Philips DPTV400 Series Training Manual Download Page 1

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PHILIPS TECHNICAL TRAINING/QUALITY

ONE PHILIPS DRIVE

PO BOX 14810

KNOXVILLE, TN 37914-1810

PHONE: 865-521-4397

FAX: 865-521-4818

EMAIL: [email protected]

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

Summary of Contents for DPTV400 Series

Page 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 ...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

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

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

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

Page 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 ...

Page 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 ...

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

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

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

Page 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 ...

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

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

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

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

Page 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 ...

Page 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...

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

Page 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...

Page 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...

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

Page 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...

Page 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...

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

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

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

Page 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 ...

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

Page 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...

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

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

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

Page 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...

Page 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...

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

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

Page 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 ...

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

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

Page 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...

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

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

Page 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...

Page 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...

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

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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 ...

Page 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...

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

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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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