Philips DPTV465 Service Manual page 14

EN 14 5. DPTV465
5.3
Problems and Solving Tips (related to CSM)
Note: Below described problems are all related to the TV
settings. The procedures to change the value (or status) of the
different settings are described above. New value(s) are
automatically stored.
5.3.1
Picture Problems
Snowy/noisy picture
1. Check line 24 'Noise Figure'. In case the value is 127 or
higher, and the value is high on other programs, check the
aerial cable/aerial system.
2. Check lines 11 'Sharpness' and 24 'Noise Figure'. In case
the value of line 11 is 3 or 4 and the value of line 24 is high
(127 or higher), decrease the 'Sharpness' value.
Picture too dark
1. Press 'Smart Picture' button on the RC-transmitter. In case
the picture improves, increase the 'Brightness' or the
'Contrast' value. The new value(s) are automatically stored
(in 'personal' pre-set) for all TV channels.
2. Check line 7 'Brightness' and 8 'Contrast'. If the value of
line 7 is low (< 10) or the value of line 8 is low (< 10),
increase the 'Brightness' or the 'Contrast' value.
Picture too bright
1. Press 'Smart Picture' button on the RC-transmitter. In case
the picture improves, decrease the 'Brightness' or the
'Contrast' value. The new value(s) are automatically stored
(in 'personal' pre-set) for all TV channels.
2. Check lines 7 'Brightness' and 6 'Contrast'. If the value of
line 7 is high (> 40) or the value of line 8 is high (> 50).
Decrease the 'Brightness' value or increase the 'Contrast'
value.
White line around picture elements and text
1. Press 'Smart Picture' button on the Remote Control. In
case the picture improves, decrease the 'Sharpness' value.
The new value is automatically stored (in "personal" pre-
set) for all TV channels.
2. Check line 11 'Sharpness'. Decrease the 'Sharpness'
value. The new value is automatically stored for all TV
channels.
No picture
Check line 27 'Tuned bit'. In case the value is 'On', install the
required program again. Open the installation menu and
perform manual installation.
Blue picture
No proper signal is received. Check the aerial cable/aerial
system.
Blue picture and/or unstable picture
A scrambled or decoded signal is received.
Black and white picture
Check line 9 'Colour'. In case the value is low (< 10), increase
the 'Colour' value. The new value is automatically stored for all
TV channels.
No colours/colour lines around picture elements or
colours not correct or unstable picture
Check line 20 'TV System'. If a "strange" system pops up,
something has gone wrong during installation. Re-install the
channel.
Menu text not sharp enough
1. Press 'Smart Picture' button on the RC-transmitter. In case
picture improves, decrease the contrast value. The new
value(s) are automatically stored for all TV channels.
Service Modes, Error Codes, and Fault Finding
5.3.2
5.4
5.4.1
5.4.2
2. Check line 8 'Contrast'. The value of line 8 is high (> 50).
Decrease the contrast value.
Sound Problems
No sound from left and right speaker
Check line 6 'Volume'. The value is low. Increase the value of
'Volume'. The new value(s) are automatically stored (in
"personal" pre-set) for all TV channels.
Sound too loud for left and right speaker
Check line 6 'Volume'. The value is high. Decrease the value of
'LS Volume'. The new value(s) are automatically stored (in
"personal" pre-set) for all TV channels.
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 I
is therefore capable of accurately indicating problem areas.
You do not have to know anything about I
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/SearchMan electronic manual of the defective
chassis, schematics and PWBs are only a mouse click
away.
Specifications
ComPair consists of a Windows based fault finding 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(s).
The ComPair fault finding 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
access the I C/UART bus of the television. ComPair can
2
send and receive I C/UART commands to the micro
controller of the television. In this way, it is possible for
ComPair to communicate (read and write) to devices on
2
the I C/UART 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 extend.
When this is not the case, ComPair will guide you through
the fault finding 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 fault finding process.
2
C level) and
2
C commands
2
C/UART level. ComPair can