Memorex CP8 TURBO UNIVERSAL REMOTE CONTROL Manual de usuario descargar pdf (Pagina 65)

100

The

power transformer

should be mounted in

the

cabinet

with

the mains terminals

facing inward. Before doing that,

however, solder two short lengths of mains

-rated

cable to the

117 -volt AC terminals, and sleeve the terminals

with

plastic

tubing. The

transformer

can then be screwed to the side

of the

cabinet using self -tapping screws. Install an

Earth (ground)

solder lug

under

one of the mounting screws. That

solder lug

should be secured

with

a lock

washer,

to ensure a positive

connection.

The

primary

leads from the transformer

are

connected

to a

two

-way mains

terminal

block. That should

be screwed to one

of the front -panel cleats. Make

sure that the mains cord

securely clamped and terminate the active (brown)

and neu-

tral (blue) leads as

shown in Fig. 3. The Earth

wire

(green/

yellow)

is soldered

the solder lug

secured by one of the

transformer mounting

screws.

The idea to keep in mind

when

doing

the mains

wiring

is to

make sure that it is

not

possible

for anyone to come

into

contact

with

exposed

active

wiring,

even

if their hands are

probing

where

they

shouldn't be.

Note: The metal case of the radio

must be connected to

mains

ground. That means that you must have a

wire running

The car radio, power -supply board, and

twin speakers are

shown

here mounted in its home -made enclosure. Note the

location of

the

power

transformer (right). The power transformer should

mounted in the

cabinet

with the mans terminals

facing inward.

POWER

AMP

FADER

40S2

SPEAKER

GROUNO1

POWER

AMP

FADER

40Si

SPEAKER

GROUNDJ,

RADIO

POWER

MEMORY

LEFT

SPEAKER

RIGHI

SPEAKER

POWER

ANTENNA

INPUT

MEMORY

-v

LEFT

SPEAKER

RIGHT

SPEAKER

TO POWER

ANTENNA

INPUT

MEMORY

-v

Fig.

5 -Shown here are

hookups

for radios with front back

fader

controls (normally used with four peakers).

Connect

the front

and back outputs together as indicated: Shown

"A" are the

output

connections for the typical car radio:

while

"B" shows

how

to connect the output of higher -

powered units with bridged outputs.

ANTENNA

100CM

WIRE

ANTENNA

PLUG

CASE

N A

11/VAC

RADIO

ANTENNA

FADER

SPEAKER

GROUND

CLOCK MEMORY

POWER

SUPPLY

-V

MEMORY

LEFT

SPFAKE R

RIGHT

SPEAKER

POWER

Fig.

6 -Shown

here are

the final

connections

that

must be made to

put the In -Home

Car

Radio into op-

eration.

Re-

member. S1 (the

power switch)

should be used

only

in the units

that need it. If the

radio that

you

choose has a digi-

tal clock, or station

memory. incorpo-

rated into its de-

sign, use the units

own

power

switch,

switching

the

ra-

dio off

via

would

also turn off

the

clock.

from the radio case

to the transformer

mounting

foot, as

shown

the

wiring diagram.

If that

wire

is omitted,

the radio

will

be completely

unusable

on the AM band,

due to a

very

loud rectifier buzz.

Also note that the

mains

wiring

and power

supply should be mounted

as far away

possible

from the

antenna

socket of the radio to minimize mains

interference.

The next step is to

assemble and

install a simple

antenna.

Cut a

3 -foot length

of stranded hookup

wire

and

solder it to a

standard banana plug.

The antenna

can then be plugged

into

the radio.

On the prototype, the

antenna

was

stapled to the

inside of

the cabinet. But usually

will

be better to simply drape

the

cable

out

the

back, but away

from

the

mains cord.

Finally, interconnect

the

various sub

-assemblies

in the

manner indicated in Fig.

Once

done and you are

satisfied

with the integrity of your

work, prepare for the big

moment.

Disconnect all the in -line fuses to the

radio, so that

no power

can

be applied to it.

Apply mains power and

check that the

voltage

from the power

supply is close to 13.4

volts. A

voltage within 0.5

-volts

of 13.4

-volts can be considered OK.

If that checks

out power down, reconnect

the in -line fuses,

and reapply power.

Now turn the radio

with

its own on

/off

switch. There

should be a

soft

thump

from the

speakers and

you

should be able to tune

stations in the normal

way.

If your radio is manually tuned,

will

necessary to peak

the antenna

trimmer for the best

AM reception. That

adjust-

ment is normally

be found next to the antenna

jack, although

it can also be

situated on the front of the case

behind the dress

panel.

To make the adjustment,

tune in a

weak station

near

1400 kHz, then peak

the trimmer for maximum

volume.

The

final step is to fit the

rear panel. That's

it -your new

table

radio is now ready for use.

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