Schematic Notes - Philips 13PT30L1 Service Manual

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.
-
PLACE THE TELEVISION SET IN SDM (SERVICE DEFAULT MODE). TO ENTER SDM,
-
PRESS 0-6-2-5-9-6-MENU ON THE REMOTE CONTROL.
- ALL VOLTAGES WERE TAKEN FROM MODEL PR1390C121.
2. ALL WAVEFORMS WERE TAKEN WITH AN NTSC SIGNAL GENERATOR DELIVERING 10mVp-p AT
THE ANTENNA INPUT.
3. VOLTAGES SHOWN WITHOUT PARENTHESES WERE TAKEN WITH AN NTSC SIGNAL
GENERATOR DELIVERING 10mVp-p AT THE ANTENNA INPUT.
4. VOLTAGES SHOWN IN PARENTHESES WERE TAKEN WITH NO SIGNAL APPLIED. THEY ARE
SHOWN ONLY WHERE AN APPRECIABLE CHANGE IS NOTED.
5. VOLTAGES SHOWN ENCLOSED IN A RECTANGLE WERE TAKEN WITH THE SET IN STANDBY
MODE (POWER SUPPLIED TO THE CHASSIS, TELEVISION SET TURNED OFF).
6. ALL VOLTAGES ARE POSITIVE DC WITH RESPECT TO THE GROUND IN THAT SECTION OF THE
CHASSIS, AND MAY VARY DUE TO NORMAL PRODUCTION TOLERANCES.
7. COMPONENT SYMBOLS:
INDICATES A COMPONENT WHICH WILL VARY DEPENDING ON SCREEN SIZE, PRODUCTION
DATES, AND OPTION FEATURES INSTALLED. PLEASE SEE THE REPLACEMENT PARTS LIST
FOR SPECIFIC PART INFORMATION.
l
INDICATES A COMPONENT IS AN SMD "CHIP" TYPE COMPONENT, AND AS SUCH WILL BE
LOCATED ON THE BOTTOM SIDE OF THE CBA.
8. A HIGH VOLTAGE OSCILLOSCOPE PROBE (100:1) IS NEEDED TO MEASURE THE WAVEFORM
AT THE COLLECTOR OF THE HORIZONTAL OUTPUT TRANSISTOR (PART # 7402).
9. SPARK GAPS SHOWN ON THE CRT SCHEMATIC ARE INTERNAL TO THE CRT SOCKET.
10. THE DESIGNATORS A3 THROUGH V10, SHOWN ENCLOSED WITHIN BOXES, CORRESPOND TO
THE WAVEFORM PHOTOGRAPHS.
11. FOR VOLTAGE, WATTAGE, AND TOLERANCE RATINGS OF RESISTORS AND CAPACITORS,
PLEASE SEE THE ELECTRICAL REPLACEMENT PARTS LIST.
12. INDICATES PCE REPLACEMENT PART NUMBER ONLY.