Philips PTV500 series, Service Manual

Page 1: ...Philips Consumer Electronics Company A Division of North American Philips Corporation In Home Service Guide Projection Television PTV500 Series ...

Page 2: ...tments Ground Connections For Test Equipment 12 Unless Otherwise Specified 12 On Screen Menu Positioning 12 RF AGC Delay 12 VCO AFT Adjustment 13 Sound Alignment 14 Sub Contrast Alignment 14 Comb Filter Alignment 14 Sub Brightness Adjustment 14 Dynamic Gamma 15 High Voltage Frequency Adjustment 15 Video Level Alignment 15 Vertical Height Adjustment 16 Vertical Blanker Adjustment 16 130Vdc Adjust 1...

Page 3: ...igure 7 Figure 8 Figure 9 Simplified Drawings Figure 1 PTV510 Frontview 29 PTV510 Rearview 30 PTV520 Frontview 31 PTV520 Rearview 32 PTV535 Frontview 33 PTV535 Rearview 34 PTV500 72 Degree Light Path 35 PTV500 Block Diagram 36 PTV500 Power Supply Module Block Diagram 37 Figure 10 PTVS00 Power Supply Connections 38 Figure 11 PTV500 Shutdown Circuitry 39 Figure 12 PTV500 Signal Deflection Module Lay...

Page 4: ... On 5 Be careful that the correct Ground Reference is used when making measurements 6 Be certain that all grounds ground straps and wires are properly connected to protect the set and user from shock 7 Always check for shock hazards after completion of chassis repairs Refer to Service Manual 7524 for proper Safety Check procedures 8 The 160Vdc Source is present and the Standby Power Supply is runn...

Page 5: ...l Remote Menu Driven Tuning System The Tuning System is mounted on the Signal Deflection High Voltage Module The Microcomputer for the Tuning System communicates via an 12C Bus with the DAC IC RF Switcher optional U V Tuner AVIO Jack Panel MDPIP Module Closed Caption Decoder Module and Convergence Panel Dedicated Serial Data and Serial Clock lines SDA1 AND SCL1 communicate with the Clock Calendar ...

Page 6: ... to the Color MDPIP Module to be used as the PIP Picture ReModulated Video RMV is sent from the Color MDPIP Module to the S VHS Switch IC IC670 External Video input from an External Video source can be applied through the Jack Panel to the Color MDPIP Module Control of the Color MDPIP Module is via the 12C Bus The S VHS Switch IC selects either the tuner signal or the Super VHS signals from the Ja...

Page 7: ...ese circuits Each circuit has its own transformer and Power MOS FET regulator Both regulator circuits are controlled by one Controller IC IC401 One of the circuits is used for Standby operation with both circuits being used for Full Power operation As soon as the TV Set is plugged into an AC Receptacle the Standby Power Supply starts running from the voltage applied through R415 to IC401 16 As the...

Page 8: ...oltages from the Power Supply can be checked at the jacks of either the P Board or the A Board Also shown in Figure 10 are the Scan Derived voltages Shutdown Circuitry The High Voltage circuitry even though it is located on the main chassis PCB is separate from the Horizontal circuitry Figure 11 The High Voltage is phase locked to the Horizontal signal via the Horiz Pulse as input through Q900 Thi...

Page 9: ...ll blank the Picture Tubes and turn On Q904 placing the set in shutdown The Shutdown Control IC tC902 watches for too much High Voltage and or too much Beam Current If IC902 is turned On from either of these conditions it must be reset by turning the set Off and On again Beam Current is monitored from the bot tom of the diode stack and applied to Q907 Q908 The output from Q907 Q908 is applied to t...

Page 10: ...er side without remov ing it from the set Diagnostic LEDs of the Power Supply The Power Supply Module is equipped with two LEDs that are visible when the cabinet back is removed These LEDs are a quick check for several possible problems or conditions Under normal operating On conditions both LEDs should be lit If not these are the other possible conditions and what they indicate D429 located on th...

Page 11: ...housandth of a second with no deflection It is important NOT to defeat the deflection failsafe and CRT phos phor protection circuits as shown in Figure 11 If horizontal or vertical deflection circuits are not operating properly blanking of the video will occur from the collector of Q500 Keep in mind a failure of the protection circuits can also cause blanking of the video or shutdown of high volta...

