Magnavox 27TP83 C101 Wartungshandbuch PDF herunterladen (Seite 17)

F8 CHASSIS INTRODUCTION

The F8 chassis is a leader TV chassis produced by Philips Consumer Electronics

Company for the 1999 model year. The F8 chassis is used in sets with 25“ and

27“ screen sizes. The F8 chassis is a global design and is oriented front to rear, or

”north to south“, as it has been called. The F8 chassis tuning system features 181

channels with on-screen display (OSD). The main tuning system uses a tuner, a

microcomputer IC, and a memory IC mounted on the main chassis. The

microcomputer communicates with the memory IC, the customer keyboard,

remote receiver, U/V tuner, signal processor IC and the audio output IC via the

C bus.

The memory IC retains the settings for favorite stations,

customer-preferred settings, and service/factory data.

The F8 chassis uses a Very Large Scale (VLSI) Integrated Circuit for signal

processing. This IC performs video IF, sound IF processing, AGC control, horizontal

and vertical drive and synchronization, also luminance/chrominance processing. The

on-screen graphics and closed caption decoding are done within the microprocessor,

and then sent to the signal processor IC to be added to the main signal.

The F8 chassis utilizes a switch mode power supply for the main voltage source.

The chassis has a hot chassis ground reference on the primary side of the power

supply, and a cold ground reference on the secondary side of the power supply

and the rest of the chassis. ALWAYS USE AN ISOLATION TRANSFORMER

WHEN SERVICING THIS CHASSIS FOR YOUR SAFETY.

MODEL TO MODULE LIST

The model to Module list shown below identifies all electrical panels, modules

and assemblies used in each model produced with the F8 chassis. This

information was current at time of printing.

Information concerning cabinet parts and cabinet mounted parts (CRT/Yoke/etc.)

is shown in the Cabinet Replacement Parts List.

Replacement part numbers for each module are provided in the Chassis Panel

Replacement Parts List.

If you are attempting to service a model equipped with the F8 chassis, the

necessary electrical information should be covered in this service manual, even if

the corresponding model number is not listed.

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Magnavox 27TP83 C101 Wartungshandbuch Seite 17