Yamaha CS80 Service Manual, from Yamaha. Many pages full of detailed  schematics and service information on this very deep and very Iconic analog polyphonic synthesizer. Vintage and original. Will be fully insured.

NOTE: Please email me with All Questions Prior To Bidding. Items sold as used and as is. It is your responsibility to ask all questions prior to bidding and to read the business terms and details of this auction prior to bidding. Your bid is your acknowledgement that you have read these auction terms and agree with them. Exchanges or refunds can be provided in case of shipping damage. Buyer must notify me and return the item within 10 days of receiving the damaged item. 

PLEASE READ THE BUSINESS DETAILS: Payment must be made the day of purchase. Non-Paying bidders will be reported to Ebay. Please no bids from those with feedback scores less than 96% or zero feedback. However you can contact me via email for possible approval. Shipping time can be from 3-6 business days via the US Postal Service (or FedEx, UPS) and is usually put in the mail within 2-3 business days due to new eb policies which delay the deposit of payment. If you have any questions or issues after you receive the item please contact me before leaving feedback. I aim to please and make this a great transaction for both of us. I reserve the right to end the auction early. 

ONLY USA BIDDERS, NO INTERNATIONAL SHIPPING, NO ZERO FEEDBACK BIDDERS, NO PO BOXES.