philips TC5.1L CB Service Manual

Color Television Chassis
TC5.1L
H_17510_000.eps
021107
Contents Page
1. Technical Specifications, Connections and Chassis Overview 2
2. Safety Instructions, Warnings, and Notes 4
3. Directions for Use 6
4. Mechanical Instructions 6
5. Service Modes, Error Codes, and Fault Finding 7
6. Block Diagrams, Test Point Overviews, and
Waveforms
Chassis Block Diagram 9
7. Circuit Diagrams and CBA Layouts Diagram CBA Main Board 01-29PT6457/44-MA1 10 12 Main Board 01-29PT6457/55-MA1 11 12 CRT Panel 13 14 Side I/O Panel 40-TB59PH-SIA1XG 14 Layout Front IR Panel 40-TB59PH-FBB1XG 14 Layout BTSC Panel 40-TB59PH-MPB1XG 14
8. Alignments 15
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets 18
10. Spare Parts List 24
11. Revision List 27
©
Copyright 2007 Philips Consumer Electronics B.V. Eindhoven, The Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by WS 0770 BU CD Customer Service Printed in the Netherlands Subject to modification EN 3122 785 17510
EN 2 TC5.1L CB1.
Technical Specifications, Connections and Chassis Overview

1. Technical Specifications, Connections and Chassis Overview

1.1 Technical Specifications

Tuning - technology : PLL Tuning - presets/channels : 181 Freq Bands : Full-Cable TV Systems Off Air/ Cable : NTSC M (3.58 - 4.5) TV Systems Multi : NTSC Mains voltage : 180-240V
(29PT6457/44) : 100-120V : (29PT6457/55)
Mains frequency : 50/60Hz Power consumption : 90W (29PT6457/44)
Standby Power consumption : <3W (29PT6457/44)
Sound Systems : BTCS SAP Audio output (RMS) : 2x5W Scan Modes : 4:3 Sound Features : AVL, Mute Sound Control : 4 sound modes
Menu Languages : American English,
Clock/Timer Function : Sleep timer Terrestrial Antenna in : 75 Ohm (F type)

1.2 Connection overview

1.2.1 Connections

: 95W (29PT6457/55)
: <1W (29PT6457/55)
: Balance : Bass Boost : Treble Boost, : Volume
French, Spanish
Figure 1-2 Rear audio and video connections
Cinch: Video CVBS - Out, Audio - Out
Ye - Video CVBS 1 V Wh - Audio L 0.5 V Rd - Audio R 0.5 V
/ 75 ohm kq
PP
/10 kohm kq
RMS
/ 10 kohm kq
RMS
Cinch: Video YUV- In
Gn - Video Y 1 V Bu - Video U 0.7 V Rd - Video V 0.7 V
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 75 ohm jq
PP
Cinch: Audio - Out
Rd - Audio - R 0.5 V Wh - Audio - L 0.5 V
/ 10 kohm kq
RMS
/ 10 kohm kq
RMS
G_16340_002.eps
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G_16340_001.eps
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Figure 1-1 Aerial connection
Aerial - In
- - F-type Coax, 75 ohm D
H_17480_008.eps
050707
Figure 1-3 Side audio and video connections
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
P / 75 ohm j
PP
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
Technical Specifications, Connections and Chassis Overview

1.3 Chassis Overview

See Chapter 10, Parts List.
EN 3TC5.1L CB 1.
EN 4 TC5.1L CB2.
Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

Index of this chapter:

