Specifications

PRECAUTIONS
NOTE: It is vital to read this section before using your SPX90 II Digital Multi-Effect Processor. This unit utilizes
state-of-the-art digital technology which, although designed to provide years of trouble-free use, required
careful handling.
VOLTAGE RATINGS
Be sure the AC supply in your area is appropriate
for your SPX90 II.
U.S./Canadian Model: 110V— 120V, 50/60Hz.
General Model: 220 — 240V, 50/60Hz.
ENVIRONMENTAL TEMPERATURE
Do not expose the SPX90 II to excessive heat. The
operating temperature range of this unit is between
0 and 40 degrees centigrade (32 and 104 degrees
Fahrenheit).
EXTERNAL CLEANING
Do not clean the exterior of the SPX90 II with
solvents such as benzine or paint thinner. Dust, dirt,
or fingermarks should simply be removed with a
soft, dry cloth. Internal cleaning of the unit should
only be performed by a qualified technician.
The LCD may not function properly under extreme
temperature conditions. It will return to normal after
cooling down to within the proper temperature
range.
BACKUP BATTERY
To ensure that User Programs are not lost when the
SPX90II’s power is turned off, a built-in
long-life
battery acts as a backup. In normal use, this bat-
tery lasts 5 years, but it is advisable to change the
battery before this time has elapsed. Contact your
local Yamaha dealer for details.
NOTE: When you change the battery, the User Pro-
grams may be lost. As a safeguard, take
note of all parameters of your User
Programs
in the USER PROGRAMMING TABLE accom-
panying this manual. The SPX90 II can then
be reprogrammed once a new battery is in-
stalled. The preset programs are permanent,
and will not be affected by a change of
battery.
ERROR MESSAGES
When power is initially turned ON an automatic cir-
cuit test program is executed to ensure proper
operation. If an error is encountered, one of the
following error messages will be displayed:
E0 : ROM checksum error.
E1: CPU RAM read/write error.
E2 : External RAM read/write error.
Make a note of the error message and inform the
service personnel when the unit is to be serviced.
FCC CERTIFICATION (USA)
This equipment generates and uses radio frequency
Reorient the receiving antenna.
energy and if not installed and used properly, that is, in
Relocate the computer with respect to the receiver.
strict accordance with the manufacturer’s instructions,
Move the computer away from the receiver.
may cause interference to radio and television reception.
Plug the computer into a different outlet so that
It has been type tested and found to comply with the
computer and receiver are on different branch circuits.
limits for a Class B computing device in accordance with If necessary, the user should consult the dealer or an
the specifications in Subpart J of Part 15 of FCC Rules, experienced radio/television technician for additional
which are designed to provide reasonable protection suggestions. The user may find the following booklet
against such interference in a residential installation. prepared by the Federal Communications Commission
However, there is no guarantee that interference will not helpful:
occur in a particular installation. If this equipment does
“ How to identify and Resolve Radio-TV interference
cause interference to radio or television reception, which
Problems”.
can be determined by turning the equipment-off and on,
This booklet is available from the U.S. Government
the user is encouraged to try to correct the interference
Printing Office, Washington, DC 20402, Stock
by one or more of the following measures:
No. 004-000-00345-4.
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