KP-43T90, KP-48V90, KP-53V90, KP-61V90 - Sony TV Service Manual (repair manual). Page 7

Self-diagnosis screen displays
In cases of malfunctions where it is not possible to determine the symptom such as when the power goes off occasionally or when the screen 
disappears occasionally, there is a screen display on whether the malfunction occurred or not in the past (and whether the detection circuit operated 
or not) in order to allow confi rmation.

      
Screen Display Method
Quickly press the remote command button in the following order from the standby state.

  Display  

  Channel  5   

  Sound Volume* 

_

  

  Power ON 

 

 

 

 

 

*Note that this differs from entering the service mode (sound volume  +  )

Self-Diagnosis Screen Display
The results display is not automatically cleared.  In case of repairs and after repairs, check the self-diagnosis screen and be sure to 
return the results display to “ 0 ”. 

If the results display is not returned to “ 0 ” it will not be possible to judge a new malfunction after completing repairs.

1. Power off (Set to the stanby mode.)

2.   Display  

  Channel  5   

  Sound Volume  +   

  Power ON (Service Mode) 

3.  Channel  8   

   ENTER  (Test reset = Factory preset condition)

Method of Ending Self Diagnosis Screen
When ending the self-diagnosis screen completely, turn the power switch OFF on the remote commander or the main unit.

2:  +B  OCP  000

Results

Diagnosis

000 the range of values for number of 
operations is 000-225.
For 256 or higher, the number remains 
at 255.