-11
for details.
Figure 4-11 Ambilight units
1. Unplug the connector [1].
2. Carefully lift the board [2] and take the board out. When defective, replace the whole unit.
2
2 2
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Figure 4-10 Keyboard control, IR & LED board [2/2]
1. Remove the stand and the plastic support [1].
2. Unplug the connector [2].
3. Remove the screws [3] and take the board out. When defective, replace the whole unit.
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4.3.8 LCD Panel

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Refer to Figure 4-12
and Figure 4-13 for details.
Figure 4-12 LCD panel [1/2]
1. Remove the SSB as described earlier.
2. Remove the PSU as described earlier.
3. Remove the tweeters with their subframes and subwoofer as described earlier.
4. Remove the stand and -support as described earlier.
5. Remove the cables [1].
6. Remove the stand subframe [2].
7. Remove the mains switch subframe [3].
8. Remove the Ambilight units together with their subframes as described earlier.
9. Unplug the connector from the keyboard control-, and IR & LED board as described earlier.
10. Remove all remaining cables and subframes.
11. Use a screwdriver to release the clamps [4] that secure the panel and take the panel out.
Remove the clamps from the panel before sending the panel in for Service.
Figure 4-13 LCD panel [2/2]
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4.4 Set Re-assembly

To re-assemble the whole set, execute all processes in reverse order.
Notes:
While re-assembling, make sure that all cables are placed and connected in their original position.
Pay special attention not to damage the EMC foams in the set. Ensure that EMC foams are mounted correctly.
Mechanical Instructions
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Service Modes, Error Codes, and Fault Finding
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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 difficult to measure waveforms with a standard oscilloscope. However, several key ICs are capable of generating test patterns, which can be controlled via ComPair. In this way it is possible to determine which part is defective.
Perform measurements under the following conditions:
Service Default Mode.
Video: Colour bar signal.
Audio: 3 kHz left, 1 kHz right.
5.2 Service Modes
Service Default mode (SDM) and Service Alignment Mode (SAM) offers several features for the service technician, while the Customer Service Mode (CSM) is used for communication between the call centre and the customer.
All service-unfriendly modes (if present) are disabled, like: – (Sleep) timer. – Child/parental lock. – Picture mute (blue mute or black mute). – Automatic volume levelling (AVL). – Skip/blank of non-favourite pre-sets.
How to Activate SDM
For this chassis there are two kinds of SDM: an analogue SDM and a digital SDM. Tuning will happen according Table 5-1
Analogue SDM: use the standard RC-transmitter and key in the code “062596”, directly followed by the “MENU” (or “HOME”) button. Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” (or "HOME") button again. Analogue SDM can also be activated by grounding for a moment the solder path on the SSB, with the indication “SDM” (see Service mode pad
Digital SDM: use the standard RC-transmitter and key in the code “062593”, directly followed by the “MENU” (or "HOME") button. Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” (or "HOME") button again.
).
.
This chassis also offers the option of using ComPair, a hardware interface between a computer and the TV chassis. It offers the abilities of structured troubleshooting, error code reading, and software version read-out for all chassis. (see also section “5.4.1 ComPair
Note: For the new model range, a new remote control (RC) is used with some renamed buttons. This has an impact on the activation of the Service modes. For instance the old “MENU” button is now called “HOME” (or is indicated by a “house” icon).

5.2.1 Service Default Mode (SDM)

Purpose
To create a pre-defined setting, to get the same measurement results as given in this manual.
To override SW protections detected by stand-by processor and make the TV start up to the step just before protection (a sort of automatic stepwise start-up). See section “5.3 Stepwise Start-up
To start the blinking LED procedure where only LAYER 2 errors are displayed. (see also section “5.5 Error Codes
Specifications
Table 5-1 SDM default settings
Region Freq. (MHz)
Europe, AP(PAL/Multi) 475.25 PAL B/G
Europe, AP DVB-T 546.00 PID
All picture settings at 50% (brightness, colour, contrast).
Sound volume at 25%.
”).
”.
Video: 0B 06 PID PCR: 0B 06 PID Audio: 0B 07
Default system
DVB-T
”).
Figure 5-1 Service mode pad
After activating this mode, “SDM” will appear in the upper right corner of the screen (when a picture is available).
How to Navigate
When the “MENU” (or “HOME”) button is pressed on the RC transmitter, the TV set will toggle between the SDM and the normal user menu.
How to Exit SDM
Use one of the following methods:
Switch the set to STAND-BY via the RC-transmitter.
Via a standard customer RC-transmitter: key in “00”­sequence.

