Philips 26FW5220, Руководство по обслуживанию

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ComPair
Introduction
ComPair (Computer Aided Repair) is a service tool for Philips Consumer Electronics products.
ComPair is a further development on the European DST (service remote control), which allows
faster and more accurate diagnostics. ComPair has three big advantages:
ComPair helps you to quickly get an understanding on how to repair the chassis in a short
time by guiding you systematically through the repair procedures.
ComPair allows very detailed diagnostics (on I2C level) and is therefore capable of
accurately indicating problem areas. You do not have to know anything about I2C
commands yourself because ComPair takes care of this.
ComPair speeds up the repair time since it can automatically communicate with the chassis
(when the microprocessor is working) and all repair information is directly available. When
ComPair is installed together with the Force electronic manual of the defective chassis,
schematics and PWBs are only a mouse click away.
Specifications
ComPair consists of a Windows based faultfinding program and an interface box between PC
and the (defective) product. The ComPair interface box is connected to the PC via a serial or
RS232 cable.
In this chassis, the ComPair interface box and the TV communicate via a bi-directional service
cable via the service connector.
The ComPair faultfinding program is able to determine the problem of the defective television.
ComPair can gather diagnostic information in two ways:
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Automatic (by communication with the television): ComPair can automatically read out the
contents of the entire error buffer. Diagnosis is done on I2C level. ComPair can access the
I2C bus of the television. ComPair can send and receive I2C commands to the micro
controller of the television. In this way, it is possible for ComPair to communicate (read and
write) to devices on the I2C busses of the TV-set.
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Manually (by asking questions to you): Automatic diagnosis is only possible if the micro
controller of the television is working correctly and only to a certain extend. When this is not
the case, ComPair will guide you through the faultfinding tree by asking you questions (e.g.
Does the screen give a picture? Click on the correct answer: YES / NO) and showing you
examples (e.g. Measure test-point I7 and click on the correct waveform you see on the
oscilloscope) . You can answer by clicking on a link (e.g., text or a waveform picture) that will
bring you to the next step in the faultfinding process.
By a combination of automatic diagnostics and an interactive question / answer procedure,
ComPair will enable you to find most problems in a fast and effective way.