Page 12: ...e video could be going to the AVIO Jack Panel but not returning to the main chassis Notice J620 in the Cable Connections drawing of Figure 13 If the set does not have a Color MDPIP Module the next place to check is J600 Pins 5 3 and 1 This is the Red Green and Blue output signals to the CRTs If these signals are missing the Signal Deflection High Voltage Module should be replaced or repaired If th...

Page 13: ... adjustments are HOT with respect to voltage For maximum safety use only properly insulated tools 2 Refer to the Signal Deflection Module Layout Diagram Figure 12 for the location of test points or service adjustable controls On Screen Menu Positioning Some Signal Deflection Modules may have C341 screened on the board In the past this trimmer capacitor was used for posi tioning of the On Screen Cu...

Page 14: ...t and remove both shorts from Test Points TP16A B and TP23 7 Adjust the VCO Coil L204 to obtain the same dc voltage reading at Test Point 7 that was recorded in step 5 8 Connect the Coincidence line at the collector of Q203 jumper B37 near the J TEST Connector to 5Vdc Pin 3 of IC401 or the Anode of D401 9 Apply a local broadcast signal air signal to the antenna ter minals and turn the set On 10 Se...

Page 15: ...lloscope is 1Vp p 10mV Comb Filter Alignment this adjustment requires the use of equipment not normally carried into the home Note The following procedure covers the only Field Adjustable Controls contained within the CCD Comb Filter Module These are also the only controls accessible through holes provided in the top shield of the Module 1 Apply a Color Bar signal from a Color Bar Generator to the...

Page 16: ...wer supplied to the chas sis 2 Undo cable restraints and fold the chassis down in order to gain access to the copper side of the module 3 Locate the copper pad for TP67 and solder a short piece of wire onto it 4 Connect a jumper lead to this test point and connect the other end to ground 5 Connect a Frequency Counter to Test Point TP38 6 Turn On the set and adjust R902 to obtain a reading of 15 73...

Page 17: ...is additional information does appear on screen it usually shows up as a bright white line at the very top of the screen The Vertical Blanker Control R802 eliminates this type of distortion by adjusting the vertical blanking time to eliminate this white line from the top of the screen In order to properly adjust this con trol you must first tune to the channel exhibiting this type of dis tortion o...

Page 18: ... Audio Frequency Generator for 97 55kHz at 250mV RMS 3 Connect an AC Millivolt Meter to Test Point 54 Pin 42 of IC120 and adjust R123 for a minimum null reading on the meter Note This null voltage is less than 35mV RMS typically about 20mV RMS Pilot VCO Adjustment 1 Apply a 4 5MHz sinewave at 20mV 5mV RMS to Test Point 15 When pilot input is required apply 15 734Hz 5kHz deviation 4 5MHz carrier to...

Page 19: ...etting at mid range 4 Color setting at minimum 5 lqnt setting at mid range Electrical Focus 1 With the set tuned to a crosshatch pattern this adjustment can be made from the back of the set with the light shield removed The pattern will appear clearer if the front of the screen is covered with a dark cloth 2 Observe the magnified reflections of the individual picture tubes on the back side of the ...

Page 20: ...o the cathode of the Green CRT Pin 8 of the CRT Socket or either end of R210 8 Adjust the Sub Brightness Control R776 to obtain a read ing of 195Vdc on the meter 9 Remove the DC voltmeter from the Green cathode 10 Looking directly into the Tube Lens bring up each of the G2 Screen Controls bottom row on the Focus G2 Distribution Module for just barely visible light in each tube 11 Proceed to the Gr...

Page 21: ...after replacing a Signal Deflection Module in the PTV500 Systems The following procedure assumes a Gray Scale problem exists and G2 Screen Controls require no further modifications Setup Procedure 1 Install the new Signal Deflection Module 2 Turn the set On and tune to a good air or cable channel 3 Picture Sharpness Brightness and Tint set to mid range Color set to minimum 4 Set the Lo Lite Contro...

Page 22: ...g Adjustments Notes 1 The set should be warmed up for at least 20 minutes before making screen setup adjustments 2 The raster of the GREEN CRT must be centered and adjust ed for a screen display that is as distortion free and geomet rically correct as possible before going on to the convergence procedure 3 After the green screen is adjusted for correct geometry and centering its controls will not ...

