Yamaha fx770 guitar effects processor service manual

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FX77O

FX77O

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel, it has been assumed that
basic service procedures inherent to the industry. and more specifically Yamaha Products, are already known and understood by the
users, and have therefore not been restated

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal
injury, destruction of expensive components and failure of the product to perform as specified For these
reasons, we advise all Yamaha product owners that all service required should be performed by an authorized
Yamaha Retailer or the appointed service representative.

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification,
recognition of any applicable technical capabilities. or establish a principalvagent relationship of any form. a

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and
service departments of Yamaha are continually striving to improve Yamaha products, Modifications are, therefore, inevitable and
changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please
contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components Discharge any static electricity your body may have )
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this . ;
buss), M

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the
unit.

This product uses a lithium battery for memory back»up.

WARNING: Lithium batteries are dangerous because they can be exploded by improper handling Observe the following
precautions when handling or replacing lithium batteries

Leave battery replacement to qualified service personnel. , ,
Always replace with batteries of the same type. .W
When installing on the PC board, solder using the connection terminals provided on the battery cells.
Never solder directly to the cells. Perform the soldering as quickly as possible,

Never reverse the battery polarities when installing

Do not short the batteries

Do not attempt to recharge these batteries.

Do not disassemble the batteries.

Never heat batteries or throw them into fire.

ADVARS EL!
Lithiumbatteri. Eksplosionsfare.
Udskiflning ma kun foretages af en sagkyndig, og som beskrevet i servicemanualen,

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD, In addition, other electrical/electronic and/or plastic (where .
applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other
entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR -
ANY REASON WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to
solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

ITO SERVICE PERSONNEL

Critical Components Information. App 033115;: 53 £3} {a 3%??? g, mm L. Egtfiggfi-To
1 Components having special characteristics are marked A fiifii 6 172% (1 ggo) 7: y) Mfféimfififi': é, Cfififi

and must be replaced with parts having specifications

equal to those originally installed. TE h"