Related Manuals for Philips PTV500 series
Summary of Contents for Philips PTV500 series
- Page 1 Philips Consumer Electronics Company A Division of North American Philips Corporation In-Home Service Guide Projection Television PTV500 Series...
-
Page 2: Table Of Contents
1993 PTV500 CHASSIS IN-HOME TROUBLESHOOTING GUIDE CONTENTS Subjects ................Page SECTION General: Servicing and Safety Precautions ........Introduction ..............Signal Flow ..............PTV Power Supply Module ..........Shutdown Circuitry ............SECTION Troubleshooting the PTV System: Access ................Diagnostic LEDs of the Power Supply ......Deflection Failures, Video Blanking,... - Page 3 Screen (G2) Adjustment Procedure ........ 19 Gray Scale Tracking, Sub-Brightness Adjustment Procedure ......20 Screen Geometric And Centering Adjustments ....21 Green Screen Geometry Adjustments ......22 Blue Screen Convergence Procedure ......22 Red Screen Convergence Procedure ......23 Programming Factory Default Values ......25 Test Mode Entry and Exit ..........
-
Page 4: Servicing And Safety Precautions
SECTION Servicing And Safety Precautions Always use safe servicing procedures: Use an Isolation Transformer when servicing the Projection Television to protect both the set and test equipment. Be careful of shock hazard when operating the set with the back removed. When servicing the CRTs, always wear safety glasses. -
Page 5: Introduction
Introduction The 1993 Projection Television (PTV) comes in three basic con- figurations, the PTV510, PTV520, and PTV535 Series (see Figures 1 through Figure 6 in Simplified Drawings section). Figure 7 shows the new 72 degree light path. The CRT's are 90 degree Hitachi tubes which are matched... -
Page 6: Signal Flow
Signal Flow The Signal/Deflection/High Voltage Module features split Audio and Video IF processing. The TV signal is.applied to the U/V Tuner, or through an optional RF Switch then to the UN Tuner. The IF signal is developed in the UN Tuner and sent through dual output SAW Filter to the Audio... -
Page 7: Ptv Power Supply Module
The composite video signal from the Switch IC is also applied to the NTSC Signal Processor to develop sync for the Vertical and Horizontal Oscillators. The horizontal drive signal is applied to the Horizontal Circuitry where the scan-derived voltages developed. The Horizontal Pulse (H Pulse) is sent to the High Voltage... -
Page 8: Shutdown Circuitry
Regulator, Q401. Regulation is accomplished by monitoring the 130V Source via a voltage divider network. This feedback refer- ence voltage is sent through the Control IC and the Output Voltage Regulator Opto-lsolator to the Dual Controller IC. The 130V Source can be adjusted by changing the reference volt- age via the 130V Adjust potentiometer. - Page 9 A sample of the High Voltage is taken from Pin 15 of T900 and applied to the Programmable Shunt Regulator, IC901-1. This sample can be adjusted by R943 to attain the desired High Voltage. IC901 sends the product of this sample voltage through...
-
Page 10: Troubleshooting The Ptv System
SECTION Troubleshooting the PTV System: Access To gain access to the various Modules and Panels in the PTV, such as the Convergence Panel, CRT Boards, and Yokes - pro- ceed as follows: Gently pull off the two plastic railings on either side of the Customer Keyboard. -
Page 11: Deflection Failures, Video Blanking, And High Voltage Shutdown
should be present. If not, the Standby Power Supply circuitry should be repaired or the Module should be replaced. If the Standby Supplies are okay and the Full Power Supplies do not come up to normal voltage, repair the Full Power Supply or replace the Module. -
Page 12: Video Troubles
than 10 volts) and Q5OO will not be turned On. The collector of Q5OO will be Low and the high voltage will be shutdown and video blanking will occur. The high voltage is shut down because the base of Q502 is Low and the emitter of Q502 pulls down the high voltage Slow-Start capacitor, C911. -
Page 13: In-Home Adjustments
SECTION In-Home Adjustments: Caution: The PTV510/520/535 incorporate a "HOT" ground system on the Power Supply Module. Always use an Isolation Transformer when applying power to the exposed chassis. Ground Connections For Test Equipment The TUNING SHIELD can be used as the COLD GROUND connection for ALL COLD GROUND related measurements... -
Page 14: Vco & Aft Adjustment
Slowly advance R202 clockwise (CW) to a point slightly beyond the point of minimum snow. Note: Do not advance the control any further as it may result in an overload caused by a strong signal, The range of the AGC voltage supplied to Pin 5 of the U/V Tuner will vary from 8Vdc... -
Page 15: Sound Alignment
Sound Alignment Select an active channel and loosely couple the antenna until noise/distortion is apparent in the output. While keeping input signal weak enough to produce noise, adjust the Sound Discriminator (L201) for maximum output and minimum distortion. Sub-Contrast Alignment (this adjustment requires the use of equipment... -
