Introduction - Philips PTV500 series Service Manual

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 to Delta 25 Lens.
These sets feature a stand-alone, high-end single board chassis
design for signal and high voltage circuits. The new board is
called the Signal/Deflection/High Voltage Module. A separate
basic Power Supply Module is located to the right of the main
Printed Circuit Board (PCB). Other feature differences in these
sets include Color MDPIP (Picture-in-Picture), AVIO (Audio-
Video-Input-Output) Jack Panel, CCD Comb Filter, Closed-
Caption Module, Automatic Volume Level Module (not in all
Models), and many Audio System options.
The new PTV features the TS-3D Tuning System (Figure 8).
The TS-3D Tuning System is an On-Screen, Total Remote,
Menu Driven Tuning System. The Tuning System is mounted
on the Signal/Deflection/High Voltage Module. The
Microcomputer for the Tuning System communicates via an 12C
Bus with the DAC IC, RF Switcher (optional), U/V Tuner, AVIO
Jack Panel, MDPIP Module, Closed-Caption Decoder Module,
and Convergence Panel.
Dedicated Serial Data and Serial Clock lines (SDA1 AND SCL1)
communicate with the Clock/Calendar and EEPROM IC's. The
Clock/Calendar and EEPROM IC's are used by the Tuning
System to store information needed later. The DAC (Digital-to-
Analog Convertor) IC receives serial digital data from the
Microcomputer and converts it into analog information for the
Brightness, Picture, Color, Tint, and Sharpness controls. A
Character Generator IC develops the RGB and Fast Blanking
signals for the On-Screen Graphics.
The PTV Signal/Deflection/High Voltage Module also features
an IF Signal Processor integrated circuit (IC200) and a NTSC
Signal Processor IC (IC600). The RGB signals from IC600 are
sent to the CRTs. A full-featured, one-chip, SteTeo Decoder IC
(IC120) is also included on the Signal/Deflection/Hiah VoltaGe
Module.
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