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Convergence Horizontal Output (Figure 38)

IC 7044 amplifies the Horizontal convergence waveforms.  The correction waveforms are fed to the
IC on Pins 6, 14, and 15.  They are output to the Convergence Yokes on Pins 9, 11, and 18.  The IC
is powered by four supply inputs.  A +35-volt supply is fed to Pin 5, a -35-volt supply is fed to Pin 4,
and a -22-volt supply is fed to Pin 8, 12, and 17.  The supply fed to Pin 10 is normally a +22-volt
supply.  During signal peak drives, the voltage on Pin 10 is increased to +35 volts.  Feedback sense
voltage is developed across the 6.8 ohm resistors on the return side of each yoke. Transistor 7007
is part of a Soft Start circuit.  When the set is turned On, Transistor 7007 turns On until capacitor
2043 is fully charged.  While 7007 is being turned On, a negative voltage is placed on Pin 3 muting
the output of the IC. A 100-ohm snubber resistor is across each of the yoke windings.  This resistor
will overheat if the unit is operated with the Convergence Yokes unplugged.

Convergence Vertical Output (Figure 39)

IC 7045 amplifies the Vertical convergence waveforms.  The correction waveforms are fed to the IC on
Pins 6, 14, and 15.  Output is on Pins 9, 11, and 18 to the Vertical Convergence yokes.  Feedback
sense voltage is developed across the 6.8-ohm resistors on the return side of each yoke.  A Snubber
resistor is across each yoke.  These resistors will overheat if the circuit is operated without the
Convergence Yokes being plugged in.  The IC is powered by four supplies: a +35 volt, -35 volt,
VccPSW-V, and VCCNSW-V.  The VccPSW-V supply is normally at +22 volts.  The BV_OUT,
GV_OUT, and RV_OUT lines are connected to a Vertical Power up circuit which senses the drive to
the Convergence Yokes.  If the drive to the yokes reaches 10 to 12 volts, the Vertical Power up circuit
will switch the VccPSW-V supply to +35 volts.  If the Vertical Power up circuit senses a negative 10 to
12 volt drive to the Vertical Convergence yokes, the VccNSW-V supply will switch from -22 volts to -35
volts.  As with the Horizontal drive circuit, 7005 mutes the output of 7045 during power up.

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Содержание DPTV400 Series

Страница 1: ...PS DRIVE PO BOX 14810 KNOXVILLE TN 37914 1810 PHONE 865 521 4397 FAX 865 521 4818 EMAIL TECHNICAL TRAINING PHILIPS COM P H I L I P S TECH FORCE TRAIN M A N U A L S TRAINING PHILIPS PHILIPS SERVICE AND QUALITY DPTV400 SERIES HD PTV TRAINING MANUAL ...

Страница 2: ...ack Panel 21 NTSC AV inputs and switching 21 NTSC SSB Processing 25 ATSC block diagram HD Version 25 ATSC Block diagram Epic version 25 HD DW module signal flow 30 YUV to Y Pb Pr Converter 31 AV3 and AV4 Inputs and Switching 33 Scaler Block 34 SSM video drive 36 Sharpness Control 37 Tint Control 37 CRT drive 37 HOP IO 41 CRT panel 41 Audio Signal flow 43 SSB Sound processor 43 Audio Amplifier 43 S...

Страница 3: ...rvice Alignment Mode SAM 62 Manual Alignment of the HD_DW module 63 Equipment required 64 Offset Adjustments 64 Gain Adjustments 64 Gray Scale Alignment 65 Error Codes 66 Convergence Mode 69 Touch Up Convergence 70 Green Geometry 70 Glossary of Terms 72 ...

Страница 4: ...0 17 DPTV415 55PP9920 17 DPTV415 60PP9920 17 DPTV415 It also has NTSC composite and SVHS inputs on AV1 and AV2 AV3 and AV4 can accept Component signals for either 1Fh NTSC 2Fh 480p 720p or 1080i AV3 can be either Component signal or RGB with separate Horizontal and Vertical sync AV5 is a HDMI digital video input Regardless of the input the signal to be displayed is converted to 1080i Analog Left a...

