IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Philips Consumer Electronics Company** Equipment. The service procedures recommended by Philips and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose.
FIRE AND SHOCK HAZARD 1. Be sure all components are positioned in such a way as to avoid the possibility of adjacent component shorts. This is especially important on those chassis which are transported to and from the service shop. 2.
LEAKAGE CURRENT COLD CHECK 1. Unplug the ac line cord and connect a jumper between the two prongs of the plug. 2. Turn on the power switch. 3. Measure the resistance value between the jumpered ac plug and all exposed cabinet parts of the receiver, such as screw heads, antennas, and control shafts.
TV SAFETY NOTES SAFETY CHECKS After the original service problem has been corrected, a complete safety check should be made. Be sure to check over the entire set, not just the areas where you have worked. Some previous servicer may have left an unsafe condition, which could be unknowingly passed on to your customer.
The use of a substitute part which does not have the same safety characteristics as the Philips recommended replacement part shown in this service manual may create shock, fire, or other hazards.
PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) Some semiconductor solid state devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices, Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD).
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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 –...
Technical Specifications, Connections, and Chassis Overview Note: Described specifications are valid for the whole product range. Note: Figures below can deviate slightly from the actual situation, due to different set executions. Technical Specifications Reception Feature Data Tuning system : PLL Color systems : NTSC Sound systems...
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Feature Data Mains voltage range : 90 - 140 V_ac Mains frequency : 60 Hz Ambient conditions: Feature Data Temperature range : +5 to +45 deg. C Maximum humidity : 90 % R.H. Power consumption: Feature Data Normal operation : from 79 W (20”) : to 119 W (32”) Standby : <...
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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, Ye= Yellow. Top Control and Front / Side Connections Figure: Top control and Front / Side connections...
Mechanical Instructions Index of this chapter: 1. Set Disassembly 2. Service Position 3. Assembly/Panel Removal 4. Set Re-assembly Note: Figures below can deviate slightly from the actual situation, due to different set executions. Set Disassembly Warning: Be sure to disconnect the AC power from the set before opening it. Rear Cover 1.
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1. Disconnect the degaussing coil [1]. 2. Release the two fixation clamps (at the mid left and mid right side of the bracket), and remove the bracket from the bottom tray, by pulling it backwards [2]. 3. Turn the chassis tray 90 degrees counter clockwise. 4.
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1. Remove the complete module from the bottom plate, by pulling the two fixation clamps upward [1], while sliding the module away from the CRT [2]. Note: these clamps are difficult to access. 2. Release the two fixation clamps [3] at the side of the bracket, and lift the panel out of the bracket (it hinges at one side).
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LTI/CTI Interface Panel Removal Remove the LTI/CTI Interface panel from the Mono Carrier, by disconnecting it from connector 1212. Top Control Assembly/Panel Removal 1. Remove the two fixation screws. 2. Push the assembly a little bit upwards, and then pull it backwards to release it from the front hinge.
Set Re-assembly To re-assemble the whole set, do all processes in reverse order. Note: before you mount the rear cover, perform the following checks: 1. Check whether the AC power cord is mounted correctly in its guiding brackets. 2. Check whether all cables are replaced in their original position...
Service Modes, Error Codes, and Fault Finding Index of this chapter: 1. Test Points 2. Service Modes 3. Problems and Solving Tips (related to CSM) 4. ComPair 5. Error Codes 6. The Blinking LED Procedure 7. Protections 8. Repair Tips Test Points This chassis is equipped with test points in the service printing.
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Table: Test point overview Test point Circuit Diagr. F508, F535, F536, F537, F552, F561, F563, F573, F664, I513, I518, I519, Power supply I524, I531, I533, I546 F401, F412, F413, F414, F418, F452, Line & Frame F453, F455, F456, F458, F459, F460, Deflection F461, I408, I416, I417, I420, I462, I468 F003, F004, I001, I002...
Service Modes Service Default mode (SDM) and Service Alignment Mode (SAM) offers several features for the service technician, while the Customer Service Mode (CSM) is used for communication between the call center and the customer. This chassis also offers the option of using ComPair, a hardware interface between a computer and the TV chassis.
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Table: Software cluster overview SW Cluster SW name UOC Type Features 9352 L4LUS1 L04US1_x.y TDA12000 CC+BTSC 88557 9352 L4LUS1 L04US1_x.y TDA12001 CC+BTSC+CMB+DW 89557 9352 L4LUS1 L04US1_x.y TDA12001 CC+BTSC+CMB 35557 U= USA (NAFTA), S= Stereo dBx, CC= Closed Caption, BTSC= Broadcast Television Systems Committee,...
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Service Default Mode (SDM) Purpose To create a predefined setting for measurements to be made. • To override software protections. • To start the blinking LED procedure. • Specifications Tuning frequency: 61.25 MHz (channel 3). • Color system: NTSC M. •...
