Philips 20PT643F Service Manual page 80

Introduction
The 'L01.1U AC' chassis is a global TV chassis for the model year 2003 and is used for
TV sets with screen sizes from 20" - 32" (large screen), in Super Flat, Real Flat, and
Wide Screen executions. In comparison to its predecessor (the 'L01.1U AB'), the
chassis has enhanced features like a 2D 3-line Comb-filter and 'Active Control'.
The standard architecture consists of a Mono Carrier, a Picture Tube panel, a Side I/O
panel, and a Top Control panel.
The Mono Carrier consists primarily of conventional components with hardly any
surface mounted devices.
Figure: Mono Carrier component side
The functions for video processing, microprocessor (P), and teletext (TXT) decoder are
combined in one IC (TDA958xH), the so-called Ultimate One Chip (UOC). This chip is
(surface) mounted on the copper side of the LSP.