Yamaha mw12 usb mixing studio service manual

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USB MIXING STUDIO

MWIE

SERVICE MANUAL

I CONTENTS (E 2k)

SPECIFICATIONS (figémsfi) .............................................. 3/5
DIMENSIONS HE.) ...................... 7
PANEL LAYOUT (ARM/17H; I) ....8
CIRCUIT BOARD LAYOUT (11v I~ 1/1 7 7 I~> ............... 12
RACK MOUNTING (3v77rby I~) ................................... 12
WIRING (IT-51$.) ....................................... .. 13
DISASSEMBLY PROCEDURE (Mfima) _. 14
LSI PIN DESCRIPTION (LSIfi¥+¥EEiE) ..... .. 18
IC BLOCK DIAGRAM (IC 7I:1y 7|) ................................. 1s
CIRCUIT BOARDS (9- 1mm ...................................... 19
INSPECTIONS (Tag) ...................................................... 27/38

BLOCK DIAGRAM & LEVEL DIAGRAM

(71:17 '7 & I/Nwsfr 775A)
OVERALL CIRCUIT DIAGRAM (fiéfiflél)
PARTS LIST

.YAMAHA

PA 011815 HAMAMATSU, JAPAN

20060225- 71 7 7 / 75 1 2 COpyrighI (e) Yamaha Corporation. AII rights reserved. PDF In (D 06.02

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MW12

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 per-
sonal 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: This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.

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 bus in the unit (heavy gauge black wires connect to
this bus.)

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, 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.

IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord

IMPORTANT: The wires in this mains lead are coloured in accordance with the following code:
BLUE : NEUTRAL
BROWN : LIVE

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals in
your plug proceed as follows:

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.
Making sure that neither core is connected to the earth terminal of the three pin plug.

- This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (2 wires).

I WARNING

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

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