Page 23: ...amp 5 Remove ONLY the lower Setup Pin jumper enabling the Convergence Panel controls Do not remove the other jumpers at this time keep Customer Controls disabled 6 Select the crosshatch pattern 7 Adjust the Vertical Size R551 on the Signal Deflection Module for approximately 3 4 overscan at the top and bot tom of the screen viewed from the back side of the screen 8 Adjust the Horizontal Size R469 ...

Page 24: ...ergence Red Screen Convergence Procedure 1 Uncover the Red Output Lens and re cover the Blue CRT Output Lens 2 Re connect the Setup Terminal Jumper to disable the Convergence Panel Adjustments 3 Loosen the Yoke clamp on the Red CRT 4 By rotating the Yoke visually adjust the Red Horizontal Skew at the center portion of the screen the upper and lower portions may not be properly aligned 5 Re tighten...

Page 25: ...n the Remote Transmitter activates these default values and causes them to be read from memory These registers control the customer adjustments PIP setups graphics intensity and clock calibration Test Mode Entry and Exit Using the Remote Transmitter enter the following button sequence to activate Test Mode C 1 Digit 0 2 Digit 6 3 Digit 2 4 Digit 5 5 Digit 9 6 Digit 6 7 Menu If the chassis is in Te...

Page 26: ...register values from their default values to new values this includes all factory preset conditions When entering this Test Mode the Tuning System will attempt to retrieve the current Test Mode register values that are stored in the EEPROM IC304 If the EEPROM has never been pro grammed default data values will be stored as shown listed in the register table Depression of the keyboard PWR button wh...

Page 27: ...P Write Start Position SGS Clock Calibration Closed Caption HorizontalPosition PIP Color Delay PIP Vertical Position PIP Horizontal Position PIP Background Burst Level System Information Diagnostics While in Test Mode C depressing the STATUS button will replace the bottom line of channel mode register data with a list of letters identifying those subsystems which could be present but DID NOT respo...

Page 28: ...r 1 M Pro Logic Controller 2 N Sound Processor O JD 13 Sensing IC E JD 15 Sensing IC Q Remote Locator R Closed Caption Decoder Pro Logic Board Pro Logic Board Pro Logic Board Pro Logic Board Jack Panel Jack Panel Not Used On Sig Def HV Module 27 ...

Page 29: ...28 ...

Page 30: ...awings SCREEN ASSEMBLY II F_ CUSTOMER KEYBOARD 0 SPEAKER CONVERGENCE PANEL A10524AO01 4835 219 77454 CRT s _PT122A001 4835 219 77468 APTt21AO01 855 219 77466 4855 219 77467 1I G SPEAKER CRT BOARDS FIGURE 1 PTV510 FRONTVIEW 29 ...

Page 31: ...MP AMP017B003 4835 219 77456 L PANEL SIONAL OEFL CTION HIGH VOLTAGE MODULE MF5DIOOD4 4835 219 D7125 j POWER SUPPLY APWO42BOO2 4B35 219 7747D __l FOCUS G2 DIDTR_UTION BLOCK 220493 5 4835 101 97018 30 FIGURE 2 PTV510 REARVIEW ...

Page 32: ...OMER KEYBOARD 0 SPEAKER CONVERGENCE PANEL AIO524BO02 4835 219 77473 CRT s APT12DA00t APT122AOD1 4855 219 77468 APT121AO01 4835 219 77466 Z_ZZZ _ 4835 219 77467_ _I_Z_Z __J _ _ _ I r _CRT BOARDS FIGURE 3 PTV520 FRONTVIEW 31 ...

Page 33: ...L OEFL CTION H GH VOLTAGE UODUL EMFSO2D004 4835 219 g7126 PZP MODULE APP012 ADDI f 4835 219 57418 II I Lz 7 J AV_O JACK PANEL I AVJIOD DOO4 I 4635 219 77472 I r e o O POWER SUPPLY MOOUL APWO42BOO2 4835 219 77475 FOCUS G2 DISTR _UTION BLOCK 220493 5 4835 101 97018 32 FIGURE 4 PTV520 REARVIEW ...