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How to enter To enter 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 jumper wires 9252 and 9275 on the family board (see Fig.
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How to navigate Use one of the following methods: When you press the MENU button on the remote control, the set will switch on • the normal user menu in the SDM mode. On the TV, press and hold the VOLUME DOWN and press the CHANNEL •...
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Figure: SAM menu Menu explanation 1. LLLLL. This represents the run timer. The run timer counts normal operation hours, but does not count standby hours. 2. AAABCD-X.Y. This is the software identification of the main microprocessor: A = the project name (L04). §...
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3. SAM. Indication of the Service Alignment Mode. 4. Error Buffer. Shows all errors detected since the last time the buffer was erased. Five errors possible. 5. Option Bytes. Used to set the option bytes. See “Options” in the Alignments section for a detailed description.
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How to navigate In SAM, select menu items with the MENU UP/DOWN keys on the remote • control transmitter. The selected item will be highlighted. When not all menu items fit on the screen, use the MENU UP/DOWN keys to display the next / previous menu items.
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Customer Service Mode (CSM) Purpose The Customer Service Mode shows error codes and information on the TV's operation settings. The call center can instruct the customer (by telephone) to enter CSM in order to identify the status of the set. This helps the call center to diagnose problems and failures in the TV set before making a service call.
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Menu explanation 1. Indication of the decimal value of the operation hours counter, Software identification of the main microprocessor (see 'Service Default or Alignment Mode' for an explanation), and the service mode (CSM= Customer Service Mode). 2. Displays the last five errors detected in the error code buffer. 3.
Problems and Solving Tips Related to CSM Picture Problems Note: The problems described below are all related to the TV settings. The procedures used to change the value (or status) of the different settings are described. Picture too dark or too bright The picture improves when you have press the AUTO PICTURE button on the •...
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White line around picture elements and text The picture improves after you have pressed the AUTO PICTURE button on the remote control transmitter, Then: 1. Press the AUTO PICTURE button on the remote control transmitter repeatedly (if necessary) to choose PERSONAL picture mode. 2.
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Black and white picture The picture improves after you have pressed the AUTO PICTURE button on the • remote control transmitter, Then: 1. Press the AUTO PICTURE button on the remote control transmitter repeatedly (if necessary) to choose PERSONAL picture mode. 2.
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8. The new PERSONAL preference value is automatically stored. ComPair Introduction ComPair (Computer Aided Repair) is a service tool for Philips Consumer Electronics products. ComPair is a further development on the European DST (service remote control), which allows faster and more accurate diagnostics. ComPair has three big advantages: •...
Specifications ComPair consists of a Windows based faultfinding program and an interface box between PC and the (defective) product. The ComPair interface box is connected to the PC via a serial or RS232 cable. In this chassis, the ComPair interface box and the TV communicate via a bi-directional service cable via the service connector.
Beside fault finding, ComPair provides some additional features like: Up- or downloading of pre-sets. • Managing of pre-set lists. • Emulation of the Dealer Service Tool (DST). • If both ComPair and SearchMan (Electronic Service Manual) are installed, all the •...
7. Plug the mains adapter in a mains outlet, and switch the interface “on”. The green and red LEDs light up together. The red LED extinguishes after approx. 1 second while the green LED remains lit. 8. Start the ComPair program and read the “Introduction” chapter. Figure: ComPair Interface connection How To Order ComPair order codes:...
Error Codes 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.
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Make sure the menu item CLEAR is highlighted. Use the MENU § UP/DOWN buttons, if necessary. Press the MENU RIGHT button to clear the error buffer. The text on the § right side of the “CLEAR” line will change from “CLEAR?” to “CLEARED” If the contents of the error buffer have not changed for 50 hours, the error buffer •...
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Error Device Error description Check item Diagram 3466, Vertical guard 7451, Not applicable protection 7452, 7453, 7454 I2C error while 1000, Tuner communicating with 5010, (PIP 2nd tuner Module) Not applicable +5v protection 7604, 7605 A5 7200, I2C bus General I2C error 3207, 3214 Not applicable - Not applicable -...
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Error Device Error description Check item Diagram I2C error while TDA9178T/N1 communicating with 7610 LTI module I2C error while TDA9887 communicating with 7201 PIP_Demodulator Not applicable - Not applicable - I2C error while communicating with TDA1200x 7200 SSD stereo sound decoder I2C error while communicating with...
The Blinking LED Procedure Using this procedure, you can make the contents of the error buffer visible via the front LED. This is especially useful when there is no picture. When the SDM is entered, the front LED will blink the contents of the error-buffer: When all the error-codes are displayed, the sequence finishes with a LED blink of •...
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To get a quick diagnosis the chassis has three service modes implemented: The Customer Service Mode (CSM). • The Service Default Mode (SDM). • The Service Alignment Mode (SAM). • For a detailed mode description, see the relevant sections. Fault Finding and Repair Tips Notes: It is assumed that the components are mounted correctly with correct values and •...
