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Color Television
Chassis
TC5.1L
CA
H_17480_000.eps 050707
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 Main Board 40-M134PH-MAG1XG 10 CRT Panel 13 Keyboard Panel 40-134SL6-KEA1XG Keyboard Panel 40-134SL6-KEA1XG 8. Alignments 15 9. Circuit Descriptions, Abbreviation List, and IC Data Sheets 18 10. Spare Parts List 24 11. Revision List 26
CBA 11-12 14 14 14
© 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 JY 0770 BU CD Customer Service
Printed in the Netherlands
Subject to modification
EN 3122 785 17480
EN 2
1.
TC5.1L CA
Technical Specifications, Connections and Chassis Overview
1. Technical Specifications, Connections and Chassis Overview
1.1 Technical Specifications
Tuning - technology Tuning - presets/channels Freq Bands TV Systems Off Air/ Cable TV Systems Multi Mains voltage Mains frequency Standby Power consumption Sound Systems Audio output (RMS) Scan Modes Sound Features Sound Control PLL 181 Full-Cable NTSC M (3.58 - 4.5) NTSC 90-140V 50/60Hz <1W BTCS SAP 2x5W 4:3 AVL, Mute 4 sound modes Balance Bass Boost Treble Boost, Volume American English, French, Spanish : Sleep timer : 75 Ohm (F type) : : : : : : : : : : : : : : : : : :
G_16340_002.eps 100306
Menu Languages Clock/Timer Function Terrestrial Antenna in
Figure 1-2 Rear audio and video connections Cinch: Video CVBS - Out, Audio - Out Ye - Video CVBS 1 VPP / 75 ohm Wh - Audio L 0.5 VRMS /10 kohm Rd - Audio R 0.5 VRMS / 10 kohm Cinch: Video YUV- In Gn - Video Y 1 VPP / 75 ohm Bu - Video U 0.7 VPP / 75 ohm Rd - Video V 0.7 VPP / 75 ohm Cinch: Audio - Out Rd - Audio - R Wh - Audio - L
1.2
1.2.1
Connection overview
Connections
kq kq kq
jq jq jq
0.5 VRMS / 10 kohm 0.5 VRMS / 10 kohm
kq kq
G_16340_001.eps 100306
Figure 1-1 Aerial connection Aerial - In - - F-type
H_17480_008.eps 050707
Coax, 75 ohm
D
Figure 1-3 Side audio and video connections S-Video (Hosiden): Video Y/C - In 1 - Ground Y Gnd 2 - Ground C Gnd 3 - Video Y 1 VPP / 75 ohm 4 - Video C 0.3 VPPP / 75 ohm Cinch: Video CVBS - In, Audio - In Ye - Video CVBS 1 VPP / 75 ohm Wh - Audio L 0.5 VRMS / 10 kohm Rd - Audio R 0.5 VRMS / 10 kohm
H H j j
jq jq jq
Technical Specifications, Connections and Chassis Overview 1.3 Chassis Overview
See Chapter 10, Parts List.
TC5.1L CA
1.
EN 3
EN 4
2.
TC5.1L CA
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 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.
2.1
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.
2.3
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 VDC). Discharge until the meter reading is 0 V (after approx. 30 s).
V
E_06532_007.eps 250304
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
2.4.1
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). 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
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:
·
·
Safety Instructions, Warnings, and Notes
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. 2.4.4
TC5.1L CA
2.
EN 5
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).
·
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 (= x10-6), nano-farads (n= x10-9), or pico-farads (p= x10-12). 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.
·
MODEL : 32PF9968/10
· · · ·
PROD.NO: AG 1A0617 000001
MADE IN BELGIUM 220-240V ~ 50/60Hz 128W VHF+S+H+UHF
S
Figure 2-2 Serial number example
BJ3.0E LA
E_06532_024.eps 130606
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. 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.
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.