Страница 5: ... The INTELLITUNE selection under Features will auto program the channels to add any new chan nels that may be detected while the set is turned Off This feature can be switched On or Off by the Customer It will not delete any existing channels The Channel Edit selection under Install is used to manually install the NTSC channels that are not detected by the AUTOPROGRAM The WEAK DIG SIG selection is...

Страница 6: ...lays the picture in 4 x3 with black bars on each side The bars slowly shift to prevent CRT burn in Panoramic format The Panoramic format keeps the picture center linear while stretching the outside edges of the picture This allows a 4 x 3 picture to be dis played on a 16 x 9 screen with minimum linear distortion Zoom Format The Zoom format expands the picture vertically and Horizontally This mode ...

Страница 7: ...g nal level is indicated If the bar is all red there is not enough signal detected to properly display the channel When the red bar ends a yellow bar will show This indicates that enough signal is present to display the channel but that it is weak If a strong signal is present a green bar will appear to the right of the red yellow bar This indicates that there is enough signal present to display t...

Страница 8: ...able is connected to the Antenna input the set will not receive the QAM HD signals transmitted over the cable The 8 VSB signal is an amplitude modulated signal with eight levels representating data bit values The QAM Quadrature Amplitude Modulation signal combines both amplitude and phase modulation During Autoprograming the set will scan both inputs for signals Figure 3 shows the Jack Panel for t...

Страница 9: ...7 FIGURE 3 EPIC REAR JACK PANEL Page 6 ...

Страница 10: ...SSB ATSC POWER INTERFACE PANEL SSM HD DW LSB AC INPUT FOCUS BLOCK FG2 CRT PANEL BOARD LOCATIONS Page 7 ...

Страница 11: ...n the SSB Small Signal Board via the SSM Small Signal Module When the set is turned On the Processor on the SSB switches the Standby line Low The 15 5 2 and 9 volt supplies to the SSM are switched On The 5 2 volt 3 5 volt 15 volt and 4 5 volt supplies to the Power Interface board are also switches On The Processor on the SSB also switches the Power Interface supplies On via the Power On Off contro...

Страница 12: ... internal FET drives transformer 5202 until the charge on capacitor 2283 reaches 4 8 volts The IC repeats the cycle until the 5 volt Standby voltage reaches the cor rect level Shunt regulator 7212 then turns On turning opto isolator 7213 On The operating volt age for 7218 is then supplied by the rectified Hot secondary voltage from Pin 1 of 5202 The inter nal regulator keeps Pin 1 at 5 8 volts Reg...

Страница 13: ...pacitor 2303 drop below 9 4 volts The Under Voltage Lockout of 7302 will then turn the output on Pin 3 Off until 2303 again charges to 14 5 volts After several startup cycles the operating voltage for 7302 is supplied by Pin 10 of 5300 Regulation is accomplished by monitoring the 130VS supply via resistors 3324 3350 3323 and 3322 The Feedback voltage is applied to the Shunt Regulator 7304 which dr...

Страница 14: ...FIGURE 6 STANDBY POWER SUPPLY Page 11 ...

Страница 15: ...FIGURE 7 MAIN POWER SUPPLY Page 12 ...

Страница 16: ...e voltage to the input of 7305 remains above 2 5 volts it is turned On This keeps the Power Fail and Protect lines Low If Power is removed from the set the voltage to the input of 7305 will discharge quickly because of the low capacitance on the input Shunt Regulator 7305 will then turn Off The 130VS supply will then be applied to the Power Fail and Protect lines via resistor 3359 The Power Fail l...