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Address Value NAFTA Region (dec) (hex) Last Hue (VID PP others) Last Colour Temperature (VID PP others) White-D Cool Red White-D Cool Blue White-D Normal Red White-D Normal Green White-D Normal Blue White-D Warm Red White-D Warm Blue Last Volume Last Balance Last Treble (AUD PP others) Last Bass (AUD PP others)
Power Supply Set Not Working Figure: Fault finding tree “Set not working”...
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Set Does Not Start Up Figure: Fault finding tree “Set does not start up”...
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Deflection One Thin Vertical Line Quick check: Set in protection mode. • LED blinking with error “3”. • Figure: Fault finding tree “One thin vertical line”...
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One Thin Horizontal Line Quick check: Set in protection mode. • LED blinking with error “2”. • Figure: Fault finding tree “One thin horizontal line”...
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Blank Screen Figure: Fault finding tree “Blank screen”...
Source Selection Set is not able to go into AV or any missing AV is encountered E.g. AV1 is available but not able to enter to AV1: Check if the option setting is correct. Set is able to go to AV, but no audio is heard. 1.
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6. If Tuner IF is present and yet still no picture in RF mode, go to Video Processing troubleshooting section. No Picture, No Sound Figure: Fault finding tree “No picture, no sound”...
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Picture Ok, No Sound Figure: Fault finding tree “Picture ok, no sound”...
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Unable To Perform Tuning Figure: Fault finding tree “Unable to perform tuning”...
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Controller Below are some guidelines for troubleshooting of the Micro Controller function. Normally Micro Controller should be checked when there is a problem of startup. 1. Check that both +3.3 V_dc and +1.8 V_dc are present. 2. Check that crystal oscillator is working. 3.
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4. If signal is not available, try checking the BRIGHTNESS and/or CONTRAST control, and make sure it is not at zero. 5. If still with the correct settings and no video is available, proceed to the CRT/RGB amplifier diagram. For sets with TDA9178, follow steps below: 1.
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Audio Processing No Sound Figure: Fault finding tree “No sound”...
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No RF audio for QSS/Inter-Carrier stereo sets. 1. Check pin 99 and 100 for SIF signal (for QSS) or pin 104 and 105 for video with SIF (for Inter-Carrier) 2. If signal is not present, check for the QSS/FMI bit settings. Check also the NVM data.
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Alignments Index of this chapter: 1. General Alignment Conditions 2. Hardware Alignments 3. Software Alignments and Settings Note: The Service Default Mode (SDM) and Service Alignment Mode (SAM) are • described in chapter 5 “Service Modes, ...”. Menu navigation is done with the CURSOR UP, DOWN, LEFT, or RIGHT keys of •...
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Hardware Alignments Figure: Top view family board...
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Vg2 Adjustment 1. Activate the SAM. 2. Go to the WHITE TONE sub menu. 3. Set the values of NORMAL RED, GREEN and BLUE to “32”. 4. Go, via the MENU key, to the normal user menu and set 5. SATURATION/COLOR to “0”. 6.
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Figure: V_cutoff waveform Focusing 1. Tune the set to a circle or crosshatch test pattern (use an external video pattern generator). 2. Choose picture mode NATURAL (or MOVIES) with the SMART PICTURE button on the remote control transmitter. 3. Adjust the FOCUS potentiometer (see figure “Top view family board”) until the vertical lines at 2/3 from east and west, at the height of the centerline, are of minimum width without visible haze.
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Software Alignments and Settings Figure: Service Mode overview...
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Enter the Service Alignment Mode (see also chapter 5 “Service Modes, ..”). To enter SAM, use one of the following methods: Press the following key sequence on the remote control transmitter: “062596' • directly followed by the OSD/STATUS button (do not allow the display to time out between entries while keying the sequence).
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How to calculate the value of an Option Byte Calculate an Option Byte value (OP1 .. OP7) in the following way: Check the status of the single option bits (OB): are they enabled (1) or disabled • (0). When an option bit is enabled (1) it represents a certain value (see column “Bit •...
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Table: Option code overview per model (OP1 - OP4) 25PT6341/85 26PW6341/37 27MS6341/37 27PT5441/37 27PT6441/37 28PW6341/85 29PT6441/44 29PT6441/85 Bit Byte_1 (OP1) Philips Tuner FM Radio ATS(EU) UK PNP Virgin Mode China Decimal...
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Table: Option code overview per model (OP1 - OP4) (continued) 29PT6541/44 29PT6541/85 30PW6341/37 32MS6341/37 32PT5441/37 32PT6441/37 32PW6341/85 33PT5441/85 Bit Byte_1 (OP1) Philips Tuner FM Radio ATS(EU) UK PNP Virgin Mode China Decimal...