Page 16: Dynamic Gamma
Dynamic Gamma (this adjustment requires the use of equip- ment not normally carried into the home) .Apply a Crosshatch pattern utilizing 1001RE (100% white) to the antenna terminals (Very important step, anything less than 1001RE will not work correctly). Tune set to this signal and adjust the Customer Brightness and Picture Controls to maximum. -
Page 17: Vertical Height Adjustment
Connect an Oscilloscope to the emitter of Q200 (Test Point TP1) and adjust the Video Level Pot (R244) until the video signal observed on the Oscilloscope is 2Vp-p +/-50mV. Vertical Height Adjustment (this adjustment requires the use of equipment not normally carried into the home) Apply a crosshatch pattern to the antenna input terminals. -
Page 18: Stereo Decoder Alignments
board nearest you). Adjust R455 (also located in the top corner of the board) to achieve 130Vdc +/-.5Vdc). Stereo Decoder Alignments (this adjustment requires the use of equipment not normally carried into the home) Note: Several of the adjustments below require a Leader Model LMS-238P MTS Stereo Alignment... -
Page 19: 300Hz Separation
300Hz Separation Connect the LMS-238P Generator to the Antenna input. Set the Generator as follows: Mode Switch set to L Channel, Internal Frequency set to 300Hz, SAP On, Pilot On, and Level Control pushed In. Connect an AC Millivolt Meter to Test Point 66. Adjust R107 for a null reading on the meter. -
Page 20: Screen (G2) Adjustment Procedure
Move the wing nut in the slot of the uncovered Lens to locate the optimum optical focus point (viewing the picture from the back side of the screen), re-tighten the wing nut. Repeat steps 2 through 4 for the 2 other Output Lenses. Screen (G2) Adjustment Procedure... -
Page 21: Gray Scale Tracking
Connect a 2.4K resistor from Pin 6 of the J-Test Connector to Pin 3 (Red) of the same J-Test Connector (this forces the Red cathode to 195Vdc). Adjust the Red G2 (bottom row, left) to just barely turn On the Red CRT. Now, do the same for the Green Output by connecting same 2.4K resistor from Pin 6 of the J-Test Connector to Pin... -
Page 22: Screen Geometric And Centering Adjustments
Keep all Hi-Lite Controls as near clockwise as possible. least one Hi-Lite Control must remain in it's full clockwise position. Repeat steps 7 through 9 as needed to achieve gray in the darkest areas of the picture and white in the bright areas. Always adjust Lo-Lite controls... -
Page 23: Green Screen Geometry Adjustments
To prevent customer controls from affecting adjustments, connect jumpers from the bottom of the following resistors to ground: R504, R505, R506 and R507 (the top Pin of the Setup terminal is ground). Also. tie the lower Pin of the Setup terminal to ground (this is to temporally disable the... -
Page 24: Red Screen Convergence Procedure
By rotating the Yoke, visually adjust the Blue horizontal Skew at the center portion of the screen (the upper and lower por- tions may not be properly aligned). Re-tighten the Yoke clamp. Remove ONLY the lower Setup Pin Jumper, enabling Convergence Panel Controls. -
Page 25: Test Mode Entry And Exit
Uncover the Blue Output Lens. Remove Jumpers from the resistors mentioned in Step 3 of "Setup". Adjust Customer Convergence Controls accessible from the On- Screen Menu. Programming Factory Default Values The chassis is controlled by an On-Board Microcomputer which is part of the TS-3D Tuning System. -
Page 26: Programming Factory Default Values
bottom of the screen. The first line of text has the version software currently operating (left side) and the "run timer" data in hexadecimal form (right side). The second line, starting from the left, has the currently tuned channel, the Test Mode letter, the selected register number hexadecimal value... -
Page 27: System Information/Diagnostics
Sharpness Bass/Rear Volume Treble/Center Volume Balance Foreground Intensity OSD Vertical Position OSD Horizontal Position Red Convergence Horizontal Red Convergence Vertical Blue Convergence Horizontal Blue Convergence Vertical PIP Color PIP Tint Graphic Equalizer Level 4kHz Graphic Equalizer Level 12kHz Graphic Equalizer Level lkHz Graphic Equalizer Level 255Hz... - Page 28 K. Graphic Equalizer #2 Pro-Logic Board) Pro-Logic Controller Pro-Logic Board) M. Pro-Logic Controller Pro-Logic Board) N. Sound Processor Pro-Logic Board) O. JD-13 Sensing Jack Panel) JD-15 Sensing Jack Panel) Q. Remote Locator Not Used) R. Closed-Caption Decoder (On Sig/Def/HV Module)
-
Page 30: Simplified Drawings
SECTION 4 Simplified Drawings: SCREEN ASSEMBLY II F_ CUSTOMER KEYBOARD CRT's SPEAKER SPEAKER _PT122A001 4835-219-77468 €855-219-77466 4855-219-77467 APTt21AO01 CONVERGENCE BOARDS PANEL ---1I. A10524AO01 4835-219-77454 FIGURE 1 - PTV510 FRONTVIEW... - Page 31 MIRROR ASSEMBLY POWER SUPPLY APWO42BOO2 SIONAL/OEFL[CTION/HIGH VOLTAGE 4B35-219-7747D MODULE £MF5DIOOD4 2XDW 4835-219-D7125 AMP017B003 4835-219-77456 j..:: ---..L'-" FOCUS DIDTR_UTION PANEL BLOCK 220493-5 4835-101-97018 FIGURE 2 - PTV510 REARVIEW...
