Philips L04A AB, Service Manual, Page: 18 / 90

Service Modes, Error Codes and Fault Finding EN 18 L04A AB 5.
5.3 Problems and Solving Tips Related to CSM
5.3.1 Picture Problems
Note : The problems described below are all related to the TV
settings. The procedures used to change the value (or status)
of the different settings are described.
Picture too dark or too bright
If:
•
The picture improves when you have press the AUTO
PICTURE button on the remote control transmitter, or
• The picture improves when you enter the Customer
Service Mode
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 (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys (if necessary) to select
BRIGHTNESS.
6. Press the MENU LEFT/RIGHT keys to increase or
decrease the BRIGHTNESS value.
7. Use the MENU UP/DOWN keys to select PICTURE.
8. Press the MENU LEFT/RIGHT keys to increase or
decrease the PICTURE value.
9. Press the MENU button on the remote control transmitter
twice to exit the user menu.
10. The new PERSONAL preference values are automatically
stored.
White line around picture elements and text
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 (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys to select SHARPNESS.
6. Press the MENU LEFT key to decrease the SHARPNESS
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.
Snowy picture
To enter CSM, press the following key sequence on the remote
control transmitter: '
123654' (do not allow the display to time
out between entries while keying the sequence).
Check CSM line 5. If this line reads 'Not Tuned,' check the
following:
•
Antenna not connected. Connect the antenna.
• No antenna signal or bad antenna signal. Connect a proper
antenna signal.
• The tuner is faulty (in this case line 6, the Error Buffer line,
will contain error number 10). Check the tuner and replace/
repair the tuner if necessary.
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 (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys to select COLOR.
6. Press the MENU RIGHT key to increase the COLOR 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 (if necessary).
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 of the European DST (special remote control
transmitter for Service), which allows faster and more accurate
diagnostics. ComPair has three big advantages:
•
ComPair helps you to 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 L01.1U AC chassis,
schematics and CBAs are only a mouse-click away.
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