Yamaha M-70 Power Amplifier Repair And Restoration Yamaha M-70 Repair And Restoration. This Yamaha M-70 Power Amplifier is in need of some service. I have removed the top cover of this Yamaha M-70. The amplifier is constructed well. I'll remove the faceplate for cleaning. After removing six screws you need to unsnap the power lamp from the faceplate. yamaha m-70 | eBay Find great deals on eBay for yamaha m-70. Shop with confidence. Skip to main content. eBay Logo: Yamaha C80 Preamp M70 Power Amp Pair Working Audiophile amplifier MC phono See more like this. Yamaha MX-M70 Amplifier Service / Repair Manual Schematics - Factory Original. $29. or Best Offer +$3 shipping.
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