Commodore 64 User Manual page 15

Unless your TV/game switch box already has a
75 ohm connector, you will need a 75-300
ohm transformer, available from your cable TV
company or from most video stores.
First, unscrew the TV cable from the TV, and
then screw the cable into the threaded end (F
connector] of the transformer.
STEP 5
Then, connect the spade connectors of the
transformer under the screws on the bottom
of the TV/game switch box. Then attach the
spade connectors on the wire coming out of
the TV/game switch box to the VHF antenna
screws on the back of the TV.
If you have this type of TV cable and the TV
does not work with the computer after you've
completed all the steps in this chapter, you
also may need to change a switch or connect
a jumper wire on the back of the TV. Your TV
manual should tell you if you need to do this,
or the store where you bought the TV or com
puter can probably help.
HOOKING UP THE MODULATOR—VIC
20 ONLY
IF YOU ARE CONNECTING A 64 COMPUTER
TO A TV, the modulator is already built into
the computer's case. Skip to Step 10 in the
next section, "Making the Cable Connec
tions—Commodore 64."
IF YOU ARE CONNECTING A VIC 20 TO A
TV, follow Steps 6-9.
STEP 6
Turn the VIC so you can see the back clearly.
Notice that the back has several slots, one on
your left and two on your right. Between
these slots are two holes for circular connec
tors. The TV output hole is the one to the left
[the one with five pins). This is where you
attach the cable from the modulator, through
its five-pin connector [often called the DIN
connector}.
STEP 7
Now attach the modulator cable to the TV
output hole on the back of the VIC.
STEP 8
Next, find the small slide switch marked CH3
and CH4, located at the end of the modulator
box closest to the cord. These marks stand for
TV Channels 3 and 4. Slide the switch toward
the mark for the channel that is least used in
your area. Even if both are local stations, the
computer will still work.
STEPS
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