Copyright 2009 Koninklijke Electronics Philips 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.
(B01) 57-59104-105
Side Facing Side AV 26"(D) 106107
Side Facing Side AV 37" - 42"(D) 108109
Tuner Std: Chnl. Dec.(T01A) 110112
Tuner Std: Main Tuner(T01B) 111112
H_16770_000.eps
190207
Published by ER/CC 0970 BU TV Consumer CarePrinted in the NetherlandsSubject to modificationEN 3122 785 18740
2009-Oct-09
EN 2PB52.3HU LA1.
Revision List
1.Revision List
Manual xxxx xxx xxxx.0
•First release.
2.Technical Specifications and Connections
Index of this chapter:
2.1 Technical Specifications
2.2 Directions for Use
2.3 Connections
2.4 Chassis Overview
Notes:
•Figures can deviate due to the different set executions.
•Specifications are indicative (subject to change).
2.1Technical Specifications
For on-line product support please use the links in Table 2-1.
Here is product information available, as well as getting started,
user manuals, frequently asked questions and software &
drivers.
Table 2-1 Described Model numbers
CTNStylingPublished in:
26HFL5561H/27
32HFL5561H/27
42HFL5581H/27
ME73122 785 18740
P&S3122 785 18740
P&S3122 785 18740
2.2Directions for Use
You can download this information from the following websites:
6 - External Control Connector (RS232-UART) Out - In
11
12
13
14
1
6
10000_005_090121.eps
10
18730_001_090914.eps
5
9
090121
091002
1 - RJ12: SmartPort In/Out
1-SPI Clock TTL out k
2-SPI Data in TTL in j
3 - +5V Vcc j
4 - SPI Data out TTL out k
5 - GND Gnd H
6 - IR_data TTL out k
2 - Aerial - In
-- F-type (US) Coax, 75 ohm D
3 - AV1: Cinch: Video CVBS - In, Audio - In
Ye - Video CVBS 1 V
Wh - Audio L 0.5 V
Rd - Audio R 0.5 V
/ 75 ohm jq
PP
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
4 - CVI: Video YPbPr - In; Audio - In
Gn - Video Y 1 V
Bu - Video Pb 0.7 V
Rd - Video Pr 0.7 V
Rd - Audio - R 0.5 V
Wh - Audio - L 0.5 V
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
5 - Cinch: S/PDIF - Out
Bk - Coaxial 0.4 - 0.6 V
/ 75 ohm kq
PP
Figure 2-2 9-pin Sub-D Connector
1 - DCD Carrier Detect j
2 - RxD Receive j
3 - TxD Transmit k
4 - DTR Data Terminal Ready k
5 - Gnd Ground H
6 - DSR Data Set Ready j
7 - RTS Request To Send k
8 - CTS Clear To Send j
9 - RI Ring Indicator j
7 - VGA OUT: Video RGB - In, Out
1
5
6
11
10000_002_090121.eps
10
15
090127
Figure 2-3 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 jk
PP
/ 75 ohm jk
PP
/ 75 ohm jk
PP
5 - Ground Gnd H
6 - Ground Red Gnd H
7 - Ground Green Gnd H
8 - Ground Blue Gnd H
2009-Oct-09
EN 4PB52.3HU LA2.
Technical Specifications and Connections
9-+5VDC +5 V jk
10 - Ground Sync Gnd H
11 - n.c.
12 - DDC_SDA DDC data jk
13 - H-sync 0 - 5 V jk
14 - V-sync 0 - 5 V jk
15 - DDC_SCL DDC clock jk
8 - Mini Jack: Bathroom Speaker out
Bk - Audio - + 8 ohm j
Bk - Audio - - 8 ohm j
9 - Service Connector (UART)
1 - UART_TX Transmit k
2 - Ground Gnd H
3 - UART_RX Receive j
10 - HDMI 1, 2 & 3: Digital Video, Digital Audio - In
19
182
10000_017_090121.eps
1
090428
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
2.3.2Side Connections
11 - USB 2.0
1 2 3 4
10000_022_090121.eps
090121
Figure 2-5 USB (type A)
1. - +5V. . k
2. - Data (-). jk
3. - Data (+). jk
4. - Ground. Gnd. H
12 - Mini Jack: Audio Head phone - Out
Bk. - Head phone. 32 - 600 ohm / 10 mW. ot
13 - 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
PP
/ 10 kohm. jq
RMS
/ 10 kohm. jq
RMS
14 - 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
PP
/ 75 ohm. j
PP
2.4Chassis Overview
Refer to chapter Block Diagrams for PWB/CBA locations.
2009-Oct-09
Precautions, Notes, and Abbreviation List
3.Precautions, Notes, and Abbreviation List
EN 5PB52.3HU LA3.
Index of this chapter:
3.1 Safety Instructions
3.2 Warnings
3.3 Notes
3.4 Abbreviation List
3.1Safety Instructions
Safety regulations require the following during a repair:
•Connect the set to the Mains/AC Power via an isolation
transformer (> 800 VA).
•Replace safety components, indicated by the symbol h,
only by components identical to the original ones. Any
other component substitution (other than original type) may
increase risk of fire or electrical shock hazard. Of de set
ontploft!
Safety regulations require that after a repair, the set must be
returned in its original condition. Pay in particular attention to
the following points:
•Route the wire trees correctly and fix them with the
mounted cable clamps.
•Check the insulation of the Mains/AC Power lead for
external damage.
•Check the strain relief of the Mains/AC Power cord for
proper function.
•Check the electrical DC resistance between the Mains/AC
Power plug and the secondary side (only for sets that have
a Mains/AC Power isolated power supply):
1. Unplug the Mains/AC Power cord and connect a wire
between the two pins of the Mains/AC Power plug.
2. Set the Mains/AC Power switch to the “on” position
(keep the Mains/AC Power cord unplugged!).
3. Measure the resistance value between the pins of the
Mains/AC Power plug and the metal shielding of the
tuner or the aerial connection on the set. The reading
should be between 4.5 MΩ and 12 MΩ.
4. Switch “off” the set, and remove the wire between the
two pins of the Mains/AC Power plug.
•Check the cabinet for defects, to prevent touching of any
inner parts by the customer.
picture carrier at 475.25 MHz for PAL, or 61.25 MHz for
NTSC (channel 3).
•Where necessary, measure the waveforms and voltages
with (D) and without (E) aerial signal. Measure the
voltages in the power supply section both in normal
operation (G) and in stand-by (F). These values are
indicated by means of the appropriate symbols.
3.3.2Schematic Notes
•All resistor values are in ohms, and the value multiplier is
often used to indicate the decimal point location (e.g. 2K2
indicates 2.2 kΩ).
•Resistor values with no multiplier may be indicated with
either an “E” or an “R” (e.g. 220E or 220R indicates 220 Ω).
•All capacitor values are given in micro-farads (μ=× 10
nano-farads (n =× 10
•Capacitor values may also use the value multiplier as the
decimal point indication (e.g. 2p2 indicates 2.2 pF).
•An “asterisk” (*) indicates component usage varies. Refer
to the diversity tables for the correct values.
•The correct component values are listed on the Philips
Spare Parts Web Portal.
3.3.3Spare Parts
For the latest spare part overview, consult your Philips Spare
Part web portal.
3.3.4BGA (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
),
).
3.2Warnings
•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.
3.3Notes
3.3.1General
•Measure the voltages and waveforms with regard to the
chassis (= tuner) ground (H), or hot ground (I), depending
on the tested area of circuitry. The voltages and waveforms
shown in the diagrams are indicative. Measure them in the
Service Default Mode with a colour bar signal and stereo
sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and
3.3.5Lead-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.
2009-Oct-09
EN 6PB52.3HU LA3.
Precautions, Notes, and Abbreviation List
3.3.6Alternative BOM identification
It should be noted that on the European Service website,
“Alternative BOM” is referred to as “Design variant”.
The third digit in the serial number (example:
AG2B0335000001) indicates the number of the alternative
B.O.M. (Bill Of Materials) that has been used for producing the
specific TV set. In general, it is possible that the same TV
model on the market is produced with e.g. two different types
of displays, coming from two different suppliers. This will then
result in sets which have the same CTN (Commercial Type
Number; e.g. 28PW9515/12) but which have a different B.O.M.
number.
By looking at the third digit of the serial number, one can
identify which B.O.M. is used for the TV set he is working with.
