Service Modes, Error Codes, and Fault Finding
EN 12
LC4.1U AA
5.
Black and white picture
If:
•
The picture improves after you have pressed the AUTO
PICTURE button on the remote control transmitter,
Then:
1.
Press the AUTO PICTURE button on the remote control
transmitter repeatedly (if necessary) to choose
PERSONAL picture mode.
2.
Press the MENU button on the remote control transmitter.
This brings up the normal user menu.
3.
In the normal user menu, use the MENU UP/DOWN keys
to highlight the PICTURE sub menu.
4.
Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5.
Use the MENU UP/DOWN keys to select COLOUR.
6.
Press the MENU RIGHT key to increase the COLOUR
value.
7.
Press the MENU button on the remote control transmitter
twice to exit the user menu.
8.
The new PERSONAL preference value is automatically
stored.
Menu text not sharp enough
If:
•
The picture improves after you have pressed the AUTO
PICTURE button on the remote control transmitter,
Then:
1.
Press the AUTO PICTURE button on the remote control
transmitter repeatedly (if necessary) to choose
PERSONAL picture mode.
2.
Press the MENU button on the remote control transmitter.
This brings up the normal user menu.
3.
In the normal user menu, use the MENU UP/DOWN keys
to highlight the PICTURE sub menu.
4.
Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5.
Use the MENU UP/DOWN keys to select PICTURE.
6.
Press the MENU LEFT key to decrease the PICTURE
value.
7.
Press the MENU button on the remote control transmitter
twice to exit the user menu.
8.
The new PERSONAL preference value is automatically
stored.
5.4
ComPair
5.4.1
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 I
2
C level) and
is therefore capable of accurately indicating problem areas.
You do not have to know anything about I
2
C 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 SearchMan electronic manual of the defective chassis,
schematics and PWBs are only a mouse click away.
5.4.2
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.
For 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:
•
Automatic (by communication with the television): ComPair
can automatically read out the contents of the entire error
buffer. Diagnosis is done on I
2
C level. ComPair can access
the I
2
C bus of the television. ComPair can send and
receive I
2
C 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 I
2
C busses
of the TV-set.
•
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 extends.
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 oscillogram 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.
Beside fault finding, ComPair provides some
additional
features
like:
•
Up- or downloading of pre-sets.
•
Managing of pre-set lists.
•
Emulation of the Dealer Service Tool (DST).
•
If both ComPair and SearchMan (Electronic Service
Manual) are installed, all the schematics and the PWBs of
the set are available by clicking on the appropriate
hyperlink.
Example
:
Measure the DC-voltage on capacitor C2568
(Schematic/Panel) at the Mono-carrier
.
–
Click on the “Panel” hyperlink to automatically show
the PWB with a highlighted capacitor C2568.
–
Click on the “Schematic” hyperlink to automatically
show the position of the highlighted capacitor.