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Table: Option code overview per model (OP5 - OP7) 25PT6341/85 26PW6341/37 27MS6341/37 27PT5441/37 27PT6441/37 28PW6341/85 29PT6441/44 29PT6441/85 Bit Byte_5 (OP5) SVHS2 SVHS3 Hotel Mode Decimal...
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25PT6341/85 26PW6341/37 27MS6341/37 27PT5441/37 27PT6441/37 28PW6341/85 29PT6441/44 29PT6441/85 Bit Byte_6 (OP6) Personal Zapping FM Trap Combfilter Active Control Video Text Light Sensor Dual Text Decimal...
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25PT6341/85 26PW6341/37 27MS6341/37 27PT5441/37 27PT6441/37 28PW6341/85 29PT6441/44 29PT6441/85 Bit Byte_7 (OP7) Time Win1 Decimal...
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Table: Option code overview per model (OP5 - OP7) (continued) 29PT6541/44 29PT6541/85 30PW6341/37 32MS6341/37 32PT5441/37 32PT6441/37 32PW6341/85 33PT5441/85 Bit Byte_5 (OP5) SVHS2 SVHS3 Hotel Mode Decimal...
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29PT6541/44 29PT6541/85 30PW6341/37 32MS6341/37 32PT5441/37 32PT6441/37 32PW6341/85 33PT5441/85 Bit Byte_6 (OP6) Personal Zapping FM Trap Combfilter Active Control Video Text Light Sensor Dual Text Decimal...
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29PT6541/44 29PT6541/85 30PW6341/37 32MS6341/37 32PT5441/37 32PT6441/37 32PW6341/85 33PT5441/85 Bit Byte_7 (OP7) Time Win1 Decimal...
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Option Byte 1 (OP1) OB17: PHILIPS TUNER • 0 : ALPS / MASCO compatible tuner is in use. § 1 : Philips compatible tuner is in use. § OB16: FM RADIO • 0 : FM radio feature is disabled or not applicable.
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0 : Soft clipping is disabled. § 1 : Soft clipping is enabled. § OB26: GREEN UI • 0 : Green UI is disabled (for Philips brand). § 1 : Green UI is enabled (for Magnavox brand). § Note: only for NAFTA region. §...
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OB21: PIP PHILIPS TUNER • 0 : ALPS / MASCO compatible tuner is in use for PIP module. § 1 : Philips compatible tuner is in use for PIP module. § OB20: HUE • 0 : Hue/Tint Level is disabled or not applicable.
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OB35: PIP SPLITTER • 0 : Normal Tuner in PIP § 1 : Splitter in PIP § Note: Only for EU/AP region. For PIP sets and build in with Splitter in PIP § tuner. OB34: SPLITTER • 0 : Normal Tuner for main chassis §...
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OB45: ULTRA BASS • 0 : Ultra Bass is disabled or not applicable. § 1 : Ultra Bass is enabled. § Default setting is “0”. § OB44: DELTA VOLUME • 0 : Delta Volume Level is disabled or not applicable. §...
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OB55: AV3 • 0 : Side/Front AV3 source is not present. § 1 : Side/Front AV3 source is present. § OB54: CVI • 0 : CVI source is not available. § 1 : CVI source is available. § OB53: SVHS2 •...
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OB65: FM TRAP • 0 : FM Trap is not present. § 1 : FM Trap is present. § Note: Only for LATAM region. § OB64: COMBFILTER • 0 : 3D-combfilter is not present. § 1 : 3D-combfilter is present. §...
OB75: Reserved • Default setting is “0”. § OB74: Reserved • Default setting is “0”. § OB73: Reserved • Default setting is “0”. § OB72 Reserved • Default setting is “0”. § OB71 Reserved • Default setting is “0”. § OB70: Reserved •...
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Byte_1 (Pin Usage) Not Used WideScreen Rotation Uir Msg SPI I2C Not Used Not Used Decimal Byte_2 (Devices) SCAVEM Comb Filter OSD FRONT Radio Tuner "None-00, Philips-01, Alps-10" Decimal...
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Byte_3 (Devices) Not Used Soft Clipper Not Used Not Used SmartPort Active-Off LED "None-00, 4136-01, 34836-10" Decimal "Byte_4 (AV, Tuning)" Not Used AV3YC AV2YC Decimal...
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Byte_5 (Feature) ITV Ring Protection WatchDog No Ident Standby Buzzer Type "None=00, Internal=01, External=10" Clock Type "None-00, OSD-01, LED-10" Decimal Byte_6 (Power) Not Used Not Used Not Used Not Used Not Used Not Used Card POR Not Used Decimal...
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Tuner Note: Described alignments are only necessary when the NVM (item 7601) is replaced. IF PLL This adjustment is auto-aligned. Therefore, no action is required. AGC (AGC take over point) 1. Set the external pattern generator to a color bar video signal and connect the RF output to aerial input.