5.2.2 Service Alignment Mode (SAM)

Purpose
To perform (software) alignments.
To change option settings.
To easily identify the used software version.
To view operation hours.
To display (or clear) the error code buffer.
How to Activate SAM
Via a standard RC transmitter: Key in the code “062596” directly followed by the “INFO” or “OK” button. After activating SAM with this method a service warning will appear on the screen, continue by pressing the “OK” button on the RC.
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090819
PHILIPS
MODEL:
32PF9968/10
PROD.SERIAL NO:
AG 1A0620 000001
040
39mm
27mm
(CTN Sticker)
Display Option
Code
Contents of SAM
Hardware Info.
Operation Hours. Displays the accumulated total of
Errors (followed by maximum 10 errors). The most recent
Reset Error Buffer. When “cursor right” (or “OK” button)
Alignments. This will activate the “ALIGNMENTS” sub-
Dealer Options. Extra features for the dealers.
Options. Extra features for Service. For more info
Initialize NVM. The moment the processor recognizes a
Note: When the NVM is corrupted, or replaced, there is a high possibility that no picture appears because the display code is not correct. So, before initializing the NVM via the SAM, a picture is necessary and therefore the correct display option has to be entered. Refer to Chapter 6. Alignments To adapt this option, it’s advised to use ComPair (the correct values for the options can be found in Chapter 6. Alignments or a method via a standard RC (described below). Changing the display option via a standard RC: Key in the code “062598” directly followed by the “MENU” (or "HOME") button and “XXX” (where XXX is the 3 digit decimal display code as mentioned on the sticker in the set). Make sure to key in all three digits, also the leading zero’s. If the above action is successful, the front LED will go out as an indication that the RC sequence was correct. After the display option is changed in the NVM, the TV will go to the Stand-by mode. If the NVM was corrupted or empty before this action, it will be initialized first (loaded with default values). This initializing can take up to 20 seconds.
How to Navigate
In SAM, the menu items can be selected with the
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Service Modes, Error Codes, and Fault Finding
A. SW Version. Displays the software version of the
main software (example: Q555X-1.2.3.4 = AAAAB_X.Y.W.Z).
AAAA= the chassis name.
B= the SW branch version. This is a sequential number (this is no longer the region indication, as the software is now multi-region).
X.Y.W.Z= the software version, where X is the main version number (different numbers are not compatible with one another) and Y.W.Z is the sub version number (a higher number is always compatible with a lower number).
B. STBY PROC Version. Displays the software
version of the stand-by processor.
C. Production Code. Displays the production code of
the TV, this is the serial number as printed on the back of the TV set. Note that if an NVM is replaced or is initialized after corruption, this production code has to be re-written to NVM. ComPair will foresee in a possibility to do this.
operation hours (not the stand-by hours). Every time the TV is switched “on/off”, 0.5 hours is added to this number.
error is displayed at the upper left (for an error explanation see section “5.5 Error Codes
pressed here, followed by the “OK” button, the error buffer is reset.
menu. See Chapter 6. Alignments
regarding option codes, see chapter 6. Alignments Note that if the option code numbers are changed, these have to be confirmed with pressing the “OK” button before the options are stored, otherwise changes will be lost.
corrupted NVM, the “initialize NVM” line will be highlighted. Now, two things can be done (dependent of the service instructions at that moment): – Save the content of the NVM via ComPair for
development analysis, before initializing. This will give the Service department an extra possibility for diagnosis (e.g. when Development asks for this).
– Initialize the NVM.
”).
.
.
for details.
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Figure 5-2 Location of Display Option Code sticker
Store - go right. All options and alignments are stored when pressing “cursor right” (or the “OK” button) and then the “OK”-button.
Operation hours display. Displays the accumulated total of operation hours of the screen itself. In case of a display replacement, reset to “0” or to the consumed operation hours of the spare display.
SW Maintenance.SW Events. In case of specific software problems, the
development department can ask for this info.
HW Events. In case of specific software problems, the
development department can ask for this info :
- Event 26: refers to a power dip, this is logged after the TV set reboots due to a power dip.
- Event 17: refers to the power OK status, sensed even before the 3 x retry to generate the error code.
Test settings. For development purposes only.
Development file versions. Not useful for Service purposes, this information is only used by the development department.
Upload to USB. To upload several settings from the TV to an USB stick, which is connected to the SSB. The items are “Channel list”, “Personal settings”, “Option codes”, “Alignments”, “Identification data” (includes the set type and prod code + all 12NC like SSB, display, boards), “History list”. The “All” item supports to upload all several items at once.
First a directory “repair\” has to be created in the root of the USB stick.
To upload the settings, select each item separately, press “cursor right” (or the “OK” button), confirm with “OK” and wait until the message “Done” appears. In case the download to the USB stick was not successful, “Failure” will be displayed. In this case, check if the USB stick is connected properly and if the directory “repair” is present in the root of the USB stick. Now the settings are stored onto the USB stick and can be used to download into another TV or other SSB. Uploading is of course only possible if the software is running and preferably a picture is available. This method is created to be able to save the customer’s TV settings and to store them into another SSB.
Download from USB. To download several settings from the USB stick to the TV, same way of working needs to be followed as described in “Upload to USB”. To make sure that the download of the channel list from USB to the TV is executed properly, it is necessary to restart the TV and tune to a valid preset if necessary. The “All” item supports to download all several items at once.
NVM editor. For NET TV the set “type number” must be entered correctly. Also the production code (AG code) can be entered here via the RC-transmitter. Correct data can be found on the side/rear sticker.
“CURSOR UP/DOWN” key on the RC-transmitter. The selected item will be highlighted. When not all menu items
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fit on the screen, move the “CURSOR UP/DOWN” key to display the next/previous menu items.
With the “CURSOR LEFT/RIGHT” keys, it is possible to: – (De) activate the selected menu item. – (De) activate the selected sub menu.
With the “OK” key, it is possible to activate the selected action.
How to Exit SAM
Use one of the following methods:
Switch the TV set to STAND-BY via the RC-transmitter.
Via a standard RC-transmitter, key in “00” sequence, or select the “BACK” key.

