Text preview for : lc8.1u_la_312278517741.pdf part of philips 32PFL5403D_F7 service manual
Back to : lc8.1u_la_312278517741.pa | Home
Color Television
Chassis
LC8.1U
LA
MG8
ME8
H_17740_000.eps 240408
Contents
Page
Contents
Page
70 71 73
1. Technical Specifications, Connections, and Chassis Overview 2 2. Safety Instructions, Warnings, and Notes 6 3. Directions for Use 7 4. Mechanical Instructions 8 5. Service Modes, Error Codes, and Fault Finding 20 6. Block Diagrams, Test Point Overview, and Waveforms Wiring Diagram 32" (ME8/MG8) 33 Wiring Diagram 42" & 47" (ME8/MG8) 34 Wiring Diagram 52" (ME8/MG8) 35 Block Diagram Video 36 Block Diagram Audio 37 Block Diagram Control & Clock Signals 38 SSB: Test Points (Bottom Side) 39 I2C IC Overview 40 Supply Lines Overview 41 7. Circuit Diagrams and PWB Layouts Diagram SSB: DC / DC Converter (B1) 42 SSB: Tuner & Demodulator (B2) 43 SSB: Class-D & Muting (B3) 44 SSB: MT5382-Power & Tuner (B4A) 45 SSB: MT5382-DDR2 SDRAM (B4B) 46 SSB: MT5382-Flash & NVM (B4C) 47 SSB: MT5382-LVDS (B4D) 48 SSB: MT5382-HDMI & Mux (B4E) 49 SSB: MT5382-Analog I/Os (B4F) 50 SSB: MJC MT8280-Power (B5P) 51 SSB: MJC MT8280-DDR2 (B5Q) 52 SSB: MJC MT8280-LVDS (B5R) 53 SSB: FPGA-AmbiLight (B6K) 54 SSB: ITV-Channel Decoder (Reserved) (B7L) 55 SSB: ITV-Pro:Idiom (Reserved) (B7M) 56 SSB: SRP List Explanation 57
8. 9.
10. 11.
SSB: SRP List Part 1 58 Keyboard Control Panel (E) 69 Keyboard Control Panel (E) 69 IR & LED Panel(J) 72 Alignments 75 Circuit Descriptions, Abbreviation List, and IC Data Sheets 79 Abbreviation List 89 IC Data Sheets 91 Spare Parts List 95 Revision List 95
PWB 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68 59-68
© Copyright 2008 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 WF 0864 BU TV Consumer Care
Printed in the Netherlands
Subject to modification
EN 3122 785 17741
EN 2
1.
LC8.1U LA
Technical Specifications, Connections, and Chassis Overview
1. Technical Specifications, Connections, and Chassis Overview
Index of this chapter: 1.1 Technical Specifications 1.2 Connection Overview 1.3 Chassis Overview Notes: · Figures can deviate due to the different set executions. · Specifications are indicative (subject to change). 1.1.3 Miscellaneous Power supply: - Mains voltage (VAC) - Mains frequency (Hz) Ambient conditions: - Temperature range (°C) - Maximum humidity
: 90 - 240 : 50 / 60
: +5 to +40 : 90% R.H.
1.1
1.1.1
Technical Specifications
Vision Display type Screen size : : : : : : : : : : : : : : : : : : : : : : LCD 32" (82 cm), 16:9 42" (107 cm), 16:9 47" (120 cm), 16:9 52" (132 cm), 16:9 1366×768 (32") 1366×768(42PFL34x) 1920×1080 (rest) 26000:1 (32" and 42PFL34x) 29000:1 (rest 42" & 47") 33000:1 (52") 500 2 ~ 8 (depending on model number) 178 × 178 (rest) 160 × 160 (52") PLL 100 presets VHF, UHF, S, H ATSC NTSC NTSC Unscrambled digital cable - QAM 640 × 480 800 × 600 1024 × 768 1280 × 1024 1280 × 768 1360 × 768 1920 × 1080i 1920 × 1080p (only for full HD sets) 480i 480p 720p 1080i 1080p (only for full HD sets)
Power consumption (values are indicative) - Normal operation (W) : 240 - Stand-by (W) : <1 Dimensions (W × H × D inch) - 32" - 42" - 47" - 52" Weight without stand (lb.) - 32" - 42" - 47" - 52"
Resolution (H × V pixels)
: : : :
32.3 × 20.4 × 3.6 40.7 × 26.2 × 3.5 44.8 × 28.5 × 4.0 51.2 × 31.4 × 4.7
Dyn. contrast ratio
: : : :
31.9 45.1 60.5 83.8
Min. light output (cd/m2) Typ. response time (ms) Viewing angle (H × V degrees) Tuning system Presets/channels Tuner bands TV Color systems Video playback Cable
Supported computer formats (60Hz) : : : : : : : : Supported video formats (60Hz) : : : : :
1.1.2
Sound Sound systems : : : : Stereo BBE® Dolby Digital® 20 ~ 30 (depending on model number)
Maximum power (WRMS)
Technical Specifications, Connections, and Chassis Overview 1.2 Connection Overview
USB2.0 (16)
LC8.1U LA
1.
