Commodore Amiga 520 Reference manual

Introduction to the
Cr Commodore' ^=-mM=
AMIGA ~^£\3
Video Adapter
fortheA500

Introduction to the
C= Commodore =~~
AMIGA jMj
VIDEO ADAPTER
for the A500

FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE
STATEMENT
This equipment generates and uses radio frequew energ; ... ivcd properly.
that is, in strict accordance with the manufacturer 'sinsit net ions, may cause interference to radio and
television reception. It has been type tested ami found to comply with the limits (or aClass B
computing device in accordance with the specifications in Subpart II .<: t\.ri I>•• ICC rules, which
arc designed to provide reasonable protection against s-,:li uiteiteiciicc in ., res id emu! installation.
However, there is no guarantee that interference will not occur in aparticular installation. If this
equipment docs 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:
—Reorient the receiving antenna
—Relocate the compute] with respect to receiver
—Move the computer away from the receiver
—Plug the computer into adifferent outlet .so that computer anil receiver are on different branch
If necessary, the user should consult the dealer or ats experienced radio television technician tor
additional suggestions., The user may lind the following booklet prepared by the Federal Communi-
cations Commission helpful:
'"How to Identify and Resolve Radio-TV Interference Problems."
it Printing Office. Washington, DC 20402. Stock
The use of anon-shielded interface cable with this device is prohibited.
CAUTION: If the house AC wall receptacle is not the 3-prongeu
1type contact an
install the correct 3-pronged receptacle.
Copyright ©1987 by Commodore Electronics Limited
All rights reserved
This manual contains copyrighted and proprietary information. No pan of this public
reproduced, stored in aretrieval system, or transmitted in any form or by any mean
mechanical, photocopying, recording or otherwise, without the prior written pcnnissio
dure Hlcctrimics Limited.
,electronic.
,of Commo-
Amiga is aregistered trademark of Commodore Amiga, Inc.
Commodore is aregistered trademark of Commodore Lleeuonies Limited.
The Commodore logo is aregistered trademark of Commodore Llectronics Limited.
CONTENTS
What is the Amiga 520 Video Adapter?
What comes with the Video Adapter?
The Parts of the A520
How to Connect an American (NTSC) TV set
For TVs with 300-ohm antenna wires
For TVs with 75-ohm antenna wires
How to Connect aComposite Monitor?
If you have aproblem. . .
Trouble-shooting chart

What is the AMIGA 520 Video Adapter?
The Commodore Amiga Video Adapter is adevice thai allows you to conned your Amiga
500 to aTV set or a composite video monitor. It does this by converting the RGB video
Signal the Amiga produces for RGB monitors to acomposite video signal that aTV or
composite monitor can interpret.
What comes with the Video Adapter?
-Amiga 520 adapter
-TV switch box
TV connector cable
-Introduction to the Commodore Amiga 520
If any of these items are missing or damaged, c
the box to protect your equipment if you need t

The Parts of the A520
The front and right side of the A520
For TVs with 300-ohm Antenna Wires
Ss, RGB Connector-—connects the A520 to the Amiga.
TIk: hack of the A520
Channel Selector Switch
How to connect a(NTSC) TV set
How you connect your Amiga to atelevision
iyour TV has. There are two types of a
-Hat 300-ohm wire
-Round 75-ohm coaxial cable
I. Make sure both the TV and the Amiga are OFF.
WARNING: Before connecting any cables, make
sure the power to the computer is OFF, to avoid
damaging cither unit.
Grasp the A520 and line up its RGB connector
with the RGB video port on the back of the
computer. The two should lit together with just a
slight push. (If they do not ,chuck that the pins in
the A500*s connector are straight and that the
A520 is right side up. Now try again.)
3. Disconnect the two VHF a
VHF terminals of the TV,
Reconnect the VHF term
2-pronged short fiat wire
switch box.
ithe side of the TV
»ct the TV's VHF antenna wires b
sat the bottom of the TV switch box,
:
marked CONNECT TO ANTENNA.
6. Slide the selector switch on the TV s
the position marked COMPUTER.
Plug one end of the TV connector cable into the
jack marked COMPUTER at the top of the TV
switch box.

.Plug the other end of the TV connector cable i
the A520's RF OUT port.
Connect the main stem of the y-audio cable i;
the AUDIO IN port on the side of the A520.
10. Connect the other two ends of the y-audio cable
to the LAUDIO and RAUDIO on the back of the
Amiga. (It does not matter which side of the
y-audio cable you connect to the Lof RAUDIO.
)
NOTE: If you want to connect the Amiga's audio
output to your stereo, rather than your TV\ you
must buy two additional cables, called "RCA
plug to RCA plug," (available in most electron-
ics or hardware stores) to connect to your particu-
lar stereo. Connect the two cables from the Land
RAUDIO ports on the computer to the Land R
AUX inputs on your amplifier and select AUX
input on your stereo.
11. Set the channel selector switch i
channel 3or channel 4,whicheve
ithe A520 to
is not used for
12. Set the channel <
channel.
your TV set to the same
13. Plug the TV set and [he Amiga into a3-pronged
I'lixlriLa] outlet.
CAUTION: If the house AC wall outlet is not the 3-
pronged type, contact an electrician to install the
correct 3-pronged outlet. If amulti-connector
box is used to connect the computer and peri-
pherals to the AC line, the AC ground must be
common to all units. Contact an electrician if you
are not sure if your system is grounded properly.
14. Check your connections.
L
15. Turn the television and the Amiga ON. Your
Amiga is now ready to use.

