Pioneer, known for its audio equipment as well as car electronics systems, said Baring Private Equity Asia has agreed on a 102-billion-yen ($904 million) plan to revive the struggling Tokyo-based company.
Baring will make a 77-billion-yen investment in Pioneer, along with a 25-billion-yen offer to buy existing shares from shareholders.
"These steps will secure working capital vital for Pioneer's business operations," a joint statement from the two firms said.
"Once privatised, a range of significant changes will be made to revitalise Pioneer, including reviews of the company's business lines as well as structural reforms and an overhaul of the management team," it said.
The deal is subject to approvals from Pioneer shareholders as well as regulatory agencies.
It was among the leading companies to promote laser discs and plasma televisions.
But Pioneer has struggled in recent years with deep losses and falling sales as the audio and automobile industries go through rapid changes.
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