Yamaha system 37 38 guitar preamp service manual

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GUITAR ACOUSTY
(SYSTEM 37/ SYSTEM 38)

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their serVice personnel It has been
assumed that ba5ic service procedures inherent to the industry, and more specmcally 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 expenswe components and failure of the product to perform as
specified, For these reasons. we advise all Yamaha product owners that all sewice requued
should be performed by an authorized Yamaha Retailer or the appomted 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

The data provided is believed to be accurate and applicable to the unitls) indicated on the cover The research,
engineering, and seNice departments of Yamaha are continually strivmg to improve Yamaha products Modifications
are, therefore, inevitable and changes in specification are subiect to change without notice or obligation to retrofit
Should any discrepancy appear to exist, please contact the distributor's Sewice DIVISIOn

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

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

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, ELECTRlCAL/ELECTRONlC OR PLASTlC 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 vaporl

if you come in contact With solder or components located in5ide the enclosure of this product, wash your hands be-
fore handling food