Страница 17: ...7206 7204 and 7205 On This turns the Regulators 7101 7102 7103 7105 and 7104 Off When the set is turned On the On Off line goes Low switching 7202 Off which turns 7206 7204 and 7205 Off This turns Regulators 7101 7102 7103 7105 and 7104 On The output of 7101 turns transistors 7203 On to switch the 5 2 volt supply to the ATSC module A 12 volt 5 2 volt two 1 2 volt 2 5 volt and 3 3 volt supplies are...

Страница 18: ... volt supply via resistor 3204 This switches the 12VDC POD On The 12VDC POD switches transistor 7213 On developing the 5V POD supply The 5V POD supply then turns IC 7105 On switching the 3 3V POD supply On The 3 3V POD supply switches ICs 7107 7103 and 7102 On This switches the 2 5VDC POD 1 2VDC CH2 POD and 1 2VDC CH1 supplies On The 1 2VDC CH1 supply is fine tuned by feedback from the ATSC module...

Страница 19: ...the High Voltage module A supply voltage of 130 volts is also fed to Pin 10 of the module The Module then outputs High voltage to the three CRTs It also outputs Focus voltage to the Focus G2 block Output on Pin 4 is rectified by 6917 to produce a negative 200 volt source for the CRT G1 voltage The voltage is also rectified by 6919 to produce a 330 volt source for the Dynamic Focus drive The Dag li...

Страница 20: ...FIGURE 11 HORIZONTAL OUTPUT Page 17 ...

Страница 21: ...FIGURE 12 HIGH VOLTAGE Page 18 ...

Страница 22: ...FIGURE 13 VERTICAL AMPLIFIER Page 19 ...

Страница 23: ...s normally Low keeping 7809 turned Off The 200 volt source is fed through zener diodes 6812 and 6816 resistor 3850 the base emitter of 7906 the base emitter of 7812 to keep transistor 7813 turned On This turns transistor 7814 On which switches the On voltage to the High Voltage module The conduction of 7812 keeps the volt age on the G1 line at approximately 18 volts which turns the CRTs On If the ...

Страница 24: ... the HOP is fed to the LSB Large Signal Board to drive the Scan circuits Side Jack Panel Figure 16 The Side Jack panel has a Composite Video and SVHS input When there is a connector in the SVHS input the Composite input is muted Resistors 3001 3002 and 3000 on the Video Y and C lines pro vide 75 ohm impedance matching If a cable is plugged into the SVHS connector the line connecting resistor 3029 ...

Страница 25: ...FIGURE 15 VIDEO SIGNAL FLOW BLOCK Page 22 ...

Страница 26: ...FIGURE 16 SIDE JACK PANEL Page 23 ...

Страница 27: ...FIGURE 17 SSM NTSC AV INPUTS AND SWITCHING Page 24 ...

Страница 28: ...oder If the signal is ATSC the 8 bit compressed data stream is detected and sent to the Digital Decoder The Digital Decoder decom presses the MPEG 2 ATSC signal The signal is then fed to a TMDS transmitter before being sent to the HD DW module The Digital Decoder outputs a digital audio signal when an ATSC channel is selected This signal is output on a Coax Digital audio output ATSC Block diagram ...

Страница 29: ...FIGURE 18 NTSC SSB SIGNAL PROCESSING Page 26 ...

Страница 30: ...FIGURE 19 HD ATSC BLOCK Page 27 ...

Страница 31: ...FIGURE 20 EPIC ATSC BLOCK Page 28 ...

Страница 32: ...FIGURE 21 HD DW MODULE Page 29 ...

Страница 33: ... IC 7601 TMDS Picture data from the ATSC module is fed to 7500 TMDS Receiver where it is decoded back to three 8 bit data lines This output is also fed to the Scaler IC The Scaler IC enhances the picture and resizes it to a 1080i It also performs the PIP function Any of the AV inputs or the HDMI input can be the main picture while the ATSC output can be in the PIP window or the ATSC can be in the ...