EN 3
1
TV ANTENNA
2
3
4
1
R
2
R
3
R
4
5
SERV. U
Service Connector UART
E_06532_022.eps 300904
12
R AUDIO
Figure 1-3 USB (type A) 1 2 3 4 1.2.2 - +5V - Data (-) - Data (+) - Ground k jk jk H
L
L
L SPDIF OUT
Pr
Pr
6
VIDEO S-VIDEO L R
L
13
Pb
Pb
VIDEO
Y
Y
7
S-VIDEO
Gnd
AV 1 HDMI 1 HDMI 2
AV 2
AV 3
DVI AUDIO IN
14 15 16
I_17741_001.eps 230408
HDMI 3
HDMI 4
Rear Connections HDMI1, 2 & 3: Digital Video, Digital Audio - In (9, 10, 11) 1 - D2+ Data channel j 2 - Shield Gnd H 3 - D2Data channel j 4 - D1+ Data channel j 5 - Shield Gnd H 6 - D1Data channel j 7 - D0+ Data channel j 8 - Shield Gnd H 9 - D0Data channel j 10 - CLK+ Data channel j 11 - Shield Gnd H 12 - CLKData channel j 13 - n.c. 14 - n.c. 15 - DDC_SCL DDC clock j 16 - DDC_SDA DDC data jk 17 - Ground Gnd H 18 - +5V j 19 - HPD Hot Plug Detect j 20 - Ground Gnd H HDMI3: Cinch: DVI Audio - In (7) Rd - Audio - R 0.5 VRMS / 10 kohm Wh - Audio - L 0.5 VRMS / 10 kohm Aerial - In (1) - - F-type (US)
USB
11
10
8
9
Figure 1-1 Side and rear I/O connections Note: The following connector color abbreviations are used (acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy= Grey, Rd= Red, Wh= White, and Ye= Yellow. 1.2.1 Side Connections Head phone - Out (12) Bk - Head phone 32 - 600 ohm / 10 mW Cinch: Video CVBS - In, Audio - In (13) Ye - Video CVBS 1 VPP / 75 ohm Wh - Audio L 0.5 VRMS / 10 kohm Rd - Audio R 0.5 VRMS / 10 kohm S-Video (Hosiden): Video Y/C - In (14) 1 - Ground Y Gnd 2 - Ground C Gnd 3 - Video Y 1 VPP / 75 ohm 4 - Video C 0.3 VPP / 75 ohm HDMI4: Digital Video, Digital Audio - In (15)
19 18 1 2
E_06532_017.eps 250505
rt
jq jq jq
H H j j
jq jq
Coax, 75 ohm
D
Figure 1-2 HDMI (type A) connector 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 - D2+ - Shield - D2- D1+ - Shield - D1- D0+ - Shield - D0- CLK+ - Shield - CLK- n.c. - n.c. - DDC_SCL - DDC_SDA - Ground - +5V - HPD - Ground Data channel Gnd Data channel Data channel Gnd Data channel Data channel Gnd Data channel Data channel Gnd Data channel j H j j H j j H j j H j j jk H j j H
AV1 & 2: Cinch: Video YPbPr - In, Audio - In (2, 3) Gn - Video Y 1 VPP / 75 ohm Bu - Video Pb 0.7 VPP / 75 ohm Rd - Video Pr 0.7 VPP / 75 ohm Wh - Audio L 0.5 VRMS / 10 kohm Rd - Audio R 0.5 VRMS / 10 kohm AV3: Cinch: Video CVBS - In, Audio - In (4) Ye - Video CVBS 1 VPP / 75 ohm Wh - Audio L 0.5 VRMS / 10 kohm Rd - Audio R 0.5 VRMS / 10 kohm AV3: S-Video (Hosiden): Video Y/C - In (8) 1 - Ground Y Gnd 2 - Ground C Gnd 3 - Video Y 1 VPP / 75 ohm 4 - Video C 0.3 VPPP / 75 ohm Service Connector UART (5) 1 - UART_TX Transmit 2 - Ground Gnd 3 - UART_RX Receive Cinch: S/PDIF - Out (6) Bk - Coaxial 0.4 - 0.6VPP / 75 ohm
jq jq jq jq jq
jq jq jq
H H j j
DDC clock DDC data Gnd Hot Plug Detect Gnd
k H j
kq
EN 4 1.3
1.
LC8.1U LA
Technical Specifications, Connections, and Chassis Overview
Chassis Overview
A E
MAIN SUPPLY PANEL KEYBOARD & CONTROL PANEL SMALL SIGNAL BOARD
B
J
IR & LED PANEL
I_17741_016.eps 280108
Figure 1-4 PWB/CBA locations 32" models
A E
MAIN SUPPLY PANEL KEYBOARD & CONTROL PANEL SMALL SIGNAL BOARD
B
H_17650_083.eps 160108
J
IR & LED PANEL
H_17740_041.eps 240108
Figure 1-5 PWB/CBA locations 42" models
Technical Specifications, Connections, and Chassis Overview
LC8.1U LA
1.
EN 5
A E
MAIN SUPPLY PANEL KEYBOARD & CONTROL PANEL SMALL SIGNAL BOARD
B
J
IR & LED PANEL
I_17741_017.eps 280108
Figure 1-6 PWB/CBA locations 47" models
A E
MAIN SUPPLY PANEL KEYBOARD & CONTROL PANEL SMALL SIGNAL BOARD
B
J
IR & LED PANEL
I_17741_018.eps 280108
Figure 1-7 PWB/CBA locations 52" models
EN 6
2.
LC8.1U LA
Safety Instructions, Warnings, and Notes
2. Safety Instructions, Warnings, and Notes
Index of this chapter: 2.1 Safety Instructions 2.2 Warnings 2.3 Notes · 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. Manufactured under license from Dolby Laboratories. "Dolby", "Pro Logic" and the "double-D symbol", are trademarks of Dolby Laboratories.
2.1
Safety Instructions
Safety regulations require the following during a repair: · Connect the set to the Mains/AC Power via an isolation transformer (> 800 VA). · Replace safety components, indicated by the symbol h, only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard. Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points: · Route the wire trees correctly and fix them with the mounted cable clamps. · Check the insulation of the Mains/AC Power lead for external damage. · Check the strain relief of the Mains/AC Power cord for proper function. · Check the electrical DC resistance between the Mains/AC Power plug and the secondary side (only for sets that have a Mains/AC Power isolated power supply): 1. Unplug the Mains/AC Power cord and connect a wire between the two pins of the Mains/AC Power plug. 2. Set the Mains/AC Power switch to the "on" position (keep the Mains/AC Power cord unplugged!). 3. Measure the resistance value between the pins of the Mains/AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 Mohm and 12 Mohm. 4. Switch "off" the set, and remove the wire between the two pins of the Mains/AC Power plug. · Check the cabinet for defects, to prevent touching of any inner parts by the customer.
·
2.3.2
Schematic Notes · All resistor values are in ohms, and the value multiplier is often used to indicate the decimal point location (e.g. 2K2 indicates 2.2 kohm). Resistor values with no multiplier may be indicated with either an "E" or an "R" (e.g. 220E or 220R indicates 220 ohm). All capacitor values are given in micro-farads (= × 10-6), nano-farads (n= × 10-9), or pico-farads (p= × 10-12). Capacitor values may also use the value multiplier as the decimal point indication (e.g. 2p2 indicates 2.2 pF). An "asterisk" (*) indicates component usage varies. Refer to the diversity tables for the correct values. The correct component values are listed in the Spare Parts List. Therefore, always check this list when there is any doubt.
·
· · · ·
2.3.3
BGA (Ball Grid Array) ICs BGA Temperature Profiles For BGA-ICs, you must use the correct temperature-profile, which is coupled to the 12NC. For an overview of these profiles, contact your local Service organization.
2.3.4
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 Philips SAC305 with order code 0622 149 00106. If lead-free solder paste is required, please contact the manufacturer of your soldering equipment. In general, use of solder paste within workshops should be avoided because paste is not easy to store and to handle. · Use only adequate solder tools applicable for lead-free soldering tin. The solder tool must be able: To reach a solder-tip temperature of at least 400°C. To 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.
2.2
Warnings
· All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD w). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential. Be careful during measurements in the high voltage section. Never replace modules or other components while the unit is switched "on". When you align the set, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable.
· · ·
2.3
2.3.1
Notes
General · Measure the voltages and waveforms with regard to the chassis (= tuner) ground (H), or hot ground (I), depending on the tested area of circuitry. The voltages and waveforms shown in the diagrams are indicative. Measure them in the Service Default Mode (see chapter 5) with a color bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or 61.25 MHz for NTSC (channel 3).
Directions for Use
2.3.5 Alternative BOM identification
MODEL
LC8.1U LA
3.
EN 7
: 32PF9968/10
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 center (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.
PROD.NO: AG 1A0617 000001
MADE IN BELGIUM 220-240V ~ 50/60Hz 128W VHF+S+H+UHF
S
Figure 2-1 Serial number (example) 2.3.6
BJ3.0E LA
E_06532_024.eps 260308
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!
2.3.7
Practical Service Precautions · It makes sense to avoid exposure to electrical shock. While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard. Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.
