Service Alignment Mode [SAM] _ Error Codes [LED blinking codes] _ Power supply troubleshooting Tips _ PHILIPS 23PF9946/79 _ PHILIPS 223PF9946/98 _ LCD TV
SERVICE MODE [Service Alignment Mode - SAM]
To enter SAM, use one of the following methods:
* Press the following key sequence on the remote control transmitter: “062596" directly followed by the OSD/STATUS button (do not allow the display to time out between entries while keying the sequence)
After entering SAM, the following screen is visible, with SAM in the upper right corner of the screen to indicate that the television is in Service Alignment Mode.
MENU EXPLANATION
1 LLLLL. This represents the run timer. The run timer counts normal operation hours, but does not count standby hours.
2AAABCD-X.Y/EEEEEE F.GG This is the software identification of the main microprocessor:
> A= the project name (LC42).
> B= the region: E= Europe, A= Asia Pacific, U= NAFTA,L= LATAM.
> C= the software diversity:
* Europe: T= 1 page TXT, F= Full TXT, V= Voice control.
* LATAM and NAFTA: N= Stereo non-dBx, S=Stereo dBx.
* Asian Pacific: T= TXT, N= non-TXT, C= NTSC.
* ALL regions: M= mono, D= DVD, Q= Mk2.
> D= the language cluster number.
> X= the main software version number (updated with a major change that is incompatible with previous versions).
> Y= the sub software version number (updated with a minor change that is compatible with previous versions).
> EEEEEE= the scaler sw cluster
> F= the main sw version no.
> GG= the sub-version no
3 SAM. Indication of the Service Alignment Mode.
4 Error Buffer. Shows all errors detected since the last time the buffer was erased. Five errors possible.
5 Option Bytes. Used to set the option bytes. See “Options” in the Alignments section for a detailed description. Seven codes are possible.
6 Clear. Erases the contents of the error buffer. Select the CLEAR menu item and press the MENU RIGHT key. The content of the error buffer is cleared.
7 Options. Used to set the option bits. See “Options” in the Alignments section for a detailed description.
8 Tuner. Used to align the tuner. See “Tuner” in the Alignments section for a detailed description.
9 White Tone. Used to align the white tone. See “White Tone” in the Alignments section for a detailed description.
10 Audio. No audio alignment is necessary for this television set.
11 NVM Editor. Can be used to change the NVM data in the television set.
12 . SC NVM Editor. Can be used to edit Scaler NVM.
13 ComPaIr. Can be used to switch on the television to In System Programming (ISP) mode, for software uploading via ComPair. Caution:When this mode is selected without ComPair connected, the TV will be blocked. Remove the AC power to reset the TV.
TO NAVIGATE
* In SAM, select menu items with the MENU UP/DOWN keys on the remote control transmitter. The selected item will be highlighted. When not all menu items fit on the screen, use the MENU UP/DOWN keys to display the next / previous menu items.
* With the MENU LEFT/RIGHT keys, it is possible to:
> Activate the selected menu item.
> Change the value of the selected menu item.
> Activate the selected submenu.
* In SAM, when you press the MENU button twice, the set will switch to the normal user menus (with the SAM mode still active in the background). To return to the SAM menu press the MENU or STATUS/EXIT button.
* When you press the MENU key in while in a submenu, you will return to the previous menu.
TO STORE SETTING
To store the settings changed in SAM mode, leave the top level SAM menu by using the POWER button on the remote control transmitter or the television set.
TO EXIT
Switch the set to STANDBY by pressing the power button on the remote control transmitter or press the 'POWER' switch on the set.
ERROR CODES
The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that is not yet in the error code buffer, it is displayed at the left side and all other errors shift one position to the right.
TO READ THE ERROR BUFFER
Can read the error buffer in 3 ways:
* On screen via the SAM (if you have a picture). Examples:
> ERROR: 0 0 0 0 0 : No errors detected
> ERROR: 6 0 0 0 0 : Error code 6 is the last and only detected error
> ERROR: 9 6 0 0 0 : Error code 6 was detected first and error code 9 is the last detected (newest) error
* Via the blinking LED procedure (when you have no picture)
TO CLEAR THE ERROR BUFFER
The error code buffer is cleared in the following cases:
* By using the CLEAR command in the SAM menu:
> To enter SAM, press the following key sequence on the remote control transmitter: “062596” directly followed by the OSD/STATUS button (do not allow the display to time out between entries while keying the sequence).
> Make sure the menu item CLEAR is highlighted. Use the MENU UP/DOWN buttons, if necessary.
> Press the MENU RIGHT button to clear the error buffer. The text on the right side of the “CLEAR” line will change from “CLEAR?” to “CLEARED”
* If the contents of the error buffer have not changed for 50 hours, the error buffer resets automatically.
Note: If you exit SAM by disconnecting the mains from the television set, the error buffer is not reset.
ERROR CODES
In case of non-intermittent faults, write down the errors present in the error buffer and clear the error buffer before you begin the repair. This ensures that old error codes are no longer present.
If possible, check the entire contents of the error buffer. In some situations, an error code is only the result of another error and not the actual cause of the problem (for example, a fault in the protection detection circuitry can also lead to a protection).
LED BLINKING PROCEDURE
Using this procedure, you can make the contents of the error buffer visible via the front LED. This is especially useful when there is no picture.
When the SDM is entered, the front LED will blink the contents of the error-buffer:
* The Led blinks 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 starts is repeated. Any RC5 command terminates this sequence.
Example of error buffer: 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 at 12 short blinks
POWER SUPPLY SECTION CIRCUIT REPAIR TIPS
This power supply contains three fuses. One is near the mains inlet (marked on the board as 1102) and two other are near the output connectors (marked 1610 and 1660).
1 Check with power supply in off state by means of Ohm measurement.
2 Fuse 1102 may open in case of severe lightning strikes and/or failures in the power supply. Despite the fact, that this fuse is mounted in a fuse holder and the marking text on the board, it is not meant to be field replaceable.
3 Fuses 1610 and 1660 may open in case a severe overload of the 12 V outputs. Replacement of the power supply is needed, but not before the cause of the overload conditions is resolved.
STANDBY MODE
1 Apply a 12 ohm load resistor of sufficient power rating to all outputs (+3 V3, +12 VAL, +12 VL and +24 V). Connect the STBY pin to GND.
2 Over an input voltage range of 90 VAC to 264 VAC only the +3 V3 output shall be up and within regulation (±5%). The voltage on the POWER DOWN pin shall be < 0.3 V at an input voltage below 160 VAC, and 3.3 V ±10% at an input voltage higher than 240 VAC.
NORMAL MODE
1 Apply a 12 ohm load resistor of sufficient power rating to all outputs (+3 V3, +12 VAL, +12 VL and +24 V). Connect the STBY pin to the +3V3 output.
2 Over an input voltage range of 90 V _ac to 264 VAC all outputs shall be up and within regulation (±5%). The voltage on the POWER DOWN pin shall be 3.3 V ±10% over the entire input voltage range. Additionally, the voltage on the big capacitor mounted flat on the PCB shall be 400 V ±10%.