2.1 Safety Instructions

2.2 Maintenance Instructions

2.3 Warnings

2.4 Notes

2.1 Safety Instructions
Safety regulations require the following during a repair:
Connect the set to the Mains/AC Power via an isolation transformer (> 800 VA).
Replace safety components, indicated by the symbol h, only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.
Wear safety goggles when you replace the CRT.
Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points:
General repair instruction: as a strict precaution, we advise you to re-solder the solder connections through which the horizontal deflection current flows. In particular this is valid for the:
1. Pins of the line output transformer (LOT).
2. Fly-back capacitor(s).
3. S-correction capacitor(s).
4. Line output transistor.
5. Pins of the connector with wires to the deflection coil.
6. Other components through which the deflection current
flows.
Note: This re-soldering is advised to prevent bad connections due to metal fatigue in solder connections, and is therefore only necessary for television sets more than two years old.
Route the wire trees and EHT cable correctly and secure 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, to prevent the cord from touching the CRT, hot components, or heat sinks.
Check the electrical DC resistance between the Mains/AC Power plug and the secondary side (only for sets that have a Mains/AC Power isolated power supply):
1. Unplug the Mains/AC Power cord and connect a wire
between the two pins of the Mains/AC Power plug.
2. Set the Mains/AC Power switch to the "on" position
(keep the Mains/AC Power cord unplugged!).
3. Measure the resistance value between the pins of the
Mains/AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 Mohm and 12 Mohm.
4. Switch "off" the set, and remove the wire between the
two pins of the Mains/AC Power plug.
Check the cabinet for defects, to prevent touching of any inner parts by the customer.
2.2 Maintenance Instructions
We recommend a maintenance inspection carried out by qualified service personnel. The interval depends on the usage conditions:
When a customer uses the set under normal circumstances, for example in a living room, the recommended interval is three to five years.
When a customer uses the set in an environment with higher dust, grease, or moisture levels, for example in a kitchen, the recommended interval is one year.
The maintenance inspection includes the following actions:
1. Perform the “general repair instruction” noted above.
2. Clean the power supply and deflection circuitry on the chassis.
3. Clean the picture tube panel and the neck of the picture tube.
2.3 Warnings
In order to prevent damage to ICs and transistors, avoid all high voltage flashovers. In order to prevent damage to the picture tube, use the method shown in figure “Discharge picture tube”, to discharge the picture tube. Use a high voltage probe and a multi-meter (position V until the meter reading is 0 V (after approx. 30 s).
V

Figure 2-1 Discharge picture tube

All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD w). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential. Available ESD protection equipment: – Complete kit ESD3 (small tablemat, wristband,
connection box, extension cable and earth cable) 4822 310 10671.
– Wristband tester 4822 344 13999.
Be careful during measurements in the high voltage section.
Never replace modules or other components while the unit is switched "on".
When you align the set, use plastic rather than metal tools. This will prevent any short circuits and prevents circuits from becoming unstable.
2.4 Notes

2.4.1 General

Measure the voltages and waveforms with regard to the chassis (= tuner) ground (H), or hot ground (I), depending on the tested area of circuitry. The voltages and waveforms shown in the diagrams are indicative. Measure them in the Service Default Mode (see chapter 5) with a color bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or
61.25 MHz for NTSC (channel 3).
Where necessary, measure the waveforms and voltages with (D) and without (E) aerial signal. Measure the voltages in the power supply section both in normal operation (G) and in stand-by (F). These values are indicated by means of the appropriate symbols.
The semiconductors indicated in the circuit diagram and in the parts lists, are interchangeable per position with the
). Discharge
DC
E_06532_007.eps
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Safety Instructions, Warnings, and Notes
EN 5TC5.1L CB 2.
semiconductors in the unit, irrespective of the type indication on these semiconductors.
Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the “double-D symbol”, are trademarks of Dolby Laboratories.

2.4.2 Schematic Notes

All resistor values are in ohms, and the value multiplier is often used to indicate the decimal point location (e.g. 2K2 indicates 2.2 kohm).
Resistor values with no multiplier may be indicated with either an "E" or an "R" (e.g. 220E or 220R indicates 220 ohm).
All capacitor values are given in micro-farads (μ= x10 nano-farads (n= x10
Capacitor values may also use the value multiplier as the decimal point indication (e.g. 2p2 indicates 2.2 pF).
An "asterisk" (*) indicates component usage varies. Refer to the diversity tables for the correct values.
The correct component values are listed in the Spare Parts List. Therefore, always check this list when there is any doubt.