5.2.3 Customer Service Mode (CSM)

Purpose
When a customer is having problems with his TV-set, he can call his dealer or the Customer Helpdesk. The service technician can then ask the customer to activate the CSM, in order to identify the status of the set. Now, the service technician can judge the severity of the complaint. In many cases, he can advise the customer how to solve the problem, or he can decide if it is necessary to visit the customer. The CSM is a read only mode; therefore, modifications in this mode are not possible.
When in this chassis CSM is activated, a test pattern will be displayed during 5 seconds (1 second Blue, 1 second Green and 1 second Red, then again 1 second Blue and 1 second Green). This test pattern is generated by the PNX51X0 (located on the 200Hz board as part of the display). So if this test pattern is shown, it could be determined that the back end video chain (PNX51X0 and display) is working.For TV sets without the PNX51X0 inside, every menu from CSM will be used as check for the back end chain video.
When CSM is activated and there is a USB stick connected to the TV set, the software will dump the CSM content to the USB stick. The file (CSM_model number_serial number.txt) will be saved in the root of the USB stick. This info can be handy if no information is displayed.
When in CSM mode (and a USB stick connected), pressing “OK” will create an extended CSM dump file on the USB stick. This file (Extended_CSM_model number_serial number.txt) contains:
The normal CSM dump information,
All items (from SAM “load to USB”, but in readable format),
Operating hours,
Error codes,
SW/HW event logs.
To have fast feedback from the field, a flashdump can be requested by development. When in CSM, push the “red” button and key in serial digits ‘2679’ (same keys to form the word ‘COPY’ with a cellphone). A file “Dump_model number_serial number.bin” will be written on the connected USB device. This can take 1/2 minute, depending on the quantity of data that needs to be dumped.
Also when CSM is activated, the LAYER 1 error is displayed via blinking LED. Only the latest error is displayed (see also section 5.5 Error Codes
).
How to Activate CSM
Key in the code “123654” via the standard RC transmitter. Note: Activation of the CSM is only possible if there is no (user) menu on the screen!
How to Navigate
By means of the “CURSOR-DOWN/UP” knob on the RC­transmitter, can be navigated through the menus.
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Contents of CSM
The contents are reduced to 3 pages: General, Software versions and Quality items. The group names itself are not shown anywhere in the CSM menu.
General
Set Type. This information is very helpful for a helpdesk/ workshop as reference for further diagnosis. In this way, it is not necessary for the customer to look at the rear of the TV-set. Note that if an NVM is replaced or is initialized after corruption, this set type has to be re-written to NVM. ComPair will foresee in a possibility to do this. The update can also be done via the NVM editor available in SAM.
Production Code. Displays the production code (the serial number) of the TV. Note that if an NVM is replaced or is initialized after corruption, this production code has to be re-written to NVM. ComPair will foresee in a possibility to do this. The update can also be done via the NVM editor available in SAM.
Installed date. Indicates the date of the first installation of the TV. This date is acquired via time extraction.
Options 1. Gives the option codes of option group 1 as set in SAM (Service Alignment Mode).
Options 2. Gives the option codes of option group 2 as set in SAM (Service Alignment Mode).
12NC SSB. Gives an identification of the SSB as stored in NVM. Note that if an NVM is replaced or is initialized after corruption, this identification number has to be re-written to NVM. ComPair will foresee in a possibility to do this. This identification number is the 12nc number of the SSB.
12NC display. Shows the 12NC of the display.
12NC supply. Shows the 12NC of the power supply.
12NC 200Hz board. Shows the 12NC of the 200Hz Panel (when present).
12NC AV PIP. Shows the 12NC of the AV PIP board (when present).
Software versions
Current main SW. Displays the build-in main software version. In case of field problems related to software, software can be upgraded. As this software is consumer upgradeable, it will also be published on the Internet. Example: Q55xx1.2.3.4
Stand-by SW. Displays the build-in stand-by processor software version. Upgrading this software will be possible via ComPair or via USB (see section 5.9 Software
Upgrading).
Example: STDBY_83.84.0.0.
e-UM version. Displays the electronic user manual SW­version (12NC version number). Most significant number here is the last digit.
AV PIP software.
3D dongle software version.
Quality items
Signal quality. Bad / average /good (not for DVB-S).
Ethernet MAC address. Displays the MAC address present in the SSB.
Wireless MAC address. Displays the wireless MAC address to support the Wi-Fi functionality.
BDS key. Indicates if the set is in the BDS status.
CI module. Displays status if the common interface module is detected.
CI + protected service. Yes/No.
Event counter : S : 000X 0000(number of software recoveries : SW EVENT-LOG #(reboots) S : 0000 000X (number of software events : SW EVENT­LOG #(events) H : 000X 0000(number of hardware errors) H : 0000 000X (number of hardware events : SW EVENT­LOG #(events).
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Semi St by
St by
Mains
on
Mains
off
GoToProtection
-WakeUp requested
-Acquisition needed
-Tact switch pushed
- stby requested and no data Acquisition required
- St by requested
-tact SW pushed
WakeUp
requested
Protection
WakeUp
requested
(SDM)
GoToProtection
Hibernate
-Tact switch pushed
-last status is hibernate after mains ON
Tact switch
pushed
Service Modes, Error Codes, and Fault Finding
How to Exit CSM
Press “MENU” (or "HOME") / “Back” key on the RC-transmitter.

5.3 Stepwise Start-up

When the TV is in a protection state due to an error detected by stand-by software (error blinking is displayed) and SDM is activated via shortcutting the SDM solder path on the SSB, the TV starts up until it reaches the situation just before protection. So, this is a kind of automatic stepwise start-up. In combination with the start-up diagrams below, you can see which supplies are present at a certain moment. Caution: in case the start-up in this mode with a faulty FET 7U0X is done, you can destroy all IC’s supplied by the +1V8 and +1v1, due to overvoltage (12V
on XVX-line). It is recommended to measure first the FET 7U0X or others FET’s on shortcircuit before activating SDM via the service pads.
The abbreviations “SP” and “MP” in the figures stand for:
SP: protection or error detected by the Stand-by Processor.
MP: protection or error detected by the MIPS Main
Processor.

Figure 5-3 Transition diagram

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No
EJTAG probe
connected ?
No
Yes
Release AVC system reset
Feed warm boot script
Cold boot?
Yes
No
Set I²C slave address
of Standby µP to (A0h)
An EJTAG probe (e.g . WindPower ICE prob e) can be connected for Linux Kernel debugging purposes.
Detect EJTAG debug probe
(pulling pin of the probe interface to
ground by inserting EJTAG probe)
Release AVC system reset
Feed cold boot script
Release AVC system reset Feed initializing boot script
disable alive mechanism
Off
Standby Supply starts running.
All standby supply voltages become available.
st-by µP resets
Stand by or
Protection
Mains is applied
- Switch Audio-Reset high.
It is low in the standby mode if the standby
mode lasted longer than 10s.
start keyboard scanning, RC detection. Wake up reasons are
off.
If the protection state was left by short c ircuiting the
SDM pins, detection of a protection condition during
startup will stall the startup. Protection conditions in a
playing set will be ignored. The protection mode will
not be entered.
Detect2 is moved to an interrupt. To be checked if the detection on interrupt base is feasible or not or if we should stick to the standard 40ms interval.
+12V, +24Vs, AL and Bolt-on power
isswitched on, followed by the +1V2 DCDC converter
Enable the supply detection algorithm
Switch ON Platform and display supply by switching
LOW the Standby line.
Initialise I/O pins of the st-by µP:
- Switch reset-AVC LOW (reset state)
- Switch reset-system LOW (reset state)
- Switch reset-Ethernet LOW (reset state)
- Switch reset-USB LOW (reset state)
- Switch reset-DVBs LOW (reset state)
-keep Audio-reset and Audio-Mute-Up HIGH
Enable the DCDC converters
(ENABLE-3V3n LOW)
No
Detect2 high received
within 2 seconds?
12V error :
Layer1: 3
Layer2: 16
Enter protection
Yes
Wait 50ms
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Figure 5-4 “Off” to “Semi Stand-by” flowchart (part 1)

