Yamaha tx7 Service Manual page 2

TX7
SPECIFICATIONS
SoundSource
Simultaneous
Ouput Notes ....
Internal
Memory
Control Panel
Display
Connection Terminals
Power Requirements
. .
Power Consumption
. .
Dimensions
(WxHxD)
Weight
FM
Tone Generator
(6
Operators}
Polyphonic; 16 (first note priority)
Monophonic:
1
(last
note priority)
32
PERFORMANCES
(32
VOICES +
32
FUNCTIONS),
32
DX FUNCTIONS
PRESET VOLUME
(4)
PROGRAM
CHANGE/CASSETTE
(2)
STORE/MIDI
(2)
FUNCTION
(1)
NORMAL/SHIFT
(1)
DATA ENTRY
(2)
LCD
<16 characters x
1
line)
MIDI
IN
(DIN JACK
SP)
MIDI
OUT
(DIN JACK 5P)
MIDI
THRU
(DIN JACK
5P)
CASSETTE
(DIN
JACK 8P)
OUTPUT (PHONE JACK MONO)
HEAD PHONE (PHONE JACK STEREO)
US
&
Canadian models:
1
20V 50/60HZ
General
model: 220-240
V
50/60HZ
US
&
Canad
Ian models
:
1
2W
General model;
10W
351 x 50 x 241
mm
113-5/6" x
2" x 9-1/2")
2.3 kg
(5 lbs.
1
oz.)
*
All specifications are subject to change without notice.
.
—
-N
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 inherant 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 personal 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
j
appointed
service representative.
IMPORTANT:
The
presentation or
sale
of
this
manual
to
any
individual or firm does not
constitute
authorization, certification, recognition of any
applicable technical
capabilities, or
|
establish a principle-agent relationship
of any form,
;
j
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 buss
in the unit (heavy
gauge
black wires connect
to this buss).
IMPORTANT:
Turn
the unit OFF
during disassembly and
parts replacement. Recheck
ail
work
before
you apply power
to the unit.
,
HOW
TO USE
THE TX7
1.
What
is
the
TX7?
The
TX7
is
a
tone generator
module that
can be controlled
by
MIDI
signals
from the
DX
series,
QX1
,
CX5
etc. It is
the equivalent of the
DX7
tone generating section.
When
connected to
a
DX7
or
DX9,
it
can
act as a
function
memory
for the
DX7
or
DX9, and
thus allow you to create
sounds just like a
DX1
.
[Features]
•
FM
tone
generation system.
• 16 note polyphonic.
• Internal
memory: 32 voice data,
32 function data,
stored
in pairs.
Each voice
memory
has
its
own
function
memory.
•
Individual
volume and high
and low note limits
can be
set for
each
voice
memory.
Also,
independently of the
voice
memory, two volumes
may be preset, and recalled
instantly
by
a
front panel switch. This can be used for
muting.
•
Besides the
TX7's
own
32 voice
memories and 32 func-
tion
memories,
it
will store
32 function
memories for
the
DX7. This can be used
as
an extended function
memory
for the
DX7.
2
.
Memory
diagram
and flowchart of the
TX7
The
internal
memory
structure
is
shown below.
I
FM TONE
1
GENERATOR
j
J
IT
T—
"1 PERFORMANCE
jCTST 1
|EDt7
buffe*} |edit
Buffer}—.. 1
2
VOICE
MEMORY
32
1
"
i
LOAD
9 1
2
TX
FUNCTION MEMORY
32
STORE
0
1
2
DX FUNCTION
MEMORY 32
Diagram
1
The
internal
memory
is
as follows.
;
Voice edit buffer
Function
edit
buffer
32 voice memories
32 function
memories
32
DX
function
memories
Volume, master tune
The
voice
and function data of the selected
memory
number
is
loaded into
the voice and function buffers.
Then, the voice
and function data
is
loaded into
the
FM
tone generator,
and
it is
ready to
produce sound.
All editing of voice
and function data
is
done on the data
in
the buffers.
When
the store
command
is
executed, the data in
the
buffers
is
stored into the
respective memories.
The data
in
the function edit
buffer
will
be stored into
the
memory
that
you
designate.
3.
How
the switches
work
There are four
kinds of switches
on
the
from
panel of the
TX7.
0
Switches to enter
volume
and data,
0
Switches
that have different
operations
when
in
normal
or shift
mode,
®
Selector switch normat/shift
mode,
0
Switches
to
set
function data.
The operation
of
switches types
0
^
0
is
shown below.
Diagram 2
NORMAL
MODE: Program change
mode
Store
mode
Function
mode
SH
I
FT
MODE
:
Cassette
mode
MIDI
mode
Function
mode
When changing
from program change
or store
modes
to
cassette or
MIDI modes, press
MODE
switch to change to
SHIFT mode. Then press the cassette or
MIDI
switch.
When changing the other
way back
to
program change
or
store
modes,
press
MODE
switch again
to change to
NORMAL
mode. Then press the
program change or store
mode
switch.
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1
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2
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TX7