Korg PA50 Service Manual page 52

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Please press [F1] to start Internal Test.
If (8) -> (9) are displayed after (6), Test Mode is not loaded correctly. Please turn off and restart from first
step.
(8)
<How to operation>
SW
LCD
FUNCTION
[F1]
GO
Start Test Mode
[F2]
Rpt
Repeat Inspection
[F3]
Next
Go to Next Inspection
[F4]
Skip
Skip Inspection
In the interval of each inspection, press key; -> *** is displayed on LCD (*** name of Inspection)
Press [F2] : you can do the last inspection you just completed again.
Press [F3] : You can go to next inspection displayed on LCD (***)
<CAUTION>
If you press [F3] while press key; -> *** is displayed on LCD, Test Mode go to next inspection irrespective
of success or failure of inspection you just finished. So, please confirm if the last inspection is successful
and then press [F3] and go to next inspection.
3.
INTERNAL INSPECTION
Internal Inspection inspects following contents
When NG is found, FAULT!!! is displayed on LCD.
NAND CHECK
TGL Check
TGL Dram Check
TGL ROM Check
Floppy Disk Check
MIDI Loop Check
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