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HQRP AC Adapter / Power Supply for Yamaha PSR-280 / PSR280 / PSR-290 / PSR290 Keyboards Replacement plus HQRP Coaster, 600 related issues. ... is there an internal battery to protect memory and if so, do i need to replace it? yes there ...HQRP AC Adapter / Power Supply for Yamaha DGX-620 / DGX620 / DGX- ...
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HQRP AC Adapter / Power Supply for Yamaha PSR-280 / PSR280 / PSR-290 / PSR290 Keyboards Replacement plus HQRP Coaster, adapter related ... need a new one, you could try to get a replacement from casio or try to get an ... It MAY appear to operate on DC BUT it can't generate the +/- voltages internally for sound .
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There is no fuse inside SP250. If the unit can't power ON,there maybe damage to the adapter,adapter cord/connector,or broken fuse inside the adapter.
If adapter is in good condition, then the damage is inside SP250.
The possibilities are on regulator section.
Check all parts in this section (figure 1).
Also maybe there is a broken soldering joints at DC input socket.
Some Casio Keyboards use 9V DC (center negative) others 12V DC (center negative).
If check what voltage your Keyboard use. Generic AC adapters are usually center positive. So you have to invert the wire with a new DC plug to make it center negative,
Easiest is to buy a Casio ac adapter made for your keyboard from a Casio retailer.
Check your power adapter. This unit REQUIRES a 9 volt AC adapter, NOT a DC one... It MAY appear to operate on DC BUT it can't generate the +/- voltages internally for sound generation with a DC adapter. This is a common problem as people try to run these on a DC adapter.
It sounds like the new board and firmware has gone to abbreviations instead of fully spelling it out.
I would complain to the store since they should warrant it if it is a problem... but be prepared to accept that the firmware has been changed and displays differently now.
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