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White Tone In the WHITE TONE sub menu, the values of the black cut off level can be adjusted. Normally, no alignment is needed, and you can use the given default values. The color temperature mode (NORMAL, COOL and WARM) and the color (R, G, and B) can be selected with the UP/DOWN RIGHT/LEFT cursor keys.
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1. Connect an external video pattern generator to the aerial input of the TV-set and input a crosshatch test pattern. Set the generator amplitude to at least 1 mV and set frequency to 61.25 MHz (channel 3). 2. Set 'Smart Picture' to NATURAL (or MOVIES). 3.
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Vertical Service blanking (SBL). Switch the blanking of the lower half of the screen “on” or • “off” (to be used in combination with the vertical slope alignment). Vertical Shift (VSH). Align the vertical centering so that the test pattern is located •...
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Alignment Default values UCP (EW upper corner parabola) LCP (EW lower corner parabola) VSH (Vertical Shift) VS (Vertical slope) VAM (Vertical amplitude) VSC (Vertical S-Correction) Audio No alignments are needed for the audio sub menu. Use the given default values. QSS (Quasi Split Sound) For NICAM/2CS sound system (EU/AP, except for AP-NTSC), set to “On”.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets Index of this chapter: 1. Introduction 2. Power Supply 3. Deflection 4. Control 5. Tuner and IF 6. Source Selection 7. Audio 8. Video 9. Abbreviations 10. IC Data Sheets Notes: Only new circuits compared to the M8 (L01.1 for other regions) chassis are •...
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Introduction The 'L04' chassis is a global TV chassis for the model year 2004 and is used for TV sets with large screen sizes (from 21 to 36 inch), in Super Flat and Real Flat executions (both in 4:3 and 16:9 variants). There are three types of CRT namely the 100 degrees, 110 degrees and Wide Screen CRT.
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The standard architecture consists of a Main panel (called 'family board'), a Picture Tube panel, a Side I/O panel, and a Top Control panel. The Main panel consists primarily of conventional components with some surface mounted devices in the audio and video processing part.
Power Supply Block Diagram Figure: Block diagram power supply Stdby_con signal The Hercules generates this signal. This line is logic “low” (0 V) under normal operation and in semi-Standby of the TV, and is “high” (3.3 V) during Standby. Power_down signal The AUX SMPS generates this signal.
B (Hercules port) This port is used to switch the AUX SMPS output V_aux “On/Off”. This is required for DVD and iDTV (for future extensions). Timing Diagrams Power ON - To Standby - Out of Standby - Power OFF Figure: Timing diagram Standby...
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Power ON - To Semi Standby - Out of Semi Standby - Power OFF Figure: Timing diagram Semi Standby Startup Sequence When the set is connected to the AC power, the rectified line voltage (via winding 4-5 of L5531 connected to pin 14 of IC7531) will start the internal voltage source to charge the V_cc capacitor (C2532).
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Table: Pinning overview TEA1523 Pin Symbol Description This pin is Ground of the IC. This pin is connected to the supply voltage. An internal current charges the V_cc capacitor (2532), and the start-up sequence is initiated when this V_cc voltage reaches a level of 9.5 V. Note: The output power is disabled when the voltage gets below 9 V (UVLO).
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As C2532 of IC7531 is charged, it will also start to charge the V_cc capacitor (C2511) of IC7511. Via resistor R3519 and C2511, the TEA1506 starts to switch as soon as the V_cc voltage reaches the V_cc start level of is about 11 V. The V_cc voltage is automatically taken over by the main transformer L5512 (winding 2-3) when the V_cc is high enough (when this voltage is even higher than the voltage on C2511, there is no current flow from C2532 to C2511 due to diode D6512).
Standby Mode In this mode, IC7511 (TEA1506) will be totally disabled. So there is no voltage on the main transformer output. But IC7531 (TEA1523) will still work and will provide the necessary output voltages (6V -> 5V, 3.3V, 3V -> 1.8V) to the Hercules (IC7200). Table: PSU voltage overview Voltage Normal operation...
There is a current source inside the UOC at pin 102. This pumps energy in the capacitor connected to this pin producing a pure saw tooth. The vertical drive signals and the E/W correction signal are derived. Pin 108 is the East-West drive (or AVL), and it is a single ended current output. The correction for “horizontal width for changed EHT”...
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Basic Principle During a scan period, either the Line Transistor or diode(s) conduct to ensure a constant voltage over the deflection coil (that results in a linear current). During the flyback period, the Line Transistor stops conducting, and the flyback capacitor(s) together with the inductance of the deflection coil creates oscillation.
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of the LOT, the Line Transistor cannot stop conducting immediately. After the Line Transistor is out of conduction, the flyback pulse is created. The flyback capacitor charges until the current in the deflection coil reduce to zero. Then it discharges through the deflection coil and the deflection current increases from the other direction.
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To prevent this from happening, a circuit called Mannheim-circuit is added. This consists of C2415, R3404, R3417 and D6406. During the scan, C2415 is charged via R3417. During the flyback, the S-correction parabola across the S-Cap C2417/C2418 is in its most negative, and D6406 conducts. Thus, C2415 is switched in parallel to C2417/C2418 during flyback.
