Table Of Contents - Philips PTV500 series Service Manual

1993 PTV500 CHASSIS IN-HOME TROUBLESHOOTING GUIDE
CONTENTS
Subjects ............................................................................ Page
SECTION 1
General:
Servicing and Safety Precautions ................................... 3
Introduction ..................................................................... 4
Signal Flow ..................................................................... 5
PTV Power Supply Module ............................................. 6
Shutdown Circuitry .......................................................... 7
SECTION 2
Troubleshooting the PTV System:
Access ............................................................................ 9
Diagnostic LEDs of the Power Supply ............................ 9
Deflection Failures, Video Blanking,
and High Voltage Shutdown .......................................... 10
Video Troubles ................................................................ 11
SECTION 3
In-Home Adjustments:
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 ................................................................. 16
Stereo Decoder Alignments ............................................ 17
Composite Input Level Adjustment ................................. 17
Stereo DBX Filter ............................................................ 17
Pilot VCO Adjustment ................................. :.; ................. 17
300Hz Separation ........................................................... 18
3kHz Separation ............................................................. 18
Focus Adjustments (Electrical and Optical) ........ i ........... 18