If the third digit of the serial number contains the number “1”
(example: AG1B033500001), then the TV set has been
manufactured according to B.O.M. number 1. If the third digit is
a “2” (example: AG2B0335000001), then the set has been
produced according to B.O.M. no. 2. This is important for
ordering the correct spare parts!
For the third digit, the numbers 1...9 and the characters A...Z
can be used, so in total: 9 plus 26= 35 different B.O.M.s can be
indicated by the third digit of the serial number.
Identification: The bottom line of a type plate gives a 14-digit
serial number. Digits 1 and 2 refer to the production centre (e.g.
AG is Bruges), digit 3 refers to the B.O.M. code, digit 4 refers
to the Service version change code, digits 5 and 6 refer to the
production year, and digits 7 and 8 refer to production week (in
example below it is 2006 week 17). The 6 last digits contain the
serial number.
MODEL :
PROD.NO:
32PF9968/10
AG 1A0617 000001
MADE IN BELGIUM
220-240V 50/60Hz
~
VHF+S+H+UHF
BJ3.0E LA
S
10000_024_090121.eps
Figure 3-1 Serial number (example)
3.3.7Board 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!
3.3.8Practical 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
090121
3.4Abbreviation List
0/6/12SCART switch control signal on A/V
board. 0 = loop through (AUX to TV),
6 = play 16 : 9 format, 12 = play 4 : 3
format
AARAAutomatic Aspect Ratio Adaptation:
algorithm that adapts aspect ratio to
remove horizontal black bars; keeps
the original aspect ratio
ACIAutomatic Channel Installation:
algorithm that installs TV channels
directly from a cable network by
means of a predefined TXT page
ADCAnalogue to Digital Converter
AFCAutomatic Frequency Control: control
signal used to tune to the correct
frequency
AGCAutomatic Gain Control: algorithm that
controls the video input of the feature
box
AMAmplitude Modulation
APAsia Pacific
ARAspect Ratio: 4 by 3 or 16 by 9
ASFAuto Screen Fit: algorithm that adapts
aspect ratio to remove horizontal black
bars without discarding video
information
ATSCAdvanced Television Systems
Committee, the digital TV standard in
the USA
ATVSee Auto TV
Auto TVA hardware and software control
system that measures picture content,
and adapts image parameters in a
dynamic way
AVExternal Audio Video
AVCAudio Video Controller
AVIPAudio Video Input Processor
B/GMonochrome TV system. Sound
carrier distance is 5.5 MHz
BDSBusiness Display Solutions (iTV)
BLRBoard-Level Repair
BTSCBroadcast Television Standard
Committee. Multiplex FM stereo sound
system, originating from the USA and
used e.g. in LATAM and AP-NTSC
countries
B-TXTBlue TeleteXT
CCentre channel (audio)
CECConsumer Electronics Control bus:
remote control bus on HDMI
connections
CLConstant Level: audio output to
connect with an external amplifier
CLRComponent Level Repair
ComPairComputer aided rePair
CPConnected Planet / Copy Protection
CSMCustomer Service Mode
CTIColor Transient Improvement:
manipulates steepness of chroma
transients
CVBSComposite Video Blanking and
Synchronization
DACDigital to Analogue Converter
DBEDynamic Bass Enhancement: extra
low frequency amplification
DCMData Communication Module. Also
referred to as System Card or
Smartcard (for iTV).
DDCSee “E-DDC”
D/KMonochrome TV system. Sound
carrier distance is 6.5 MHz
DFIDynamic Frame Insertion
2009-Oct-09
Precautions, Notes, and Abbreviation List
EN 7PB52.3HU LA3.
DFUDirections For Use: owner's manual
DMRDigital Media Reader: card reader
DMSDDigital Multi Standard Decoding
DNMDigital Natural Motion
DNRDigital Noise Reduction: noise
reduction feature of the set
DRAMDynamic RAM
DRMDigital Rights Management
DSPDigital Signal Processing
DSTDealer Service Tool: special remote
control designed for service
technicians
DTCPDigital Transmission Content
Protection; A protocol for protecting
digital audio/video content that is
traversing a high speed serial bus,
such as IEEE-1394
DVB-CDigital Video Broadcast - Cable
DVB-TDigital Video Broadcast - Terrestrial
DVDDigital Versatile Disc
DVI(-d)Digital Visual Interface (d= digital only)
E-DDCEnhanced Display Data Channel
(VESA standard for communication
channel and display). Using E-DDC,
the video source can read the EDID
information form the display.
EDIDExtended Display Identification Data
(VESA standard)
EEPROMElectrically Erasable and
Programmable Read Only Memory
EMIElectro Magnetic Interference
EPGElectronic Program Guide
EPLDErasable Programmable Logic Device
EUEurope
EXTEXTernal (source), entering the set by
SCART or by cinches (jacks)
FDSFull Dual Screen (same as FDW)
FDWFull Dual Window (same as FDS)
FLASHFLASH memory
FMField Memory or Frequency
Modulation
FPGAField-Programmable Gate Array
FTVFlat TeleVision
Gb/sGiga bits per second
G-TXTGreen TeleteXT
HH_sync to the module
HDHigh Definition
HDDHard Disk Drive
HDCPHigh-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.
HDMIHigh Definition Multimedia Interface
HPHeadPhone
IMonochrome TV system. Sound
2
I
CInter IC bus
2
I
DInter IC Data bus
2
I
SInter IC Sound bus
carrier distance is 6.0 MHz
IFIntermediate Frequency
IRInfra Red
IRQInterrupt Request
ITU-656The ITU Radio communication Sector
(ITU-R) is a standards body
subcommittee of the International
Telecommunication Union relating to
radio communication. ITU-656 (a.k.a.
SDI), is a digitized video format used
for broadcast grade video.
Uncompressed digital component or
digital composite signals can be used.
The SDI signal is self-synchronizing,
uses 8 bit or 10 bit data words, and has
a maximum data rate of 270 Mbit/s,
with a minimum bandwidth of 135
MHz.
ITVInstitutional TeleVision; TV sets for
hotels, hospitals etc.
LSLast 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
LATAMLatin America
LCDLiquid Crystal Display
LEDLight 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
LPLLG.Philips LCD (supplier)
LSLoudspeaker
LVDSLow Voltage Differential Signalling
MbpsMega bits per second
M/NMonochrome TV system. Sound
carrier distance is 4.5 MHz
MHEGPart 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
MIPSMicroprocessor without Interlocked
Pipeline-Stages; A RISC-based
microprocessor
MOPMatrix Output Processor
MOSFETMetal Oxide Silicon Field Effect
Transistor, switching device
MPEGMotion Pictures Experts Group
MPIFMulti Platform InterFace
MUTEMUTE Line
MTVMainstream TV: TV-mode with
Consumer TV features enabled (iTV)
NCNot Connected
NICAMNear Instantaneous Compounded
Audio Multiplexing. This is a digital
sound system, mainly used in Europe.
NTCNegative Temperature Coefficient,
non-linear resistor
NTSCNational 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)
NVMNon-Volatile Memory: IC containing
TV related data such as alignments
O/COpen Circuit
OSDOn Screen Display
OADOver the Air Download. Method of
software upgrade via RF transmission.
Upgrade software is broadcasted in
TS with TV channels.
OTCOn screen display Teletext and
Control; also called Artistic (SAA5800)
P50Project 50: communication protocol
between TV and peripherals
PALPhase Alternating Line. Color system
conditioner)
PIPPicture In Picture
PLLPhase Locked Loop. Used for e.g.
FST tuning systems. The customer
can give directly the desired frequency
PODPoint Of Deployment: a removable
CAM module, implementing the CA
system for a host (e.g. a TV-set)
PORPower On Reset, signal to reset the uP
PTCPositive Temperature Coefficient,
non-linear resistor
PWBPrinted Wiring Board (same as “PCB”)
PWMPulse Width Modulation
QRCQuasi Resonant Converter
QTNRQuality Temporal Noise Reduction
QVCPQuality Video Composition Processor
RAMRandom Access Memory
RGBRed, Green, and Blue. The primary
color signals for TV. By mixing levels
of R, G, and B, all colors (Y/C) are
reproduced.