Page 34: ...RGENCE PANEL AIOB19AOOl 4835 219 77452 SCREEN ASSEMBLY CUSTOMER KEYBOARD ID _ I CRT s i_pT124_A001 4835 219 7748g r_ APT125 AO01 _835 219 77491 4835 219 77492 Ill _CRT BOARDS r_ l 0 11 tWEETER SPEAKER FIGURE 5 PTV535 FRONTVIEW 33 ...

Page 35: ...E PRO LOGIC COLOR MDPIP MODULE MODULE A10467 A001 APPO12 A001 4835 219 77383 48_5 219 57418 o s B o IO F BLOCK 220493 5 4_35 219 77478 POWER 2X12 5W AMF SUPPLY AMPOt9 AO01 _219 77375 OWER SUPPLY FOR IOOW AUDIO AMP APW036 CO03 835 21S 77457 FIGURE 6 PTV535 REARVIEW 34 ...

Page 36: ...FRONT SCREEN I MIRROR Z THIN LINE CABINET FIGURE 7 PTV 72 DEGREE LIGHT PATH 35 ...

Page 37: ...TBY 1 RF SW TCHER OPTIONAL V AUDIO AUDIO V 0 O I I xr IVZO I oo I_ IF SIGNAL PROCESSO R I EXT i_ AVI 0 I AUO JACK PANEL _f HORIZ SCL N VERT 1C600 NTSC SIGNAL PROCESSOR DEFLECTION YOKES PULSE OWNI 1C550 VERTICAL VERT DEFLECTION OUT w_wwww_wwww_w_ J 36 FIGURE 8 PTV500 BLOCK DIAGRAM ...

Page 38: ...R TRANSFORMER L Ill t30V 15V 9V 26V R416 15 ON OFF FOR 12 5W AMP 4 12 5V RUN SOURCE _1_ T402 VCC STANDBY I 8 7 16 I R 415 TRANSFORMERI v I 56K I 1IC4O8 2 6v_0 _1 _ _i T I 5v REG _START m Q402 I TA OI L IREGULATORIO I L_I 3 5v _ o sZ R469 vl 13 5V 8 12V 9 15V STBY 7 3 5V 3 1C 02 1 CONTROL 16 12 130V ADJUST 4V UNDERVOLTAGE 3V OVERVOLTAGE RESET POWER ON OFF __1 FIGURE 9 PTV500 POWER SUPPLY BLOCK DIAG...

Page 39: ...5V GND 15V A STBY W OFF RESET 1 404 P4O 15v B 15V B STBY 130V GND 130V GND 130V B 130V 8 130V C GROUND FROM ANTENNA i INPUT P467 J402 J467 t YELLOW PLUG TO TO AUDIO POWER AMP AMP SMPS Q k_ J462 J461 NEU I yHOT SOLDERED J405 WHITE PLUG J404 5t RED PLUG J408 P BOARD POWER SUPPLY I_I_220VAC J469 1_2_3_4_ P46_R ON HOT GND _TO KEY 12 5W II ii vl C FIGURE 10 PTV500 POWER SUPPLY CONNECTIONS ...

Page 40: ...VERT PULSE T LOW VOLTAGE DETECTION TP38 HIGH VOLTAGE FREQUENCY CHECK isv Isv Qgo1 ROI SHUTDOWN IK T900 15ewe HV OUTPUT TRANSFORMER TP9 SHUTDOWN 4 SHUTDOWN SHUTDOWN UNLATCH DAG BLANKING FO PICTURE TUBES 0904 SMD SURFAC_ MOUNTED DEVICE HIGH b VOLTAGE Rg43 HIGH VOLTAGE ADJUST FIGURE 11 PTV500 SHUTDOWN CIRCUITRY 3g ...

Page 41: ...IE Y BUFF U V TONER TP53 Y DVB CRT BLANKQ J60O TO36 O TRIVIDED COLOR MDPIR _ _H PULSE I J_TEST R68B R69D HL GREEN HLBLUE HL RED B _ VERT J62OTP33 HGT _R697 R698 R699 TUNVID RED LL GREEN LL BLUE LL __J41D JBDD 0 TP41 TP6 I_ _lJ40 v SENSE 20v J305 _ 9 5v TP45 q_ 9 SV TP24 _ TPI_ _l t4 V RESET TPB8 28V C931 HIGH VOLTAGE CAPACITOR O I HS8_z _ DVR IC5SD VERT DUT TPSO V OUT TPB9 SD OU_Q IC902 _ SHUTDOWN...