·
3. Directions for Use
You can download this information from the following websites: http://www.philips.com/support http://www.p4c.philips.com
EN 8
4.
LC8.1U LA
Mechanical Instructions
4. Mechanical Instructions
Index of this chapter: 4.1 Cable Dressing 4.2 Service Positions 4.3 Assy/Panel Removal ME8 Styling 4.4 Set Re-assembly Notes: · Figures below can deviate slightly from the actual situation, due to the different set executions. · Follow the disassemble instructions in described order. · Please pay special attention to the speaker wires when reassembling the set. Place the cable tapes as shown in next figures.
4.1
Cable Dressing
CONNECTOR WITH LOCK INSERTED TO PSU CONNECTOR WITHOUT LOCK INSERTED TO PANEL
Inverter Cable AC Mains Cable
Speaker and IR cable dressing: Tape to keep out of speaker terminals
Speaker cable dressing: Pull cable taut underneath SSB Plate before taping to keep out of stand area
I_17741_009.eps 280408
Figure 4-1 Cable dressing (32" models, ME8 styling)
Mechanical Instructions
LC8.1U LA
4.
EN 9
CONNECTOR WITH LOCK INSERTED TO PSU CONNECTOR WITHOUT LOCK INSERTED TO PANEL
AC Mains Shield wire to be grounded to bottom corner of PSU with screw
Detailed view of speaker cable dressing: Pull cable taut underneath SSB Plate before
I_17741_008.eps 240408
Figure 4-2 Cable dressing (32" models, MG8 styling)
EN 10
4.
LC8.1U LA
Mechanical Instructions
Tape tweeter wire to metal frame (both ends) to keep away from tweeter terminal
I_17741_010.eps 240408
Figure 4-3 Cable dressing (42" models, ME8 styling)
I_17741_011.eps 240408
Figure 4-4 Cable dressing (42" models, MG8 styling)
Mechanical Instructions
LC8.1U LA
4.
EN 11
Tape the 8C02 cable (IR Board to SSB) and the short red tweeter wire together.
I_17741_013.eps 240408
Figure 4-5 Cable dressing (47" models, ME8 styling)
EN 12
4.
LC8.1U LA
Mechanical Instructions
I_17741_012.eps 240408
Figure 4-6 Cable dressing (47" models, MG8 styling)
Mechanical Instructions
LC8.1U LA
4.
EN 13
Tape inverter cable so it stays in-between the LCD Panel lamp holders as shown to avoid EMC Foam on SSB Bars.
NOTE: For inverter cables, the connector with ferrite is to be inserted at the PSU side
Note orientation of wire saddle the IR and Speaker Cables must not be parallel with AC Mains cable
Tape speaker wires to prevent interference with speaker terminal
I_17741_014.eps 240408
Figure 4-7 Cable dressing (52" models, ME8 styling)
EN 14
4.
LC8.1U LA
Mechanical Instructions
Tape inverter cable so it stays in-between the LCD Panel lamp holders as shown to avoid EMC Foam on SSB Bars.
NOTE: For inverter cables, the connector with ferrite is to be inserted at the PSU side
Note horizontal orientation of wire saddle the IR and Speaker Cables must cross the AC Mains Cable with "X" shape and not lay in parallel
I_17741_015.eps 250408
Figure 4-8 Cable dressing (52" models, MG8 styling)
Mechanical Instructions 4.2 Service Positions
For easy servicing of this set, there are a few possibilities created: · The buffers from the packaging. · Foam bars (created for Service). 4.2.1 Foam Bars
LC8.1U LA
4.
EN 15
4.3
4.3.1
Assy/Panel Removal ME8 Styling
Back Cover Warning: Disconnect the mains power cord before you remove the back cover. Note: it is not necessary to remove the stand while removing the back cover. Warning: Most sets have an additional hatch located in the back cover. These are meant for disconnecting the flat cables to the AmbiLight units in the back cover, before the back cover is lifted from the set. The hatches are not always located at the same place for all sets, therefore the figures below are only meant as indication. It is mandatory to locate these hatches first, open them, and unplug connectors behind. Lifting the back cover without having done so, could result in damaging the connectors inside! Refer to next figures for details. 1. First remove the screws [1] from the back cover hatch and remove the hatch. 2. Then unplug connector(s) [3]. 3. Remove the screws [2], gently lift the back cover from the set. Make sure that wires and flat coils are not damaged while lifting the back cover from the set.
1
1
Required for sets 42"
E_06532_018.eps 171106
Figure 4-9 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. 4.2.2 Service Stands The MkII aluminium Service Stands are not suitable for this chassis. Use the stands that come with the set instead.
3
H_17740_022.eps 230108
Figure 4-10 Back Cover Removal [1/2]
EN 16
4.
LC8.1U LA
Mechanical Instructions
2 2
2
2
2
2 2
2
2
1 1 2 2 2 2
2
2
2
2
2
2
H_17740_024.eps 230108
Figure 4-11 Back Cover Removal [2/2] 4.3.2 Ambilight (if present) Refer to next figure for details. 1. Unplug the connectors [1]. 2. Remove the screws [2]. 3. Pull the unit sidewards from the back cover. When defective, replace the whole unit. 4.3.3 Loudspeaker (MG8 styling only) 1. Unplug the connectors. 2. Remove the screws. 3. Remove the loudspeaker.
2
1
H_17650_097.eps 180108
Figure 4-12 Ambilight Unit
Mechanical Instructions
4.3.4 Woofers (ME8 styling only) Refer to next figure for details. 1. Remove the screws [1] and [2] and lift the whole unit from the back cover. Take the speakers out together with their casing. When defective, replace the whole unit. 4.3.7 Key Board
LC8.1U LA
4.
EN 17
Refer to next figure for details. 1. Unplug the key board connector from the IR & LED board. 2. Remove the screws [1]. 3. Lift the unit and take it out of the set. When defective, replace the whole unit.
2 3
1 3
H_17740_023.eps 230108
1
Figure 4-13 Woofer 4.3.5 Tweeters (ME8 styling only) Refer to next figure for details. Warning: The speakers should never be connected or disconnected when the set is playing! This can damage the amplifiers on the SSB. 1. Unplug connector [1]. 2. Remove screws [2] and remove unit. Note: After repair, be sure to place the cable tapes (see also cable dressing figures for the exact location). Figure 4-16 Key Board
1
H_17650_094.eps 180108
4.3.8
Display Supply Panel Refer to next figure for details. Note: depending on the set execution, the used PSU can differ from figure below. 1. Unplug connectors [1]. 2. Remove the fixation screws [2]. 3. Take the board out.
2
H_17650_095.eps 180108
2
1 1 2
Figure 4-14 Tweeter 4.3.6 IR & LED Board Refer to next figure for details. 1. Unplug connectors [1]. 2. Use a flat screw driver to release the clip by pushing it in the indicated direction [2]. 3. Lift the board and take it out of the set. When defective, replace the whole unit.
2
2 1 2
2
1
1 2 2
H_17740_021.eps 230108
Figure 4-17 Display Supply Panel
2
H_17650_098.eps 180108
Figure 4-15 IR & LED Board
EN 18
4.3.9
4.