RCRemote Control
RC5 / RC6Signal protocol from the remote
control receiver
RESETRESET signal
ROMRead Only Memory
RSDSReduced Swing Differential Signalling
data interface
R-TXTRed TeleteXT
SAMService Alignment Mode
S/CShort Circuit
SCARTSyndicat des Constructeurs
d'Appareils Radiorécepteurs et
SCLSerial Clock I
Téléviseurs
SCL-FCLock Signal on Fast I
SDStandard Definition
SDASerial Data I
SDA-FDAta Signal on Fast I
2
C
2
C bus
2
C
2
C bus
SDISerial Digital Interface, see “ITU-656”
SDRAMSynchronous DRAM
SECAMSEequence Couleur Avec Mémoire.
Color system mainly used in France
and East Europe. Color carriers=
4.406250 MHz and 4.250000 MHz
SIFSound Intermediate Frequency
SMPSSwitched Mode Power Supply
SoCSystem on Chip
SOGSync On Green
SOPSSelf Oscillating Power Supply
SPISerial Peripheral Interface bus; a 4-
wire synchronous serial data link
standard
S/PDIFSony Philips Digital InterFace
SRAMStatic RAM
SRPService Reference Protocol
SSBSmall Signal Board
STBSet Top Box
STBYSTand-BY
SVGA800 × 600 (4:3)
SVHSSuper Video Home System
SWSoftware
SWANSpatial temporal Weighted Averaging
TSTransport Stream
TXTTeleteXT
TXT-DWDual Window with TeleteXT
UIUser Interface
uPMicroprocessor
UXGA1 600 × 1 200 (4:3)
VV-sync to the module
VESAVideo Electronics Standards
Association
VGA640 × 480 (4:3)
VLVariable Level out: processed audio
output toward external amplifier
VSBVestigial Side Band; modulation
method
WYSIWYRWhat You See Is What You Record:
record selection that follows main
picture and sound
WXGA1280 × 768 (15:9)
XTALQuartz crystal
XGA1024 × 768 (4:3)
YLuminance signal
Y/CLuminance (Y) and Chrominance (C)
signal
YPbPrComponent video. Luminance and
scaled color difference signals (B-Y
and R-Y)
YUVComponent video
2009-Oct-09
4.Mechanical Instructions
Mechanical Instructions
EN 9PB52.3HU LA4.
Index of this chapter:
4.1 Cable Dressing
4.2 Service Positions
4.3 Assy/Panel Removal
4.4 Set Re-assembly
Notes:
4.1Cable Dressing
•Disassembly instructions for the ME7 styling below are
based on the 32” model (chassis PB52.1HU LA), but is
comparable for all other models with the ME7 styling.
•Disassembly instructions for the PnS styling below are
based on the 37” model (chassis PB52.2HU LA), but is
comparable for all other models with the PnS styling.
•Figures below can deviate slightly from the actual situation,
due to the different set executions.
For easy servicing of this set, there are a few possibilities
created:
•The buffers from the packaging (see figure “Rear cover”).
•Foam bars (created for Service).
4.2.1Foam Bars
Required for sets
1
42"
10000_018_090121.eps
Figure 4-4 Foam bars
The foam bars (order code 3122 785 90580 for two pieces) can
be used for all types and sizes of Flat TVs. See figure “Foam
bars” for details. Sets with a display of 42" and larger, require
four foam bars [1]. Ensure that the foam bars are always
supporting the cabinet and never only the display.
Caution: Failure to follow these guidelines can seriously
damage the display!
By laying the TV face down on the (ESD protective) foam bars,
a stable situation is created to perform measurements and
alignments. By placing a mirror under the TV, you can monitor
the screen.
4.3Assy/Panel Removal
4.3.3IR & LED Board
1. Unplug the connectors that lead to the SSB and the Key
Board Control Panel.
2. Remove the screws.
3. Lift the board and take it out of the set.
When defective, replace the whole unit.
4.3.4Key Board Control Panel
1
090121
1. Unplug the key board connector from the IR & LED Board.
2. Release the clamp on the topside using a screwdriver.
3. Lift the unit and take it out of the set.
When defective, replace the whole unit.
4.3.5Main Supply Panel
1. Unplug the connectors.
2. Remove the fixation screws.
3. Take the board out.
When defective, replace the whole unit.
4.3.6Small Signal Board (SSB) and Tuner Bolt-on
Refer to next figures for details.
Caution: it is mandatory to remount all different screws at their
original position during re-assembly. Failure to do so may result
in damaging the SSB.
1. Unplug the LVDS connector [1].
Caution: be careful, as this is a very fragile connector! See
figure 4-5 SSB cover
2. Unplug the connectors [2].
3. Remove the screws [3] and remove the top shielding of the
SSB.
4. Remove the screws [4] that hold the subframe of the SSB.
The subframe can now be taken out of the set, together
with the SSB and tuner bolt-on.
5. To remove the tuner bolt-on, release the connectors [5]
and remove the cables.
6. Remove the screws [6] and lift the tuner bolt-on from the
SSB.
7. Remove the locknuts [7] and screws [8] from the SSB
connector plate and take the SSB from the subframe.
.
3
3
2
3
1
2
4.3.1Rear Cover
Warning: Disconnect the mains power cord before you remove
the rear cover.
Note: it is necessary to remove the stand before removing the
rear cover.
1. Remove all screws from the back cover.
2. Lift the back cover from the TV. Make sure that wires and
flat coils are not damaged while lifting the rear cover from
the set.
4.3.2Speakers
1. Remove the speaker connector on the SSB.
2. Remove the screws that hold the speaker and take the
speaker out.
When defective, replace the whole unit.
2009-Oct-09
3
Figure 4-5 SSB cover
18730_207_090915.eps
090915
Mechanical Instructions
EN 13PB52.3HU LA4.
5
6
4
Figure 4-6 SSB
4.3.7LCD Panel ME7 styling
Refer to Figure 4-8
for details. This particular photo is taken
from another chassis with different boards but with a similar
construction.
1. Unplug the LVDS connector [1].
Caution: be careful, as this is a very fragile connector!
4
18730_208_090916.eps
090916
3
7
8
Figure 4-7 SSB connector plate
2. Unplug the connectors [2].
3. Remove the fixation screws [3] and [4].
4. Lift the subframe from the set.
5. The LCD panel can now be lifted from the front cabinet.
3
3
4
18730_209_090916.eps
090916
2
4
1
4
2
3
3
3
3
3
3
I_17500_064.eps
091002
Figure 4-8 LCD Panel ME7 styling
2009-Oct-09
EN 14PB52.3HU LA4.
Mechanical Instructions
4.3.8LCD Panel PnS Styling
Refer to Figure 4-9
(slightly) different mechanical construction (some have the
boards directly mounted on the LCD display, others use
brackets), we only describe one model. Disassembly method of
other LCD panels is similar to the one described below. This
particular photo is taken from another chassis with different
boards but with a similar construction.
for details. As every screen size has a
3
1. Remove the Main Supply Panel and Small Signal Board as
earlier described and remove their subframes.
2. Unplug the connectors to and from the Speakers, IR & LED
Board and Key Board Control Panel.
3. Remove the speaker boxes.
4. Remove the stand [1].
5. Release the subframe from the stand [2].
6. Remove the brackets [3] that secure the LCD Panel.
7. The LCD panel can now be lifted from the front cabinet.
3
3
4.4Set Re-assembly
To re-assemble the whole set, execute all processes in reverse
order.
Notes:
•While re-assembling, make sure that all cables are placed
and connected in their original position. See Figure 4-1
Figure 4-3
•Pay special attention not to damage the EMC foams on the
SSB shields. Ensure that EMC foams are mounted
correctly.
.
2
1
Figure 4-9 LCD Panel PnS styling
to
3
2
18440_103_090223.eps
090709
2009-Oct-09
Service Modes, Error Codes, and Fault Finding
5.Service Modes, Error Codes, and Fault Finding
EN 15PB52.3HU LA5.
Index of this chapter:
5.1 Test Points
5.2 Hotel mode
5.3 Service Modes
5.4 Stepwise Start-up
5.5 Service Tools
5.6 Error Codes
5.7 The Blinking LED Procedure
5.8 Protections
5.9 Fault Finding and Repair Tips
5.10 Software Upgrading
5.1Test 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: Color bar signal.
•Audio: 3 kHz left, 1 kHz right.
5.2Hotel mode
Before the service modes can be activated, the set needs to be
switched into normal consumer mode (MTV-Mode) first. Use
an iTV setup remote control (type: RC2753/01, 12nc:
3139 228 88782) to key in the code ‘024995’ directly followed
by the MENU (“M”) button. The text messages “TV Is Now In
MTV Mode” and “Please Do A Cold Start!” appears on the
screen. Disconnect the set for a few seconds from the mains
supply, reconnect the set to the mains supply again. The set is
now in the normal consumer mode (MTV-Mode).
