Table Of Contents - Philips PTV400 series Service Manual

1992 P1 v CHASSIS IN-HOME TROUBLESHOOTING GUIDE
CONTENTS
Subject
SECTION 1
General:
Page
Servicing and Safety Precautions ........................................................ 3
Introduction .......................................................................................... 4
Signal Flow .......................................................................................... 4
Power Supply ....................................................................................... 5
System Shutdown ................................................................................ 6
SECTION 2
Troubleshooting the PTV System:
Access ................................................................................................. 8
Diagnostic LEDs of the Power Supply ................................................. 8
Deflection Failures, Video Blanking, and High Voltage Shutdown ....... 9
Video Troubles ..................................................................................... 9
SECTION 3
In-Home Adjustments:
Ground Connections For Test Equipment ......................................... 11
Unless Otherwise Specified: .............................................................. t t
On-Screen Menu Positioning ............................................................. 11
RF AGC Delay ................................................................................... 11
VCO & AFT Adjustment ..................................................................... 11
Sound Alignment ................................................................................ 12
Sub-Contrast Alignment ..................................................................... 12
Comb Filter Alignment ....................................................................... 12
Sub-Brightness Adjustment ............................................................... 13
Dynamic Gamma ............................................................................... 13
High Voltage Frequency Adjustment ................................................. 13
Video Level Alignment ....................................................................... 14
Vertical Height Adjustment ................................................................. 14
Vertical Blanker Adjustment ............................................................... 14
130Vdc Adjust .................................................................................... 15
Stereo Decoder Alignments ............................................................... 15
Composite Input Level Adjustment .................................................... 15
Stereo DBX Filter ............................................................................... 15
Pilot VCO Adjustment ........................................................................ t 5
300Hz Separation .............................................................................. 16
3kHz Separation ................................................................................ 16
Focus Adjustments (Electrical and Optical) ....................................... 16
Screen (G2) Adjustment Procedure ................................................... 17
Gray Scale Tracking, Sub-Brightness Adjustment Procedure ........... 18
Screen Geometric And Centering Adjustments ................................. 19
Green Screen Geometry Adjustments ............................................... 19
Blue Screen Convergence Procedure ............................................... 20
Red Screen Convergence Procedure ................................................ 20
Programming Factory Default Values ................................................ 21
Test Mode Entry and Exit ................................................................... 21
Adjustment of Registers in Test Mode ............................................... 22
Description of Test Mode "C". ............................................................ 22
Description of System Information/Diagnostics ................................. 23
SECTION 4
Simplified Drawings:
Figure 1 - PTV410 Frontview ............................................................. 25
Figure 2 - PTV410 Rearview .............................................................. 26
Figure 3 - PTV420 Frontview ............................................................. 27
Figure 4 - PTV420 Rearview .............................................................. 28
Figure 5 - PTV430 Frontview ............................................................. 29
Figure 6 - PTV430 Rearview .............................................................. 30
Figure 7 - PTV400 Block Diagram ..................................................... 31
Figure 8 - PTV Power Supply Module Block Diagram ....................... 32
Figure 9 - PTV400 Power Supply Connections ................................. 33
Figure 10 - PTV400 Shutdown Circuitry ............................................ 34
Figure 11 - PTV400 Signal/Deflection Module Layout ....................... 35
Figure 12 - PTV400 Cable Connections ............................................ 36
Figure 13 - PTV400 Customer Keyboard
& IR Receiver Connections ............................................. 37
Figure 14 - PTV400 Jack Panel Connections .................................... 38
Figure 15 - PTV400 CRT Connections .............................................. 39
Figure 16 - PTV4t0 Simplified Diagram ............................................ 40
HLG
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