P
b
Figure 2-3 Lead-free logo Due to lead-free technology some rules have to be respected by the workshop during a repair: · Use only lead-free soldering tin Philips SAC305 with order code 0622 149 00106. If lead-free solder paste is required, please contact the manufacturer of your soldering equipment. In general, use of solder paste within workshops should be avoided because paste is not easy to store and to handle. · Use only adequate solder tools applicable for lead-free soldering tin. The solder tool must be able: To reach a solder-tip temperature of at least 400°C. To 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
·
3.
TC5.1L CA
Directions for Use
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.
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
·
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
TC5.1L CA
5.
EN 7
5. Service Modes, Error Codes, and Fault Finding
5.1
5.1.1
Trouble Shooting
Can not Power On
Can not Power On
Is power supply for IC101 correct? If not, check Q820, Q821, Q007, Q008, D001 Check B+, +12V, Ok?
Fuse OK?
Y
Y Check Horizontal Scan circuit: Check H-Vcc and H-out of IC 101 Check Q401, T401 and Q411
N (1) Check if B+ shorted to earth. (2) To check whether D822 and R821 are turnoff. (3) To check whether D823 and R823 are turnoff. And whether C836 shorted.
N
Check standby circuit: Check Pin64 of IC101, Check Q825, Q824, Q823, Q822.
Is it IC801 Pin 1 shorted to earth? Y Check/Replace IC801
Is DB801 OK? N Y N
Replace DB801
Check the components such as C801, C802, C806, C807 and C815
G_16340_004.eps 100306
Figure 5-1 Can not Power On 5.1.2 No Raster, Sound OK
No Raster Sound OK
Is the power supply of Q401 and Q411 ok?
Y
Check Pin 13 (H-OUT) voltage ok?
Y
Check each output voltage of FBT
N
Is there any shorted in the scan part of the circuit?
N
Y
Change the shorted part.
N
Change IC101
To check whether R404, C401, T401, Q401, R422 are ok?
G_16340_005.eps 100306
Figure 5-2 No Raster, Sound OK 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
Y
Check C238, ok?
N
Y
Change IC901
Replace Q917
Replace C238
G_16340_008.eps 100306
Figure 5-3 Raster OK, Sound OK, No TV/AV picture
EN 8
5.1.4
5.
TC5.1L CA
Service Modes, Error Codes, and Fault Finding
Raster OK, Sound OK, No AV picture
Raster OK, Sound OK, No AV picture
Is the signal waveform at Pin 12 and Pin 14 of IC901 right?
N
To check whether R903, C903, R902 and R905, C908, R908 are ok?
Y
Check Q917, Q918, Q919, ok?
Y
Replace IC901
N
Replace the fail component.
G_16340_006.eps 100306
Figure 5-4 Raster OK, Sound OK, No AV picture 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
Y
Replace IC901
Check R234, Q204, R235, C229
G_16340_007.eps 100306
Figure 5-5 Raster OK, Sound OK, No TV picture 5.1.6 No picture, dense noise dots
No picture, dense noise dots Is the signal at Pin41, Pin42 of IC101 ok? Is the antenna feed line or the adapter broken?
N N
Y
Check/Replace IC101
Y
Is the signal at IF pin of the tuner ok?
N
Y
Check the relative circuit of Q101, Z141 etc
Handing the antenna fault
Is the signal at Pin SCL, SDA of tuner ok?
N
Y
Is the supply voltage of tuner ok?
N
Y
Check/Replace Tuner
Check signal at P5, P57, P58, P59, and P60 of IC101 and replace the abnormal relative circuit
Y
Check/Replace IC201, IC202, D101.
Check EEPROM
G_16340_009.eps 100306
Figure 5-6 No picture, dense noise dots
Block Diagrams, Test Point Overviews, and Waveforms
TC5.1U CA
6.
EN 9
6. Block Diagrams, Test Point Overviews, and Waveforms
Chassis Block Diagram
G_16340_010.eps 100306
Circuit Diagrams and CBA Layouts
TC5.1U CA
7.