LC8.1U LA
Mechanical Instructions
2. Unplug the connectors [2]. 3. Remove the screws [3]. 4. The SSB can now be taken out of the set, together with the front shield and the side cover. 5. To remove the shield, remove the screws [4] and lift it of while releasing clips [5]. 6. Release clip [6] and slide the cover sidewards from the SSB.
Small Signal Board (SSB) Refer to below figure 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. Refer to next figures or details. 1. Unplug the LVDS connector(s) [1]. Caution: be careful, as this is a very fragile connector!
3
OPTIONAL OPTIONAL
3 1 6 5 5
3
3
OPTIONAL
2
4
4 4 3
4 4
4
4 3
4
3 5
H_17740_019.eps 230108
Figure 4-18 Small Signal Board
Mechanical Instructions
4.3.10 LCD Panel Refer to next figures for details. The figure used is from a 42inch model, but the other screensizes have similar constructions. 1. Remove the stand. 2. Unplug the LVDS connector(s) [1]. Caution: be careful, as this is a very fragile connector! 3. Unplug the connectors [2]. 4. Remove the fixation screws [3] from rim. 5. Take the rim from the set. 6. Remove the fixation screws [4] and [5]. 7. Lift the subframe from the set. 8. The LCD panel can now be lifted from the front cabinet.
LC8.1U LA
4.
EN 19
4
4 4
5 3
5 1
5
5
2 2 3 5 4 2
H_17740_020.eps 230108
5 4 4
5 4
5
4
Figure 4-19 LCD Panel (example from 42'' model)
4.4
Set Re-assembly
To re-assemble the whole set, execute all processes in reverse order. Notes: · Important: While re-assembling, make sure that all cables and cable tapes are placed in their original position. See figure "Cable dressing". · Pay special attention not to damage the EMC foams on the SSB shields. Ensure that EMC foams are mounted correctly.
EN 20
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding
5. Service Modes, Error Codes, and Fault Finding
Index of this chapter: 5.1 Test Points 5.2 Service Modes 5.3 Service Tools 5.4 Error Codes 5.5 The Blinking LED Procedure 5.6 Fault Finding and Repair Tips 5.7 Software Upgrading 5.2.1 General Some items are applicable to all Service Modes or are general. These are listed below. Life Timer During the life time cycle of the TV set, a timer is kept (called "Op. Hour"). It counts the normal operation hours (not the Stand-by hours). The actual value of the timer is displayed in SDM and SAM in a decimal value. Every two soft-resets increase the hour by +1. Standby hours are not counted. Software Identification, Version, and Cluster The software ID, version, and cluster will be shown in the main menu display of SDM, SAM, and CSM. The screen will show: "AAAABCD X.YY", where: · AAAA is the chassis name: LC81. · B is the region indication: E= Europe, A= AP/China, U= NAFTA, L= LATAM. · C is the display indication: L= LCD, P= Plasma. · D is the language/feature indication: P= Philips, M= Magnavox. · X is the main version number: this is updated with a major change of specification (incompatible with the previous software version). Numbering will go from 1 - 9 and A - Z. If the main version number changes, the new version number is written in the NVM. If the main version number changes, the default settings are loaded. · YY is the sub version number: this is updated with a minor change (backwards compatible with the previous versions) Numbering will go from 00 - 99. If the sub version number changes, the new version number is written in the NVM. If the NVM is fresh, the software identification, version, and cluster will be written to NVM. Display Option Code Selection When after an SSB or display exchange, the display option code is not set properly, it will result in a TV with "no display". Therefore, it is required to set this display option code after such a repair. To do so, press the following key sequence on a standard RC transmitter: "062598" directly followed by MENU and "xxx", where "xxx" is a 3 digit decimal value of the panel type: see column "Panel Code" in table "Option Codes OP1...OP7" (ch. 8), or see sticker on the side/bottom of the cabinet. When the value is accepted and stored in NVM, the set will switch to Stand-by, to indicate that the process has been completed.
5.1
Test Points
In the chassis schematics and layout overviews, the test points are mentioned. In the schematics, test points are indicated with "Fxxx" or "Ixxx", in the layout overviews with a "half-moon" sign. As most signals are digital, it will be difficult to measure waveforms with a standard oscilloscope. Several key ICs are capable of generating test patterns, which can be controlled via ComPair. In this way it is possible to determine which part is defective. Perform measurements under the following conditions: · Service Default Mode. · Video: Color bar signal. · Audio: 3 kHz left, 1 kHz right.
5.2
Service Modes
The Service Mode feature is split into four parts: · Service Default Mode (SDM). · Service Alignment Mode (SAM). · Customer Service Mode (CSM). · Computer Aided Repair Mode (ComPair). SDM and SAM offer features, which can be used by the Service engineer to repair/align a TV set. Some features are: · A pre-defined situation to ensure measurements can be made under uniform conditions (SDM). · Activates the blinking LED procedure for error identification when no picture is available (SDM). · The possibility to overrule software protections when SDM is entered via the Service pins. · Make alignments (e.g. White Tone), (de)select options, enter options codes, reset the error buffer (SAM). · Display information ("SDM" or "SAM" indication in upper right corner of screen, error buffer, software version, operating hours, options and option codes, sub menus). The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call centre. In CSM mode, "CSM", is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to: · Increase the home repair hit rate. · Decrease the number of nuisance calls. · Solved customers' problem without home visit. ComPair Mode is used for communication between a computer and a TV on I2C /UART level and can be used by a Service engineer to quickly diagnose the TV set by reading out error codes, read and write in NVMs, communicate with ICs and the uP (PWM, registers, etc.), and by making use of a fault finding database. It will also be possible to up and download the software of the TV set via I2C with help of ComPair. To do this, ComPair has to be connected to the TV set via the ComPair connector, which will be accessible through the rear of the set (without removing the rear cover).
Display Option Code
39mm
PHILIPS
27mm
040
MODEL: 32PF9968/10
PROD.SERIAL NO: AG 1A0620 000001
(CTN Sticker)
E_06532_038.eps 240108
Figure 5-1 Location of Display Option Code sticker During this algorithm, the NVM-content must be filtered, because several items in the NVM are TV-related and not SSBrelated (e.g. Model and Prod. S/N). Therefore, "Model" and "Prod. S/N" data is changed into "See Type Plate". In case a call centre or consumer reads "See Type Plate" in CSM mode, he needs to look to the side/bottom sticker to identify the set, for further actions.
Service Modes, Error Codes, and Fault Finding
5.2.2 Service Default Mode (SDM) Purpose Set the TV in SDM mode in order to be able to: · Create a pre-defined setting for measurements to be made. · Override software protections. · Start the blinking LED procedure. · Read the error buffer. · Check the life timer. Specifications Table 5-1 SDM default settings Region Freq. (MHz) Default syst. PAL B/G
LC8.1U LA
5.
EN 21
On Screen Menu After activating SDM, the following screen is visible, with SDM in the upper right corner of the screen to indicate that the television is in Service Default Mode.