LCP: Lower Corner Parabola. • EWT: East West Trapezium. • The East-West drive circuit realizes them all. The settings can be changed by a remote control. All changed data will be stored into the NVM after the geometry alignment. Panorama For Wide Screen sets, the S-correction of the picture has to adapt between the different picture modes.
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VideoSupply (+200V from primary side of LOT): This supplies the RGB amplifier • and Scavem circuit at the CRT panel. Notes: The V_T voltage (to tuner) is drawn from V_batt. • The EHT voltage is generated by the Line Output Transformer (LOT). The Focus •...
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When the BCL pin voltage goes to 2.8 V, the Hercules will start to limit • CONTRAST gain. When it reaches 1.7 V, then the BRIGHTNESS gain limit will start to react. • When BCL pin voltage goes to 0.8 V, the RGB will be blanked. •...
During switch-off, the H_out frequency is doubled immediately and the duty cycle is set to 25% fixed, during 43 ms. The RGB outputs are driven “high” to get a controlled discharge of the picture tube with 1 mA during 38 ms. This will decrease the EHT to about half the nominal value (= safety requirement).
Vertical Deflection The Frame stage consists fully of discrete components. This has the advantage for better flash behavior than when an IC was used. The Frame differential drive signal from the Hercules comes from a current source. Resistors R3460 and R3461 convert them into a voltage, and feed them into the differential amplifier TS7455 and TS7456.
Tilt and Rotation The rotation control signal is a PWM output from the UOC. It is filtered by R3252, R3246, R3259 and C2259. The DC voltage after filtering at C2259 will be amplified by R3245 (Main Board) and R3390 (CRT panel). The output stage functions similarly as in M8/L01.1 with rotation IC TDA8941P.
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In this chassis the SCAVEM signal is different from its predecessor because the Hercules generates the differential SCAVEM signal inside the IC. The supply of the SCAVEM is taken from V_bat through a 1k5 / 5 W resistor. Compared with the M8/L01.1, this has the advantage of getting better performance for the pattern with tremendous SCAVEM current (like V_sweep).
The Micro Controller ranges in ROM from 128 kB with no TXT-decoder to 128 kB with a 10 page Teletext or with Closed Caption. Block Diagram The block diagram of the Micro Controller application is shown below. Figure: Micro Controller block diagram Basic Specification The Micro Controller operates at the following supply voltages: +3.3 V_dc at pins 33, 125, and 19.
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Pin Configuration and Functionality The ports of the Micro Controller can be configured as follows: A normal input port. • An input ADC port. • An output Open Drain port. • An output Push-Pull port. • An output PWM port. •...
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Table: LED signal diversity LED Europe NAFTA LATAM Standby Standby Normal brighter lighted lighted Normal LED 'off' Normal LED 'off' Standby dimmer SCL. This is the clock wire of the two-wire single master bi-directional I2C bus. • SDA. This is the data wire of the two-wire single master bi-directional I2C bus. •...
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Light Sensor. This pin is configured as ADC input for the Light Sensor. • Sel_SC2_Interface. This pin is use to switch between the SC2_CVBS_OUT and • the INTF_CVBS_OUT for the SCART_2_CVBS_OUT/ MONITOR_OUT signal. 0: Hercules CVBS Output (default) § 1: Interface CVBS Output §...
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“high” or “low” for the reset of 1.8 V in case there is a corruption in the Hercules. Tuner and IF The tuner used in this chassis comes from two sources, from Philips and from Alps. Both tuner sources have the same pin configuration so they are 1 to 1 compatible except for the software, which will be selected by means of Option Settings.
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The SAW filter used, depends on the application concept (whether it is a QSS concept or an Intercarrier): OFWM3953M for QSS Video. • OFWK9656M for QSS Audio. • OFWM1971M for Intercarrier. • Pin Assignments and Functionality Pin assignment of the Tuner: Table: Pinning Tuner Pin Pin Description DC Voltages...
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Pin assignment of the several SAW filters (depends on region/execution): Table: Pinning SAW filters QSS Video QSS Video QSS Audio Intercarrier (item 1002) (item 1003) (item 1001) (item 1002) Input Input Input Input Switching Input Ground Input Ground Input Ground Input Ground Ground...
Option Settings The option settings for the Tuner type can be found in Option setting 1 of the SAM mode. The Option settings for Option 1 are as follows: Option Byte 1 • Bit 7: OP_PHILIPS_TUNER § Bit 6: OP_FM_RADIO §...
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Options The option settings for the Source Selection can be found in Option settings of the SAM mode. The Option settings for Option 5 are as follows: Option Byte 5 • Bit 7: AV1 § Bit 6: AV2 § Bit 5: AV3 §...
