Recapped: refurbished with new High Quality Panasonic Capacitor, read more below

IMPORTANT WARNING!

In January of 2017, Roland Japan released a press release notifying users of SR-JV80 expansion boards to return their boards to Roland due to a risk of the smoking the electrolytic capacitor. This can lead to a catastrophic failure of the board, which can damage the synthesizer.

"To Expansion Board SR-JV80 Series Customers -  Published January 27, 2017
Thank you very much for your patronage of our products on a daily basis.
The Expansion Board SR-JV80 series has been in production for more than 20 years since the initial production, electrolyte in use may rarely leak due to aged deterioration of the electrolytic capacitor used.  If electrolyte leaks out, in the worst case there is a risk of smoking.
Customers who are currently using the SR-JV80 series with sound module or synthesizer should stop using them immediately.
If you continue to use this SR-JV80 series in the future, please consult the Roland customer consultation center.

Actually it's a very rare occurrance, but I can replace the capacitor with a new Hi Quality Panasonic one. You can stay safe for the next 25 years at least.

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The JV-80 and JV-880 only had room for one expansion board, but since the cards were successful, Roland started adding room for more than just only one - case in point, when they produced the incredibly successful module JV-1080 (that was considered and still is, an "industry standard for ROMplers"), they offered room for four expansion boards.  Just a few years later, Roland offered eight slots in their JV-2080, the successor to the 1080.

The Pop board is often underestimated because, being the first offered, contains waveforms that were added in the standard ROM of the instruments that followed, and people who own later models such as JV-1080, XP-80 and JV-2080 don't think they need "more of the same" bread and butter sounds: but even if that's the case, this board contains certain waves and patches that are not available anywhere else.

"Pop" is the name of this wave expansion board, and certainly it does a good job of providing all the staple instruments used in pop, such as pianos, bass, organs, saxophones, choirs and strings.  It's also noteworthy the addition of a few waveforms in D-50 style, brief attack of very characteristic sounds, such as breathy flutes, pads, even PWM waveforms - from which to start molding your sounds.

Even though this board doesn't receive the acclaim of other more famous boards in this series - i.e., the Session, Orchestral, Vintage or '60s & '70s, it still is a valid tool for any musician who owns one of the JV/XP series of instruments.

Stream all the audio examples below