Page 42: ... LPO_ER _ OV GNDj U SD I ONVERG CE EOEIVE NODULE ND SV S STAN Vr_ _tl X_DVl _ _a_ r dk GND I BOARD L _GND 2 I TO _ _ s LOMA _ 0 _ RED _ _o_j __S VHS CHROMA JACNK t PLUG KEY AVI_ AUTOMATIC VOLUME LEVEL _ _ L_z_ _ DYN DYNAMIC J610 J525 130V A t I_ CNO PO_R D NODULE RO J402 PLUG 14V _GND 1 SpA RED _E N S_ER vIGEO ouTL O_ M _G D _ GR _ _ GNDGND j PANEL_GR J OOARD oNo zi_N_Eo IN BLUE _ J60O J TgST _GND...

Page 43: ...SE use 305 I_ g 5V 11 A300 B300 SCAN OUT SCAN OUT SCAN OUT GNO SCAN N SCAN IN SCAN IN A302 B3O 14v POWER LED STEREO LED SAP LED 5V A305 C305 I ND DATA 5V J3OO _ WHITE PLUG B BOARD J KEYBOARD LED J302 I HITE PLUG J305 _ WHITE PLUG C BOARD IR RECEIVER 42 FIGURE 14 PTV5O0 CUSTOMER KEYBOARD IR RECEIVER CONNECTIONS ...

Page 44: ... I J25C 1 j J466 J410 _ D BOARD AVIO JACK PANEL J275 J276 J252 ANTENNA INPUT D250 RIGHT SPEAKER NO CONNECTION FROM OND lOOW AMP GND 4 LEFT SPEAKER 466 SCL SDA GND LEFT OUT 41GND RIGHT OUT 1SV STANDBY b 14V TO PRO LOGIC BOARD D275 GND I 1 PRO LOGIC RIGHT FROM GND I PRO LOGIC PRO LOGIC LEFT BOARD 276 SUB WOOFER GND FROM PRO LOGIC 4 BOARD 252 RIGHT SS 1 GND _ FROM GND 12 SW CH N0 CONNECTION A M P LEF...

Page 45: ...25A H225A S T M ON 0 TUN AUD RIGHT TUN AUD LEFT GND JI02 I J225A P D H BOARD AUTOMATIC VOLUME LEVEL J225 1 ST MONO I TO TUN AUD RIGH j_ AVIO TUN AUD LEFT lACK PANEL GND KEY _ VOLTAGESOURCE SIGNAL SOURCE FIGURE 16 PTV500 AUTOMATIC VOLUME LEVEL CONTROL 44 ...

Page 46: ...B FILAMENT FILAMENT 20V N BOARD r13 FOCUS1 t RED CRT _L I DAG I RED j567 r rJ_JSaO PLUG m SCREEN _ _ E600 J600 _ RED PLUG YELLOW PLUG E BOARD J401 GREEN CRT YELLOW PLUG WHITE PLUG JS6_ SVM SVM SVM 0658 FOCUS WHITE J582 PLUG SCREEN 0 BOARD BLUE CRT J570 FIGURE 17 PTV500 CRT CONNECTIONS 45 ...

Page 47: ...BOARD 5 WATT CHANNEL AMP DOAMPO17 BO03 483B 219 77456 P BOARD POWER SUPPLY MODULE OOAPWO42 BOO2 48DB 219 7747B A BOAR D SIGNAL DEFLECTION OOEMFB_I_DOO 4 MODULE 4835 219 97125 E BOARB GREEN CRT OOAPTI20 AOOl 4835 219 77468 0 BOARD BLUE CRT OOAPT122 AOOl 4835 219 77466 FOCUS G2 D STRUBUTION BLOCK 220493 5 4835 101 97018 46 FIGURE 18 PTV510 SIMPLIFIED DIAGRAM ...

Page 48: ...Philips Consumer Electronics Company Service Company Service Training 401 East Old Andrew Johnson Hwy P O Box 555 Jefferson City TN 37760 ST4121 792BC GJ PGC 1993Printed in U S A ...