Philips Colour Television Specifications download pdf (Page 23)

Service Modes, Error Codes and Fault Finding

GB 23EM3E 5.

5. Service Modes, Error Codes and Fault Finding

Index of this chapter:

1. Test points.

2. Service Modes.

3. Problems and solving tips (related to CSM).

4. ComPair.

5. Error buffer.

6. The blinking LED procedure.

7. Protections.

8. Repair tips.

5.1 Test Points

The chassis is equipped with test points printed on the circuit

board assemblies. They refer to the diagram letters. The

numbering is in a logical sequence for diagnostics. Always

start diagnosing (within a functional block), in the sequence

of the relevant test points for that block.

Measurements are performed under the following conditions:

• Service Default Mode.

• Video: colour bar signal.

• Audio: 3 kHz left, 1 kHz right.

5.2 Service Modes

Service Default Mode (SDM) and Service Alignment Mode

(SAM) offer several features for the service technician, while

the Customer Service Menu (CSM) is used for

communication between dealer and customer.

5.2.1 Service Default Mode (SDM)

Purpose

• To create a pre-defined setting, to get the same

measurement results as given in this manual.

• To override SW protections.

• To start the blinking LED procedure.

Specifications

• Tuning frequency: 475.25 MHz for PAL/SECAM.

• Colour system: SECAM L for France or PAL B/G for the

rest of Europe.

• All picture settings at 50 % (brightness, colour, contrast).

• All sound settings at 50 %, except volume at 25 %.

• All service-unfriendly modes (if present) are disabled,

like:

– (sleep) timer,

– child/parental lock,

– blue mute,

– automatic volume limiter (AVL),

– auto switch-off (when no ‘IDENT’ video signal was

received for 10 minutes),

– skip/blank of non-favorite pre-sets,

– smart modes,

– auto store of personal presets,

– auto user menu time-out.

How to enter SDM

Use one of the following methods:

• Via a standard customer RC-transmitter : key in the code

‘062596’ followed by the ‘MENU’ button (it is possible

that, together with the SDM, the main menu will appear.

To switch it off, push the ‘MENU’ button again).

• When you press the ‘DEFAULT’ button on the Dealer

Service Tool (DST or RC7150) while the set is in the

normal operation mode.

• When you shorten for a moment

(*)

the two solder pads

on the ‘external part’ of the SSB print (see Figure 7 in

Chapter 4), with the indication SDM (item 4006).

Activation can be performed in all modes, except when

the set has a problem with the main-processor.

• Via ComPair.

*Caution:If the SDM is entered via the pins, all the software-

controlled protections are de-activated.

After entering SDM, the following screen will be shown, with

‘Service Default’ at the lower right side for recognition.

Figure 5-1

How to navigate

When you press the ‘MENU’ button on the RC transmitter,

the set will toggle between the SDM and the normal user

menu (with the SDM mode still active in the background).

How to exit SDM

Use one of the following methods:

• Switch the set to STANDBY (

) via the RC-transmitter,

• Press the ‘EXIT’ button on the DST.

5.2.2 Service Alignment Mode (SAM)

Purpose

• To perform alignments.

• To change option settings.

• To display/clear the error code buffer.

Specifications

• Operation hours counter.

• Software version.

• Option settings.

• Error buffer reading and erasing.

• Software alignments.

How to enter SAM

Use one of the following methods:

• Via a standard RC transmitter: key in the code ‘062596’

directly followed by the OSD [i+] button, or

• When you press the ALIGN button on the DST while the

set is in the normal operation mode, or

• When you shorten for a moment

(*)

the two solder pads

on the ‘external part’ of the SSB print (see Figure 7 in

Chapter 4), with the indication SAM (item 4005).

Activation can be performed in all modes, except when

the set has a problem with the main-processor.

• Via ComPair.

*Caution:If the SAM is entered via the pins, all the software

controlled protections are de-activated.

The following screen will be shown, with SAM at the upper

right side for recognition.

Se r v i ce De f au l t

CL 16532044_031.eps

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Philips Colour Television Specifications Page 23

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