Europe (except France), 475.25 AP-PAL/-Multi France NAFTA, AP-NTSC LATAM · ·
H_17740_030.eps 230108
SECAM L 61.25 (channel 3) NTSC M PAL M Menu explanation: · HHHHH: Are the operating hours (in decimal). · AAAABCD-X.YY: See paragraph "Service Modes" -> "General" -> "Software Identification, Version, and Cluster" for the SW name definition. · EER: Shows all errors detected since the last time the buffer was erased. Five errors possible. · OP: Used to read-out the option bytes. See "Options" in the Alignments section for a detailed description. Ten codes (in two rows) are possible. How to Navigate As this mode is read only, there is not much to navigate. To switch to other modes, use one of the following methods: · Command MENU from the user remote will enter the normal user menu (brightness, contrast, color, etc...) with "SDM" OSD remaining, and pressing MENU key again will return to the last status of SDM again. · To prevent the OSD from interfering with measurements in SDM, command "OSD" or "i+" ("STATUS" or "INFO" for NAFTA and LATAM) from the user remote will toggle the OSD "on/off" with "SDM" OSD remaining always "on". · Press the following key sequence on the remote control transmitter: "062596" directly followed by the OSD/ STATUS/INFO/i+ button to switch to SAM (do not allow the display to time out between entries while keying the sequence). How to Exit Switch the set to STANDBY by pressing the mains button on the remote control transmitter or on the television set. If you switch the television set "off" by removing the mains (i.e., unplugging the television), the television set will remain in SDM when mains is re-applied, and the error buffer is not cleared. The error buffer will only be cleared when the "clear" command is used in the SAM menu. Note: · If the TV is switched "off" by a power interrupt while in SDM, the TV will show up in the last status of SDM menu as soon as the power is supplied again. The error buffer will not be cleared. · In case the set is in Factory mode by accident (with "F" displayed on screen), by pressing and hold "VOL-" and "CH-" together should leave Factory mode. Figure 5-3 SDM menu
Set linear video and audio settings to 50%, but volume to 25%. Stored user settings are not affected. All service-unfriendly modes (if present) are disabled, since they interfere with diagnosing/repairing a set. These service unfriendly modes are: (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. Auto Volume levelling (AVL).
How to Activate To activate SDM, use one of the following methods: · Press the following key sequence on the remote control transmitter: "062596" directly followed by the MENU button (do not allow the display to time out between entries while keying the sequence). · Short one of the "Service" jumpers on the TV board during cold start (see Figures "Service jumper"). Then press the mains button (remove the short after start-up). Caution: Activating SDM by shorting "Service" jumpers will override the DC speaker protection (error 1), the General I2C error (error 4), and the Trident video processor error (error 5). When doing this, the service-technician must know exactly what he is doing, as it could damage the television set.
H_17740_031.eps 230108
Figure 5-2 Service jumper (SSB component side)
EN 22
5.2.3
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding
How to Navigate · In the SAM menu, select menu items with the UP/DOWN keys on the remote control transmitter. The selected item will be indicated. When not all menu items fit on the screen, use the UP/DOWN keys to display the next / previous menu items. · With the LEFT/RIGHT keys, it is possible to: Activate the selected menu item. Change the value of the selected menu item. Activate the selected sub menu. · When you press the MENU button twice while in top level SAM, the set will switch to the normal user menu (with the SAM mode still active in the background). To return to the SAM menu press the MENU button. · The "OSD/STATUS/INFO/i+" key from the user remote will toggle the OSD "on/off" with "SAM" OSD remaining always "on". · Press the following key sequence on the remote control transmitter: "062596" directly followed by the MENU button to switch to SDM (do not allow the display to time out between entries while keying the sequence). How to Store SAM Settings To store the settings changed in SAM mode (except the OPTIONS and RGB ALIGN settings), leave the top level SAM menu by using the POWER button on the remote control transmitter or the television set. The mentioned exceptions must be stored separately via the STORE button. How to Exit Switch the set to STANDBY by pressing the mains button on the remote control transmitter or the television set. Note: · When the TV is switched "off" by a power interrupt while in SAM, the TV will show up in "normal operation mode" as soon as the power is supplied again. The error buffer will not be cleared. · In case the set is in Factory mode by accident (with "F" displayed on screen), by pressing and hold "VOL-" and "CH-" together should leave Factory mode.
H_17740_025.eps 230108
Service Alignment Mode (SAM) Purpose · To change option settings. · To display / clear the error code buffer. · To perform alignments. Specifications · Operation hours counter (maximum five digits displayed). · Software version, error codes, and option settings display. · Error buffer clearing. · Option settings. · Software alignments (White Tone). · NVM Editor. · Set screen mode to full screen (all content is visible). How to Activate To activate SAM, use one of the following methods: · Press the following key sequence on the remote control transmitter: "062596" directly followed by the OSD/ STATUS/INFO/i+ button (it depends on region which button is present on the RC). Do not allow the display to time out between entries while keying the sequence. · Or via ComPair. After entering SAM, the following screen is visible, with SAM in the upper right corner of the screen to indicate that the television is in Service Alignment Mode.
Figure 5-4 SAM menu Menu explanation: 1. System Information: · Op. Hour. This represents the life timer. The timer counts normal operation hours, but does not count Stand-by hours. · MAIN SW ID. See paragraph "Service Modes" -> "General" -> "Software Identification, Version, and Cluster" for the SW name definition. · ERROR CODES. Shows all errors detected since the last time the buffer was erased. Five errors possible. · OP1 / OP2. Used to read-out the option bytes. See "Options" in the Alignments section for a detailed description. Ten codes are possible. 2. Clear. Erases the contents of the error buffer. Select the CLEAR menu item and press the MENU RIGHT key. The content of the error buffer is cleared. 3. Options. To set the option bits. See "Options" in the "Alignments" chapter for a detailed description. 4. RGB Align. To align the White Tone. See "White Tone" in the "Alignments" chapter for a detailed description. 5. NVM Editor. To change the NVM data in the television set. See also paragraph "Fault Finding and Repair Tips". 6. NVM Copy. Gives the possibility to copy/load the NVM file to/from an USB stick. Important: NVM data copied to a USB memory device is named "TV2USB.bin". When copied back to a TV, the file first must be renamed to "USB2TV.bin".
Service Modes, Error Codes, and Fault Finding
5.2.4 Customer Service Mode (CSM) Purpose The Customer Service Mode shows error codes and information on the TV's operation settings. A call centre can instruct the customer (by telephone) to enter CSM in order to identify the status of the set. This helps them to diagnose problems and failures in the TV before making a service call. The CSM is a read-only mode; therefore, modifications are not possible in this mode. Specifications · Ignore "Service unfriendly modes". · Line number for every line (to make CSM language independent). · Set the screen mode to full screen (all contents on screen is visible). · After leaving the Customer Service Mode, the original settings are restored. · Possibility to use "CH+" or "CH-" for channel surfing, or enter the specific channel number on the RC. How to Activate To activate CSM, press the following key sequence on a standard remote control transmitter: "123654" (do not allow the display to time out between entries while keying the sequence). Upon entering the Customer Service Mode, the following screen will appear:
LC8.1U LA
5.
