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Philips Consumer Electronics Company A Division of North American Philips Corporation In-Home Service Guide Projection Television PTV500 Series...
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.
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...
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...
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...
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.
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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...
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.
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.
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.
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...
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...
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...
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.
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.
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...
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.
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...
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...
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...
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...
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.
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.
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...
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...
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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)
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...
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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...