EN 10
7. Circuit Diagrams and CBA Layouts
Main Board 40-M134PH-MAG1XG
H_17480_001.eps 041007
Circuit Diagrams and CBA Layouts
TC5.1U CA
7.
EN 11
Layout Main Board 40-M134PH-MAG1XG (Top Side)
H_17480_002.eps 041007
Circuit Diagrams and CBA Layouts
TC5.1U CA
7.
EN 12
Layout Main Board 40-M134PH-MAG1XG (Bottom Side)
H_17480_003.eps 041007
Circuit Diagrams and CBA Layouts
TC5.1U CA
7.
EN 13
CRT Panel
G_16340_014.eps 100306
Circuit Diagrams and CBA Layouts
TC5.1U CA
7.
EN 14
Layout CRT Panel
Keyboard Panel 40-134SL6-KEA1XG
H_17480_004.eps 041007
Layout Front IR Panel 40-134SL6-IRA1XG
G_16340_015.eps 150306
Layout CRT Panel
H_17480_005.eps 041007
G_16340_016.eps 130306
Alignments
TC5.1L CA
8.
EN 15
8. Alignments
8.1 How to Put the Set into Factory Mode
· · · · · Press the "D-MODE" button on the remote control. Press the "OK" button on the remote control. Press the "CH+" or the "CH-" button to select the parameter you want to adjust. Press the "VOL+" or the "VOL-" button to adjust the selected parameter. To put the new values into the memory, leave the factory mode with the "D_MODE" button on the remote control.
8.2
Adjustment of the B+ (BAT) voltage
1. Apply the Philips standard test pattern to the RF input. 2. Connect a DC voltmeter (range >200 V) to pins 1 (GND) and 3 (+) of S804 [1]. 3. Adjust potentiometer VR802 [2] in STANDARD mode in such a way the voltage reading is 130 +/- 0.5 V.
2
1 2
H_17480_006.eps 051007
Figure 8-1 Test pin & potentiometer position
8.3
RF AGC Alignment:
Q101
C1 33pF
D2 TO CRO 1N60 D1 1N60 C2 100pF R1 100k
1. Connect a test circuit as depicted in figure "Test circuit". 2. Apply an 8-scale gray signal (80 dBV). 3. Adjust the AGC data until the output of the test circuit becomes 0.4 V (p-p) ±0.05 V. 4. Change the 8-scale gray signal to 60 dBV. 5. The shown value of CRO should be the same as while receiving the 80 dBV signal. If not, repeat step 3 and 4 until the results for 60 dBV and 80 dBV input signal are the same.
H_17480_007.eps 050707
Figure 8-2 Test circuit
EN 16 8.4
8.
TC5.1L CA
Alignments
value). It should give the maximum peak white value in MASA, sufficing the local dooming synchronously.
Screen & Focus Voltage Adjustment
1. Apply the test pattern signal in normal status. 2. Enter the Factory mode 3. Press the "TV/AV" button to stop the vertical scan (Note: the RC/GC/BC is preset to 80, GD/BD to 40) 4. Adjust the SCREEN potentiometer on the line output transformer in such a way the horizontal line is just visible on the screen. 5. Turn on the vertical output, and adjust the "FOCUS" potentiometer on the line output transformer in such a way the focus is maximized.
