Yamaha mt400 cassette recorder service manual

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MULTITRACK CASSE'I'I'E RECORDER

/l/l7'400

SERVICE MANUAL

I C ONTE NTS

SPECIFICATIONS
DIMENSIONS

PANEL LAYOUT
CIRCUIT BOARD LAYOUT ................. 8
BLOCK DIAGRAM ............................ 9
DISASSEM BLY PROCEDURE ............................ 10
IC BLOCK DIAGRAM ..
CIRCUIT BOARDS
INSPECTIONS
TROUBLE SHOOTING
CIRCUIT DIAGRAM
PARTS LIST

.YAMAHA

PA 011437 HAMAMATSU, J APAN

19981101-45000 1.9519998 [Dgfi Printed in] apan 98.10

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MT4m

IMPORTANT NOTICE

This manual has been provided for the use ol 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 under
stood 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 per
sonal injury, destruction of expensive components and tailure 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 Fletailer or the appointed service representative.

IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization CerIIIl'
cation, recognition of any applicable technical capabilities, or establish a principalragent relationship of
any lorm.

The data provided is belived 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 you 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 fl during disassembly and parts replacement. Flecheck L work before you apply power
to the unit.

WARNING: CHE MICAL CONTE NT 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 lound 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 OH PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT
SO EVEFl!

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

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

IWARNING

Components having special characteristics are marked A and must be replaced with parts having specification equal to those
originally installed.