2.4.3 Rework on BGA (Ball Grid Array) ICs

General
Although (LF)BGA assembly yields are very high, there may still be a requirement for component rework. By rework, we mean the process of removing the component from the PWB and replacing it with a new component. If an (LF)BGA is removed from a PWB, the solder balls of the component are deformed drastically so the removed (LF)BGA has to be discarded.
-9
), or pico-farads (p= x10
-12

2.4.4 Lead-free Solder

Philips CE is producing lead-free sets (PBF) from 1.1.2005 onwards.
Identification: The bottom line of a type plate gives a 14-digit serial number. Digits 5 and 6 refer to the production year, digits 7 and 8 refer to production week (in example below it is 1991 week 18).
MODEL :
-6
),
).
PROD.NO:
Regardless of the special lead-free logo (which is not always indicated), one must treat all sets from this date onwards according to the rules as described below.
32PF9968/10
AG 1A0617 000001
Figure 2-2 Serial number example
MADE IN BELGIUM
220-240V 50/60Hz
~
128W
VHF+S+H+UHF
BJ3.0E LA
S
E_06532_024.eps
130606
P
b
Figure 2-3 Lead-free logo
Device Removal
As is the case with any component that is being removed, it is essential when removing an (LF)BGA, that the board, tracks, solder lands, or surrounding components are not damaged. To remove an (LF)BGA, the board must be uniformly heated to a temperature close to the reflow soldering temperature. A uniform temperature reduces the risk of warping the PWB. To do this, we recommend that the board is heated until it is certain that all the joints are molten. Then carefully pull the component off the board with a vacuum nozzle. For the appropriate temperature profiles, see the IC data sheet.
Area Preparation
When the component has been removed, the vacant IC area must be cleaned before replacing the (LF)BGA. Removing an IC often leaves varying amounts of solder on the mounting lands. This excessive solder can be removed with either a solder sucker or solder wick. The remaining flux can be removed with a brush and cleaning agent. After the board is properly cleaned and inspected, apply flux on the solder lands and on the connection balls of the (LF)BGA. Note: Do not apply solder paste, as this has been shown to result in problems during re-soldering.
Device Replacement
The last step in the repair process is to solder the new component on the board. Ideally, the (LF)BGA should be aligned under a microscope or magnifying glass. If this is not possible, try to align the (LF)BGA with any board markers. So as not to damage neighboring components, it may be necessary to reduce some temperatures and times.
More Information
For more information on how to handle BGA devices, visit this URL: www.atyourservice.ce.philips.com (needs subscription, not available for all regions). After login, select “Magazine”, then go to “Repair downloads”. Here you will find Information on how to deal with BGA-ICs.
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 clean the solder-joint from old tin and re-solder with new tin.
Use only original spare-parts listed in the Service-Manuals. Not listed standard material (commodities) has to be purchased at external companies.
Special information for lead-free BGA ICs: these ICs will be delivered in so-called "dry-packaging" to protect the IC against moisture. This packaging may only be opened shortly before it is used (soldered). Otherwise the body of the IC gets "wet" inside and during the heating time the structure of the IC will be destroyed due to high (steam-) pressure inside the body. If the packaging was opened before usage, the IC has to be heated up for some hours (around 90°C) for drying (think of ESD-protection!).
Do not re-use BGAs at all!
EN 6 TC5.1L CB3.
Directions for Use
For sets produced before 1.1.2005, containing leaded soldering tin and components, all needed spare parts will be available till the end of the service period. For the repair of such sets nothing changes.
In case of doubt whether the board is lead-free or not (or with mixed technologies), you can use the following method:
Always use the highest temperature to solder, when using SAC305 (see also instructions below).
De-solder thoroughly (clean solder joints to avoid mix of two alloys).
Caution: For BGA-ICs, you must use the correct temperature­profile, which is coupled to the 12NC. For an overview of these profiles, visit the website www.atyourservice.ce.philips.com (needs subscription, but is not available for all regions) You will find this and more technical information within the "Magazine", chapter "Repair downloads". For additional questions please contact your local repair help desk.

2.4.5 Alternative BOM identification

In September 2003, Philips CE introduced a change in the way the serial number (or production number, see Figure 2-1) is composed. From this date on, the third digit in the serial number (example: AG2B0335000001) indicates the number of the alternative BOM (Bill of Materials used for producing the specific model of TV set). It is possible that the same TV model
on the market is produced with e.g. two different types of displays, coming from two different O.E.M.s. By looking at the third digit of the serial number, the service technician can see if there is more than one type of B.O.M. used in the production of the TV set he is working with. He can then consult the At Your Service Web site, where he can type in the Commercial Type Version Number of the TV set (e.g. 28PW9515/12), after which a screen will appear that gives information about the number of alternative B.O.M.s used. If the third digit of the serial number contains the number 1 (example: AG1B033500001), then there is only one B.O.M. version of the TV set on the market. If the third digit is a 2 (example: AG2B0335000001), then there are two different B.O.M.s. Information about this is important for ordering the correct spare parts! For the third digit, the numbers 1...9 and the characters A...Z can be used, so in total: 9 plus 26 = 35 different B.O.M.s can be indicated by the third digit of the serial number.

