Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 11 (click to view)
PLAMENICI PLOCE Skinite držace za posude i plamenike. Odvrnite 2 vijka na prednjoj strani ploce i maknite ih. Zamijenite plamenike. Odvrnite vijak za podešavanje zraka. Pomaknite podešenje za zrak nadolje za smanjenje zraka, prema gore za povecanje, kako bi se postiglo pravilno podešavanje plamenika. - Zavrnite ucvršceni vijak.
ucvršceni vijak
podešenje za zrak
PLAMENICI PECNICE - Maknite dno pecnice. - Odvrnite ucvršceni vijak podešenja za zrak. - Pomaknite podešenje za zrak prema naprijed za smanjenje zraka ili prema nazad za povecanje, kako bi se postiglo pravilno podešavanje plamenika. - Zavrnite ucvršceni vijak.