8.5
White Balance Adjustment (NORMAL)
1. 2. 3. 4. 5. 6. 7. Choose a white pattern 27 IRE (192.8 mV) Measure the picture with a color analyzer. Adjust RC, GC and BC. Choose a white pattern 67 IRE (478.57 mV). Measure the picture with a color analyzer. Adjust GD and BD. Repeat all previous steps until you get the right color on both dark and bright picture. 8. Adjust RC-C, GC-C, BC-C, GD-C and BD-C for Cool color temperature. 9. Adjust RC-W, GC-W, BC-W, GD-W and BD-W for Warm color temperature. See figure "Color temperature settings" for reference. Table 8-1 Color temperature settings
Picture Mode Cool Normal Warm Color Temperature (K) 12000 ±15% 9300 ±10% 6500 ±15% uv 0.000 ±0.005 0.000 ±0.004 0.000 ±0.005 Y 90 ±15% 90 ±15% 90 ±15%
8.6
Adjustment of Sub-brightness
1. Apply the Grey-scale/Color bar (NTSC signal) to the AV input, in normal status. 2. Enter Factory alignment menu 5. 3. Select BRTC. 4. Adjust the sub-brightness, until the 2nd dark bar of 8 level Grey scales can just be seen.
8.7
Picture Geometry Adjustment
1. Apply the Philips standard testing pattern in normal status. 2. Then enter menu 3. 3. Adjust the following data to get the minimum distortion: a. HPOS6 (Horizontal Centre). b. PARA6 (Level). c. TRAP6 (Trapezium). d. HSIZE6 (Horizontal Size). e. CNRT6 (Top). f. CNRB6 (Bottom). 4. Apply the Philips standard testing pattern in normal status. 5. Enter menu 3. 6. Adjust the following data to get the minimum distortion: a. HIGH6 (Height). b. VP60 (Vertical Center). c. VLIN6 (Linearity). d. VSC6 (Vertical-S Correction).
8.8
The Peak White Adjustment
In Sports status, apply the peak white signal with a 14x14 cm window to the AV input (Brightness = 52, Contrast = 98). Enter factory alignment menu 5, select SCNT to adjust the subcontrast until the spec of the window is 255 ±10 Nit (reference
Alignments 8.9 Initialization
Put the set into "Factory Mode" (see "How to Put the Set into Factory Mode", the first item of this chapter). Press the "SOUND" button, the screen displays "WAIT". When the screen displays FGSFGSFGSFG "OK", the initialization is finished. Table 8-2 EEPROM Data EEPROM data
FAC 01 RC* 80 FAC 02 HIGH6* 1B FAC 03 HPOS5 0C FAC 03 HPOS6* 0F FAC 04 CNTX 7F FAC 05 BRTC* 40 FAC 06 ST3 20 FAC 07 MOD1 20 FAC 08 RFAGC* 25 FAC 09 V01 46 FAC 10 MODE4 32 FAC 11 MPB-STR 43 FAC 12 SVM 05 FAC 13 CLTM 4B FAC 14 HAFC 09 FAC 16 RC-W 00 FAC 18 S-COL 15 FAC 20 SEG-PO INT1 SEG-POINT2 DATA-VL 173 FAC 21 T-Hz120 BAS 1C FAC 23 B-Hz120-BAS B-Hz500-TRE B-Hz1K5 12 1C 0C B-Hz5K 0C B-Hz10K 0C - T-Hz500 TRE 5C - T-Hz1K5 0C T-Hz5K 0C T-Hz10K 0C C-Hz120BAS 39 FAC 24 COMB1 00 COMB2 05 COMB3 00 407 01 DATA-VH 02 DATA-UF 08 SPE-POS1 06 SPE-DATA1 05 FAC 22 C-Hz500 TRE 54 - C-Hz1K5 0C SENSI-ON 00 S-BRI 32 S-CON 44 S-SHP 46 GC-W 02 BC-W 07 GD-W F6 BD-W E3 FAC 19 M-COL 19 M-BRI 37 M-CON 4B M-SHP 50 YUVGC 03 YUVBC 03 AGCC 1C NOIS 01 ONTM 08 NSHP 1A PVLVL 80 PLMT 80 CLVO 4B CLVS 4B ABL 27 DCBS 14 FLG0 82 FLG1 0D FAC 15 RC-C 00 FAC 17 D-COL 20 SVM1 05 OSD2 20 OSDF2 64 PYNX 28 PYNN 18 PYXS 22 PYNS 10 MODE5 0B MPB-HMC 0D MODE6 1F MPB-HP 07 MODE7 D7 MPB-LP 11 MODE8 2D MPB-LIM 00 MODE9 02 SUB-FRE 28 SUB-HP 02 VOL-MAI 01 V25 5A V50 6D V100 76 VOLMAX 32 CURTCEN A5 GATE 2A COL-OUT 73 BRTS 00 OSD 