Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model number of the TEAC.
Appreciate the additional information.
The error code indicates an internal hardware issue.
Are you then considering a DIY (do-it-yourself) repair of the TEAC GF-350? If yes, do you have access to and familiar with a multi-meter and even a soldering iron?