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5.
•
V-Chip Tv Status. Indicates the setting of the V-chip as
applied by the selected TV channel. Same values can be
shown as for "TV RATINGS LOCK".
•
V-Chip Movie Status. Indicates the setting of the V-chip
as applied by the selected TV channel. Same values can
be shown as for "MOVIE RATINGS LOCK".
•
Options 1. Gives the option codes of option group 1 as set
in SAM (Service Alignment Mode).
•
Options 2. Gives the option codes of option group 2 as set
in SAM (Service Alignment Mode).
•
AVL. Indicates the last status of AVL (Automatic Volume
Level): "ON" or "OFF". Change via "MENU", "TV",
"SOUND", "AVL". AVL can not be set in case of digital
audio reception (e.g. Dolby Digital or AC3)
•
Delta Volume. Indicates the last status of the delta volume
for the selected preset as set by the customer: from "-12"
to "+12". Change via "MENU", "TV", "SOUND", "DELTA
VOLUME".
•
HDMI key validity. Indicates the key's validity.
•
IEEE key validity. Indicates the key's validity (n.a.).
•
POD key validity. Indicates the key's validity (n.a.).
•
Digital Signal Quality. Indicates quality of the received
digital signal (0= low).
How to Exit CSM
Press any key on the RC-transmitter (with exception of the
"CHANNEL +/-", "VOLUME", "MUTE" and digit (0-9) keys).
5.3
Service Tools
5.3.1
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:
1. 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.
2. 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.
3. 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 CBAs 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 RS-232) 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:
•
Automatically (by communicating 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
the microcontroller of the television. In this way, it is
possible for ComPair to communicate (read and write) to
2
devices on the I
C/UART buses of the TV-set.
EBJ1.0U
Service Modes, Error Codes, and Fault Finding
2
C level) and
2
C commands
2
C/UART level.
2
C/UART bus of the television.
2
C/UART commands to
•
Manually (by asking questions to you): Automatic
diagnosis is only possible if the microcontroller of the
television is working correctly and only to a certain extent.
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.
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.
How To Connect
This is described in the chassis fault finding database in
ComPair.
Caution: It is compulsory to connect the TV to the PC as
shown in the picture below (with the ComPair interface in
between), as the ComPair interface acts as a level shifter. If
one connects the TV directly to the PC (via UART), ICs will be
blown!
Figure 5-4 ComPair interface connection
How To Order
ComPair order codes:
•
ComPair Software: ST4191.
•
ComPair Interface Box: 4822 727 21631.
•
AC Adapter: T405-ND.
•
ComPair Quick Start Guide: ST4190.
•
ComPair interface extension cable: 3139 131 03791.
•
ComPair UART interface cable: 3122 785 90630.
Note: If you encounter any problems, contact your local
support desk.
5.4
Error Codes
5.4.1
Introduction
The error code buffer contains all detected errors since the last
time the buffer was erased. The buffer is written from left to
right, new errors are logged at the left side, and all other errors
shift one position to the right.
When an error has occurred, the error is added to the list of
errors, provided the list is not full or the error is a protection
error.
When an error occurs and the error buffer is full, then the new
error is not added, and the error buffer stays intact (history is
maintained), except when the error is a protection error.
To prevent that an occasional error stays in the list forever, the
error is removed from the list after 50+ operation hours.
When multiple errors occur (errors occurred within a short time
span), there is a high probability that there is some relation
between them.
TO
TO
I 2 C SERVICE
UART SERVICE
CONNECTOR
CONNECTOR
I 2 C
PC
VCR
Power
9V DC
E_06532_021.eps
180804
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