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18770_252_100216.eps
100216
Yes
MIPS reads the wake up reason
from standby µP.
Semi-Standby
initialize tuner and channel decoders
Initialize video processing IC’s
Initialize source selection
initialize AutoTV by triggering CHS AutoTV Init interface
3-th try?
No
Blink Code as
error code
Bootscript ready
in 1250 ms?
Yes
No
Enable Alive check mechanism
Wait until AVC starts to
communicate
SW initialization
succeeded
within 20s?
No
Switch StandbyI/O line high
and wait 4 seconds
RPC start (comm. protocol)
Set I²C slave address
of Standby µP to (60h)
Yes
Disable all supply related protections and
switch off the +3V3 +5V DC/DC converter.
switch off the remaining DC/DC
converters
Wait 5ms
Switch AVC PNX85500 in
reset (active low)
Wait 10ms
Flash to Ram
image transfer succeeded
within 30s?
No
Yes
Code =
Layer1: 2
Layer2: 53
Code =
Layer1: 2
Layer2: 15
Initialize Ambilight with Lights off.
Timing need to be updated if more mature info is available.
Timing needs to be updated if more mature info is available.
Timing needs to be updated if more mature info is available.
Initialize audio
Enter protection
Reset-system is switched HIGH by the
AVC at the end of t he bootscript
AVC releases Reset-Ether net, Reset-USB and
Reset-DVBs when the end of the AVC boot-
script is detected
This cannot be done through the bootscript, the I/O is on the standby µP
Reset-Audio and Audio-Mute-Up are
switched by MIPS code later on in the
startup process
Reset-system is switched HIGH by the
AVC at the end of the bootscript
Reset-Audio and Audio-Mute-Up a re
switched by MIPS code later on in the
startup process
Wake up reason
coldboot & not semi-
standby?
85500 sends out startup screen
Startup screen cfg file
present?
85500 starts up the display.
Startup screen visible
yes
yes
To keep this flowchart readable, the exact display turn on description is not copied here. Please see the Semi-standby to On description for the detailed display startup
sequence.
During the complete display time of the Startup screen, the preheat condition of
100% PWM is valid.
No
No
Startup screen shall only be visible when there is a coldboot to an active state end situation. The startup screen shall not be visible when waking up for reboot reasons or waking up to semi- standby conditions or waking up to enter Hibernate mode..
The first time after the option turn on of the startup screen or when the set is virgin, the cfg file is not present and hence the startup screen will not be shown.
AVC releases Reset-Ethernet, Reset-USB and
Reset-DVBs when the end of the AVC boot-
script is detected
200Hz set?
No
yes
85500 sends out startup screen
200Hz Tcon has started up the
display.
Startup screen visible
85500 requests Lamp on
Service Modes, Error Codes, and Fault Finding
2011-Feb-18

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

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Service Modes, Error Codes, and Fault Finding
18770_253_100216.eps
100216
Active
Semi Standby
Initialize audio and video
processing IC's and functions
according needed use case.
Assert RGB video blanking
and audio mute
Wait until previous on-state is left more than2
secondsago. (to prevent LCD display problems)
The assumption here is that a fast toggle (<2s) can
only happen during ON->SEMI ->ON. In these states,
the AVC is still active and can provide the 2s delay. A
transition ON->SEMI->STBY->SEMI->ON cannot be
made in less than 2s, because the standby state will
be maintained for at least 4s.
Switch Audio-Reset low and wait 5ms
Constraints taken into account:
-Display may only be started when valid LVDS output clock can be delivered by the AVC.
-To have a reliable operation of the EEFL backlight, the backlight should be driven with a maximum PWM duty cycle during the first seconds. Only after this first one or two seconds, the PWM may be set to the required output level (Note that the PWM output should be present b
efore the backlight is switched on). To minimize the artefacts,
the picture should only be unblanked after these first seconds.
Restore dimming backlight feature, PWM and BOOST output
and unblank the video.
Wait until valid and stable audio and video, corresponding to the
requested output is delivered by the AVC
AND
the backlight has been switched on for at least the time which is
indicated in the display file as preheat time.
The higher level requirement is that audio and video should be demuted without transient effects and that the audio should be demuted maximum 1s before or
at the same time as the unblanking of the video.
Release audio mute and wait 100ms before any other audio
handling is done (e.g. volume change)
CPipe already generates a valid output clock in the semi-standby state: display
startup can start immediately when leaving
the semi-standby state.
Switch on LCD backlight (Lamp-ON)
Switch off the dimming backlight feature, set
the BOOST control to nominal and make sure PWM output is set to maximum allowed PWM
Switch on the Ambilight functionality according the last status
settings.
Delay Lamp-on with the sum of the LVDS delay and
the Lamp delay indicated in the display file
Switch on the displaypowerby
switching LCD-PWR-ON low
Wait x ms
Switch on LVDS output in the 85500
No
The exact timings to
switch on the
display(LVDS
delay, lamp delay)
are defined in the
display file.
Start POK line
detection algorithm
return
Display already on?
(splash screen)
Yes
Display cfg file present
and up to date, according
correct display option?
Startup screen Option and Installation setting
Photoscreen ON?
Yes
No
Prepare Start screen Display config
file and copy to Flash
No
Yes
A LED set does not normally need a
preheat time. The preheat remains present
but is set to zero in the display file.
EN 23Q552.2E LA 5.

