Philips 32PFL9603D/10 Service Manual page 25

action holder: MIPS
action holder: St-by
autonomous action
If needed to speed up this transition,
this block could be omitted . This is
depending on the outcome of the
safety investigations .
5.4 Service Tools
5.4.1 ComPair
Introduction
ComPair (Computer Aided Repair) is a Service tool for Philips
Consumer Electronics products. and offers the following:
1. ComPair helps to quickly get an understanding on how to
repair the chassis in a short and effective way.
2. ComPair allows very detailed diagnostics and is therefore
capable of accurately indicating problem areas. No
2
knowledge on I C or UART commands is necessary,
because ComPair takes care of this.
Service Modes, Error Codes, and Fault Finding
Log the appropriate error and
set stand-by flag in NVM
Redefine wake up reasons for protection
state and transfer to stand-by µP.
Switch off LCD lamp supply
Wait 250ms (min. = 200ms)
Switch off LVDS signal
Switch off 12V LCD supply within a time frame of
min. 0.5ms to max. 50ms after LVDS switch off.
Ask stand-by µP to enter protection state
Switch AVC in reset state
Switch the NVM reset line HIGH.
Disable all supply related protections and switch off
the +1V8 and the +3V3 DC/DC converter.
Switch OFF all supplies by switching HIGH the
Flash the Protection-LED in order to indicate
Protection
Figure 5-11 "To Protection State" flowchart
MP
Wait 10ms
Wait 5ms
Standby I/O line.
protection state* (*): This can be the standby LED or the ON LED
depending on the availability in the set
3. ComPair speeds up the repair time since it can
automatically communicate with the chassis (when the uP
is working) and all repair information is directly available.
4. ComPair features TV software up possibilities.
Specifications
ComPair consists of a Windows based fault finding program
and an interface box between PC and the (defective) product.
The ComPair II interface box is connected to the PC via an
USB cable. For the TV chassis, the ComPair interface box and
the TV communicate via a bi-directional cable via the service
connector(s).
The ComPair fault finding program is able to determine the
problem of the defective television, by a combination of
automatic diagnostics and an interactive question/answer
procedure.
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