After repair, place the set into hotel mode (iTV-Mode) again.
Key-in the same code on the remote control as described
above, followed by the MENU (“M”) button. The text message
“TV Is Now In ITV Mode” appears. A cold start must be
performed as described above. The set is now in the hotel
mode (iTV-Mode) again.
5.3Service Modes
Service Default mode (SDM) and Service Alignment Mode
(SAM) offers several features for the service technician, while
the Customer Service Mode (CSM) is used for communication
between the call centre and the customer.
This chassis also offers the option of using ComPair, a
hardware interface between a computer and the TV chassis. It
offers the abilities of structured troubleshooting, error code
reading, and software version read-out for all chassis,see
division 5.5.1 ComPair.
5.3.1Service Default Mode (SDM)
Specifications
Table 5-1 SDM default settings
Default
RegionFreq. (MHz)
Europe, AP(PAL/Multi)475.25PAL B/G
Europe, AP DVB-T546.00 PID
NAFTA, APNTSC,LATAM
•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
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.
– Blue mute/Wall paper.
– Auto switch “off” (when there is no “ident” signal).
– Hotel or hospital mode.
– Child lock or parental lock (manual or via V-chip).
– Skipping, blanking of “Not favorite”, “Skipped” or
Locked” presets/channels.
– Automatic storing of Personal Preset or Last Status
settings.
– Automatic user menu time-out (menu switches back/
OFF automatically.
– Automatic volume levelling (AVL).
How to Activate SDM
For this chassis there is one kinds of SDM: an analogue SDM
Tuning will happen according table “SDM Default Settings”.
•AnalogueSDM: 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.
•AnalogueSDM can also be activated by shorting for a
moment the two solder pads on the SSB, with the
indication “SDM”. Activation can be performed in all
modes, except when the set has a problem with the Standby Processor.
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).
Video: 0B 06 PID
PCR: 0B 06 PID
Audio: 0B 07
61.25 (ch 3)NTSC M
system
DVB-T
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
paragraph “Stepwise Start Up”.
•To override SW protections detected by MIPS. See also
paragraph “Error codes”.
•To start the blinking LED procedure (not valid for
protections detected by standby software).
How to Exit SDM
Use one of the following methods:
•Completely remove the power by removing the power plug.
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EN 16PB52.3HU LA5.
Service Modes, Error Codes, and Fault Finding
5.3.2Service Alignment Mode (SAM)
Purpose
•To perform (software) alignments.
•To change option settings.
•To easily identify the used software version.
•To view operation hours.
•To display (or clear) the error code buffer.
How to Activate SAM
Via a standard RC transmitter: key in the code “062596”
directly followed by the “INFO” button. After activating SAM
with this method a service warning will appear on the screen,
you can continue by pressing the red button on the RC.
Contents of SAM:
•Hardware Info.
– A. SW Version. Displays the software version of the
main software (example: P52U1_1.6.12.0 =
AAAAB_X.Y.W.Z).
•AAAA= the chassis name.
•B= the region: A= AP, E= EU, L= LatAm, U = US.
For AP sets it is possible that the Europe software
version is used.
•X.Y.W.Z= the software version, where X is the
main version number (different numbers are not
compatible with one another) and Y.W.Z is the sub
version number (a higher number is always
compatible with a lower number).
– B. SBY PROC Version. Displays the software version
of the stand-by processor.
– C. Production Code. Displays the production code of
the TV, this is the serial number as printed on the back
of the TV set. Note that if an NVM is replaced or is
initialized after corruption, this production code has to
be re-written to NVM. ComPair will foresee in a
possibility to do this.
•Operation Hours. Displays the accumulated total of
operation hours (not the stand-by hours). Every time the
TV is switched “on/off”, 0.5 hours is added to this number.
•Errors (followed by maximal 10 errors). The most recent
error is displayed at the upper left (for an error explanation
see paragraph “Error Codes”).
•Reset Error Buffer. When you press “cursor right” (or the
“OK button) and then the “OK” button, the error buffer is
reset.
•Alignments. This will activate the “ALIGNMENTS” submenu.
•Dealer Options. Extra features for the dealers.
•Options. Extra features for Service. For more info
regarding option codes, see chapter 8 “Alignments”.
Note that if you change the option code numbers, you have
to confirm your changes with the “OK” button before you
store the options. Otherwise you will loose your changes.
•Initialize NVM. 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.
Note: When you have a corrupted NVM, or you have replaced
the NVM, there is a high possibility that you will not have picture
anymore because your display code 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. Refer
to chapter 8 for details. To adapt this option, you can use
ComPair (the correct HEX values for the options can be found
in chapter 8 “Alignments”) or a method via a standard RC
(described below).
Changing the display option via a standard RC
: Key in the
code “062598” directly followed by the “MENU” button and
“XXX”, where XXX is the 3 digit decimal display code (see table
“Option code overview” in chapter 8 “Alignments”, or sticker on
the side/bottom of the cabinet). Make sure to key in all three
digits, also the leading zero’s. If the above action is successful,
the front LED will go out as an indication that the RC sequence
was correct. After the display option is changed in the NVM, the
TV will go to the Stand-by mode. If the NVM was corrupted or
empty before this action, it will be initialized first (loaded with
default values). This initializing can take up to 20 seconds.
Display Option
Code
39mm
040
PHILIPS
MODEL:
32PF9968/10
27mm
PROD.SERIAL NO:
AG 1A0620 000001
(CTN Sticker)
10000_038_090121.eps
090819
Figure 5-1 Location of Display Option Code sticker
•Store. All options and alignments are stored when
pressing “cursor right” (or the “OK” button) and then the
“OK”-button.
•SW Maintenance.
– SW Events. Not useful for Service purposes. In case
of specific software problems, the development
department can ask for this info.
– HW Events. Not useful for Service purposes. In case
of specific software problems, the development
department can ask for this info.
•Test settings. For development purposes only.
•Upload to USB. To upload several settings from the TV to
a USB stick, which is connected to the Side I/O. The items
are “Channel list”, “Personal settings”, “Option codes”,
“Display-related alignments” and “History list”. First you
have to create a directory “repair” in the root of the USB
stick.To upload the settings you have to select each item
separately, press “cursor right” (or the “OK button), confirm
with “OK” and wait until “Done” appears. In case the
download to the USB stick was not successful “Failure” will
appear. In this case, check if the USB stick is connected
properly and if the directory “repair” is present in the root of
the USB stick. Now the settings are stored onto your USB
stick and can be used to download onto another TV or
other SSB. Uploading is of course only possible if the
software is running and if you have a picture. This method
is created to be able to save the customer’s TV settings
and to store them into another SSB.
•Download from USB. To download several settings from
the USB stick to the TV. Same way of working as with
uploading. To make sure that the download of the channel
list from USB to the TV is executed properly, it is necessary
to restart the TV and tune to a valid preset if necessary.
Note: The “History list item” can not be downloaded from
USB to the TV. This is a “read-only” item. In case of specific
problems, the development department can ask for this
info.
2009-Oct-09
Service Modes, Error Codes, and Fault Finding
EN 17PB52.3HU LA5.
How to Navigate
•In SAM, you can select the menu items with the “CURSOR
UP/DOWN” key on the RC-transmitter. The selected item
will be highlighted. When not all menu items fit on the
screen, move the “CURSOR UP/DOWN” key to display the
next/previous menu items.
•With the “CURSOR LEFT/RIGHT” keys, it is possible to:
– (De) activate the selected menu item.
– (De) activate the selected sub menu.
•With the “OK” key, it is possible to activate the selected
action.
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.
5.3.3Customer 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 color bar test pattern
will be visible for 5 seconds. This test pattern is generated by
the Pacific3. So if you see this test pattern you can determine
that the back end video chain (Pacific3, LVDS, and display) of
the SSB is working. In case of a set with DFI panel, an extra
test picture is generated. So you will see the Pacific3 test
picture for 3 seconds and then the DFI EPLD test picture for
another 3 seconds. With this extra test picture you can
determine if the DFI board is working properly.
Also new in this chassis: when you activate CSM 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 your USB stick. This info can be handy
if you do not have picture.
Another new item in this chassis is when CSM is activated, the
complete error-buffer content will be shown via the blinking
LED procedure.
How to Activate CSM
Key in the code “123654” via the standard RC transmitter.
