2
MSR250 Owner’s Manual 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the instructions contained in
this manual, meets FCC requirements. Modifications not expressly
approved by Yamaha may void your authority, granted by the FCC, to
use the product.
2. IMPORTANT:
When connecting this product to accessories and/or
another product use only high quality shielded cables. Cable/s supplied
with this product MUST be used. Follow all installation instructions. Fail-
ure to follow instructions could void your FCC authorization to use this
product in the USA.
3. NOTE:
This product has been tested and found to comply with the
requirements listed in FCC Regulations, Part 15 for Class “B” digital
devices. Compliance with these requirements provides a reasonable
level of assurance that your use of this product in a residential environ-
ment will not result in harmful interference with other electronic devices.
This equipment generates/uses radio frequencies and, if not installed
and used according to the instructions found in the users manual, may
cause interference harmful to the operation of other electronic devices.
Compliance with FCC regulations does not guarantee that interference
* This applies only to products distributed by YAMAHA CORPORATION OF AMERICA. (class B)
will not occur in all installations. If this product is found to be the source
of interference, which can be determined by turning the unit “OFF” and
“ON”, please try to eliminate the problem by using one of the following
measures:
Relocate either this product or the device that is being affected by the
interference.
Utilize power outlets that are on different branch (circuit breaker or fuse)
circuits or install AC line filter/s.
In the case of radio or TV interference, relocate/reorient the antenna. If
the antenna lead-in is 300 ohm ribbon lead, change the lead-in to co-
axial type cable.
If these corrective measures do not produce satisfactory results, please
contact the local retailer authorized to distribute this type of product. If
you can not locate the appropriate retailer, please contact Yamaha Cor-
poration of America, Electronic Service Division, 6600 Orangethorpe
Ave, Buena Park, CA90620
The above statements apply ONLY to those products distributed by
Yamaha Corporation of America or its subsidiaries.

FCC INFORMATION (U.S.A.)

IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING:
THIS APPARATUS MUST BE EARTHED
IMPORTANT. The wires in this mains lead are coloured in accordance with the following code:
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug
proceed as follows:
The wire which is coloured GREEN-and-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth
symbol or colored GREEN or GREEN-and-YELLOW.
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.
• This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (3 wires)
The above warning is located on the bottom and rear of the unit.

Explanation of Graphical Symbols

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. IMPORTANT SAFETY INSTRUCTIONS
1 Read these instructions.
2Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with dry cloth.
7Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8 Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9 Do not defeat the safety purpose of the polarized or grounding-type
plug. A polarized plug has two blades with one wider than the other.
A grounding type plug has two blades and a third grounding prong.
The wide blade or the third prong are provided for your safety. If the
provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10 Protect the power cord from being walked on or pinched particularly
at plugs, convenience receptacles, and the point where they exit
from the apparatus.
11 Only use attachments/accessories specified by the manufacturer.
12 Use only with the cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to
avoid injury from tip-over.
13 Unplug this apparatus during lightning storms
or when unused for long periods of time.
14 Refer all servicing to qualified service
personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged,
liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
(UL60065_03)
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.