Tuesday, April 07, 2015





Test Points
In the chassis schematics and layout overviews, the test points are mentioned. In the schematics, test points are indicated with “Fxxx” or “Ixxx”, in the layout overviews with a “half-moon” sign. As most signals are digital, it will be difficult to measure waveforms with a standard oscilloscope. Several key ICs are capable of generating test patterns, which can be controlled via ComPair. In this way it is possible to determine which part is defective.
Perform measurements under the following conditions:
• Service Default Mode.
• Video: Color bar signal.
• Audio: 3 kHz left,
1 kHz right.
Service Modes
The Service Mode feature is split into four parts:
• Service Default Mode (SDM).
• Service Alignment Mode (SAM).
• Customer Service Mode (CSM).
• Computer Aided Repair Mode (ComPair). SDM and SAM offer features, which can be used by the Service engineer to repair/align a TV set. Some features are:
• A pre-defined situation to ensure measurements can be made under uniform conditions (SDM).
• Activates the blinking LED procedure for error identification when no picture is available (SDM).
• The possibility to overrule software protections when SDM is entered via the Service pins.
• Make alignments (e.g. White Tone), (de)select options, enter options codes, reset the error buffer (SAM).
• Display information (“SDM” or “SAM” indication in upper right corner of screen, error buffer, software version, operating hours, options and option codes, sub menus). The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call centre. In CSM mode, “CSM”, is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to:
• Increase the home repair hit rate.
• Decrease the number of nuisance calls.
• Solved customers' problem without home visit. ComPair Mode is used for communication between a computer and a TV on I2C /UART level and can be used by a Service engineer to quickly diagnose the TV set by reading out error codes, read and write in NVMs, communicate with ICs and the uP (PWM, registers, etc.), and by making use of a fault finding database. It will also be possible to up and download the software of the TV set via I2C with help of ComPair. To do this, ComPair has to be connected to the TV set via the compare connector, which will be accessible through the rear of the set (without removing the rear cover).
Service Default Mode (SDM)
Set the TV in SDM mode in order to be able to:
• Create a pre-defined setting for measurements to be made.
• Override software protections.
• Start the blinking LED procedure.
• Read the error buffer.
• Check the life timer.
How to Activate SDM
For this chassis there are two kinds of SDM: an analog SDM and a digital SDM. Tuning will happen
• Analog SDM: use the standard RC-transmitter and key in the code “062596”, directly followed by the “MENU” (or HOME) button.
Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” (or HOME) button again.
• Digital SDM: use the standard RC-transmitter and key in the code “062593”, directly followed by the “MENU” (or HOME) button.
Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” (or HOME) button again.
• Analog SDM can also be activated by grounding for a moment the solder pad on the SSB, with the indication “SDM”.
After activating this mode, “SDM” will appear in the upper right corner of the screen (when a picture is available).
How to Navigate
When the “MENU” (or HOME) button is pressed on the RC transmitter, the TV set will toggle between the SDM and the normal user menu.
How to Exit SDM
Use one of the following methods:
• Switch the set to STAND-BY via the RC-transmitter.
• Via a standard customer RC-transmitter: key in “00”- sequence.
Service Alignment Mode (SAM)
• To perform (software) alignments.
• To change option settings.
• To easily identify the used software version.
• To view operation hours.
• To display (or clear) the error code buffer.
How to Activate SAM 
Via a standard RC transmitter: Key in the code “062596” directly followed by the “INFO” button. After activating SAM with this method a service warning will appear on the screen, continue by pressing the “OK” button on the RC.
The Blinking LED Procedure
The software is capable of identifying different kinds of errors. Because it is possible that more than one error can occur over time, an error buffer is available, which is capable of storing the last five errors that occurred. This is useful if the OSD is not working properly.
Errors can also be displayed by the blinking LED procedure. The method is to repeatedly let the front LED pulse with as many pulses as the error code number, followed by a period of 1.5 seconds in which the LED is “off”. Then this sequence is repeated.
Example (1): error code 4 will result in four times the sequence LED “on” for 0.25 seconds / LED “off” for 0.25 seconds. After this sequence, the LED will be “off” for 1.5 seconds. Any RC5 command terminates the sequence. Error code LED blinking is in red color.
Example (2): the content of the error buffer is “12 9 6 0 0
After entering SDM, the following occurs:
• 1 long blink of 5 seconds to start the sequence,
• 12 short blinks followed by a pause of 1.5 seconds,
• 9 short blinks followed by a pause of 1.5 seconds,
• 6 short blinks followed by a pause of 1.5 seconds,
• 1 long blink of 1.5 seconds to finish the sequence,
• The sequence starts again with 12 short blinks.
Displaying the Entire Error Buffer
Additionally, the entire error buffer is displayed when Service Mode “SDM” is entered. In case the TV set is in protection or Stand-by: The blinking LED procedure sequence (as in SDMmode in normal operation) must be triggered by the following RC sequence: “MUTE” “062500” “OK
Fault Finding and Repair Tips
• It is assumed that the components are mounted correctly with correct values and no bad solder joints.
Before any fault finding actions, check if the correct options are set.
Software Upgrading
It is possible for the user to upgrade the main software via the USB port. This allows replacement of a software image in a stand alone set, without the need of an E-JTAG debugger. A description on how to upgrade the main software can be found in the DFU.
Important: When the NAND-Flash must be replaced, a new SSB must be ordered, due to the presence of the security keys! (copy protection keys, MAC address, ...). Perform the following actions after SSB replacement:
1. Set the correct option codes (see sticker inside the TV).
2. Update the TV software => see the DFU for instructions.
3. Perform the alignments as described in chapter 6.
4. Check in CSM if the HDMI key, MAC address.. are valid.
 For the correct order number of a new SSB, always refer to the Spare Parts list on the Philips Service web portal!
Software Upgrade
SW versions can be divided in three types:
• SW that can not crash the working of the set.
– EDID NVM. If the download fails, the set is still running and the download can start again.
– Main NVM: If the download fails the default NVM value can be loaded. NVM can be loaded via USB, be aware PCBA alignments stored in NVM will not be overridden.
• SW that is “fool proof”: There is a backup version, a main interruption during upgrade shall not crash the normal working, a new upgrade can be started.
– Main SW image: Upgradable via USB.
– Standby SW.
– ARM Ambilight (if applicable): Upgradable via USB.
• SW that is not “fool proof”.
– Bootloader: Upgradable via USB in SAM (Note: must be done by service personnel). SW for all model numbers is loaded to the Philips Service portal (P4S) and contains the following software:
• Process_NVM_LC09Mxxx.bin: mainly for factory use to load main NVM. Can be used by service if applicable.
• LC09M_VGAxxxx.bin: for loading VGA NVM using ComPair tool.
• LC09M_HDMIxxxx.bin: for loading HDMI NVM via ComPair (HDMI MUX EDID) tool.
• The Autorun.upg file, which is available on P4C (the consumer web site), contains:
– Main SW.
– Standby SW.
– Bootloader SW (via SAM upgradable).
– Ambilight SW (if applicable