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

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2011-Feb-18
EN 24 Q552.2E LA5.
18770_254_100216.eps
100216
Active
Semi Standby
Initialize audio and video
processing IC's and functions
according needed use case.
Assert RGB video blanking
and audio mute
Wait until previous on-state is left more than2
secondsago. (to prevent LCD display problems)
The assumption here is that a fast toggle (<2s)
can only happen during ON->SEMI ->ON. In
these states, the AVC is still active and can provide the 2s delay. If the transition ON->SEMI- >STBY->SEMI->ON can be made in less than 2s,
we have to delay the semi -> stby transition until
the requirement is met.
Switch Audio-Reset low and wait 5ms
unblank the video.
Wait until valid and stable audio and video, corresponding to
the requested output is delivered by the AVC.
The higher level requirement is that audio and
video should be demuted without transient
effects and that the audio should be demuted
maximum 1s before or at the same time as the
unblanking of the video.
Release audio mute and wait 100ms before any other audio
handling is done (e.g. volume change)
Request Tcon to Switch on the backlight in a
direct LED or
set Lamp-on I/O line in case of a side LED
Switch on the Ambilight functionality according the last status
settings.
There is no need to define the
display timings since the timing
implementation is part of the Tcon.
Start POK line
detection algorithm
return
Display cfg file present
and up to date, according
correct display option?
Startup screen Option
and Installation setting
Photoscreen ON?
Yes
No
Prepare Start screen Display config
file and copy to Flash
No
Yes
Backlight already on?
(splash screen)
No
Yes
Service Modes, Error Codes, and Fault Finding

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

2011-Feb-18
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Service Modes, Error Codes, and Fault Finding
18770_255_100216.eps
100216
Semi Standby
Active
Wait x ms (display file)
Mute all sound outputs via softmute
Mute all video outputs
switch off LCD backlight
(I/O or I²C)
Force ext audio outputs to ground
(I/O: audio reset)
And wait 5ms
switch off Ambilight
Set main amplifier mute (I/O: audio-mute)
Wait 100ms
Wait until Ambilight has faded out: Output power
Observer should be zero
Switch off the displaypowerby
switching LCD-PWR-ON high
Wait x ms
Switch off LVDS output in 85500
The exact timings to
switch off the
display(LVDS
delay, lamp delay)
are defined in the
display file.
Switch off POK line detection algorithm
200Hz set?
No
Yes
Instruct 200Hz
Tcon to turn off
the display
EN 25Q552.2E LA 5.

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

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2011-Feb-18
EN 26 Q552.2E LA5.
18770_256_100216.eps
100216
transfer Wake up reasons to the Stand by µP.
Stand by
Semi Stand by
Disable all supply related protections and switch off
the DC/DC converters (ENABLE-3V3n)
Switch OFF all supplies by switching HIGH the
Standby I/O line
Switch AVC system in reset state (reset-system and
reset-AVC lines)
Switch reset-USB, Reset-Ethernet and Reset-DVBs
LOW
Important remarks:
release reset audio 10 sec after entering
standby to save power
Also here, the standby state has to be
maintained for at least 4s before starting
another state transition.
Wait 5ms
Wait 10ms
Delay transition until ramping down of ambient light is
finished. *)
If ambientlight functionality was used in semi-standby (lampadaire mode), switch off ambient light (see CHS
ambilight)
*) If this is not performed and the set is switched to standby when the switch off of the ambilights is still ongoing, the lights will switch off abruptly when the supply is cut.
Switch Memories to self-refresh (this creates a more
stable condition when switching off the power).
Service Modes, Error Codes, and Fault Finding
2011-Feb-18

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

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Service Modes, Error Codes, and Fault Finding
10000_036_090121.eps
091118
TO
UART SERVICE
CONNECTOR
TO
UART SERVICE
CONNECTOR
TO I2C SERVICE CONNECTOR
TO TV
PC
HDMI I
2
C only
Optional power
5V DC
ComPair II Developed by Philips Brugge
RC out
RC in
Optional
Switch
Power ModeLink/
Activity
I
2
C
ComPair II
Multi
function
RS232 /UART
EN 27Q552.2E LA 5.

5.4 Service Tools

5.4.1 ComPair

Introduction
ComPair (Computer Aided Repair) is a Service tool for Philips Consumer Electronics products. and offers the following:
1. ComPair helps to quickly get an understanding on how to
2. ComPair allows very detailed diagnostics and is therefore
3. ComPair speeds up the repair time since it can
4. ComPair features TV software up possibilities.
Specifications
ComPair consists of a Windows based fault finding program and an interface box between PC and the (defective) product. The ComPair II interface box is connected to the PC via an USB cable. For the TV chassis, the ComPair interface box and the TV communicate via a bi-directional cable via the service connector(s). The ComPair fault finding program is able to determine the problem of the defective television, by a combination of automatic diagnostics and an interactive question/answer procedure.
How to Connect
This is described in the chassis fault finding database in ComPair.
Caution: It is compulsory to connect the TV to the PC as shown in the picture above (with the ComPair interface in between), as the ComPair interface acts as a level shifter. If one connects the TV directly to the PC (via UART), ICs can be blown!
How to Order
ComPair II order codes:
ComPair II interface: 3122 785 91020.
Software is available via the Philips Service web portal.
ComPair UART interface cable for Q55x.x.
Note: When you encounter problems, contact your local support desk.
repair the chassis in a short and effective way.
capable of accurately indicating problem areas. No knowledge on I
2
C or UART commands is necessary,
because ComPair takes care of this.
automatically communicate with the chassis (when the µP is working) and all repair information is directly available.
Figure 5-10 ComPair II interface connection
(using 3.5 mm Mini Jack connector): 3138 188 75051.