Note: Activation of the CSM is only possible if there is no (user)
menu on the screen!
How to Navigate
By means of the “CURSOR-DOWN/UP” knob on the RCtransmitter, you can navigate through the menus.
Contents of CSM
•Set Type. This information is very helpful for a helpdesk/
workshop as reference for further diagnosis. In this way, it
is not necessary for the customer to look at the rear of the
TV-set. Note that if an NVM is replaced or is initialized after
corruption, this set type has to be re-written to NVM.
ComPair will foresee in a possibility to do this.
•Production Code. Displays the production code (the serial
number) of the TV. Note that if an NVM is replaced or is
initialized after corruption, this production code has to be
re-written to NVM. ComPair will foresee a in possibility to
do this.
•Code 1. Gives the last 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.
•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.
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 consists of 14 characters and is built
up as follows:
- Seven last characters of the 12NC of the SSB itself.
- the serial number of the SSB, which consists of seven
digits. Both can be found on a sticker on the PWB of the
SSB itself. The format of the identification number is then
as follows: <last seven characters of 12NC of SSB><serial
number of SSB> (total fourteen characters).
•Installed date. Indicates the date of the first installation of
the TV. This date is acquired via time extraction.
•Pixel Plus. Gives the last status of the Perfect Pixel HD
setting, as set by the customer. Possible values are “ON”
and “OFF”. See DFU on how to change this item.
•DNR. Gives the last status of the Noise reduction setting,
as set by the customer. Possible values are “OFF”,
“MINIMUM”, “MEDIUM” and “MAXIMUM”. See DFU on
how to change this item.
•Noise Figure. Gives an indication of the signal quality for
the selected transmitter. Possible values are “BAD”,
“AVERAGE”, “GOOD” and “DIGITAL”. In case of a digital
channel, this item will never indicate: “BAD”, “GOOD” or
“AVERAGE” but only displays “DIGITAL”.
•12NC Display. Shows the 12NC of the display.
•MPEG 4 (blue to toggle). Shows the status of the MPEG 4
module. On or Off. See DFU on how to change this item.
•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). See DFU on how to change this item.
•Surround Mode. Indicates the by the customer selected
sound mode (or automatically chosen mode). Possible
values are “STEREO” and “VIRTUAL DOLBY
SURROUND”. It can also have been selected
automatically by signalling bits (internal software). See
DFU on how to change this item.
•AVL. Indicates the last status of AVL (Automatic Volume
Level) as set by the customer: See DFU on how to change
this item.
•Delta Volume. Indicates the last status of the delta volume
for the selected preset as set by the customer: from “-12”
to “+12”. See DFU on how to change this item.
•Volume. Indicates the last status of the volume for the
selected preset as set by the customer: from “0” to “100”.
See DFU on how to change this item.
•Balance. Indicates the last status of the balance for the
selected preset as set by the customer: from “-10” to “+10”.
See DFU on how to change this item.
•Preset Lock. Indicates if the selected preset has a child
lock: “LOCKED” or “UNLOCKED”. See DFU on how to
change this item.
•Lock after. Indicates at what time the channel lock is set:
“OFF” or e.g. “18:45” (lock time). See DFU on how to
change this item.
•TV ratings lock. Only applicable for US.
•Movie ratings lock. Only applicable for US.
•V-Chip TV status. Only applicable for US.
•
V-Chip movie status. Only applicable for US.
•Region rating status (RRT). Only applicable for US.
•Region rating enabled. On of Off.
•Table channel changed. Yes or No.
•On timer. Indicates if the “On timer” is set “ON” or “OFF”
and when it is set to “ON”, also start time, start day and
Gives an identification of the SSB as stored in
2009-Oct-09
EN 18PB52.3HU LA5.
Service Modes, Error Codes, and Fault Finding
program number is displayed. See DFU on how to change
this item.
•Location. Gives the last status of the location setting as
set via the installation menu. Possible values are “SHOP”
and “HOME”. If the location is set to “SHOP”, several
settings are fixed. So for a customer location must be set
to “HOME”. Can be changed via the installation menu (see
also DFU).
•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.
•TV System. Gives information about the video system of
the selected transmitter.
– BG: PAL BG signal received
– DK: PAL DK signal received
– L/La: SECAM L/La signal received
– I: PAL I signal received
– M: NTSC M signal received
– ATSC: ATSC signal received
•12NC one zip SW. Displays the 12NC number of the onezip file as it is used for programming software in production.
In this one-zip file all below software versions can be found.
•Initial main SW. Displays the main software version which
was initially loaded by the factory.
•Current main SW. Displays the built-in main software
version. In case of field problems related to software,
software can be upgraded. As this software is consumer
upgradeable, it will also be published on the Internet.
Example: Q582E_1.2.3.4.
•Flash utils SW. Displays the software version of the
software which contains all necessary components of the
download application. To program this software, EJTAG
tooling is needed. Example: Q582E_1.2.3.4.
•Standby SW. Displays the built-in stand-by processor
software version. Upgrading this software will be possible
via ComPair or via USB (see chapter Software upgrade).
Example: STDBY_3.0.1.2.
•MOP SW. Only applicable for US. At the time of release of
this manual, there was still a problem with this item, and
some rubbish was displayed. Ignore this.
•Pacific 3 Flash SW. Displays the Pacific 3 software
version.
•NVM version. Displays the NVM version as programmed
by factory.
•Display parameters. For development purposes only.
•Private PQ parameters. For development purposes only.
•Public PQ parameters. For development purposes only.
•Ambilight parameters. For development purposes only.
•Acoustics parameters. For development purposes only.
•DFI software (if applicable). Displays the DFI EPLD
software.
•MPEG4 software. Displays the MPEG4 software version.
situation until it is reset (Mains/AC Power supply interrupted).
Caution: in case the start up in this mode with a faulty FET
7U08 is done, you can destroy all ICs supplied by the +3V3,
due to overvoltage. It is recommended to measure first the FET
7U08 on short-circuit before activating SDM via the service
pads.
When the TV is in protection state due to an error detected by
main software (MIPS protection) and SDM is activated via
short-cutting the service pads on the SSB, the TV starts up and
ignores the error.
In this chassis, only error “63” (power-ok) is a MIPS protection
and already displays the failure via blinking LED.
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.
How to Exit CSM
Press “MENU” on the RC-transmitter.
5.4Stepwise Start-up
There are two possible situations: one for protections detected
by the stand-by software and one for protections detected by
the main software.
When the TV is in a protection state due to an error detected by
stand-by software (and thus blinking an error) and SDM is
activated via short-circuiting 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 is, that if e.g.
the 3V3 detection fails (and thus error 8 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
2009-Oct-09
Service Modes, Error Codes, and Fault Finding
Off
Mains
off
Mains
on
EN 19PB52.3HU LA5.
St by
(Off St by)
- POD Card removed
- tact SW pushed
On
For POD should be read Common Interface (CI)
- WakeUp
requested
- Acquisition
needed
- No data Acquisition
required
and no POD present
- tact SW pushed
- WakeUp
requested
- Acquisition
needed
No d ata
Acquisition
required and
POD pre sent
POD
St by
GoToProtection
Figure 5-2 Transition diagram
Semi
St by
GoToProtection
WakeUp
requeste
- St by
requested
- tact SW
pushed
WakeUp
requeste
d
d
Active
GoToProtection
Protection
H_17650_093.eps
180108
2009-Oct-09
EN 20PB52.3HU LA5.
Service Modes, Error Codes, and Fault Finding
Off/Stby to Semi
action holder: MIPS
action holder: St-by
autonomous action
The a vailability of the supplies is checked through detect
signals going to the st-by µP. These signals are available
for +12V and +5V (combined as AND function, called
detect-5V-12V) and for +1V2 and +3V3 (combined as
AND function, called detect-1V2-2V5-3V). A low to high
transition of the signals should occur within a certain time
after toggling the standby line. If an observer is detected
before the time-out elapses, of course, the process
should continue in order to minimize start up time.
Off
Mains is ap plied
Standby Supply starts running.
All stand by supply volta ges become a vailable .
st-b y µP resets
All I/O lines have a High default state:
- Switch P NX85x x in re set (act ive LOW).
- NVM power line is high, no NVM communication possible.
Initialise I/O pins of the st-by µP, start keyboard scanning, RC
because of the stby µP r eset in an F HP set) which w ill start the
Switch ON Platform and display supply by switching LOW the
- Keep the Audio-reset high.
detection. Wake up reasons are off.
