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Service Modes, fault finding and repair tips
Text "CSM" on the first line
•
Line number for every line (to make CSM language
independent)
•
Operating hours
•
Software version L90BBC X.Y)
•
Text "CSM" on the first line
•
Error buffer contents
•
Option code information
•
Configuration information
•
Service unfriendly modes
1 HHHH L90BBC-X.Y
2 CODES xx xx xx xx xx
3 OP xxx xxx xxx xxx xxx xxx xxx
4 SYS: xxxxxxxxxxx
5 NOT TUNED
6 TIMER
7 LOCKED
8 (HOSPITAL) (HOTEL)
9 VOL LIM <value>
Figure 5-5 Screen lay-out Customer Service Mode
SYS: xxxxxx = xxxxxx is the SYSTEM THAT IS SET FOR THIS
PRESET
NOT TUNED = no ident signal present
TIMER = (SLEEP) TIMER is actived
LOCKED = Channel/preset locked via parental lock, child lock
HOTEL = HOTEL mode activated; HOSPITAL = HOSPITAL
mode activated
VOL LIM = Volume limiter activated and set to the adjusted
value
5.6.5
Exit
Any key (RC or local keyboard) except "channel up" / "channel
down" (standby switched to standby, mains OFF switches set
off, other keys switch to normal operation)
5.7
ComPair
5.7.1
Introduction
Compair (Computer Aided Repair) is a service tool for Philips
Consumer Electronics products. ComPair is a further
development on the DST service remote control allowing faster
and more accurate diagnostics. ComPair has three big
advantages:
•
ComPair helps you to quickly get an understanding how to
repair the L9.2E in short time by guiding you step by step
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; Compair takes care of this.
•
ComPair speeds up the repair time since it can
automatically communicate with the L9.2E (when the micro
processor is working) and all repair information is directly
available. When ComPair is installed together with the
SearchMan L9.2E electronic manual, schematics and
PCBs are only a mouse-click away.
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. In case of the L9.2E chassis, the ComPair
interface box and the L9 communicate via an I2C cable (bi-
directional) and via infra red communication (uni-directional;
from ComPair interface box to L9.2E)
CSM
CL 86532104_014.eps
080299
L9.2E
The ComPair fault finding program is able to determine the
problem of the defective television. ComPair can gather
diagnostic information in 2 ways:
1. Communication to the television (automatic)
2. Asking questions to you (manually)
ComPair combines this information with the repair information
in its database to find out how to repair the L9.2E.
Automatic information gathering
Reading out the error buffer, ComPair can automatically read
out the contents of the entire error buffer.
Diagnosis on I2C level. ComPair can access the I2C bus of the
television. ComPair can send and receive I2C commands to
the micro controller of the television. In this way it is possible for
ComPair to communicate (read and write) to devices on the
I2C busses of the L9.2E.
Manual information gathering
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 and showing you
examples. You can answer by clicking on a link (e.g. text or an
waveform pictures) that will bring you to the next step in the
faultfinding process.
A question could be: Do you see snow? (Click on the correct
answer)
YES / NO
An example can be: Measure testpoint I7 and click on the
correct oscillogram you see on the oscilloscope
Figure 5-6
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.
Additional features
Beside fault finding, ComPair provides some additional
features like:
•
Uploading/downloading of presets
•
Managing of preset lists
•
Emulation of the Dealer Service Tool
5.7.2
SearchMan (Electronic Service Manual)
If both ComPair and SearchMan are installed, all the
Schematics and PCBs of the faulty set are available when
clicking on the hyper-link of a schematic or a PCB in ComPair
Example: Measure the DC-voltage on capacitor C2568 (
Schematic/Panel ) at the Monocarrier.
Clicking on the PCB hyper-link, automatically shows the PCB
with a high-lighted capacitor C2568. Clicking on the schematic
hyper-link, automatically shows the position of a high-lighted
capacitor at the schematic.
5.7.3
Connecting the ComPair interface
The ComPair Browser software should be installed and setup
before connecting ComPair to the L9.2E. (See the ComPair
Browser Quick Reference Card for installation instructions.)
5.
GB 13
I7 B7502
1V / div DC
10µs / div
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