EN 23
Menu Explanation 1. Model Number. Type number, e.g. 42PFL5603D/27. (*) 2. Production Serial Number. Product serial no., e.g. SV1A0805123456 (*). SV= Production center, 1= BOM code, A= Service version change code, 08= Production year, o5= Production week, 123456= Serial number. 3. Software Version. Main software cluster and version is displayed. 4. Option Code 1. Option code information (group 1). 5. Option Code 1. Option code information (group 2). 6. Codes. Error buffer contents. 7. SSB. Indication of the SSB factory ID (= 12nc). (*) 8. Display. Indication of the display ID (=12 nc). (*) 9. NVM Version. The NVM software version no. 10. PQ Version. PQ (picture quality) data version. This is a subset of the main SW. 11. Key (HDCP). Indicates if the HDMI keys (or HDCP keys) are valid or not. 12. Digital Signal Quality. Tuner signal condition in percentage. 13. Blank. 14. Audio System. Gives information about the audio system of the selected transmitter (MONO/STEREO). 15. HDAU. HDMI audio stream detection. "YES" means audio stream detected. "NO" means no audio stream present. Only displayed when HDMI source is selected. 16. Video Format. Gives information about the video format of the selected transmitter (480p30/720p60/1080i50/1080i60, etc...). Is applicable to both HDMI and CVI sources. 17. HD SW ID. Shows the HD DNM software version. 18. FPGA SW ID. Shows the FPGA software version (if present). 19. DFI SW ID. Shows the DFI software version (if present). 20. Standby uP SW ID. Shows the Standby Processor software version. (*) If an NVM IC is replaced or initialized, these items must be re-written to the NVM. ComPair will foresee in a possibility to do this. How to Exit To exit CSM, use one of the following methods: · Press the MENU button twice on the remote control transmitter. · Press the POWER button on the remote control transmitter. · Press the POWER button on the television set.
H_17740_028.eps 230108
Figure 5-5 CSM menu -1- (example)
H_17740_029.eps 230108
Figure 5-6 CSM menu -2- (example)
EN 24 5.3
5.3.1
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding 5.4
5.4.1
Service Tools
ComPair Introduction ComPair (Computer Aided Repair) is a Service tool for Philips Consumer Electronics 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 I2C or UART commands 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 TV
TO UART SERVICE CONNECTOR TO I2C SERVICE CONNECTOR TO UART SERVICE CONNECTOR
Error Codes
Introduction Error codes are required to indicate failures in the TV set. In principle a unique error code is available for every: · Activated protection. · Failing I2C device. · General I2C error. · SDRAM failure. The last five errors, stored in the NVM, are shown in the Service menu's. This is called the error buffer. The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that is not yet in the error code buffer, it is displayed at the left side and all other errors shift one position to the right. An error will be added to the buffer if this error differs from any error in the buffer. The last found error is displayed on the left. An error with a designated error code may never lead to a deadlock situation. This means that it must always be diagnosable (e.g. error buffer via OSD or blinking LED procedure, ComPair to read from the NVM). In case a failure identified by an error code automatically results in other error codes (cause and effect), only the error code of the MAIN failure is displayed. Example: In case of a failure of the I2C bus (CAUSE), the error code for a "General I2C failure" and "Protection errors" is displayed. The error codes for the single devices (EFFECT) is not displayed. All error codes are stored in the same error buffer (TV's NVM) except when the NVM itself is defective.
ComPair II RC in RC out
Multi function
5.4.2
How to Read the Error Buffer You can read the error buffer in 3 ways: · On screen via the SAM/SDM/CSM (if you have a picture). Example: ERROR: 0 0 0 0 0 : No errors detected ERROR: 6 0 0 0 0 : Error code 6 is the last and only detected error ERROR: 9 6 0 0 0 : Error code 6 was detected first and error code 9 is the last detected (newest) error · Via the blinking LED procedure (when you have no picture). See "The Blinking LED Procedure". · Via ComPair.
Optional Power Link/ Mode Switch Activity
I2C
RS232 /UART
PC
ComPair II Developed by Philips Brugge
HDMI I2C only
Optional power 5V DC
E_06532_036.eps 150208
Figure 5-7 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: 3122 785 91020. · ComPair UART interface cable: 3138 188 75051. · Program software can be downloaded from the Philips Service website. Note: If you encounter any problems, contact your local support desk. 5.3.2 LVDS Tool Support of the LVDS Tool has been discontinued.
Service Modes, Error Codes, and Fault Finding
5.4.3 Error Codes In case of non-intermittent faults, write down the errors present in the error buffer and clear the error buffer before you begin the repair. This ensures 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 and not the actual cause of the problem (for example, a fault in the protection detection circuitry can also lead to a protection).
Code Error Description Detection via: Type 0 1 2 3 4 5# 6 7 8 9 10 11 12 13 14 15 16 17 18 # No Error DC Protection +12V Failure -- -- -MT5382 (7A01) WT61P7 (7E23) N/A Remarks -- -- --
LC8.1U LA
5.
EN 25
5.5
5.5.1
The Blinking LED Procedure
Introduction The software is capable of identifying different kinds of errors. Because it is possible that more than one error can occur over time, an error buffer is available, which is capable of storing the last five errors that occurred. This is useful if the OSD is not working properly. Errors can also be displayed by the blinking LED procedure. The method is to repeatedly let the front LED pulse with as many pulses as the error code number, followed by a period of 1.5 seconds in which the LED is "off". Then this sequence is repeated. Example (1): error code 4 will result in four times the sequence LED "on" for 0.25 seconds / LED "off" for 0.25 seconds. After this sequence, the LED will be "off" for 1.5 seconds. Any RC5 command terminates the sequence. Error code LED blinking is in red color. Example (2): the content of the error buffer is "12 9 6 0 0" After entering SDM, the following occurs: · 1 long blink of 5 seconds to start the sequence, · 12 short blinks followed by a pause of 1.5 seconds, · 9 short blinks followed by a pause of 1.5 seconds, · 6 short blinks followed by a pause of 1.5 seconds, · 1 long blink of 1.5 seconds to finish the sequence, · The sequence starts again with 12 short blinks.
Protection DC_PROT = Low Protection POWER_DOWN = Low Protection Communication Error with WT61P7 Error Log Error Log Communication Error on I2C0 Bus Communication Error with MT8280
Stand-by Control- I2C0 Bus ler I2C General I2C MT8280 I2C System NVM I2C Tuner I2C0 Bus I2C0 Bus I2C0 Bus
Protection Communication Error with System NVM Communication Error with Tuner TDQU Communication Error with TDA9886 Communication Error with EC2S -- -- --- -- --- -- -Communication Error with Sil9185 R/W Error with DRAM1 or DRAM2 -- -- --- -- --- -- -Communication Error with MT5112 (reserved for BDS modules) Communication Error with Pro Idiom (reserved for BDS modules) Communication Error with BDS Bolt-On (reserved for BDS modules)
Tuner I2C Bus Error Log
IF/PLL Demodula- Tuner I2C Bus Error Log tor Ambilight FPGA Reserved Reserved Reserved HDMI Switch I2C MT8280 DRAM1 Reserved Reserved Reserved I2C0 Bus -- -- --- -- --- -- -I2C0 Bus DRAM R/W (7B02/03) -- -- --- -- --- -- -Error Log N/A N/A N/A Error Log Error Log N/A N/A N/A Error Log
5.5.2
Displaying the Entire Error Buffer Additionally, the entire error buffer is displayed when Service Mode "SDM" is entered. In case the TV set is in protection or Stand-by: The blinking LED procedure sequence (as in SDMmode in normal operation) must be triggered by the following RC sequence: "MUTE" "062500" "OK". In order to avoid confusion with RC5 signal reception blinking, this blinking procedure is terminated when a RC5 command is received.