21 OSDF 53 CCD OSD 4A CCD OSDF 65 TXCN 1F RGCN 16 MOD2 B0 MOD3 70 OPT 37 OPTM1 C0 OPTM2 00 HDCNT 00 HSTOP FF SV3 20 SV4 19 SVD 19 ASSH 07 SHPN 10 SHPN 2A COLC 2C COLP 00 SCOL 07 SCNT 05 CNTC 67 TNTCT 40 TNTCV 40 CNTN 08 BRTX 27 BRTN 42 COLX 35 COLN 00 TNTX 28 TNTN 28 PARA6* 1D TRAP6* 23 HSIZE6* 21 CNRT6* 05 CNRB6* 07 VEHT6 03 HEHT6 03 PARA5 10 TRAP5 29 HSIZE5 13 CNRT5 0A CNRB5 06 VEHT5 03 HEHT5 03 VP60* 03 VLIN6* 0C VSC6* 0D VBLK6 00 VCEN6 2A GC* 80 BC* 80 GD* 40 BD* 40 FAC 02 HIGH5 13 VP50 03 VLIN5 0A
TC5.1L CA
8.
EN 17
8.10 EEPROM Data:
Note: although all items are adjustable, we only recommend to adjust the items with an asterisk (*). The other items are adjustable as well, but we strongly discourage adjusting them.
VSC5 0C
VBLK5 00
VCEN5 18
GC-C FC D-BRI 34
BC-C FB D-CON 62
GD-C 06 D-SHP 64
BD-C 0E
SENSI -OFF 00 C-Hz1K 0C AV GAIN 19 C-Hz10K 0C OPTM3 08
EN 18
9.
TC5.1L CA
Circuit Descriptions, Abbreviation List, and IC Data Sheets
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.1
9.1.1
Brief Introduction of the Chassis
Chassis block diagram
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Figure 9-1 Chassis block diagram 9.1.2 Power Supply Section This section mainly consists of · IC STR-W6735 (IC801). · Transformer (T803). · Bridge rectifier (DB801). · Accessory circuits. The supply voltage for this chassis should be AC 110V. The allowed voltage range is 90V to 140V, the frequency range is 50/60Hz. The AC power with high/low frequency interference goes through an RC filter, consisting of C801, T801, C802, R801, and T802. The filter removes the high/low frequency interference. Then DB801 transforms the AC power to DC power. T803 and IC 801 work in standby state. T803 will provide a power voltage to IC101. IC101 scans for the "KEY IN" signal (Pin 3 of IC101) from the ON/OFF switch on the keyboard. If "KEY IN" = "power on" signal, pin 64 (IC101) will generate a signal to drive the photo coupler (IC8021). It acts as a feed back circuit (feed back to Pin 6 of IC801) for controlling IC801 to adjust MOSFET. Transformer T803 provides the following voltages: · +13V voltage from Pin16. · · · +130V (B+) voltage from Pin1. +12V from Pin 15. Pin 15 is also connected to two Positive Voltage Regulators (IC201, IC202) in-series. The outputs of these regulators are +9V and +5V respectively. The picture below shows IC201 and IC202:
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Figure 9-2 IC 201/202
Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.1.3 Tuning Section This section mainly consists of the tuner (TU101), the IF preamplifier circuit and the SAWFILTER. Table 9-1 Tuning section 1
Pin 1 2 3 4 5 6 7 8 BP BT IF Supply voltage tuner section +5V Supply voltage tuning section +31V Intermediate frequency out Symbol AGC AS SCL SDA Description Auto gain control I2C bus address select I2C bus serial clock I2C bus serial data
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Figure 9-3 Pre-amplifier circuit 9.1.4 Sound Process Section The SIF signal is sent out together with the TV signal from Pin30 of IC101. It passes through Q203, R225. X202 and a High-pass filter (consisting of C254, L206, C253) filters out the video signal and low frequency interference.
