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Yamaha Original Service Manual Sheet for the HPE-6 Headphones.
This is a good to very good condition vintage original Yamaha service manual for the Yamaha HPE6 Headphones. This service manual is very brief, 2 pages, 1 page front and back, and has specs, overall assembly and parts list.
This is a nice vintage sheet from Yamaha, printed in Japan, from 1991. It would be very useful if you have a set of these great headphones to repair, and it's a nice collectable as well! I have 2 of them available at this time, both in similar condition.