“Error in CPU data transmission" on Technics KN1600

Aug 3, 2016
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Hi there,

I have a problem with a Technics sx-KN1600 that I wondered if you could help me with. We’ve powered up a Technics sx-KN1600 after replacing some keys & we’re now getting the message “Error in CPU data transmission." & the keyboard won't come on. The keyboard worked perfectly well before we started the job. However we thought we’d a screw trapped under the main board so we removed the main board & the power amplifier board to check but couldn’t find the screw so I think it had dropped out earlier. Obviously we had to unplug many connections to remove the boards, but we’ve double-checked all the connections now we’ve put the boards back & everything looks fine. We've tested the capacitor that looks after the memory backup & that was okay as was holding a charge & we've done a continuity test on the ribbon cables & that's come out positive also. So we don't know what else to try. Can you give us any advice?

Mr Brett Hollingworth
Octaves Yamaha Music Point
81 Bridge Street
West Midlands
01922 613058
07769 518540


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