My Aiwa cx-nma545 keeps turning off.

See the guide below:

Manuals Lib has the manual here: https://www.manualslib.com/products/Aiwa-Sx-Wna555-159268.html . You can download it or read it online. The speaker system has the model number SX-WNA555. The main part of the stereo system has the model number CX-NMA545.

I hope this helps.

Cindy Wells

http://m.ebay.com/itm/AIWA-RC-ZAS05-AUDIO-SYSTEM-REMOTE-CONTROL-CXNHMA86-CXNHMA86U-CXNHMT75-/331729077190

Remote is no longer available from Aiwa nor most remote resellers. Ebay is your only source. The above link is to one available currently on ebay usa

Sorry but the control board is shot that's why there inexpensive to purchase they only last for 3 to 5 years

Check with AIWA they might be able to supply the Operating instructions free. Some have them as a PDF on the website.

The original remote is needed to get into the main menu, try www.aiwa.com contact customer support, also! go to www.ebay.com type make and model of unit and go through the list you might get lucky.

hello this is the manuals for it and please rate my comment http://www.retrevo.com/samples/Aiwa-manuals.html

On most TV's with speaker control there's a way to disable the TV's volume control effect on the level fed out to an external amplifier. Find it and disable it it or select FIXED for its level, or, while listening through the Aiwa, raise the TV's volume through its own remote and see if that affects what the Aiwa gets for volume.

Or, enable the TV's speakers but find the same interna lAudio setting and make it Fixed, but turn the TV volume down if you don't want to hear its speakers. That way, you could actually listen to the TV on its own speakers if you want, say, for casual watching of the Weather Channel or news, for example.

Are you looking for instruction manual of Aiwa CX-NMA545
If yes, click Aiwa Support to download instruction manual of NSX-MA545 (CX-NMA545)

Download User Manual for Aiwa NSX-AJ50 Hi-Fi system.
Sony owned Aiwa few years back and you can see NSX-AJ50 page on Sony Support.
If you have Aiwa part Query, please contact nearest Sony Service center.