- Page 32 SCREEN ASSEMBLY CUSTOMER KEYBOARD CRT's SPEAKER APT12DA00t APT122AOD1 4855-219-77468 APT121AO01 CONVERGENCE PANEL 4835-219-77466[Z_ZZZ] "/ 4835-219-77467_._I_Z_Z] AIO524BO02 _CRT 4835-219-77473 BOARDS __J[ = !=!=!_'=_!=='!., _][I ..• • • • FIGURE 3 - PTV520 FRONTVIEW...
- Page 33 MIRROR ASSEMBLY POWER SUPPLY MOOUL[ DZDNAL/OEFL[CTION/H[GH VOLTAGE APWO42BOO2 UODUL[ 4835-219-77475 EMFSO2D004 4835-219-g7126 :ZXSW kMPO17OOO3 PZP MODULE €835-219-77456 APP012-ADDI 4835-219-57418 r ..Lz..FOCUS MODULE DISTR]_UTION AV_O JACK PANEL 0522-8OQ2 AVJIOD-DOO4 BLOCK 35-219-77478 220493-5 4835-101-97018 4635-219÷77472 FIGURE 4 - PTV520 REARVIEW...
- Page 34 SCREEN ASSEMBLY , r_ I( o )1 TWEETER tWEETER CUSTOMER KEYBOARD CRT's SPEAKER SPEAKER i_pT124_A001 4835-219-7748g _835-219-77491 4835-219-77492 APT125-AO01 CONVERGENCE _CRT --Ill. PANEL BOARDS AIOB19AOOl 4835-219-77452 FIGURE 5 - PTV535 FRONTVIEW...
- Page 35 MIRROR ASSEMBLY VOLTAGE rSIGNAL/DEFLECTION/HIGH POWER 2X12,5W _219-77375 SUPPLY AMPOt9-AO01 AMPO16-AOOl MODULE [PRO-LOGIC MODULE COLOR MODULE MDPIP A10467-A001 /APPO12-A001 4835-219-77383 48_5-219-57418 IOOW AUDIO APW036-CO03 835-21S-77457 OWER SUPPLY o,s,B o,IO, BLOCK /"] 220493-5 4_35-219-77478 FIGURE 6 - PTV535 REARVIEW...
- Page 36 MIRROR FRONT SCREEN THIN LINE CABINET FIGURE 7 - PTV 72 DEGREE LIGHT PATH...
-
Page 37: Ptv500 Block Diagram
DEFLECTION YOKES 120VAC (130V, 26V, 15V, 15V-STBy, & 5V-STBY) POWER SUPPLY MODULE PULSE AUDIO AUDIO TCHER ACCI (OPTIONAL) V[0£O CABLE I+xr IVZO SIGNAL PROCESSO I.oo JACK PANEL ,OWNI f" HORIZ 1C550 VERT VERTICAL VERT DEFLECTION 1C600 NTSC SIGNAL PROCESSOR w_wwww_wwww_w_,J FIGURE 8 - PTV500 BLOCK DIAGRAM... - Page 38 T401 FULL-POWER TRANSFORMER 155VDC t30V RECTIFIER 120VAC BRIDGE • FULL-POWER REGULATOR • 5"IVTC10 OUTPUT VOLTAGE IC405 2._5V OPTO-ISOLATOR REGULATOR 1613 IC401 R416 DUAL CONTROLLER ON/OFF • 15V-STBY OPTO-ISOLATOR IC406 T402 • STANDBY 16"I" R 415 TRANSFORMERI v I ±56K ,---, .