Страница 34: ...st be phase inverted The Y or Luminance signal is buffered by transistor 7207 The Y_IN labeled signal from the SSB is matched to a lower impedance by 7207 The output is labeled as Y_YUV The V_IN or Red signal is inverted by Transistor 7203 and buffered by Transistor 7202 The output is labeled as PR_YUV The U_IN or Blue signal is inverted by Transistor 7205 and buffered by Transistor 7204 The outpu...

Страница 35: ...FIGURE 23 AV3 AND AV4 INPUTS AND SWITCHING Page 32 ...

Страница 36: ...efore feeding it to the A D converter The signal sampling Offset and Drive levels are set in the SAM menu which are explained in the adjustment section The output of the A D converters is fed to the Scaler on three eight bit data lines These Data lines are shared with those from the HDMI receiver When the HDMI receiver is switched On the data lines are switched Off becoming open circuits If the Sy...

Страница 37: ...y of the Horizontal and Vertical Sync is used for signal processing timing and Format detection The selected picture data is fed to the Format circuits to resize the picture The CSC Color Space Conversion circuit changes the data to a YCbCr format if the input signal is in the RGB format The Image Processor enhances and Formats the picture IC 7600 stores the picture data as it is being processed b...

Страница 38: ...FIGURE 25 SSM VIDEO DRIVE Page 35 ...

Страница 39: ...ode Calibration circuit The Cathode Calibration circuit adjusts the cutoff levels of the CRTs to maintain the correct gray scale tracking When the set is first turned On a calibration pulse is output on the RGB lines The Cathode Calibration circuit monitors this pulse on the AKB line to set the Black level and the maximum drive voltage for the cathode Once the Calibration has taken place the Outpu...

Страница 40: ...e U signal while 7520 amplifies the V signal The Tint control voltage changes the balance between the U Pb and V Pr signals to change causing the tint of the picture to change CRT drive Figure 28 The output of 7600 is fed to the RGB amplifiers before being fed to the CRTs Transistors 7720 and 7721 buffer the Blue output on Pin 42 The B BIAS control voltage controls the gain of this circuit Transis...

Страница 41: ...FIGURE 26 SHARPNESS CONTROL Page 38 ...

Страница 42: ...FIGURE 27 TINT CONTROL Page 39 ...

Страница 43: ...FIGURE 28 CRT DRIVE Page 40 ...

Страница 44: ...d fed to the HOP panel The CRT circuit is powered by the 200 volt supply from the LSB If there is a problem in this cir cuit the one resistor 3217 will open If this resistor opens the CRT will have excessive drive caus ing it to go to maximum brightness This will cause an over current shutdown on the LSB In nor mal operation the G1 voltage will measure approximately minus 20 volts During blanking ...

Страница 45: ...FIGURE 30 CRT PANEL Page 42 ...

Страница 46: ...A converters The Main Speaker Audio is output on Pins 20 and 21 AV out Audio is output on Pins 25 and 26 Audio Amplifier Figure 33 The Audio Amplifier is located On the SSM The output power for the Audio Amplifier is 10 watts per channel for the Basic and Basic Plus versions The Core Version has an output of 15 watts per channel IC 7700 is the Audio output IC This is a class D amplifier Left and R...

Страница 47: ...FIGURE 31 AUDIO SIGNAL FLOW BLOCK Page 44 ...

Страница 48: ...FIGURE 32 SSB AUDIO PROCESSING Page 45 ...

Страница 49: ...FIGURE 33 AUDIO AMPLIFIER Page 46 ...

Страница 50: ...gative 7705 will turn On This turns 7706 On which turns 7707 On This causes the Front Detect line to go Low preventing the Microprocessor from receiving any commands It also turns SCR 6701 On turning transistor 7708 On causing the Standby line to go High If this SCR is turned On it will be necessary to remove power from the set to reset the circuit This will turn the set Off Transistor 7707 also t...