PDPGO line is high (either HW wise in a non FHP set or
FHP PDP.
POD-MODE and the ON-MODE I/O lines.
+5V, and +12V are switched on
Wait 50ms and the n start pollin g the dete ct-
5V-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 se t will be ignor ed. Th e protect ion mode will
not be entered.
- Switch Audio-Reset high.
It is low in the standby mode if the standby
mode lasted longer than 10s.
Display sup ply is switched on
through the ON-mode I/O line
detect-5V-12V received within
2900 ms after POD-mode I/O
line toggle?
Yes
activat e +5V/+1 2V supply
detection algorithm. See CHS protections.
Enable the +1V2 supply (ENABLE-1V2 )
Wait 100m s
Enable the supply for
+1.8V and +3. 3V (ENABLE-3V3)
Start polling the detect-1V2-2V5-3V3
every 40ms
Detection
received within
250 ms after enable-3V3
toggle?
Yes
Activate supply detection algorithms for DC-
DC outputs
Wait 20ms
No
“5V 12V supply” error
SP
ms is recommended by the
100
spec
PNX
85xx
.
No separate enable is present
for the +1V8 supply in the
TV522.
Only one detect line is present
in the TV522: it detects +1V2
and +3V3
No
1V2 2V5 3V3 DCDC error
SP
2009-Oct-09
SUPPLY-F AULT I/O line
is High ?
No
Figure 5-3 “Off” to “Semi Stand-by” flowchart (part 1)
Supply fault error
The supply fault line is an OR
function of DCDC, DCDC5050
and POD /CI supply sw itch.
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SUPPLY-F AULT I/O line
is High ?
No
Switch LOW the RESET-NVM_WP-NANDFLASH line. Add a 2ms delay before
trying to address the NVM to allow correct NVM initialization.
No
No
Relea se AVC system r eset
Feed warm boot script
Enable the supply fault detection
(pulling pin of the probe interface to
ground by inserting EJTAG probe)
Yes
algorithm
Set I²C slave address
of Standby µP to (A0h)
Detect EJTAG debug probe
EJTAG probe
connected ?
No
Cold boot?
Yes
Relea se AVC system r eset
Feed cold boot script
No
Supply fault error
SP
This will a llow access to NVM and
NAND FLASH and can not be done
earlier because the FLASH needs to
be in Write Protect as long as the
supplies are not available.
An EJTAG probe (e.g. WindPower ICE probe) can
be connected for Linux Kernel debugging purposes.
Yes
Relea se AVC system r eset
Feed initializing boot script
disable alive mechanism
The supply fault line is an OR
function of DCDC, DCDC5050
and POD /CI supply sw itch.
No
Code = 5
Switch AVC PNX8 5xx
in re set (act ive low)
Wait 10ms
Switch the NVM r eset
line HI GH.
Disable all supply related protections and
switch off the +2V5, +3V3 DC/DC converter.
Wait 5ms
Boot process of the PNX5050 also starts at this point.
Bootscript ready
in 1250 ms?
Set I²C slave address
of Standby µP to (60h)
RPC start (comm. protocol)
No
Code = 53
Flash to Ram image
transfer succeeded
No
SW initializat ion
Enable Alive check mechanism
MIPS reads the wake up reason
from standby µP.
In case of an LCD set, check t he
Power- OK display line
Yes
within 30s?
Yes
succeeded
within 20s?
Yes
Wait until AVC starts to
commun icate
3-th try?
switch off the remaining DC/DC
converters
Switch POD-MODE and ON-MODE
I/O line high.
Power-ok display high ?
Yes
Reset t he Pacific by pulling LOW the Pacific
hardware reset line during 100ms.
No
Figure 5-4 “Off” to “Semi Stand-by” flowchart (part 2)
Log power-ok error and enter
protection
No
MP
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Service Modes, Error Codes, and Fault Finding
switch off the remaining DC/DC
3-th try?
Yes
Blink Code as
error code
Switch POD -MODE and ON- MODE
SP
- Channeldecoder type TDA10060
cannot be reloaded without reset
of the channeldecoder.
- Channeldecoder type TDA10048
can be reloaded without reset.
conver ters
I/O line high.
Channel decoder
TDA 10048?
Power-ok display high ?No
Yes
Reset the Pacific by pulling LOW the Pacific
hardware reset line during 100ms.
Relea se Pacific rese t
and wait 200ms
Ping the Pacific through I²C
Pacific acknowledges?
Yes
Init Pa cific accordin g use case :
- lvds or CMOS input and output
- panel config…
to be discussed with Stefan / SW if we will put this here or in
the display excel overview of Stefan or in …..
Enable the Pacific output by sending the PanelConfig.PanelOn
YesNo
to the Pacific in case of a DFI set
Start 4 seconds preheating timer in case of
an LPL scanning backlight LCD set.
Initialize audio accord ing FMS infor mation :
Download firmware into the channel
decoder
Log power-ok err or and enter
protection
No
MP
Third Pacific boot retry?No
Yes
Log Pacific error
This is needed here because the Pacific has to
deliver an output clock towards the DFI. Otherwise
the DFI cannot deliver ambilight functionality in the
lampadaire mode. The presence of the DFI can be
determined via the display option.
No
Third try?No
Yes
Log channel decoder error
Downloaded
successfu lly?
Yes
initialize tuner , Master IF and channel
decoder
Initialize source selectio n
Wait until Cpipe delivers a stable output
Initialize video processin g IC 's:
- PNX5050 in /82
- scale r EPLD
initialize Au toTV by tr iggering C HS AutoTV I nit interfa ce
Initialize Pacific or EPLD related Ambilight
clock
Reset EPLD
Wait 100ms
Reset Pacific clock
settings (if applicable)
EPLD
and
Pacific
should
be reset
when a
stable
input
clock
become
s
available
at their
input.
2009-Oct-09
Initialize Ambilight with Lights off.
Do not enter semi-standby state in case of an LPL
scanning backlight LCD set before 4s preheating timer has
elapsed.
Semi-Standby
Figure 5-5 “Off” to “Semi Stand-by” flowchart (part 3)
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Service Modes, Error Codes, and Fault Finding
Semi Standby
Wait until previous on-state is left mor e than 2
seconds ago. (to prevent LCD display problems)
Assert RGB video blanking
and audio mute
EN 23PB52.3HU LA5.
action holder: AVC
action holder: St-by
autonomous action
Rewrite Pacific register 0x03 (output format) :
this command is sometimes not processed properly by the
Pacific at initialisation time , r esending it here solves the issue.
Switch on the display by sending the
PanelConfig.PanelOn (I²C) command to the Pacific
wait 250ms (min. = 200ms)
Switch off the dimming backlight feature and
make sure PWM output is set to 100%
Switch on LCD backlight
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.
Initialize audio and video
processing IC's and functions
according needed use case.
Wait until valid and stable audio and video , corresponding to
the requested output is delivered by the AVC AND the
backlight PWM has been on for 1second.
Switch Audio-Reset low and wait 5ms
Release audio mute and wait 100ms before any other audio
handling is done (e.g. volume change)
Restore dimming backlight feature, PWM output and unblank
the video.
Active
Figure 5-6 “Semi Stand-by” to “Active” flowchart
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Service Modes, Error Codes, and Fault Finding
Active
Mute all sound outputs via softmute
Wait 100ms
Set main amplifier mute (I/O: audio-mute)
Force ext audio outputs to ground
(I/O: audio reset)
And wait 5ms
switch off LCD backlight
action holder: AVC
action holder: St-by
autonomous action
Mute all video outputs
Wait 250ms (min. = 200ms)
Switch off the display by sending the
PanelConfig.PanelOff (I²C) command to the Pacific
switch off ambient light
Semi Standby
Figure 5-7 “Active” to “Semi Stand-by” flowchart
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Semi Stand by
If ambientlight functionality was used in semi -standby
(lampadaire mode), switch off ambient light
Delay transition until ramping down of ambient light is
finished . *)
transfer Wake up reasons to the Stand by µP.
Switch Memories to self- r efresh (this creates a more
stable condition when switching off the power).
Switch AVC system in reset state
action holder: MIPS
action holder: St-by
autonomous action
*) If this is not performed and the set is
switched to standby when the sw itch off of
the ambilights is still ongoing , the lights will
switch off abruptly when the supply is cut.
Import ant remark:
release reset audio 10 sec after
entering standby to save power
Wait 10ms
Switch the NVM reset line HIGH.