For TVs with 75-ohm Antenna Wires
If your antenna cable is the round 75-ohm type, you will need f
adapters (available in most electronics or hardware stores).
)75-ohm to 300-ohm
Use one of the adapters to attach the VHF antenna cable to the screw
the TV switch box, and the other to attach the TV switch box's ante
television's VHF terminals. After attaching the necessary converters t
follow the directions for TVs with 30(hoh»i Antenna Wires.
How to Connect aComposite Monitor
OFF.
WARNING: lid ore ting any cables, make
sure the power to the computer is OFF, to avoid
damaging either unit.
2. Grasp the A520 and line up its RGB connector
with the RGB video port on tile back of the com-
puter. The two should fit together with just a slight
push. {If they do not, check that the pins in the
A5(X)'s connector are straight and that the A520 is
right side up. Now try again.)
If your monitor has its own cable, connect this
cable to the VIDEO OUT port on the A520. Other-
wise, connect one end of the TV connector cable
to the VIDEO IN port on the monitor and the other
end to VIDEO OUT on the A520.
istem of the y-audio cable i
Connect the other two ends of the y-audio cable to
the LAUDIO and RAUDIO on the back of the

NOTE; If you want to connect the Amiga's audio
output to your stereo, rather than your TV. you
must buy two additional cables, called "RCA plug
to RCA plug," (available in most electronics or
hardware stores) to connect to your particular
stereo. Connect the two cables from the Land
RAUDIO ports on the computer to the Land R
AUX inputs on your amplifier and select AUX input
on your stereo.
6. Plug the monitor and the Amiga into a.i-proiiiZL-i!
electrical outlet,
CAUTION: If the house AC wall outlet is not the 3-
pronged type, contact an electrician to install the
correct 3-pronged outlet- If amulti-connector box
is used to connect the computer and peripherals to
the AC line, the AC ground mus
all units. Contact an electrician if you a
if your system is grounded properly
.
Check your
Turn the monitor and the Amiga ON .Your Amiga
is now ready to use.
If You Have aProblem . . .
If the screen display is not clear, try adjusting the controls on your television set or
monitor. You may not get apicture at all if your control settings or connections are not
correct. In such acase you should check all your settings and connections. Often the TV
may simply be tuned to the wrong channel, or you may have the brightness turned off.
The Trouble-shooting Chart shown on the following pages lists some of the more common
problems and tells how to correct them.
If you check the connectioas and still can't get the computer to work, call CUSTOMER
SUPPORT:
[phone]
Commodore CUSTOMER SERVICE personnel at this number will help you find and
correct the problem. If the problem cannot be corrected over the phone, you will be given
the number of the Commodore service facility nearest you. Commodore has over 750
independent companies, including the RCA Service Company, ready to provide nation-
wide service and maintenance for your Commodore equipment.
Most set-up and start-up problems arc simple and can be diagnosed over the phone. By
calling CUSTOMER SUPPORT, you can probably avoid an unnecessary trip to the
service facility. More important, you can continue to use your equipment.
Remember—Call the CUSTOMER SUPPORT number before you take any equip-
ment in for warranty service.

TROUBLE-SHOOTING CHART
Indicator liulil not 'ON"
No picture (Monito!
;
Moniiur noi conrvclcil
Antenna Mill c
Computer and/or TV set
for wrong channel
TV receives regular
broadcasts even though \>
is properly connected to
the computer, and the
computer is ON
Make sure power switch
in ON position.
Check power socket Tor
loose or disconnected
power cable.
Check connection with
wall outlet.
Check the hack of your
TV. [f Lt has aswitch to
switch for EXTERNAL.
Check computer hookup to
VHF antenna terminal; see
page 3for details.
Cable to TV not plugged Check output cable
Set computer to same
channel as TV [3 or 4).
Check that TV switch box
is set to COMPUTER
Sound with excess
background noise
Picture OK, but c
AUX input on external
amplifier not proper!}
connected
Connect sound jack to
AUX input on amplifier
and select AUX input.
Sound OK, but rtings See ""No picture" listings
Computer displays garbled
symbols on the screen
Pull plug on power supply
and allow computer to
cool down. (Make sure air
How around power supply
is not restricted.)
Severe interferen Older Model TV Rotate TV set. Adjust
vert.,horiz. and/or control
knobs to make interference

COMMODORE8
Commodore Business Machines. Inc.
1200 Wilson Drive •Wesi Chester. PA 19380
Commodore Business Machines, Limited
3470 Pharmacy Avenue •Agincourt, Ontario MIW3G3