NOTE: It is vital to read this section before using your SPX90 Digital Multi-Effect Processor. This unit utilizes
state-of-the-art digital technology which, although designed to provide years of trouble-free use, requires
Be sure the AC supply in your area is appropriate
for your SPX90.
U.S./Canadian Model: 110V — 120V, 50/60Hz.
General Model: 220 — 240V, 50/60Hz.
Do not expose the SPX90 to excessive heat. The
operating temperature range of this unit is between
0 and 40 degrees centigrade (32 and 104 degrees
Do not clean the exterior of the SPX90 with solvents
such as benzine or paint thinner. Dust, dirt, or finger-
marks should simply be removed with a soft, dry
cloth. Internal cleaning of the unit should only be per-
formed 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
This equipment generates and uses radio frequency
energy and if not installed and used properly, that is, in
strict accordance with the manufacturer's instructions,
may cause interference to radio and television reception.
It has been type tested and found to comply with the
limits for a Class B computing device in accordance with
the specifications in Subpart J of Part 15 of FCC Rules,
which are designed to provide reasonable protection
against such interference in a residential installation.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause interference to radio or television reception, which
can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference
by one or more of the following measures:
To ensure that User Programs are not lost when the
SPX90's power is turned off, a built-in long-life bat-
tery acts as a backup. In normal use, this battery
lasts 5 years, but it is advisable to change the bat-
tery before this time has elapsed. Contact your local
Yamaha dealer for details.
NOTE: When you change the battery, the User Pro-
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:
Make a note of the error message and inform the
service personnel when the unit is to be serviced.
FCC CERTIFICATION (USA)
Reorient the receiving antenna.
Relocate the computer with respect to the receiver.
Move the computer away from the receiver.
Plug the computer into a different outlet so that
computer and receiver are on different branch circuits.
If necessary, the user should consult the dealer or an
experienced radio/television technician for additional
suggestions. The user may find the following booklet
prepared by the Federal Communications Commission
"How to identify and Resolve Radio-TV interference
This booklet is available from the U.S. Government
Printing Office, Washington, DC 20402, Stock
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 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
E0 : ROM checksum error.
E1 : CPU RAM read/write error.
E2 : External RAM read/write error.