This Philco TV [b] 21ms6 whose chassis is the CM-530 has no service mode to adjust the parameters ... But for me when it says
"MENU" refers to the menu key to be able to enter the user settings, this TV has individual keys irrigated by the remote control for each function that you want to adjust accessible to the user, for this you need the original TV remote control; Anyway you can get it in the electronics stores, to the copy of the original, it is much better than buying a UNIVERSAL ...

In the photo I wrote MC530 but it is CM-530 ... My apologies for the case. Thanks]