Страница 51: ...ch of the three colors The locations of these sensors are recorded by the ACS Microprocessor When the Customer selects the Intellisense feature the sensors are again scanned and the rotation of the beams for each color is adjusted to the recorded values Intellisense Sensing Circuit Figure 37 The output of the four sensing Solar Cells is fed to IC 7141 located on the ACS module Inputs TBU0 TBU1 and...

Страница 52: ...FIGURE 35 CONVERGENCE PROCESSOR Page 49 ...

Страница 53: ...FIGURE 37 INTELLISENSE SENSING CIRCUIT Page 50 ...

Страница 54: ...t is operated with the Convergence Yokes unplugged Convergence Vertical Output Figure 39 IC 7045 amplifies the Vertical convergence waveforms The correction waveforms are fed to the IC on Pins 6 14 and 15 Output is on Pins 9 11 and 18 to the Vertical Convergence yokes Feedback sense voltage is developed across the 6 8 ohm resistors on the return side of each yoke A Snubber resistor is across each ...

Страница 55: ...FIGURE 38 CONVERGENCE HORIZONTAL DRIVE Page 52 ...

Страница 56: ...FIGURE 39 VERTICAL CONVERGENCE DRIVE Page 53 ...

Страница 57: ... SDA B line The NVM on the SSM stores White Tone information Geometry settings and Convergence data The Standby and DAM_CTL lines control power switch ing in the set The Standby switches the Main and Standby supplies The DAM_CTL line switches power to the ATSC module OSD Signal Path Figure 41 On Screen Displays are generated by the Painter ATSC Processor GDE Processor and Convergence Processor Whe...

Страница 58: ...FIGURE 40 SET CONTROL AND I2C BUSSES Page 55 ...

Страница 59: ...FIGURE 41 OSD SIGNAL PATH Page 56 ...

Страница 60: ...AIL line on Pin 10 of 1518 Set the oscilloscope to DC and monitor this Pin while turning the set On If this line goes High and the Standby line goes High there is a problem with the Power Fail detection circuit on the LSB The LSB should be repaired or replaced In conclusion if the RAWDC and STARTUP are present on Pin 15 the Standby line on Pin 6 of 1518 goes Low and stays Low and the 130 volt shou...

Страница 61: ...TSC module on Pins 7 and 8 of 1751 on the SSM Tuner audio is processed on the ATSC module The audio processor on the ATSC module selects between the AV audio from the SSM or the Tuner audio on the ATSC module Selected audio is then fed to the SSM on Pins 3 and 4 of 1751 The audio is then fed to the SSB via the SSM for additional processing The input to the SSB can be checked on Pins 53 and 58 of c...

Страница 62: ...Figure 59 FIGURE 42 WIRING INTERCONNECT ...

Страница 63: ...VIEW Y from HD DW module measured on Pin 1 of 1411 Pb from HD DW module measured on Pin 3 of 1411 Pr from HD DW module measured on Pin 5 of 1411 WAVEFORMS MEASURED USING A SENCORE VP300 CONNECTED TO AV4 CONNECTOR LOCATIONS REAR VIEW ...

Страница 64: ...rs of the set in hexadeci mal It also shows the software ver sion of the Processor Painter located on the SSB Line two shows the software version and NVM ID for the HD DW module Line three shows the software version of the GDE processor located on the SSM Line four shows the Error codes Line five shows the Option codes for the set Line six shows the Tuning System selected by the set Lines seven th...

Страница 65: ...ill appear as follows when SDM is entered SDM After pressing the Info Exit or Status button on the Remote the follow screen will appear SDM HRS 0092 SWID IHDTV2K4 2US1 7 00 ERR 0 0 0 0 0 0 0 The following occurs in the SDM Unfriendly service modes are disabled Start blinking LED for error reading if needed Channel 3 is tuned Sets Video and Audio values are set to 50 and volume set to 25 Software p...