Table 9-2 Short specification of the tuner
Receiving Channel Receiving System Intermediate Frequency VHF LOW BAND: CH2~B(55.25~127.25MHz) VHF HIGH BAND: CH C~CH W+11(133.25~361.25MHz) CH W+12~69(367.25~801.25MHz) NTSC Picture carrier: 47.74MHz Colour carrier: 42.17MHz Sound carrier: 41.25MHz
Antenna Input Unbalanced 75Ohms Impedance Output Imped- Unbalanced 75Ohms ance Band change- Digital change by PLL IC over system
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From Pin58 of IC101 the I2C bus clock signal goes to the tuner. The tuner works during the clock time. IC101 will send out a data signal from Pin57 to control the tuner's working state by controlling the +33V voltage. +33V is provided from Pin10 of T803. That voltage is put into the tuner at Pin7. A circuit inside the tuner transforms +33V into a voltage between 0 and +33V (as a function of the data, sent by IC101). The AGC signal is a close loop control voltage that keeps the amplitude of the signal constant. Output of tuner is the Intermediate Frequency signal (IF signal). The IF signal will pass pre-amplifier circuit (refer to the picture below). The amplified IF signal passes the SAW filter and is then sent to IC101 Pin41/42. IC101 creates a CVBS signal and sends it out from Pin30. CVBS will be selected by IC901, and then pass from Pin13 of IC901 to Pin20/24 if IC101. IC101 will demodulate the CVBS signal into an R, G, B signal. Next IC101 will send this R, G, B signal from Pin50/51/52 to the CRT board.
Figure 9-4 Sound process section 1 SIF will be finally sent into Pin2 of IC1001. An analog automatic gain control circuit (AGC) allows a wide range of input levels. The analog-to-digital conversion of the IF sound signal is done by an A/D-converter. The high pass filter, formed by a coupling capacitor at SIF_IN1+ suppresses video components. IC1001 is controlled via the I2C bus slave interface. The AV sound signal will be directly sent to Pin37/38 or Pin40/ 41 of IC1001. Q901/2 and Q903/4 form Emitter-Follower circuits to provide a better load ability. The (analog) sound signal will go from Pin26/27 of IC1001 to Pin4/12 of IC602. IC602 is a dual bridge amplifier. The output voltage of IC602 drives the speakers. The volume is adjusted via the I2C bus.
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Figure 9-5 Sound process section 2
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9.1.5
9.
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Circuit Descriptions, Abbreviation List, and IC Data Sheets
TV Processor IF · Integrated PIF VCO, aligned automatically · Negative demodulation PIF · Multi-frequency SIF demodulator, without external tankcoil Video · Integrated chroma traps · Black stretch · Y-gamma Chroma · Integrated chroma BPF's · PAL/NTSC/SECAM demodulation RGB/Base-band · Integrated 1 H base-band delay line · Base-band TINT control · Internal OSD interface · Half-tone and transparent for OSD · External YCbCr interface for DVD · RGB cut-off/drive controls by bus · ABCL (ABL and ACL combined) Synchronization · Integrated fH x 640 VCO · DC coupled vertical ramp output (single) · EW correction with EHT output · Sync out
Vertical Output Section This section mainly consists of IC301 (TDA8172), the Vertical Coil and the related circuit. The supply voltage of IC301 are +14V and -14V. These two voltages are provided by the LOT section. For the vertical scan, IC101 creates a Saw-tooth waveform at Pin16. This is the input signal of IC301. The main task of IC101 is to create the vertical scan waveform. The output signal of IC301 drives the Vertical Coil. If IC301 works in normal state, Pin6 will send a square-signal to maintain a high voltage at D214. If it does not, D214 will get a low voltage, Pin2 of IC101 senses this change and IC101 sends out a standby signal.
