Sony TRINITRON KV-PF21DK7 Service Manual page 7

4. SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as "power sometimes shuts off" or "screen sometimes goes out" that cannot be confirmed, it
is possible to bring up past occurances of failure for confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
[Screen display] / channel [5] / Sound volume [-] / Power ON
Self-Diagnosis screen display
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
during repairs. When you have completed the repairs, clear the result display to "0".
Unless the result display is cleared to "0", the self-diagnostic function will not be able to detect subsequent faults after
completion of the repairs.
[Clearing the result display]
To clear the result display to "0", press buttons on the remote commander sequentially as shown below when the diagnostic
screen is being displayed.
Channel [8] / 0
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
˘
Note that this differs from entering the service mode (mode volume [+]).
Numeral "0" means that no fault has been detected.
Numeral "1" means a fault has been detected.
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KV-PF21N70/PF51P40/PF21P70/PF21Q40
RM-915 RM-952
KV-PF21Q70/PF21M70/PF21DK7
RM-952 RM-952
RM-952 RM-952
RM-952