5.5 Error Codes

5.5.1 Introduction

The error code buffer contains all detected errors since the last time the buffer was erased. The buffer is written from left to right, new errors are logged at the left side, and all other errors shift one position to the right. When an error occurs, it is added to the list of errors, provided the list is not full. When an error occurs and the error buffer is full, then the new error is not added, and the error buffer stays intact (history is maintained). To prevent that an occasional error stays in the list forever, the error is removed from the list after more than 50 hrs. of operation. When multiple errors occur (errors occurred within a short time span), there is a high probability that there is some relation between them.
New in this chassis is the way errors can be displayed:
If no errors are there, the LED should not blink at all in
CSM or SDM. No spacer must be displayed as well.
There is a simple blinking LED procedure for board level repair (home repair) so called LAYER 1 errors
next to the existing errors which are LAYER 2 errors (see
Table 5-2
– LAYER 1 errors are one digit errors. – LAYER 2 errors are 2 digit errors.
In protection mode. – From consumer mode: LAYER 1. – From SDM mode: LAYER 2.
Fatal errors, if I2C bus is blocked and the set reboots, CSM and SAM are not selectable. – From consumer mode: LAYER 1. – From SDM mode: LAYER 2.
In CSM mode. – When entering CSM: error LAYER 1 will be displayed
In SDM mode. – When SDM is entered via Remote Control code or the
Error display on screen. – In CSM no error codes are displayed on screen. – In SAM the complete error list is shown.
Basically there are three kinds of errors:
Errors detected by the Stand-by software which lead to protection. These errors will always lead to protection and an automatic start of the blinking LED LAYER 1 error. (see section “5.6 The Blinking LED Procedure
Errors detected by the Stand-by software which not lead to protection. In this case the front LED should blink the involved error. See also section “5.5 Error Codes
Error Buffer”. Note that it can take up several minutes
before the TV starts blinking the error (e.g. LAYER 1 error = 2, LAYER 2 error = 15 or 53).
Errors detected by main software (MIPS). In this case the error will be logged into the error buffer and can be read out via ComPair, via blinking LED method LAYER 1-2 error, or in case picture is visible, via SAM.

5.5.2 How to Read the Error Buffer

Use one of the following methods:
On screen via the SAM (only when a picture is visible). E.g.: – 00 00 00 00 00: No errors detected – 23 00 00 00 00: Error code 23 is the last and only
37 23 00 00 00: Error code 23 was first detected and
Note that no protection errors can be logged in the
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div. table
).
by blinking LED. Only the latest error is shown.
hardware pins, LAYER 2 is displayed via blinking LED.
detected error.
error code 37 is the last detected error.
error buffer.
”).
, 5.5.4
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EN 28 Q552.2E LA5.
Service Modes, Error Codes, and Fault Finding
Via the blinking LED procedure. See section 5.5.3 How to
Clear the Error Buffer.
•Via ComPair.

5.5.3 How to Clear the Error Buffer

Use one of the following methods:
By activation of the “RESET ERROR BUFFER” command in the SAM menu.
If the content of the error buffer has not changed for 50+ hours, it resets automatically.

5.5.4 Error Buffer

In case of non-intermittent faults, clear the error buffer before starting to repair (before clearing the buffer, write down the
Table 5-2 Error code overview
Description Layer 1 Layer 2
2
I
C3 2 13 MIPS E BL / EB SSB SSB
2
C2 2 14 MIPS E BL / EB SSB SSB
I
2
C4 2 18 MIPS E BL / EB SSB SSB
I
PNX doesn’t boot (HW cause) 2 15 Stby µP P BL PNX8550 SSB
12V 3 16 Stby µP P BL / Supply
Inverter or display supply 3 17 MIPS E EB / Supply
PNX51X0 2/9 21 MIPS E EB PNX51X0 200 Hz board
HDMI mux 2 23 MIPS E EB Sil9x87A SSB
I2C switch 2 24 MIPS E EB PCA9540 SSB
Channel dec DVB-S 2 28 MIPS E EB STV0903 SSB
Lnb controller 2 31 MIPS E EB LNBH23 SSB
Tuner 2 34 MIPS E EB DTT 71300 SSB
Main nvm 2 35 MIPS E EB STM24C64 SSB
Tuner DVB-S 2 36 MIPS E EB STV6110 SSB
T° sensor SSB/set 2 42 MIPS E EB LM 75 T° sensor
T° sensor LED driver/Tcon 7 42 MIPS E EB LM 75 T° sensor
PNX doesn’t boot (SW cause) 2 53 Stby µP P BL PNX8550 SSB
Display 5 64 MIPS E BL / EB Altera Display
Monitored by
content, as this history can give significant information). This to ensure that old error codes are no longer present. If possible, check the entire contents of the error buffer. In some situations, an error code is only the result of another error code and not the actual cause (e.g. a fault in the protection detection circuitry can also lead to a protection). There are several mechanisms of error detection:
Via error bits in the status registers of ICs.
Via polling on I/O pins going to the stand-by processor.
Via sensing of analog values on the stand-by processor or the PNX8550.
Via a “not acknowledge” of an I
Take notice that some errors need several minutes before they start blinking or before they will be logged. So in case of problems wait 2 minutes from start-up onwards, and then check if the front LED is blinking or if an error is logged.
Error/
Error Buffer/
Prot
Blinking LED Device Defective Board
2
C communication.
Extra Info
Rebooting. When a TV is constantly rebooting due to internal problems, most of the time no errors will be logged or blinked. This rebooting can be recognized via a ComPair interface and Hyperterminal (for Hyperterminal settings, see section “5.8 Fault Finding and Repair Tips
, 5.8.7
Logging). It’s shown that the loggings which are generated
by the main software keep continuing. In this case diagnose has to be done via ComPair.
Error 13 (I
2
C bus 3, SSB bus blocked). Current situation: when this error occurs, the TV will constantly reboot due to the blocked bus. The best way for further diagnosis here, is to use ComPair.
Error 14 (I
2
C bus 2, TV set bus blocked). Current situation: when this error occurs, the TV will constantly reboot due to the blocked bus. The best way for further diagnosis here, is to use ComPair.
Error 18 (I
2
C bus 4, Tuner bus blocked). In case this bus is blocked, short the “SDM” solder paths on the SSB during startup, LAYER error 2 = 18 will be blinked.
Error 15 (PNX8550 doesn’t boot). Indicates that the main processor was not able to read his bootscript. This error will point to a hardware problem around the PNX8550 (supplies not OK, PNX 8550 completely dead, I between PNX and Stand-by Processor broken, etc...). When error 15 occurs it is also possible that I blocked (NVM). I
2
C1 can be indicated in the schematics as
2
C link
2
C1 bus is
follows: SCL-UP-MIPS, SDA-UP-MIPS.
Other root causes for this error can be due to hardware problems regarding the DDR’s and the bootscript reading from the PNX8550.
Error 16 (12V). This voltage is made in the power supply and results in protection (LAYER 1 error = 3) in case of absence. When SDM is activated we see blinking LED LAYER 2 error = 16.
Error 17 (Invertor or Display Supply). Here the status of the “Power OK” is checked by software, no protection will occur during failure of the invertor or display supply (no picture), only error logging. LED blinking of LAYER 1 error = 3 in CSM, in SDM this gives LAYER 2 error = 17.
Error 21 (PNX51X0). When there is no I towards the PNX51X0 after start-up, LAYER 2 error = 21 will be logged and displayed via the blinking LED procedure if SDM is switched on. This device is located on the 200 Hz panel from the display.
Error 23 (HDMI). When there is no I towards the HDMI mux after start-up, LAYER 2 error = 23 will be logged and displayed via the blinking LED procedure if SDM is switched on.
Error 24 (I2C switch). When there is no I communication towards the I
2
C switch, LAYER 2 error = 24 will be logged and displayed via the blinking LED procedure when SDM is switched on. Remark: this only works for TV sets with an I
2
C controlled screen included.
Error 28 (Channel dec DVB-S). When there is no I communication towards the DVB-S channel decoder,
LAYER 2 error = 28 will be logged and displayed via the blinking LED procedure if SDM is switched on.
2
C communication
2
C communication
2
C
2
C
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Service Modes, Error Codes, and Fault Finding
EN 29Q552.2E LA 5.
Error 31 (Lnb controller). When there is no I2C communication towards this device, LAYER 2 error = 31 will be logged and displayed via the blinking LED procedure if SDM is activated.
Error 34 (Tuner). When there is no I
2
C communication towards the tuner during start-up, LAYER 2 error = 34 will be logged and displayed via the blinking LED procedure when SDM is switched on.
Error 35 (main NVM). When there is no I communication towards the main NVM during start-up, LAYER 2 error = 35 will be displayed via the blinking LED procedure when SDM is switched “on”. All service modes (CSM, SAM and SDM) are accessible during this failure, observed in the Uart logging as follows: "<< ERRO >>> PFPOW_.C: First Error (id19, Layer_1= 2 Layer_= 35)".
Error 36 (Tuner DVB-S). When there is no I communication towards the DVB-S tuner during start-up, LAYER 2 error = 36 will be logged and displayed via the blinking LED procedure when SDM is switched “on”.
Error 42 (Temp sensor). Only applicable for TV sets equipped with temperature devices.
Error 53. This error will indicate that the PNX8550 has read his bootscript (when this would have failed, error 15 would blink) but initialization was never completed because of hardware problems (NAND flash, ...) or software initialization problems. Possible cause could be that there is no valid software loaded (try to upgrade to the latest main software version). Note that it can take a few minutes before the TV starts blinking LAYER 1 error = 2 or in SDM, LAYER 2 error = 53.
Error 64. Only applicable for TV sets with an I screen.