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Table: AV Source Select diversity Pin Symbol Remark 51 R/Pr IN3 50 G/Y IN3 49 B/Pb IN3 AV1 (CVI) 52 INSSW3 74 CVBS2/Y2 95 AUDIO IN5 L 94 AUDIO IN5 R 73 AUDIO IN3 L 72 AUDIO IN3 R AV2 (SVHS) 71 CVBS3/Y3 70 C2/C3 80 AUDIO IN4 L...
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59 V IN (R/Pr IN2/CX) 58 U IN (B/Pb IN2) 57 Y IN (G/Y IN2/CVBS-Yx) Interface 54 U OUT (INSSW2) 76 AUDIO IN2 L 75 AUDIO IN2 R 86 DVBO/IFVO/FMRO N.C. 65 CVBSO/PIP PIP application 56 Y SYNC 100 nF 55 Y OUT 100 nF 53 V OUT (SWO)
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Table: SCART Source Select diversity Pin Symbol Remark 51 R/Pr IN3 50 G/Y IN3 49 B/Pb IN3 52 INSSW3 74 CVBS2/Y2 SCART 1 86 DVBO/IFVO/FMRO 95 AUDIO IN5 L 94 AUDIO IN5 R 93 AUD OUT S L 92 AUD OUT S R 71 CVBS3/Y3 70 C2/C3 81 IFVO/SVO/CVBSI...
Pin Symbol Remark 59 V IN (R/Pr IN2/CX) 58 U IN (B/Pb IN2) 57 Y IN (G/Y IN2/CVBS-Yx) Interface 54 U OUT(INSSW2) 76 AUDIO IN2 L 75 AUDIO IN2 R 65 CVBSO/PIP for PIP 56 YSYNC 100 nF 55 YOUT 100 nF 53 VOUT(SWO) N.C.
SCART2 Output (EU) or Monitor Output (LA/NA/AP) assigned to Headphone • Output . Constant Level Output assigned to Loudspeaker Output . • Video Source Selection Video source selection is done inside the Hercules. Therefore it provides a video switch with 3 external CVBS inputs and a CVBS output. All CVBS inputs can be used as Y- input for Y/C signals.
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Features The features included in the Hercules are as follows: Brightness Control. • Contrast Control. • Saturation Control. • Sharpness Control. • Peak White Limiter. • Beam Current Limiter. • Black Stretch (Contrast Plus). • For sets with the TDA9178, there are two extra features: Luminance Transient Improvement (LTI).
Block Diagram Following diagram is the block diagram of the video processing part: Figure: Video processing block diagram LTI/CTI The TDA9178 is an I2C-bus controlled IC (INCREDIBLE chip) with YUV interface. This IC can do mainly histogram processing, color transient improvement (CTI) and line transient improvement (LTI).
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Color Vector Processing involves skin tone correction, green enhancement and • blue stretch. Spectral Processor involves step improvement processing, contour processing, • smart sharpness control, color dependant sharpness and Color Transient Improvement. Noise detector, feature mode detector and cue flash functions. •...
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Pin Symbol Description U out -(B-Y) signal output pin V ee Ground pin Y out Luminance output pin V cc Supply-voltage pin S out Luminance output for SCAVEM Cue-flash output pin n.c. Not connected pin n.c. Not connected pin Options The option settings allow for process of the video as per set specification.
Option Byte 6 • Bit 7: OP_PERSONAL_ZAPPING, § Bit 6: § Bit 5: OP_FMTRAP § Bit 4: OP_COMBFILTER § Bit 3: OP_ACTIVE_CONTROL § Bit 2: OP_VIDEO_TEXT § Bit 1 :OP_LIGHT_SENSOR, § Bit 0: OP_DUAL_TEXT § For more details on the option settings, please refer to the chapter 8 “Alignments”. Audio Processing The audio decoding is done entirely via the Hercules.
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Diversity The diversity for the Audio decoding can be broken up into two main concepts: The Quasi Split Sound concept used in Europe and some AP sets. • The Inter Carrier concept, used in NAFTA and LATAM. • The UOC-III family makes no difference anymore between QSS- and Intercarrier IF, nearly all types are software-switchable between the two SAW-filter constructions.
Functionality The features available in the Hercules are as follows: Treble and Bass Control. • Surround Sound Effect that includes: • Incredible Stereo. § Incredible Mono. § 3D Sound (not for AV Stereo). § TruSurround (not for AV Stereo). § Virtual Dolby Surround, VDS422 (not for AV Stereo).
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Muting is done via the VOLUME_MUTE line connected to pin 2 of the amplifier-IC and coming from the UOC. The following table shows pin functionality of the Audio Amplifier: Table: Pinning overview TDA2616 Pin Pin Name Normal Operation Input Left Input AC signal Mute 16 V_dc...
