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LARGE SIGNAL PANEL SCHEMATIC AND WAVEFORM NOTES:
1.
ALL VOLTAGES AND WAVEFORMS WERE TAKEN WITH AN NTSC COLOR BAR
PATTERN SIGNAL APPLIED.
2.
SWEEP TIME/DIV SETTINGS ARE SHOWN JUST BELOW THE PHOTOS IN THE
CALIBRATED POSITION. HORIZONTAL POSITIONING OF THE WAVEFORMS WAS
ADJUSTED FOR MAXIMUM CLARITY.
LARGE SIGNAL PANEL SCHEMATIC NOTES:
UNLESS OTHERWISE SPECIFIED:
1.
ALL VOLTAGES AND WAVEFORMS WERE TAKEN UNDER THE FOLLOWING
CONDITIONS:
•
LINE VOLTAGE MAINTAINED AT 120VAC, 60HZ VIA AN ISOLATION TRANSFORMER.
•
CUSTOMER CONTROLS SET TO FACTORY DEFAULT LEVELS AS FOLLOWS:
COLOR, TINT, AND BRIGHTNESS SET TO MIDRANGE, PICTURE SET TO
APPROXIMATELY 2/3 (BETWEEN MIDRANGE AND FULL ON).
2.
WAVEFORMS AND VOLTAGES (WITHOUT BRACKETS) WERE TAKEN WITH AN
NTSC SIGNAL GENERATOR DELIVERING 10mVp-p AT THE ANTENNA TERMINALS.
3.
VOLTAGES SHOWN WITH BRACKETS WERE TAKEN WITH NO SIGNAL APPLIED;
THEY ARE LISTED ONLY WHERE AN APPRECIABLE CHANGE WAS NOTED, OR AS
IN THE SOUND CIRCUITRY WHERE NO VOLTAGES WITH SIGNAL WERE TAKEN.
4.
ALL VOLTAGES ARE POSITIVE DC WITH RESPECT TO THE GROUND LOCATED IN
THAT AREA OF THE CIRCUITRY AND MAY VARY DUE TO NORMAL PRODUCTION
TOLERANCES. VOLTAGE SOURCES ARE ALSO NOMINAL, WITH THE EXCEPTION
OF THE +130Vdc SOURCE (TP4) WHICH IS TIGHTLY REGULATED TO BE WITHIN
+.1Vdc, -2Vdc (MEASURED WITH A .1% DIGITAL VOLTMETER).
5.
SCHEMATIC SYMBOLS:
•
INDICATES THESE COMPONENTS ARE SMD "CHIP" TYPE COMPONENTS
AND AS SUCH, WILL BE LOCATED ON THE COPPER SIDE OF THE PRINTED
CIRCUIT BOARD.
-
INDICATES THESE COMPONENTS WILL VARY DEPENDING UPON SCREEN
SIZE, PRODUCTION DATES, AND OPTIONAL FEATURES INSTALLED. SEE
THE COMPONENT CHARTS POSTED ON THE SCHEMATIC, OR THE
REPLACEMENT PARTS LIST FOR SPECIFIC PART INFORMATION.
NUMBERS 1 THROUGH 23 CORRESPOND TO WAVEFORM PHOTOS.
6.
FOR VOLTAGE, WATTAGE AND TOLERANCE RATINGS OF CAPACITORS OR
RESISTORS, REFER TO THE ELECTRICAL REPLACEMENT PARTS LIST.
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