Channel Decoder I2C0 Bus I2C Pro Idiom I2C I2C0 Bus
19 #
Error Log
21 #
Bolt-On NVM I2C
HDMI I2C0 Bus
Error Log
#
If IC/board available.
5.4.4
How to Clear the Error Buffer The error code buffer is cleared in the following cases: · By using the CLEAR command in the SAM menu: · If the contents of the error buffer have not changed for 50 hours, the error buffer resets automatically. Note: If you exit SAM by disconnecting the mains from the television set, the error buffer is not reset.
EN 26 5.6
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding
Table 5-2 NVM editor overview
Hex Address Value Store 0x000A 0x0000 Store? Dec 10 0 Description Existing value New value
Fault Finding and Repair Tips
Notes: · It is assumed that the components are mounted correctly with correct values and no bad solder joints. · Before any fault finding actions, check if the correct options are set. 5.6.4
Load Default NVM Values It is possible to download default values automatically into the NVM in case a blank NVM is placed or when the NVM first 20 address contents are "FF". After the default values are downloaded, it is possible to start-up and to start aligning the TV set. To initiate a forced default download the following action has to be performed: 1. Switch "off" the TV set with the mains cord disconnected from the wall outlet (it does not matter if this is from "Standby" or "Off" situation). 2. Short-circuit the SDM jumpers on the SSB (keep short circuited). 3. Press "P+" or "CH+" on the local keyboard (and keep it pressed). 4. Reconnect the mains supply to the wall outlet. 5. Release the "P+" or "CH+" when the set is started up and has entered SDM. When the downloading has completed successfully, the set should be into Stand-by, i.e. red LED on.
5.6.1
Software Protections Most of the protections and errors use either the stand-by or the micro processor 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. · 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 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.
Alternative method: It is also possible to upload the default values to the NVM with ComPair in case the SW is changed, the NVM is replaced with a new (empty) one, or when the NVM content is corrupted. After replacing an EEPROM (or with a defective/no EEPROM), default settings should be used to enable the set to start-up and allow the Service Default Mode and Service Alignment Mode to be accessed. 5.6.5 Display option code Caution: In case you have replaced the SSB, always check the display option code in SAM, even if you have picture. With a wrong display option code it is possible that you have picture, but that in certain conditions you have unwanted side-effects.
5.6.2
Hardware Protections The only real hardware protection in this chassis is (in case of an audio problem) the audio protection circuit that will trigger the uP to switch "off" the TV. Repair Tip · 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.
5.6.3
NVM Editor In some cases, it can be convenient if one directly can change the NVM contents. This can be done with the "NVM Editor" in SAM mode. With this option, single bytes can be changed. Caution: · Do not change these, without understanding the function of each setting, because incorrect NVM settings may seriously hamper the correct functioning of the TV set! · Always write down the existing NVM settings, before changing the settings. This will enable you to return to the original settings, if the new settings turn out to be incorrect.
Service Modes, Error Codes, and Fault Finding
5.6.6 Start-up/Shut-down Flowcharts On the next pages you will find start-up and shut-down flowcharts, which might be helpful during fault finding. POWER STATES In this chassis, there are six possible power states as follows: · Power OFF · ON · STANDBY · SEMI-STANDBY · Special Panel Mode · PROTECTION
LC8.1U LA
5.
EN 27
PROTECTION This state is entered when an error has been detected at startup or in the "ACTIVE" mode. All switched power supply lines are turned "off" with only +3V3stby remaining "on"; similar to "STANDBY" mode. This state is indicated by the blinking red front LED with the blinking sequence denoting the type of error detected. When the system enters the protection mode due to a critical error, it should be turned "off" and the failure cause needs to be resolved. The system will function normally again after performing a power recycling once all protection causing failures have been resolved. START-UP SEQUENCE There are two cases of start-up sequences, namely: · AC On and · Standby Wake-up
AC Mains OFF
Power OFF
AC Mains OFF AC Mains ON
AC Mains ON
See also figure on next page. AC ON In the case of start-up from AC mains, all PSU voltages start to turn "on" as the hardware default of the active "low" STANDBY (controlled by Standby Controller WT61P7's STANDBY signal) signal to the PSU is pulled "low" with respect to ground. The MT5382 starts running boot loader once the hardware reset circuit is released. The system will then check the last standby status from the system EEPROM to determine whether to complete the system start-up (load image, turn on the audio, display etc) or proceed to standby and wait for wakeup command from user. The Standby Controller then proceeds to verify the power status of the +12V and sends the system to protection in case of any failures. Special Panel, SDM, and PANEL modes are detected as well. System recovery is always handled by Standby Controller. Watchdog for MT5382 and MT8280 (if present) will be only enabled during startup, and these components are able to differentiate the normal startup and watchdog reset to trigger system reset when applicable. The alive checking mechanism kicks in after system startup is completed. STANDBY WAKEUP When the system receives a command to wake-up from standby, the Standby Controller sets the STANDBY signal "low" to turn "on" the switched power, and similarly detects for the presence of +12V. The MT5382 waits for +3V3_SW to be available before loading its image. The significance of this voltage detection is due to the flash is also being powered by the same mentioned voltage. The following figure shows the start-up flowchart for both "AC On" and "Standby Wake-up":
Special Panel Mode
SDM && Panel = LOW
Last Status = STANDBY
ERROR detected
ERROR detected
Last Status = ON WAKEUP Command Received
PROTECTION
ERROR detected
ON
STANDBY Command Manual Clock
Auto Clock
SEMISTANDBY (Clock Download)
STANDBY
PSU = STANDBY LED1 = OFF LED2 = BLINK
PSU = ON LED1 = ON LED2 = OFF
PSU = STANDBY LED1 = OFF LED2 = OFF
H_17740_033.eps 230108
Figure 5-8 Power States POWER OFF In "Power OFF" mode, the system is completely switched "off" from AC mains. When AC power is applied, the system checks for last status. Depending on the last standby status stored in the system EEPROM, this mode can then transit to "ON" or "STANDBY" mode. ON This is the normal operating mode, indicated by the "on" LED. All the power supply lines are available and depending on the sub-mode, all the circuits in the system may be active. From this mode it shall be possible to transit to "STANDBY", "SEMISTANDBY" and "PROTECTION" mode, or to "Power OFF" mode if AC mains are switched "off". The sub-modes are: · Active Mode (Normal Consumer Mode) · Service Modes · Panel Modes · Factory Modes STANDBY The total power consumption of the system in this mode shall be equal or less than 150 mW. This state is indicated by no LED when AC mains is switched "on". Only the standby controller WT61P7 is operational in this state, where only +3V3stby power supply is available. From this mode it shall be possible to transit to the "ACTIVE" or "Power OFF" mode if AC mains are switched "off". SEMI-STANDBY The semi-standby state is only accessed during transition from ACTIVE to STANDBY when the auto clock feature is switched "on". The clock information download is carried out in this state before proceeding to STANDBY. SPECIAL PANEL MODE The Special Panel Mode is only used during manufacturing process to program the system EEPROM. In this mode, the SDA0 and SCL0 ports of MT5382 are set to high impedance after SDM and PANEL pins are both detected as "low" during startup. This mode can be exited using a power recycle.