Страница 66: ...in the SAM mode The HD DW ALIGN mode is used to set the A D converter s sampling level There are two settings which are Y Pb Pr and RGB The ADC ALIGN selection will automatically set these levels The correct signal must be applied to the set for this adjustment to correctly adjust the levels The two signal are shown below The top signal must be in the 480p RGB mode The bottom signal must be in the...

Страница 67: ... black level equals blanking Connect channel two of the Oscilloscope to Pin 3 of connector 1411 Adjust the Y Pb Pr B Offset until the black level equals blanking Connect channel two of the Oscilloscope to Pin 5 of connector 1411 Adjust the Y Pb Pr R Offset until the black level equals blanking Gain Adjustments Connect channel two of the Oscilloscope to Pin 3 of connector 1411 Adjust the Y Pb Pr G ...

Страница 68: ...ce Apply a cross hatch pattern to the set and pro ceed with the Geometry adjustment If the set is equipped with the Intellisense auto convergence system a Convergence alignment must be performed after making any changes to the Geometry If the Convergence alignment is not performed the set will be out of convergence when the Customer selects the Auto Convergence feature 1 Enter the SAM mode as prev...

Страница 69: ...hows a list of Error codes which may occur Error Number Description 0 No error 2 GDE Horizontal Output failure 3 3 GDE Critical Error 3 4 PEMG 5V protection active detected at MSP34XXX 5 GDE HOP POR Initialization failure 3 6 General I2C error main I2C bus 7 GDE critical error DAC Initialization failure 3 9 HCS GDE communication failure There was no Initialization Complete 10 PEMG NVM IC STM24xxx ...

Страница 70: ...C error 2 44 HDM DVI Chip error I2C 2 45 HDM Bad Checksum error 2 46 HDM Bad Format error 2 51 GDE Auto Convergence Failure error 3 52 GDE Set References Failure error 3 53 GDE Sensor Pattern error 3 54 GDE General Initialization error 3 55 GDE HOP error I2C 3 56 GDE DAC error I2C 3 57 GDE ST2050A error I2C 3 58 GDE Main NVM error I2C 3 59 GDE Convergence Data Integrity error 3 61 PEMG Unrecoverab...

Страница 71: ...FIGURE 44 SAM MENUS Page 68 ...

Страница 72: ...changed a complete Geometry and Convergence alignment will be necessary To obtain the correct Geometry for a complete Convergence a template must be used There is only one Geometry and Convergence setting stored in the EEPROM on the SSM for the DPTV400 series Whatever signal is applied to the set the picture is displayed in a 1080i format 55 inch 16x9 aspect ratio Use Template ST4181 60 inch 16x9 ...

Страница 73: ...location When in the adjustment mode press the Menu button a second time if it is desired to change the step size of the adjustment When making minor Convergence corrections you may adjust the following RED TO GREEN BLUE TO GREEN SP RED MP RED SP BLUE MP BLUE Do not make changes to the Green Geometry without placing a Template over the screen Green Geometry Figure 46 shows the internally generated...

Страница 74: ...Green in the selection menu Using the same method that was used to adjust the Green Grid to the Template adjust the Red Grid onto the Green Grid If the set is a later produc tion select SP RED to center the Red grid onto the Green grid Exit this mode by pressing the Menu button Then select the MP RED to adjust the Red onto the Green using the 35 point adjust ment When this is complete select the R...

Страница 75: ...ly equivalent to that of NTSC This equivalent quality may be achieved from pictures sourced at the 4 2 2 level of ITU R Recommendation 601 and subjected to processing as part of the bit rate compression The results should be such that when judged across a represen tative sample of program material subjective equivalence with NTSC is achieved Also called standard digital television Horizontal frequ...

Страница 76: ...b Blue and Pr Red signal All three components are necessary to create a complete color picture Y Cb Cr Digital Component video used to create the Y Pb Pr signals when fed to an D A converter D A Digital to Analog converter A D Analog to Digital converter DAM Digital Access Mode QAM Quadrature Amplitude Modulation Combined amplitude and phase modulation to transmit digital data Page 73 ...

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