Disable all supply related protections and switch off
the +1V8 and the +3V3 DC/DC converter
Wait 5ms
switch off the +1V2 DC/DC converters
Switch OFF all supplies by switching HIGH the POD -
MODE and the ON-MODE I/O lines.
Stand by
For PDP this means
CPUGO becomes low.
H_16770_114.eps
260307
Figure 5-8 “Semi Stand-by” to “Stand-by” flowchart
2009-Oct-09
EN 26PB52.3HU LA5.
Service Modes, Error Codes, and Fault Finding
action holder: MIPS
action holder: St-by
autonomous action
MP
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.
SP
Ask stand-by µP to enter protection state
Switch AVC in r ese t state
Wait 10ms
Switch the NVM reset line HIGH.
Disable all supply related protections and switch off
the +1V8 and the +3V3 DC/DC converter.
Wait 5ms
switch off the +1V2 DC/DC converter
Switch OFF a ll supplies by swit ching HI GH the POD -
MODE and the ON-MODE I/O lines .
2009-Oct-09
Flash the Protection-LED in order to indicate
protection state*.
Protection
Figure 5-9 “Protection” flowchart
(*): This can be the standby LED or the ON LED
depending on the availability in the set under
discussion .
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EN 27PB52.3HU LA5.
5.5Service Tools
5.5.1ComPair
Introduction
ComPair (Computer Aided Repair) is a Service tool for Philips
Consumer Lifestyle products. and offers the following:
1. ComPair helps you to quickly get an understanding on how
to repair the chassis in a short and effective way.
2. ComPair allows very detailed diagnostics and is therefore
capable of accurately indicating problem areas. 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 uP
is working) and all repair information is directly available.
4. ComPair features TV software up possibilities.
Specifications
ComPair consists of a Windows based fault finding program
and an interface box between PC and the (defective) product.
The (new) 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).
How to Connect
This is described in the ComPair chassis fault finding database.
TO
UART SERVICE
CONNECTOR
ComPair II
RC in
Optional
Switch
PowerModeLink/
Activity
RC out
2
C or UART commands
TO TV
TO
I2C SERVICE
CONNECTOR
Multi
function
UART SERVICE
CONNECTOR
2
C
I
TO
RS232 /UART
Note: If you encounter any problems, contact your local
support desk.
5.6Error Codes
5.6.1Introduction
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.
Basically there are three kinds of errors:
•Errors detected by the Stand-by software. 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 main software that lead to protection. In this case the TV will go to protection and the
front LED should also blink the concerned error. See also
paragraph “Error Codes” -> “Error Buffer” -> “Extra Info”.
For this chassis only error 63 is a protection error detected
by main software.
•Errors detected by main software 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.
PC
ComPair II Developed by Philips Brugge
Optional power
HDMI
2
I
C only
5V DC
10000_036_090121.eps
090819
Figure 5-10 ComPair II interface connection
Caution: It is compulsory to connect the TV to the PC as
shown in the picture above (with the ComPair interface in
between), as the ComPair interface acts as a level shifter. If
one connects the TV directly to the PC (via UART), ICs will be
blown!
How to Order
ComPair II order codes:
•ComPair II interface: 312278591020.
•Software is available via the Philips Service web portal.
•ComPair RS232 cable: 310431112742 (to be used with
chassis Q52x).
5.6.2How 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.
•Via CSM. when CSM is activated the blinking LED
procedure will start and the CSM content will be written to
a USB stick (if present).
5.6.3How 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.
5.6.4Error 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.
2009-Oct-09
EN 28PB52.3HU LA5.
Service Modes, Error Codes, and Fault Finding
If possible, check the entire contents of the error buffer. In
some situations, an error code is only the result of another error
code and not the actual cause (e.g., a fault in the protection
detection circuitry can also lead to a protection).
There are several mechanisms of error detection:
•Via error bits in the status registers of ICs.
•Via polling on I/O pins going to the stand-by processor.
•Via sensing of analogue values on the stand-by processor
or the PNX85xx.
•Via a “not acknowledge” of an I
2
C communication.
Take notice that some errors need more than 90 seconds
before they start blinking or before they will be logged. So in
case of problems wait 2 minutes from start-up onwards, and
then check if the front LED is blinking or if an error is logged.
Table 5-2 Error code overview
Error/
Error Description
3I2C3EMIPSPNX85xxError logged.
5PNX85xx does
not boot (HW
cause)
65V, 12V supply PStby P/Protection + Error
81V2, 1V4, 2V5,
3V3 supply
9Supply faultPStby P/Protection + Error
2
C-MUX1EMIPSPCA9540Error logged.
11I
12I2C-MUX2EMIPSPCA9540Error logged.
22PNX5050EMIPSPNX5050Error logged.
23HDMI muxEMIPSAD8190/
24I2C switchEMIPSPCA9540Error logged.
26Master IFEMIPSTDA9898/
28MOP (Ambilight
MOP on DFI
1)
panel)
34TunerEMIPSTD1716Error logged.
37Channel decoder EMIPSTDA10060/
38MPEG4EMIPSSTi71xxError logged.
46Pacific3EMIPST6TF4Error blinking + Error
53PNX85xx does
not boot (SW
cause)
63Power OKE/PM IPS/Error logged in case of
65DFI (EPLD on
75iBoardn.a.n.a.n.a.n.a.
76Pro:Idiomn.a. n.a.n.a.n.a.
77DMSDn.a.n.a.n.a.n.a.
DFI panel)
1)
Detected
Prot
by DeviceResult
EStby PPNX85xxError blinking.
blinking.
PStby P/Protection + Error
AD8191
9897/9890
EMIPSEP2CXXF4
EStby PPNX85xxError blinking.
EMIPS/Error blinking + Error
84C7N
TDA10048
blinking.
blinking.
Error logged.
Error logged.
Error logged.
Error logged.
logged.
a PDP set. Protection
in case of an LCD set.
logged.
Note
1) Where applicable.
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 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 3 (I
2
C bus 3 blocked). At the time of release of this
manual, this error was not working as expected (error 3 is
logged and can be read out). 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 (e.g. read out the NVM content). Instead of
error “3” it is possible you will see error “2” in the error
buffer.
•Error 5 (PNX85xx 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 PNX85xx (supplies
not OK, PNX 8535 completely dead, I
and Stand-by Processor broken, etc...). When error 5
occurs it is also possible that I
2
I
C2 can be indicated in the schematics as follows: SCL-
2
C link between PNX
2
C2 bus is blocked (NVM).
UP-MIPS, SDA-UP-MIPS, SCL-SLAVE, SDA-SLAVE,
SCL-2 or SDA-2.
•Error 11 (I
2
I
C-MUX1 bus. At the time of release of this manual, this
2
C MUX1). Indicates a blocked (short circuited)
error was not working as expected. Current situation: when
this error occurs the TV will constantly reboot due to the
blocked bus. The best way for further diagnosis, is to use
ComPair (e.g. read out the NVM content).
•Error 12 (I
2
I
C-MUX2 bus. At the time of release of this manual, this
2
C MUX2). Indicates a blocked (short circuited)
error was not working as expected. Current situation: when
this error occurs the TV will constantly reboot due to the
blocked bus. The best way for further diagnosis, is to use
ComPair (e.g. read out the NVM content).
•Error 24 (I
2
C switch). As a side effect of error 24 it is
possible that error 47(no existing error) will also be logged.
•Error 28 (DFI Ambilight MOP). It can take up to 2 minutes
or more before this error is logged. So if you suspect that
this MOP is defective: clear the error buffer, restart the TV
and wait for about 2 minutes before checking the error
buffer.
•Error 37 (Channel decoder). When this error occurs,
there probably will be no picture and sound from tuner
input. As a side effect of error 37 it is possible that error 4
(no existing error) is also logged.
•Error 46 (Pacific 3). When there is an actual problem with
or around the Pacific during start-up, you will have no
picture and error 46 will be blinked via the blinking LED
procedure. For further diagnosis you can always dump the
CSM content on USB stick (see CSM) or use ComPair.
•Error 53. This error will indicate that the PNX85xx has read
his bootscript (if this would have failed, error 5 would blink)
but initialization was never completed because of hardware
problems (NAND flash, ...) or software initialization
problems. Possible cause could be that there is no valid
software loaded (try to upgrade to the latest main software
version). Note that it can take up to 2 minutes before the TV
starts blinking error 53.