5.6 The Blinking LED Procedure

5.6.1 Introduction

The blinking LED procedure can be split up into two situations:
Blinking LED procedure LAYER 1 error. In this case the error is automatically blinked when the TV is put in CSM. This will be only one digit error, namely the one that is referring to the defective board (see table “5-2 Error code
overview”) which causes the failure of the TV. This
approach will especially be used for home repair and call centres. The aim here is to have service diagnosis from a distance.
Blinking LED procedure LAYER 2 error. Via this procedure, the contents of the error buffer can be made visible via the front LED. In this case the error contains 2 digits (see table “5-2 Error code overview displayed when SDM (hardware pins) is activated. This is especially useful for fault finding and gives more details regarding the failure of the defective board.
Important remark:
For an empty error buffer, the LED should not blink at all in CSM or SDM. No spacer will be displayed.
2
C
2
C
2
C controlled
”) and will be
4. Six short blinks followed by a pause of 3 s
5. One long blink of 3 s to finish the sequence (spacer).
6. The sequence starts again.

5.6.2 How to Activate

Use one of the following methods:
Activate the CSM. The blinking front LED will show only the latest layer 1 error, this works in “normal operation” mode or automatically when the error/protection is monitored by the Stand-by processor. In case no picture is shown and there is no LED blinking, read the logging to detect whether “error devices” are mentioned. (see section “5.8 Fault Finding and Repair
Tips, 5.8.7 Logging”).
Activate the SDM. The blinking front LED will show the entire content of the LAYER 2 error buffer, this works in “normal operation” mode or when SDM (via hardware pins) is activated when the tv set is in protection.

5.7 Protections

5.7.1 Software Protections

Most of the protections and errors use either the stand-by microprocessor or the MIPS controller as detection device. Since in these cases, checking of observers, polling of ADCs, and filtering of input values are all heavily software based, these protections are referred to as software protections. There are several types of software related protections, solving a variety of fault conditions:
Related to supplies: presence of the +5V, +3V3 and 1V2 needs to be measured, no protection triggered here.
Protections related to breakdown of the safety check mechanism. E.g. since the protection detections are done by means of software, failing of the software will have to initiate a protection mode since safety cannot be guaranteed any more.
Remark on the Supply Errors
The detection of a supply dip or supply loss during the normal playing of the set does not lead to a protection, but to a cold reboot of the set. If the supply is still missing after the reboot, the TV will go to protection.
Protections during Start-up
During TV start-up, some voltages and IC observers are actively monitored to be able to optimise the start-up speed, and to assure good operation of all components. If these monitors do not respond in a defined way, this indicates a malfunction of the system and leads to a protection. As the observers are only used during start-up, they are described in the start-up flow in detail (see section “5.3 Stepwise Start-up

