via this auction
"Overhauled.The built-in battery is a socket type and the keyboard contacts are carbon processed.
Accessories: genuine hard case
Details of repair:
・Repair of broken CPU, board, and IC wiring pattern
・Socket Corrosion Replacement/Base Cleaning
・RAM IX current excessive replacement/capacitor replacement
・Built-in battery degraded replacement + socket installation * Improved built-in battery leakage, which is a weak point of POLY SIX, and replaced with socket type for easy replacement by customers (CR -2032)
Replace the POLY SIX with the power turned on.
・Right panel base break repair
・OSC SW disconnection repair
・RAM IC disconnection repair
・keyboard contact carbon treatment
・replacement of all switches
・Timbre Initialization Program Load * This is the default timbre."
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