Wednesday, August 15, 2012

AIWA - TV SX2950 SERVICE MODE




TO ENTER SERVICE MODE

To enter service mode, a modification should be done with its remote control [RC-6VT06]

This is the remote control:
There is a 'Test' key (hidden) just above the 'System' key, a blank space in between two keys, just right of "0" key.  An other one is on the left side of 'system' key.  Might have to peel off the emblem of the remote control to access these keys.  These keys are used for adjusting parameters with Service Mode adjustments only.

STARTING THE SERVICE MODE

  • Press the "Test"(Hidden)  key once to enter to the Aging Mode.
AGING MODE WINDOW
==================================
                               AGING
            AFT                ****
            HEX               ****
            DOWN              **
=================================
  • Press the "Channel" key on the remote control to enter into the adjustment mode.
Hidden Key / "Finish"
  • The accumulated hours in the 'Aging Mode' will be reset by presetting the "Finish" key.
  • Avoid pressing this key during general repairs.
  1. Enter to Aging Mode by pressing the "Test" key on the remote control.
  2. Press the "System' key and confirm the condition of the distinction switch.

  • In case, the contents are different, press '4' key and select [INDO2] for destination. See the display.
-----------------------------------------------------------------------
             1   KE1                          5  SH1
             2   KE2                          6  SH2
             3   INDO1                     7  SH3
             4  IND 02                      8  SH4

                       0123456789ABCDEF
                       0101100011110111
                       1111111111111111
                       0123456789ABCDEF
                       1011001010111100
-----------------------------------------------------------------------
  • In case the data is different, use "Channel" key to scroll  through (0 to 1F), and set to the correct data value of "0" or "1" by the Volume key.
  • All the settings are stored when the "Test" key is pressed to complete the correction.  There will not be a problem even though these changes are done after completing all adjustments.
CONTENTS OF AGING MODE
  1. Release "auto power off" function:  Release auto power off function, when no input is supplied.  Use this mode for warming up, during CRT adjustment.
  2. AFT S-Curve status indication:  The condition of AFT S-curve are indicated by "IN" for suitable tuning, "High" for too high or "Low" for too low.  "Out" is indicated when no signal is applied.
  3. Display of 'CRT ON' accumulated hours:  The CRT used time is accumulated on an hourly basis is displayed in hexadecimal figures. [1*16*16*16 - 4th digit] [ 2*16*16 - 3rd digit] [ 3*16 - 2nd digit] [4*16 - first digit].  
  4. The display will be reset to '0000H' when the accumulated hours exceed '7FFFH'(32768) hours.
ADJUSTMENT MODE OPERATION
  • Return to the aging display by pressing the "Test" key and press "Channel" key to display the adjustment menu screen.