- Page 39 AUDIO POWER SMPS & P467 J402 P402 A402 J467 J462 130V-A J461 1SV-A I_I_220VAC NEU I PLUG yHOT YELLOW 9V-A SOLDERED J405 _,403 ,340: STBY 5V/1 5V 15V-A STBY W/OFF PLUG PLUG 130V _'_ -_220V WHITE RESET .-_,,-_ 28 v "P"...
- Page 40 T900 15ewe OUTPUT TRANSFORMER HIGH b VOLTAGE TP38 HIGH VOLTAGE FREQUENCY CHECK Qgo1" ROI* SHUTDOWN HOR[Z SHUTDOWN © SHUTDOWN SHUTDOWN UNLATCH PULSE " INVERTER TP67 HIGH VOLTAGE FREQUENCY DISABLE FROM Rg43 BEAM CURRENT HIGH LIMITER VOLTAGE ADJUST HORII PULSE 0904" •...
- Page 41 R123 __J41D JBDD J225A 01011_ _R122 E(_C_ @BTBD1BATTERY TPB9 TP41 I_;_lJ40] v SENSE -20v SD OU_Q 3KHZ TP27 @ S,EREO , D, DL DAL .ICROCO 0OTEB IC902 1C120 JID2 IC303 ICBDI J305 9.5v TP45 SHUTDOWN q_-9.SV TP24 TPI_ [CBDO CONTROL I DECODER r--,I IC3O4/...
-
Page 42: Figure 13 - Ptv500 Cable Connections
GND/130V-E +9.SV _SCAN jTAOcK PANEL _-H PULSE TO FROM SCAN V PULSE 5v._ CU_IOMER 15V-B STANDBY -CONVERDENCE SAPLED_ KE_OARD/SCA_O..\\\\ INt/EXT /////'*_'PU,Sr BOARD (Uy; "v ((/////, CUSTOMER STEREO SCAN " KEYBOARD POWER SCAN 14VD J225, _\_// ,_,E_;2_3 \_ll[l/( J4o, J,o, _-RED I IZ;2]' _ =ltrr Jsoo... -
Page 43: Connections
J3OO A300 B300 SCAN SCAN SCAN WHITE PLUG SCAN SCAN .: l SCAN "B" BOARD KEYBOARD &: LED "A" BOARD J302 A302 B3O: S_ONAL/DEFLECTIO. W..E : _" POWER SIGNAL/DEFLECTION _i30i STEREO PLUG HITE SCAN _FIL DERIVED -_-2ov -_1,- HORI Z PULSE SUPPLIES use ,305 J305... -
Page 44: Figure 15 - Ptv500 Jack Panel Connections
CIRCUIT PTVSI0 PTV520 PTV535 D250 INT/EXT USED S-VHS2 SENSE lll_'_" I A225 D225 J225 J25C i,K, i.oT OSE° i,O,E i P.O-LO0 SE.SE f .._ RIGHT SPEAKER CONNECTION FROM RIGHT • lOOW _//L LEFT LEFT SPEAKER )466 J466 " SDA SVHS LUMA LEFT... - Page 45 AI02 HI02 JI02 J102 "H" BOARD AUTOMATIC "1 VOLUME LEVEL ---• ST/MONO SIGNAL/DEFLECTION ----• TUN LEFT ,lACK A225A H225A PANEL J225A ---• ---• RIGH'[ j_ AVIO S-T-//M ON 0 J225 RIGHT LEFT J225A KEY _ = VOLTAGESOURCE • SIGNAL SOURCE FIGURE 16 - PTV500 AUTOMATIC VOLUME...
-
Page 46: Figure 17 - Ptv500 Crt Connections
"N" BOARD FOCUS1---t----@ [):_L---I. DAG j567=r ' rJ_JSaO PLUG SCREEN"--_ _ A600 E600 J600 PLUG RED DRIVE YELLOW PLUG GREEN DRIVE BLUE DRIVE "E" BOARD J401 GREEN \401 220V NO CONNECTION 15OV-B YELLOW FILAMENT PLUG FILAMENT -20V WHITE PLUG JS6_ 0658 FOCUS WHITE... - Page 47 "C" BOARD RECEKVER OOARRO12-kOO| 4835-219-77378 "D" BOARD "L" BOARD JACK PANEL MODULE WATT/CHANNEL OOAVJ145-AOOl DOAMPO17-BO03 4835-219-B7425 483B-219-77456 "B" BOARD KEYBOARD/LED OOATC633-BOO2 4835-219-3_046 "P" BOARD "E" BOARB "A" BOAR POWER SUPPLY MODULE GREEN SIGNAL DEFLECTION OOEMFB_I_DOO MODULE OOAPWO42-BOO2 OOAPTI20-AOOl 48DB-219-7747B 4835-219-77468 4835-219-97125 "0"...
- 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.