GE27GT630 - HOW TO ENTER SERVICE MODE - ADJUSTMENTS - ERROR CODES

TO ENTER SERVICE MODE

The following adjustment procedures are accessed by a service menu.

• To access the service menu, turn the receiver on, press the menu button and hold it down while pressing the power button.
• While holding down the menu button, release the power button and press the volume + button.
• The screen will display a one line menu, on the left the parameter P0, and on the right the value of that parameter V0. Release buttons. Selecting the proper parameter and changing the value of that parameter make adjustments.
• To change the parameter number use channel up and down buttons.
• To adjust the current value of that parameter use volume + and - buttons.
• To access and change any of the adjustments, the proper parameter pass number must be entered.  
• When these parameters are modified, the T-Chip and the corresponding EEPROM are updated. All service adjustments are bus controlled, except focus and screen.

NOTE: In order to adjust the RF AGC, audio or video levels, tuner, PIP, or stereo circuits, the Chipper Check hardware and software must be used. This can be purchased from Thomson Electronics. Before making any changes to any of the values, record the On Set values.

ADJUSTMENT PARAMETERS

ERROR CODES

• If certain failures occur, the matching error codes will be stored in the EEPROM. These error codes will be displayed in parameters 1, 2, and 3. 
• The first failure error code will be stored at parameter 1 and the second failure error code will be stored at parameter 2. 
• Parameter 3 will be updated to display the most recent failure occurred in the chassis. If a failure of a bus IC occurred, the normal acknowledgment checking of that bus will be disabled in the service mode and the address of that IC which failed will be stored in one of the error code parameters. 
• After every repair is done to the chassis it is recommended to check the error code parameters, and reset them back to value 0.

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