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Service Modes, Error Codes and Fault Finding EN 25 EM5E 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 Codes
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.
Perform measurements 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 Mode (CSM) is used for communication
between a Philips Customer Care Centre (P3C) and a
customer.
There is also the option of using ComPair, a hardware interface
between a computer (see requirements below) and the TV
chassis. It offers the ability of structured troubleshooting, test
pattern generation, error code reading, software version
readout, and software upgrading.
Minimum requirements: a Pentium processor, Windows 95/
98, and a CD-ROM drive (see also paragraph 5.4).
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 video signal was received for
10 minutes).
– Skip/blank of non-favourite pre-sets.
– Smart modes.
– Auto store of personal presets.
– Auto user menu time-out.
How to enter SDM
Use one of the following methods:
•
Use the standard RC-transmitter and key in the code
'062596', directly followed by the ‘MENU’ button.
Note: It is possible that, together with the SDM, the main
menu will appear. To switch it off, push the ‘MENU’ button
again.
• When you shorten for a moment the two solder pads on the
'external part' of the SSB print, with the indication SDM.
Activation can be performed in all modes, except when the
set has a problem with the main-processor. Caution: If the
SDM is entered via the pins, all the software-controlled
protections are de-activated.
• Use the DST-emulation feature of ComPair.
• Use the ‘DEFAULT’ button on the Dealer Service Tool
(RC7150).
After entering this mode, 'SDM' will appear in the upper right
corner of the screen.
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.
• Via a standard customer RC-transmitter: key in '00'-
sequence.
5.2.2 Service Alignment Mode (SAM)
Purpose
•
To perform (software) alignments.
• To change option settings.
• To easily identify the used software version.
• To view operational hours.
• To display (or 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
• Short for a moment the two solder pads on the 'external
part' of the SSB print, with the indication SAM.
• Use the DST-emulation feature of ComPair.
• Press the ALIGN button on the DST while the set is in the
normal operation
After entering this mode, 'SAM' will appear in the upper right
corner of the screen.
Contents of SAM:
•
Rom Version. Displays the date of the software and the
software version of the ROM
(example: EM5EU1-1.0_01234= AAABBC-X.Y_NNNNN).
–
AAA= the chassis name (EM5).
– BB= the region: EU= Europe, AP= Asia Pacific PAL/
Multi, AN= Asia Pacific NTSC, US= USA, LT= LATAM.
– C= the language cluster number.
– X.Y= the software version, where X is the main version
number (different numbers are not compatible with one
another) and Y is the sub version number (a higher
number is always compatible with a lower number).
– NNNNN= last five digits of 12nc code software.