2.4.6 Practical Service Precautions

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

3. Directions for Use

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

4. Mechanical Instructions

See Chapter 10, Parts List.
Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

5.1 Trouble Shooting

5.1.1 Can not Power On

EN 7TC5.1L CB 5.
Can not Power On
Fuse OK?
(1) Check if B+ shorted to earth. (2) To check whether D822 and R821 are
N
(3) To check whether D823 and R823 are
Is it IC801 Pin 1 shorted to earth?
Y
Check/Replace IC801

5.1.2 No Raster, Sound OK

No Raster Sound OK
Check B+,
Y Y
turnoff.
turnoff. And whether C836 shorted.
+12V, Ok?
N
Is DB801 OK?
NN
Y
Check the components such as C801, C802, C806, C807 and C815
Is power supply for IC101 correct? If not, check Q820, Q821, Q007, Q008, D001
Check Horizontal Scan circuit: Check H-Vcc and H-out of IC 101 Check Q401, T401 and Q411
Check standby circuit: Check Pin64 of IC101, Check Q825, Q824, Q823, Q822.
Replace DB801
Figure 5-1 Can not Power On
G_16340_004.eps
100306
Is the power supply of Q401 and Q411 ok?
N
To check whether R404, C401, T401, Q401, R422 are ok?
Check Pin 13 (H-OUT) voltage ok?
Y
Is there any shorted in the scan part of the circuit?
Change IC101
Y
N
Y
N

5.1.3 Raster OK, Sound OK, No TV/AV picture

Raster OK, Sound OK, No TV/AV picture
Check whether Q917 is ok?
N
Replace Q917
Y Y
Replace C238
N
Check each output voltage of FBT
Change the shorted part.
G_16340_005.eps
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Figure 5-2 No Raster, Sound OK
Change IC901 Check C238, ok?
G_16340_008.eps
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Figure 5-3 Raster OK, Sound OK, No TV/AV picture
EN 8 TC5.1L CB5.

5.1.4 Raster OK, Sound OK, No AV picture

Raster OK, Sound OK, No AV picture
Service Modes, Error Codes, and Fault Finding
Is the signal waveform at Pin 12 and Pin 14 of IC901 right?
Y
Check Q917, Q918, Q919, ok?
N
Replace the fail component.

5.1.5 Raster OK, Sound OK, No TV picture

Raster OK, Sound OK, No TV picture
Is the signal waveform at Pin 15 of IC901 right?
N
To check whether R903, C903, R902
N
and R905, C908, R908 are ok?
Replace IC901
Y
G_16340_006.eps
100306
Figure 5-4 Raster OK, Sound OK, No AV picture
Replace IC901
Y
Check R234, Q204, R235, C229

5.1.6 No picture, dense noise dots

No picture, dense noise dots
Is the antenna feed line or the adapter broken?
Y
Handing the antenna fault
N
Is the signal at Pin SCL, SDA of tuner ok?
Check signal at P5, P57, P58,
P59, and P60 of IC101 and replace the abnormal relative circuit
Figure 5-5 Raster OK, Sound OK, No TV picture
Is the signal at Pin41, Pin42 of IC101 ok?
N
Is the signal at IF pin of the tuner ok?
N
N N
Y
Check/Replace
Y
IC101
Check the relative circuit of Q101,
Y
Z141 etc
Is the supply voltage of tuner ok?
Y
Check/Replace IC201, IC202, D101.
G_16340_007.eps
100306
Check/Replace Tuner
Y
Check EEPROM
G_16340_009.eps
Figure 5-6 No picture, dense noise dots
100306
Block Diagrams, Test Point Overviews, and Waveforms

6. Block Diagrams, Test Point Overviews, and Waveforms

Chassis Block Diagram

EN 9TC5.1L CB 6.
* /44 sets use STR-W6756
H_17510_009.eps
021107
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