How to enter the Oki printer menu? How to print an Oki test page?

How to enter the Oki printer menu? How to print an Oki test page?

How to enter the Oki dot matrix printer's menu?
How to get a test page from an Oki dot matrix printer?

OKİ ML1120eco
OKİ ML280eco
OKİ ML320
OKİ ML321
OKİ ML420
OKİ ML421
OKİ ML620
OKİ ML621
OKİ ML186
OKİ ML3320
OKİ ML3321
OKİ ML5521eco
OKİ ML5720
OKİ ML3410
OKİ ML5520
OKİ ML5721
OKİ ML3390eco
OKİ ML3391eco
OKİ ML395
OKİ ML5590eco
OKİ ML5591eco
OKİ ML5790eco
OKİ ML5791eco
OKİ ML390
OKİ ML391
OKİ ML395
OKİ ML490
OKİ ML491
OKİ ML690
OKİ ML691

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