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Unstable picture
Check lines 17 'Colour System' and 18 'TV System'. In case
line 17 is 'SECAM' and line 18 is 'M 38,9', the installed
system for this pre-set is 'West Europe', while 'France' is
required. Install the required program again: open the
installation menu by pressing 'timer' and 'enlarge' at the
same time and perform manual installation. Select 'System;
France'.
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.
2. Check line 7 'LS Contrast'. The value of line 7 is high (>
50). Decrease the contrast value.
5.3.2
Sound Problems
No sound from left and right speaker
1. Check line 4 'LS 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
1. Check line 4 'LS 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.
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
and is therefore capable of accurately indicating problem
areas. You do not have to know anything about I
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.
In case of the EM3E 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
ComPair can access the I
ComPair can send and receive I
micro controller of the television. In this way, it is possible
Service Modes, Error Codes and Fault Finding
2
C level)
2
C
2
C level.
2
C bus of the television.
2
C commands to the
EM3E
for ComPair to communicate (read and write) to devices
2
on the I
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 Monocarrier. 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
Stepwise Start Up / Shut Down
Under normal circumstances, a fault in the power supply, or
an error during start-up, will switch the television to protection
mode. ComPair can take over the initialisation of the
television. In this way it is possible to distinguish which part
of the start-up routine (hence which circuitry) is causing the
problem.
Stepwise start up explanation
This is realised via ComPair and is very helpful when a
protection is activated (see also chapter 5.7).
State
Description mode
Low power stdby:
0
5V2/3V3 present, uP
in stdby-mode
1
High power Stdby:
TV-set in stdby-
mode
2
SSB is powered by
stdby-supply
(5V/8V). Degaussing
(12 s) has been
activated.
Semi stdby-mode:
3
HIP, HOP, MSP and
Tuner initialized
leading to semi
stdby-mode.
4
All ICs are
initialized, HOP
activates the main
supply, EHT-
generation starts,
black current
stabilization is on
5
TV On: TV-set
operates, un-
blanked picture.
Figure 5-6
5.
GB 27
Display
Enabled
LED (Red)
protection
On
None
Wait 1s,
None
flash 1 x
Wait 1s,
4 & 5
flash 2 x
Wait 1s,
Plus 1, 6 & 18
flash 3 x
Wait 1s,
Plus 2 & 16
flash 4 x
Wait 1s,
flash 5 x
CL 16432044_036.eps
140501
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