Philips L01.1A, Service Manual

Service Modes, Error Codes and Fault Finding

GB 24

L01.1A

5.

Snowy picture

Check CSM line 5. If this line indicates ‘Not Tuned’, check the 
following:
•

No or bad antenna signal. Connect a proper antenna 
signal.

•

Antenna not connected. Connect the antenna.

•

No channel / pre-set is stored at this program number. 
Go to the INSTALL menu and store a proper channel at 
this program number.

•

The tuner is faulty (in this case the CODES line will 
contain error number 10). Check the tuner and replace / 
repair if necessary.

Snowy picture and/or unstable picture

•

A scrambled or decoded signal is received.

Black and white picture

Increase the COLOR value when:
•

The picture improves after you have pressed the ‘Smart 
Picture’ button on the remote control. 

•

The picture improves after you have switched on the 
Customer Service Mode

The new ‘Personal’ preference value is automatically stored.

Menu text not sharp enough

Decrease the CONTRAST value when:
•

The picture improves after you have pressed the ‘Smart 
Picture’ button on the remote control. 

•

The picture improves after you have switched on the 
Customer Service Mode

The new ‘Personal’ preference value is automatically stored.

5.3.2

Sound Problems

No sound or sound too loud (after channel change / 
switching on)

Increase / decrease the VOLUME level when the volume is 
OK after you switched on the CSM. 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 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

2

C level) 

and is therefore capable of accurately indicating problem 
areas. You do not have to know anything about I

2

C 

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 L01 chassis, the ComPair interface box and the 
TV communicate via a bi-directional service cable via the 

service connector (located on the Main panel, see also figure 
8-1 suffix D).
 
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

2

C level. 

ComPair can access the I

2

C bus of the television. 

ComPair can send and receive I

2

C 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 I

2

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 
extend. When this is not the case, ComPair will guide you 
through the faultfinding tree by asking you questions 
(e.g. Does the screen gives 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 (European) 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

How to Connect

1. First install the ComPair Browser software (see the Quick 

Reference Card for installation instructions).

2. Connect the RS232 interface cable between a free serial 

(COM) port of your PC and the PC connector (marked 
with ‘PC’) of the ComPair interface.

3. Connect the AC power adapter to the supply connector 

(marked with ‘POWER 9V DC’) on the ComPair 
interface.

4. Switch the ComPair interface OFF.
5. Switch the television set OFF (remove the AC power).
6. Connect the ComPair interface cable between the 

connector on the rear side of the ComPair interface 
(marked with ‘I

2

C’) and the ComPair connector on the 

mono carrier (see figure 8-1 suffix D).

7. Plug the AC power adapter in the AC power outlet and 

switch on the interface. The green and red LEDs light up 
together. The red LED extinguishes after approx. 1 
second while the green LED remains lit.

8. Start the ComPair program and read the ‘introduction’ 

chapter.