Philips FM242, Service Manual

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Service Modes, Error Codes and Fault Finding EN 16 FM242 AA 5.
Black and white picture
Increase the COLOUR value when the picture improves after
you have switched on the Customer Service Mode. The new
value is automatically stored.
Menu text not sharp enough
Decrease the CONTRAST value when the picture improves
after you have switched on the Customer Service Mode. The
new value is automatically stored.
5.3.2 Sound Problems
(if valid, related to speaker-version yes or no)
No sound from left or right speaker
Check item 'Volume' in the CSM mode. If value is low, increase
the volume level. The new value is automatically stored.
No sound or sound too loud (after channel change/
switching on)
Increase/decrease the VOLUME level when the volume is OK
after you switched on the CSM. The new 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 (Dealer Service Tool),
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 RS232 cable between PC and the (defective) product.
The ComPair faultfinding program is able to determine the
problem of the defective monitor. ComPair can gather
diagnostic information in two ways:
•
Automatic (by communication with the monitor): ComPair
can automatically read out the contents of the entire error
buffer. Diagnosis is done on I2C level. ComPair can send
and receive commands to the micro controller of the
monitor, and so can access the I2C bus of the monitor. In
this way, it is possible for ComPair to communicate (read
and write) to devices on the I2C busses of the FTV monitor.
• Manually (by asking questions to you): Automatic
diagnosis is only possible if the micro controller of the
monitor 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
F7 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:
•
Software upgrading (upload possible to OTC and PW
Scaler).
• Emulation of the (European) 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
C2228 (Schematic/Panel) of the SCAVIO panel. 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.
5.4.3 How to Connect
1. First, install the ComPair Browser software on your PC
(read the installation instructions carefully).
2. Connect an RS232 interface cable between a free serial
(COM) port on your PC and the RS232 connector on the
FM242 plasma monitor.
3. Switch the plasma monitor 'off' and 'on' again (with the
Mains switch).
4. Start the ComPair program and follow the instructions.
Note: once the set is in ComPair mode, the front LED will blink
red, at a frequency of 0.3 Hz.
5.4.4 How to Order
ComPair order codes:
•
Starter kit ComPair32 software (registration version): 3122
785 60040.
• ComPair32 CD (update): 3122 785 60070.
• Starter kit SearchMan32 software: 3122 785 60050.
• SearchMan32 CD (update): 3122 785 60080.
Note: The RS232 cable is not included. It is a standard cable
(9p sub-D male-to-female) that can be obtained by a computer
store. It is supplied however with the ComPair interface (4822
727 21631), necessary for servicing other Philips TVs.
5.5 Error Buffer
The error code buffer contains all detected errors since the last
time the buffer was erased. The buffer is written from left to
right. When an error occurs that is not yet in the error code
buffer, it is written at the left side and all other errors shift one
position to the right.
5.5.1 How to Read the Error Buffer
Use one of the following methods:
•
On screen via the SAM (only if you have a picture).
Examples:
–
Errors: 6 0 0 0 0, error code 6 is the last and only
detected error.
– Errors: 9 6 0 0 0, error code 6 was first detected and
error code 9 is the last detected (newest) error.
• Via the blinking LED procedure (when you have no
picture). See paragraph “The blinking led procedure”.
• Via ComPair.