Philips LCD TV – Customer service mode - Service alignment mde - LED blinking codes - Troubleshooting

Philips Chassis TCM 3.1A.  Toshiba model C910 LCD TV too uses this chassis. 

Applicable to Philips: 32HFL3331/93, 32HFL3331/97, 32PFL3409/93, 32PFL3409/98. 32PFL3609S/98, 42HFL3381/93, 42PFL3609/93, 42PFL3609/98, 42PFL3609S/98, 47PFL3609/93, 47PFL3609/98, 47PFL3609S/98

Service Default Mode (SDM)

Purpose
To start the blinking LED procedure where only layer 2 errors are displayed.

How to Activate the SDM
Use the standard RC-transmitter and key in the code “062596”, directly followed by the “MENU” (or HOME) button.
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 set will toggle between the SDM and the normal user menu (with the SDM mode still active in the background).

How to Exit SDM

Switch the set to STAND-BY via the RC-transmitter.

Service Alignment Mode (SAM)

Purpose
* 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 “i+/INFO” button.

How to Navigate
In SAM, the menu items can be selected with the “Arrow up/down” key on the RC-transmitter. The selected item will be highlighted. When not all menu items fit on the screen, move the “Arrow up/down” key to display the next/previous menu items.

* With the “Arrow Left/Right” keys, it is possible to:
– (De) activate the selected menu item.
– (De) activate the selected sub menu.
* With the “OK” key, it is possible to activate the selected action.
* With the “Menu/Home” key, it is possible to go back to the previous selection.

How to Exit SAM

Switch the set to STAND-BY via the RC-transmitter.

Fault Finding and Repair Tips

        No Picture, no sound, no Back light, Fuse Broken

                   No Picture, Back light & Sound OK

                            Picture okay, no sound.

                                     No colour.

Error Codes

The error code buffer contains all detected errors since the last time the buffer was erased. The buffer is written from top to bottom (or left to right), new errors are logged at the top/left side, and all other errors shift one position to the bottom/right.  When an error occurs, it is added to the list of errors, provided the list is not full. When the error buffer is full, then the new error is not added, and the error buffer stays intact (history is maintained).  To prevent that an occasional error stays in the list forever, the error is removed from the list after more than 50 hrs of operation.

There is a simple blinking LED procedure for board level repair (home repair) the so called LAYER 1 errors, next to the existing errors which are LAYER 2 errors:

* LAYER 1 errors are one digit errors

* LAYER 2 errors are two digit errors.

When is LAYER 1 or 2 available
In CSM mode: When entering CSM; error LAYER 1 will be displayed by blinking LED. Only the latest error is shown.
In SDM mode: When SDM is entered via Remote Control code, LAYER 2 is displayed via blinking LED.

Error display on screen
* In CSM, no error codes are displayed on screen.
* In SAM, the complete error list is shown.

If possible, check the entire contents of the error buffer. In some situations, an error code is only the result of another error code and not the actual cause (e.g. a fault in the protection detection circuitry can also lead to a protection).

In case of non-intermittent faults, clear the error buffer before starting to repair (before clearing the buffer, write down the content, as this history can give significant information). This to ensure that old error codes are no longer present.

How to Read the Error Buffer

Use one of the following methods
* On screen via SAM (only when a picture is visible). E.g.:
– 000 000 000 000 000: No errors detected
– 017 000 000 000 000: Error code 17 is the last and only detected error.
– 015 017 000 000 000: Error code 17 was first detected and error code 15 is the last detected error.
* Via the Blinking LED procedure.
* Via ComPair. (Computer interface)

How to Clear the Error Buffer

Use one of the following methods:

* By activation of the “Clear Codes” command in the SAM menu.

* With a normal RC, key in sequence “062599” followed by “OK”.

Take notice that some errors need several minutes before they start blinking or before they will be logged. So in case of problems wait 2 minutes from start-up onward, and then check if the front LED is blinking or if an error is logged.

The Blinking LED Procedure (LAYER-2 codes)

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 that 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 LED pulse with as many pulses as the error code number, followed by a time period of 1.5 seconds in which the LED is “off”. Then this sequence is repeated.

For example: An 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 RC command terminates this sequence.

Displaying the entire error buffer
The entire error buffer can be displayed when service mode “SDM” is entered (by remote control command 062596 <MENU>).

When in protection, this sequence will not work, but then LAYER-1 error code should suffice.

In order to avoid confusion with RC signal reception blinking, this blinking procedure is terminated when a RC command is received.