9.1.6
Horizontal Output and LOT Section The horizontal drive pulse is a square wave. IC101 creates this waveform at Pin13. Via Q401 the signal goes to the input of Q411. Q411 is a horizontal output triode with a damper inside. The signal from Pin C of Q411 drives the Horizontal Coil. When Q411 goes into cut-off state, a sub-coil inside the LOT will generate an EHT by inductance.
9.2
9.2.1
IC description
Main IC (IC101) Description: The main IC is a TMPA8857CSNG, provided by TOSHIBA. It is an integrated circuit, suited for PAL, NTSC and SECAM TV. An MCU and a TV signal processor are integrated in a 64 pin DIP package. The MCU contains an 8-bit CPU, ROM, RAM, I/O-ports, timer/ counters, A/D-converters, an on-screen display controller, remote control interfaces, IIC bus interfaces, and the closed caption decoder. The TV signal processor contains PIF, SIF, Video, multistandard chroma, deflection, and RGB processors. Features: MCU: · High speed 8-bit CPU · 12 I/O ports · I2C bus interface (multi-master) · 14-bit PWM output, 1 channel, for a voltage synthesizer · 7-bit PWM output, 1 channel · 8-bit A/D converter, 3 channels · Remote control signal preprocessor · Two 16-bit internal timer/counters, 2 channels · Two 8-bit internal timer/counters, 2 channels · Time base timer · Watchdog timer · 16 interrupt sources: 5 external, 11 internal · Stop and Idle power saving modes CCD decoder · Digital data slicer for NTSC OSD · Clock generation for OSD display · Font ROM characters: 384 characters · Characters display: 32 columns x 12 lines · Composition: 16 x 18 dots · Size of character: 3 (line by line) · Color of character: 8 (character by character) · Display position: H 256 / V 512 steps · BOX function · Fringing, smoothing, italic, underline function · Conform to CCD regulation · Jitter elimination
Circuit Descriptions, Abbreviation List, and IC Data Sheets
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Figure 9-6 Block Diagram Main IC 1
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Circuit Descriptions, Abbreviation List, and IC Data Sheets
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Figure 9-7 Block Diagram Main IC 2 9.2.2 Vertical Deflection Booster (IC 301) The STV8172A is a vertical deflection booster, designed for TV and monitor applications. This device, supplied with up to 35 V, provides a maximum output current of 2.5 A, to drive the vertical deflection yoke. The internal fly back generator delivers fallback voltages of up to 75 V.
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Figure 9-8 Vertical Deflection Booster
Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.2.3 Demultiplexer (IC 901) The HCF4052B is a monolithic integrated circuit, fabricated in Metal Oxide Semiconductor technology, available in DIP and SOP packages. The HCF4052B analog multiplexer/demultiplexer is a digitally controlled analog switch, having low ON impedance, and very low OFF leakage current. This multiplexer circuit dissipates extremely low quiescent power over the full supply voltage range, independent of the logic states of the control signals. When a logic "1" is present at the inhibit input, all channels are off. This device is a differential 4-channel multiplexer, having 2 binary control inputs, A and B, and an inhibit input. The two binary input signals select 1 of 4 pairs of channels to be turned on and connect the analog inputs to the outputs.
