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Sony RA-3B Service Manual Page 7

Color rear video projector.
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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
SELF DIAGNOSIS
2: +B OCP
000
3: +B OVP
000
4: VSTOP
000
5: AKB
000
101: WDT
000
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.
Method of Clearing Results Display
1. Power off (Set to the stanby mode.)
2. Display
Channel 5
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.
_
Sound Volume*
Power ON
*Note that this differs from entering the service mode (sound volume + )
2: +B OCP 000
000 the range of values for number of
operations is 000-225.
Diagnosis
For 256 or higher, the number remains
Results
at 255.
Sound Volume +
Power ON (Service Mode)
— 7 —
KP- 43T90 / 48V90 / 53V90 / 61V90

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