EN 28
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding
H_17740_034.eps 240108
Figure 5-9 Start-up flowchart
Service Modes, Error Codes, and Fault Finding
STANDBY SEQUENCE The following flowchart depicts the Standby (plus SemiStandby condition) sequence:
LC8.1U LA
5.
EN 29
START
Set Last Status = STANDBY
Disable RC/LKB Key
Set LED1 = OFF
Instruct WT61P7 to turn off LED1
Stop Backlight Dimming, PWM_DIMMING = 100%
Mute Audio, MUTEn = HIGH
Turn Off Backlight BACKLIGHT_ON_OFF = LOW
T~200ms
AUTO-CLOCK is ON?
Yes
SEMI-STANDBY
Enable RC/LKB Key
WT61P7
MT5382
Start to Obtain Clock Info from Selected Source
No
No
Clock Download Timeout = 3sec? Yes
No
Clock Download Complete?
No
Wakeup Event Received?
Yes
Yes
Disable RC/LKB Key
Switch off LVDS Signal
Set Last Status = ACTIVE
Wait for Panel_Off_Time_2 based on Panel ID in ms (from Panel Flash) Wait for Next Instruction from MT5382 Turn Off LVDS Power, LCD_PWR_ON = HIGH Disable RC/LKB Key Yes Proceed to STANDBY? PWM_Dimming = 0%
T~700ms
Instruct WT61P7 to turn on LED1
Turn On Backlight BACKLIGHT_ON_OFF = HIGH
No
Disable DC_PROT & POWER_DOWN INT Display Startup Logo for 1sec
Set LED1 = ON Pass Error Buffer, Clock Info and CEC Information to WT61P7 Set Back to Last Channel Instruct WT61P7 to go to Standby Unmute Audio, MUTEn = LOW
T~1300ms T~1200ms
WT61P7 STANDBYn = LOW
Yes WT61P7 blinks LED2 according to Error Buffer
STANDBY due to Protection?
Enable RC/LKB Key
No Note: Blocking for next startup to ensure PSU properly discharged END (Back to ON)
Wait 3000ms
END (STANDBY)
Note: Estimated running time. Actual implementation to be verified.
H_17740_035.eps 240108
Figure 5-10 Standby flowchart
EN 30
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding
POWERDOWN SEQUENCE The following figure shows the power-down sequence flowchart:
START
POWER_DOWN INT based on falling edge trigger
MT5382 Detects POWER_DOWN INT
Reconfirm POWER_DOWN = LOW?
Yes
Mute Audio Output No Write Protect Flash and System EEPROM Note: To Avoid False Triggering
Wait for impending Power Off
System Idle
END
H_17740_036.eps 240108
Figure 5-11 Power-down flowchart The power-down condition is detected by the MT5382 POWER_DOWN signal which is an interrupt pin. A "low" level on this line signifies that power-down is detected. The two major activities that occur over this operation is the muting of audio output and write protecting the system flash and EEPROM. DC PROTECTION The following figure shows the DC_PROT interrupt flowchart:
START
Check DC_PROT = LOW for 3 sec?
Yes
Mute Audio Output No DC Protection [Protection] Log Error Code Note: To Avoid False Triggering
Go to STANDBY
END
H_17740_037.eps 240108
Figure 5-12 DC Protection flowchart
Service Modes, Error Codes, and Fault Finding 5.7
5.7.1
LC8.1U LA
5.
EN 31
Software Upgrading
Introduction It is possible for the user to upgrade the main software via the USB port. This allows replacement of a software image in a stand alone set, without the need of an E-JTAG debugger. A description on how to upgrade the main software can be found in the DFU or on the Philips website.
application can be upgraded with the "autorun.upg" (FUS part in the one-zip file). This can also be done by the consumers themselves, but they will have to get their software from the commercial Philips website or via the Software Update Assistant in the user menu (see DFU). The "autorun.upg" file must be placed in the root of your USB stick. How to upgrade: 1. Copy "autorun.upg" to the root of your USB stick. 2. Insert USB stick in the side I/O while the set is in "On" mode. The set will restart and the upgrading will start automatically. As soon as the programming is finished, you will get the message that you can remove your USB stick and restart the set.
5.7.2
Main Software Upgrade Automatic Software Upgrade In "normal" conditions, so when there is no major problem with the TV, the main software and the default software upgrade
LC08SSp User software upgrade flow chart
Power off the set A newer version of software is detected. Do you want to upgrade? YES layout 1 NO Plug-in the USB stick
An equal/older version of software is detected. Do you want to proceed? Note: Should be done only if necessary. YES layout 2 NO
Power-on the set
Kindly remove the USB stick and restart the set.
Detect USB `break-in' and check autorun file
layout 3
Valid auto-run file? Y
N
Software update failed! Would you like to try again? YES layout 4 Y Display USB sw newer than the TV sw. Prompt user to confirm See layout 1 Y Display USB sw equal/older than TV sw. Prompt user to confirm See layout 2 NO Is USB sw version > set sw? N Is USB sw version =< set sw? N Content browser Photo & music
Content browser Photo & music
N
Proceed?
Y
Set re-start & Proceed with sw upgrade
Display upgrade progress
Prompt user to remove USB and restart the set See layout 3 End
Y
Successful?
N
Prompt user to try again?
See layout 4
N Retry?
Y
H_17740_038.eps 230408
Figure 5-13 SW upgrade flowchart
EN 32
5.7.3
5.
LC8.1U LA
Service Modes, Error Codes, and Fault Finding
Content and Usage of the One-Zip Software File Below you find a content explanation of the One-Zip file, and instructions on how and when to use it. · · · Ambi_clustername_version.zip. Not to be used by Service technicians. Panel_clustername_version.zip. Not to be used by Service technicians. EDID_clustername_version.zip. Contains the EDID content of the different EDID NVMs. See ComPair for further instructions. FUS_clustername_version.zip. Contains the "autorun.upg" which is needed to upgrade the TV main software and the software download application. ProcessNVM_clustername_version.zip. Default NVM content. Must be programmed via ComPair.
·
·
5.7.4
How to Copy NVM Data to/from USB Write NVM data to USB 1. Insert the USB stick into the USB slot while in SAM mode. 2. Execute the command "Copy to USB", to copy the NVM data to the USB stick. The NVM filename on the USB stick will be named "NVM2USB.bin" (this takes a couple of seconds). Write NVM data to TV 1. First, rename the filename (via a PC) on the USB stick to "USB2NVM.bin". 2. Insert the USB stick into the USB