5.7.2 Hardware Protections

”).
When one of the blinking LED procedures is activated, the front LED will show (blink) the contents of the error buffer. Error codes greater then 10 are shown as follows:
1. “n” long blinks (where “n” = 1 to 9) indicating decimal digit
2. A pause of 1.5 s
3. “n” short blinks (where “n”= 1 to 9)
4. A pause of approximately 3 s,
5. When all the error codes are displayed, the sequence finishes with a LED blink of 3 s (spacer).
6. The sequence starts again.
Example: Error 12 8 6 0 0. After activation of the SDM, the front LED will show:
1. One long blink of 750 ms (which is an indication of the decimal digit) followed by a pause of 1.5 s
2. Two short blinks of 250 ms followed by a pause of 3 s
3. Eight short blinks followed by a pause of 3 s
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The only real hardware protection in this chassis appears in case of an audio problem e.g. DC voltage on the speakers. This protection will only affect the Class D audio amplifier (item 7D10; see diagram B03A) and puts the amplifier in a continuous burst mode (cyclus approximately 2 seconds).
Repair Tip
There still will be a picture available but no sound. While the Class D amplifier tries to start-up again, the cone of the loudspeakers will move slowly in one or the other direction until the initial failure shuts the amplifier down, this cyclus starts over and over again. The headphone amplifier will also behaves similar.
2011-Feb-18
EN 30 Q552.2E LA5.
Service Modes, Error Codes, and Fault Finding

5.8 Fault Finding and Repair Tips

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

5.8.1 Ambilight

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

5.8.2 Audio Amplifier

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

5.8.3 AV PIP

To check the AV PIP board (if present) functionality, a dedicated tespattern can be invoke as follows: select the “multiview” icon in the User Interface and press the “OK” button. Apply for the main picture an extended source, e.g. HDMI input. Proceed by entering CSM (push ‘123654’ on the remote control) and press the yellow button. A coloured testpattern should appear now, generated by the AV PIP board (this can take a few seconds).
+5V-TUN supply voltage (5V nominal) for tuner and IF amplifier.
+3V3-STANDY (3V3 nominal) is the permanent voltage, supplying the Stand-by microprocessor inside PNX855xx.
Supply voltage +1V1 is started immediately when +12V voltage becomes available (+12V is enabled by STANDBY signal when "low"). Supply voltages +3V3, +2V5, +1V8, +1V2 and +5V-TUN are switched "on" by signal ENABLE-3V3 when "low", provided that +12V (detected via 7U40 and 7U41) is present.
+12V is considered OK (=> DETECT2 signal becomes "high", +12V to +1V8, +12V to +3V3, +12V to +5V DC-DC converter can be started up) if it rises above 10V and doesn’t drop below 9V5. A small delay of a few milliseconds is introduced between the start-up of 12V to +1V8 DC-DC converter and the two other DC-DC converters via 7U48 and associated components.
Description DVB-S2:
LNB-RF1 (0V = disabled, 14V or 18V in normal operation) LNB supply generated via the second conversion channel of 7T03 followed by 7T50 LNB supply control IC. It provides supply voltage that feeds the outdoor satellite reception equipment.
+3V3-DVBS (3V3 nominal), +2V5-DVBS (2V5 nominal) and +1V-DVBS (1.03V nominal) power supply for the silicon tuner and channel decoder. +1V-DVBS is generated via a 5V to 1V DC-DC converter and is stabilized at the point of load (channel decoder) by means of feedback signal SENSE+1V0-DVBS. +3V3-DVBS and +2V5-DVBS are generated via linear stabilizers from +5V-DVBS that by itself is generated via the first conversion channel of 7T03.

5.8.4 CSM

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

5.8.5 DC/DC Converter

Description basic board
The basic board power supply consists of 4 DC/DC converters and 5 linear stabilizers. All DC/DC converters have +12V input voltage and deliver:
+1V1 supply voltage (1.15V nominal), for the core voltage of PNX855xx, stabilized close to the point of load; SENSE+1V1 signal provides the DC-DC converter the needed feedback to achieve this.
+1V8 supply voltage, for the DDR2 memories and DDR2 interface of PNX855xx.
+3V3 supply voltage (3.30V nominal), overall 3.3 V for onboard IC’s, for non-5000 series SSB diversities only.
+5V (5.15V nominal) for USB, WIFI and Conditional Access Module and +5V5-TUN for +5V-TUN tuner stabilizer.
The linear stabilizers are providing:
+1V2 supply voltage (1.2V nominal), stabilized close to PNX855xx device, for various other internal blocks of PNX855xx; SENSE+1V2 signal provides the needed feedback to achieve this.
+2V5 supply voltage (2.5V nominal) for LVDS interface and various other internal blocks of PNX855xx; for 5000 series SSB diversities the stabilizer is 7UD2 while for the other diversities 7UC0 is used.
+3V3 supply voltage (3V3 nominal) for 5000 series SSB diversities, provided by 7UD3; in this case the 12V to 3V3 DC-DC converter is not present.
At start-up, +24V becomes available when STANDBY signal is "low" (together with +12V for the basic board), when +3V3 from the basic board is present the two DC-DC converters channels inside 7T03 are activated. Initially only the 24V to 5V converter (channel 1 of 7T03 generating +5V-DVBS) will effectively work, while +V-LNB is held at a level around 11V7 via diode 6T55. After 7T05 is initialized, the second channel of 7T03 will start and generates a voltage higher then LNB-RF1 with 0V8. +5V­DVBS start-up will imply +3V3-DVBS start-up, with a small delay of a few milliseconds => +2V5-DVBS and +1V-DVBS will be enabled.
If +24V drops below +15V level then the DVB-S2 supply will stop, even if +3V3 is still present.
Debugging
The best way to find a failure in the DC/DC converters is to check their start-up sequence at power “on” via the mains cord, presuming that the stand-by microprocessor and the external supply are operational. Take STANDBY signal "high"-to-"low" transition as time reference. When +12V becomes available (maximum 1 second after STANDBY signal goes "low") then +1V1 is started immediately. After ENABLE-3V3 goes "low", all the other supply voltages should rise within a few milliseconds.
Tips
Behaviour comparison with a reference TV550 platform can be a fast way to locate failures.
If +12V stays "low", check the integrity of fuse 1U40.
Check the integrity (at least no short circuit between drain and source) of the power MOS-FETs before starting up the platform in SDM, otherwise many components might be damaged. Using a ohmmeter can detect short circuits between any power rail and ground or between +12V and any other power rail.
Short circuit at the output of an integrated linear stabilizer (7UC0, 7UD2 or 7UD3) will heat up this device strongly.
Switching frequencies should be 500 kHz ...600 kHz for 12 V to 1.1 V and 12 V to 1.8 V DC-DC converters,
2011-Feb-18
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