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AY-5-2376 の電気的特性と機能

AY-5-2376のメーカーはSwtpcです、この部品の機能は「Keyboard and Encoder」です。


製品の詳細 ( Datasheet PDF )

部品番号 AY-5-2376
部品説明 Keyboard and Encoder
メーカ Swtpc
ロゴ Swtpc ロゴ 




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AY-5-2376 Datasheet, AY-5-2376 PDF,ピン配置, 機能
www.DataSheet4U.com
KEYBOARD
and
ENCODER
219 W. Rhapsody, San Antonio, Texas 78216
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AY-5-2376 pdf, ピン配列
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www.DataSheet4U.com
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Install integrated circuits IC2-IC3 on the board, Be sure to orient the
IC's as shown on the board and do not bend the leads on the back side of
the board. Doing so makes it very difficult to remove the IC should
replacement ever be necessary. Do not install IC1 at this time. Solder.
Install the transistor and diodes on the board. Leave about 1/4" clearance
between the transistor body and the circuit board. Be sure to orient the
components exactly as shown on the component side of the board. Solder.
Check the key switches with an ohmmeter before they are installed to be
sure that they are making contact properly and to be sure that they do not
stick. Solder the switches in place one at a time using as little heat as
necessary to get a good solder joint. Note that the keyswitches for the
RCVE/XMIT and ECHO positions are a SPST switch and are different from the
rest. The switches can be recognized by pressing each keyswitch. The SPST
switches will have a locking position. Install these two switches first.
Be careful not to force any switch into a hole in such a way as to damage
the connecting wires. Excessive heating can distort, or even melt the
plastic body and ruin the keyswitch. Check the switch again with an
ohmmeter for proper operation after soldering it in place. This can save
much troubleshooting later. If the switch works properly heat stake the
switch in place by melting over the ends of the plastic mounting bosses.
This can be done with the tip of your soldering iron.
After all keyswitches have been installed and checked you are ready to
install the programming strips on the bottom of the board. These strips
mount vertically, at right angles to the main board. The etched finger,
connection points on the programming strips will match the connection pads
on the main board when the strips are in the correct position. Hold one of
the strips in the correct position and turn it so that the connection
fingers match the pads on both sides of the strip. Note that there are two
ways the strip may be turned and only one is correct. If the strips edge
is too rough to fit down solidly against the main board, file, or sand
that edge flat. Hold, or clamp sides of the strip to the main board, pads.
Install the other strip in the same way. Both strips are identical.
The spacebar and equalizer assembly goes together as follows. Mount a
keyswitch on the board in the center of the spacebar area. Mount the two
"L" shaped brackets with a notch in the top on each side of the keyswitch
in the holes provided. The side of the bracket with the notch should be
next to the circuit board edge. These should be fixed in place by melting
and flattening slightly the plastic pins on the back of the board with
your soldering iron tip. Press one of the equalizer wire retainers into
place on the end of the spacebar itself. The hole for the wire should be
on the more slanted side of the spacebar that has the four casting bumps.
Slip the equalizer wire into the hole in, the retainer you have not yet
pressed into place. Press the second retainer into place. Turn the
spacebar upside down in front of the board and press the equalizer wire
into the notches in the top of the mounting clips. Turn the spacebar over
and position it over the keyswitch in the center of the board. Press it
down into place.
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AY-5-2376 電子部品, 半導体
In Case of Problems
The tests called for in the check-out procedure are designed to warn you
of problems before they can cause damage. If any abnormal results are obtained
during the tests, or if there is obvious overheating of any part discontinue use
until the problem is located and corrected. Experience has shown that most
problems are caused by minor wiring, component installation and soldering
technique errors which can be prevented by careful assembly.
If you do have problems with your keyboard there are several tests you can
perform which may help you locate the problem. You will need an ohmmeter, an
oscilloscope, and a DC voltmeter for these tests. First go back and check once
more for proper component installation and for solder bridges or cold solder
www.DataSheet4U.cjoomints. Also be sure that the correct jumpers are in place. Next check each
keyswitch with an ohmmeter to be sure none are shorted. If you have an
oscilloscope apply power to the keyboard and check for a 50 KHz signal on pin 40
of IC-1. If you obtain no signal check for 5 volts on pin 1, -12 on pin 18 and
ground on pin 17.
Repair Procedure
Repairs will be made on a basic rate charge plus parts. The basic rate for
the KBD-5 is $10.00. If you must return your KBD-5 please send the $10.00-in the
form of a money order or cashiers check along with the keyboard. When repairs
are finished the keyboard will be returned to you COD for parts charges, if any.
Do Not send personal checks for repair work.
Pack all parts to be returned carefully and insure. We will not accept
delivery on any parcels that arrive in damaged condition. Make check or money
order payable to Southwest Technical Products Corporation.
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部品番号部品説明メーカ
AY-5-2376

Keyboard and Encoder

Swtpc
Swtpc


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