Abbreviation list Abbreviation Description 2 Carrier (or Channel) Stereo Automatic Channel Installation: algorithm that installs TV sets directly from cable network by means of a predefined TXT page Analogue to Digital Converter Automatic Frequency Control: control signal used to tune to the correct frequency Automatic Fine Tuning Automatic Gain Control: algorithm that controls the video input of the feature box...
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BTSC Broadcast Television Standard Committee. Multiplex FM stereo sound system, originating from the USA and used e.g. in LATAM and AP-NTSC countries Closed Caption Continuous Cathode Calibration ComPair Computer aided rePair Cathode Ray Tube or picture tube Customer Service Mode Color Transient Improvement: manipulates steepness of chroma transients CVBS...
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Digital Versatile Disc EEPROM Electrically Erasable and Programmable Read Only Memory Extra High Tension EHT-INFO Extra High Tension information Electronic Programming Guide Europe East West, related to horizontal deflection of the set External (source), entering the set via SCART or Cinch Fast Blanking: DC signal accompanying RGB signals FILAMENT Filament of CRT...
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Light Emitting Diode L/L' Monochrome TV system. Sound carrier distance is 6.5 MHz. L' is Band I, L is all bands except for Band I Large Screen or Loudspeaker Monochrome TV system. Sound carrier distance is 4.5 Not Connected NICAM Near Instantaneous Compounded Audio Multiplexing.
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Printed Circuit board Phase Locked Loop. Used for e.g. FST tuning systems. The customer can give directly the desired frequency Power-On Reset Picture Tube Panel (or CRT-panel) Random Access Memory Remote Control handset Red, Green, and Blue video signals Read Only Memory SDAM Service Default / Alignment Mode Second Audio Program...
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SVHS Super Video Home System Software Total Harmonic Distortion Teletext Microprocessor Ultimate One Chip Vertical sync signal V_BAT Main supply voltage for the deflection stage (mostly 141 V) V-chip Violence Chip Video Cassette Recorder WYSIWYR What You See Is What You Record: record selection that follows main picture and sound XTAL Quartz crystal...
IC Data Sheets This section shows the internal block diagrams and pin layouts of ICs that are drawn as 'black boxes' in the electrical diagrams (with the exception of 'memory' and 'logic' ICs). Diagram H, TDA9178 (IC7610) Figure: Internal Block Diagram and Pin Configuration...
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All Models (7661) - Layout Side AV + Headphone Panel (Top Side)
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All Models (7661) - Layout Side AV + Headphone Panel (Bottom Side)
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USED ONLY IN MODELS: 25PT6341/85 (7661) - Side Jack Panel - Wide (Top Side)
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USED ONLY IN MODELS: 25PT6341/85 (7661) - Side Jack Panel - Wide (Bottom Side)
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NOT USED IN MODELS: , 25PT6341/85, 27MS6341/37, 27PT5441/37, 32MS6341/37, 32PT5441/37, 33PT5441/85 (7661) - Layout Top Control Panel (Top Side)
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NOT USED IN MODELS: , 25PT6341/85, 27MS6341/37, 27PT5441/37, 32MS6341/37, 32PT5441/37, 33PT5441/85 (7661) - Layout Top Control Panel (Bottom Side)
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USED ONLY IN MODELS: 27MS6341/37, 32MS6341/37 (7661) - Top Control Panel - Round (Top Side)
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USED ONLY IN MODELS: 27MS6341/37, 32MS6341/37 (7661) - Top Control Panel - Round (Bottom Side)
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USED ONLY IN MODELS: 26PW6341/37, 28PW6341/85, 30PW6341/37, 32PW6341/85 (7661) - Layout Linearity & Panorama Panel (Top Side)
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NOT USED IN MODELS: , 27ST6210/27 (7661) - Layout LTI/CTI Interface Panel (Top Side)
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NOT USED IN MODELS: , 27ST6210/27 (7661) - Layout LTI/CTI Interface Panel (Bottom Side)
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NOT USED IN MODELS: , 25PT6341/85, 27PT5441/37, 32PT5441/37, 33PT5441/85 (7661) - Layout Front Interface Panel (Top Side)
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NOT USED IN MODELS: , 25PT6341/85, 27PT5441/37, 32PT5441/37, 33PT5441/85 (7661) - Layout Front Interface Panel (Bottom Side)
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USED ONLY IN MODELS: 27ST6210/27, (7661) - EPS Module (Top Side)
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USED ONLY IN MODELS: 27ST6210/27, (7661) - SP/LS Module (Top Side)
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USED ONLY IN MODELS: 27ST6210/27, (7661) - SP/LS Module (Bottom Side)
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USED ONLY IN MODELS: 27ST6210/27, (7661) - ITV Interface Module (Top Side)
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USED ONLY IN MODELS: 27ST6210/27, (7661) - ITV Interface Module (Bottom Side)
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All Models (7661) - Testpoint Overview Mono Carrier...
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All Models (7661) - Testpoint Overview CRT...
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All Models (7661) - Testpoint Overview LTI Panel...
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