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Pin No. Pin Name 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
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Short Description Digital power supply +5 V Digital ground I2S2 data input
DVSUP DVSS I2S_DA_IN2 RESETQ NC NC VREF2 DACM_R DACM_L NC VREF1 SC1_OUT_R SC1_OUT_L NC AHVSUP CAPL_M AHVSS AGNDC SC2_IN_L SC2_IN_R ASG SC1_IN_L SC1_IN_R VREFTOP MONO_IN AVSS IN IN IN IN IN OUT OUT OUT OUT IN
Power-on-reset Not connected Not connected Reference ground 2 High-voltage part Loudspeaker out, right Loudspeaker out, left Not connected Reference Ground 1 High voltage part Audio 1 output, right Audio 1 output, left Not connected Analog power supply 8.0V Volume capacitor MAIN Analog ground Analog reference voltage High-voltage part Audio 2 input, left Audio 2 input, right Analog shield Ground Audio 1 input, left Audio 1 input, right Reference voltage IF A/D converter Mono input Analog ground
34 35 36 37 38 39 40 41 42 43 44 9.2.5
Figure 9-9 Demultiplexer Table 9-3 Demultiplexer
PIN 1 and 2 3 4 and 5 6 7 8 9 10 11 and 12 13 14 and 15 16 Symbol Y CHANNELS IN/OUT COMMON "Y" OUT/IN Y CHANNELS IN/OUT INH VEE VSS B A X CHANNELS IN/OUT COMMON "X" OUT/IN X CHANNELS IN/OUT VDD
Dual Bridge Amplifier (IC 602) The TDA7266SA is a dual bridge amplifier, specially designed for LCD monitor, PC motherboard, TV, and portable radio applications.
9.2.4
Sound Processor (IC1001) Table 9-4 Sound Processor Pin No. Pin Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 AVSUP ANA_IN+ ANA_INTESTEN XTAL_IN XTAL_OUT TP D_CTR_I/O_1 IN/OUT D_CTR_I/O_0 IN/OUT ADR_SEL STANDBYQ I2C_CL I2C_DA I2S_CL I2S_WS I2S_DA_OUT I2S_DA_IN1 ADR_CL IN IN IN/OUT IN/OUT IN IN IN IN OUT Type Short Description Analog power supply +5V IF Input 1 IF common Test pin Crystal oscillator Crystal oscillator Test pin D_CTR_I/O_1 D_CTR_I/O_0 I2C BUS address select Stand-by (Low-active) I2C clock I2C data I2S clock I2S word strobe I2S data output I2S1 data input ADR clock Figure 9-10 Dual Bridge Amplifier
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Spare Parts List
10. Spare Parts List
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Figure 10-1 Spare Parts Table 10-1 Spare Parts List ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 NAME Side AV PWB S/T Screw W 3 X 10 AB Speaker Speaker Rubber Cushion S/T Screw W 3 X 14 HS Side AV Inlay Plate Model NO. S/T Screw F 3 X 10 BT Rear AV Inlay S/T Screw B 4 X 20 AB Rear Cabinet Cushion (25mm X 7mm) S/T Screw W 3 X 10 AB Main Board Main Board Bracket CRT Screw HA 6 X 30 Metal Cushion CRT Fibre Sheet S/T Screw W 3 X 10 AB Key Board S/T Screw W 3 X 10 AB QTY. 1 2 2 8 4 1 1 2 1 8 1 2 3 1 1 4 4 1 4 6 1 4 MGT Push Button MGT KEY Board & Front Cabinet MGT CRT & Front Cabinet MGT Main Board MGT Rear and Front Cabinet MGT Rear AV Jack MGT Speaker MGT Side AV PWB. REMARK
Spare Parts List
ITEM 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 NAME Push Button S/T Screw W 3 X 10 AB Lens Decorative Piece for Power Knob Power Knob Power Spring Logo Front Cabinet S/T Screw W 3 X 10 AB S/T Screw W 3 X 10 AB Cushion (25mm X 7mm) Power Line Block Guide Rail (Left) CRT Support Guide Rail (Right) QTY. 1 1 1 1 1 1 1 1 4 4 2 1 1 2 1
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REMARK MGT Lens
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MGT CRT Support MGT Guide Rail
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11.
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Revision List
11. Revision List
Manual xxxx xxx xxxx.0 · First release.