•Error 63 (POWER OK). When this error occurs, it means
that the POWER-OK line did not became “high”. This error
is only applicable for TV’s with an LCD display. For PDP
displays there will be no protection during a POWER-OK
line failure, but error 63 will be logged in the error buffer.
Caution: in case a PDP TV ends up into power-ok
protection, it can indicate that the display option code is set
to “LCD”. To change the display option code to “PDP” you
need to activate SDM via the service pads (see figure
“Service mode pads”). Then change the display option
code blindly 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 figure “Display option code overview”).
•Error 65 (DFI EPLD error). When this error occurs it
means that there is a problem with the I
2
C communication
towards the EPLD (picture processing EPLD, not the
Ambilight EPLD) on the DFI panel.
•Error 75 - 77. These errors are introduced specifically for
the iTV part of these sets.
2009-Oct-09
Service Modes, Error Codes, and Fault Finding
EN 29PB52.3HU LA5.
5.7The Blinking LED Procedure
5.7.1Introduction
The blinking LED procedure can be split up into two situations:
•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.
•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:
5. When all the error-codes are displayed, the sequence
finishes with a LED blink of 3 s,
6. The sequence starts again.
Example: Error 12 8 6 0 0.
After activation of the SDM, the front LED will show:
1. 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. 8 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.
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 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”).
5.8.2Hardware Protections
The only real hardware protection in this chassis is (in case of
an audio problem) the audio protection circuit that will switch
“off” immediately the supply of the SSB. The supply will buzz
during the protection and +12VS drops to approximately 5V5
and +5V Stand-by to approximately to 1V9. Other indication of
the audio protection is that the red LED lights up with an
intensity of 50%.
Repair Tips
•It is also possible that you have an audio DC protection
because of an interruption in one or both speakers (the DC
voltage that is still on the circuit cannot disappear through
the speakers). Caution: (dis)connecting the speaker wires
during the ON state of the TV at high volume can damage
the audio amplifier.
5.9Fault Finding and Repair Tips
5.7.2How to Activate
Use one of the following methods:
•Activate the SDM or CSM. The blinking front LED will
show the entire contents of the error buffer (this works in
“normal operation” mode).
•Transmit the commands “MUTE” - “062500” - “OK” with a normal RC. The complete error buffer is shown.
Take notice that it takes some seconds before the blinking
LED starts.
•Transmit the commands “MUTE” - “06250x” - “OK” with a normal RC (where “x” is a number between 1 and
5). When x= 1 the last detected error is shown, x= 2 the
second last error, etc.... Take notice that it takes some
seconds before the blinking LED starts.
5.8Protections
5.8.1Software Protections
Most of the protections and errors use either the stand-by
microprocessor or the MIPS controller as detection device.
Since in these cases, checking of observers, polling of ADCs,
and filtering of input values are all heavily software based,
these protections are referred to as software protections.
There are several types of software related protections, solving
a variety of fault conditions:
•Protections related to supplies: check of the 12V, +5V,
+1V2, +1V4, 2V5 and +3V3.
•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.
Due to a degeneration process of the AmbiLight, it is
recommended to change all ambilight units in case one unit
needs to be repaired.
5.9.2CSM
When you activate CSM 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 your
USB stick. If this mechanism works you can conclude that a
large part of the operating system is already working (MIPS,
USB...)
5.9.3DC/DC Converter
Introduction
•The best way to find a failure in the DC-DC converters is to
check their starting-up sequence at “power-on via the
mains cord”, presuming that the standby microprocessor is
operational.
•If the input voltage of DC-DC converters is around 12.7V
(measured on decoupling capacitors (2U01 and 2U02) and
the enable signals are “low” (active), then the output
voltages should have their normal values. +12V and +5VPOD supplies start-up first (enabled by POD-MODE signal
from the standby microprocessor). There is a
supplementary condition for +12V to start-up: if +5V-POD
does not start up due to a local defect, then +12V will not
be available as well. +5V-ON supply is enabled by the ONMODE signal (coming also from the standby
microprocessor) and is coming up a little bit later (20 ms)
due to the slower rise time needed to charge the USB
2009-Oct-09
EN 30PB52.3HU LA5.
Service Modes, Error Codes, and Fault Finding
decoupling capacitor 2N31. +1V2 supply starts-up when
+12V appears, then at least 100 ms later, +1V8, +2V5 and
+3V3 will be activated via the ENABLE-3V3 signal from the
standby microprocessor. If +12V value is less than 10 V
then the last enumerated voltages will not show-up due to
the under-voltage detection circuit 6U10 + 7U10 and
surrounding components. Furthermore, if +12V is less than
8V then also +1V2 will not be available. The third DC-DC
convertor that delivers +1V4 out of +12V is started up when
the ENABLE-1V2 becomes active (low) and +12V is
present. The +Vtun generator (present only for the
analogue version of China platforms) will generate +33V
for the analogue tuner as soon as the 12V/3.3V DC-DC
converter will start to operate.
•The consumption of controller IC 7U00 is around 19 mA
(that means almost 200 mV drop voltage across resistor
3U01) and the consumption of controller IC 7U64 is around
12 mA.
•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 stabiliser 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 +1V8 and +2V5 supply voltages are obtained via linear
stabilizer made with discrete components that can deliver
a lot of current, therefore in case +1V8 or +2V5 are shortcircuited to GND then +3V3 will not have the normal value
but much less.
•The SUPPLY-FAULT signal (active low) is an internal
protection (error 9) of the DC-DC convertor and will occur
if the output voltage of any DC-DC convertor is out of limits
(10% of the normal value).
Fault Finding
•Symptom: +1V2 not present (even for a short while ~10
ms)
1. Check 12 V availability (resistor 3U01, MOS-FETs
7U03 and 7U08), and +5V-POD.
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
5U02.
4. Check the over-current detection circuit (2U20 or 3U40
interrupted).
•Symptom: +1V4 not present (even for a short while
~10ms) while +12V is okay (also across input capacitors
and ).
1. Check resistor and power MOS-FETs -1/2
2. Check the voltage on pin 4 (4 V)
3. Check enable signal ENABLE-1V2 (active “low”)
4. Check for +1V4 output voltage short-circuit to GND that
can generate pulsed over-currents 7...10 A through coil
5. Check the over-current detection reference( + ) and the
boot components ( + ).
•Symptom: +1V2 present for about 100ms, +1V8, +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 +1V8) that can generate pulsed overcurrents 7...10 A through coil 5U01,
5. Check the over-current detection circuit (2U18 or 3U31
interrupted).
•Symptom: +1V2 OK, +2V5 and +3V3 present for about
100 ms. Possible cause: SUPPLY-FAULT line stays “low”
even though the +3V3 and +1V2 is available - the standby
microprocessor is detecting that and switching “off” all
supply voltages.
1. Check the drop voltage across resistor 3U01 or 3U7B
(they could be too high, meaning a defective controller
IC or MOS-FETs),
2. Check if the boost voltage on pin 4 of controller IC
7U00 is less than 14 V (should be 19 V),
3. Check if +1V2 or +3V3 are higher than their normal
values - that can be due to defective DC feedback of
the respective DC-DC convertor (ex. 3U47, 3U77, or
3U70).
•Symptom: +1V2, +1V4, +1V8, +2V5 or +3V3 shows a high
level of ripple voltage (audible noise can come from the
filtering coils 5U01 or 5U02). Possible cause: instability of
the frequency and/or duty cycle of a DC-DC converter or
stabilizer.
1. Check the resistor 3U32 and 3U7B, capacitors 2U17
and 2U19, input and output decoupling capacitors.
2. Check a.c. feedback circuits
(2U23+2U24+3U55+3U63 for +1V2, and
2U07+2U08+3U17+3U24 for +3V3), compensation
capacitors 2U34, 2U36, 2U37, 2U40 and 2U68.
•Symptom: +1V2, +1V4, +2V5 and +3V3 ok, no +Vtun
(analogue sets only). Possible cause: the “+VTUN
GENERATOR” circuit (7U24+7U26+surrounding
components) is defective: check transistor 7U24 (it has to
have gate voltage pulses of about 10 V amplitude and drain
voltage pulses of about 35 V amplitude) and surroundings
components. A high consumption (more than 6 mA) from
+Vtun voltage can cause also +Vtun voltage to be too low
or zero.
Note: when a pair of power MOSFETs (7U01+7U06 or
7U03+7U08) becomes defective the controller IC 7U00 should
be replaced as well.
5.9.4Exit “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.
2009-Oct-09
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