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3.
RECEIVER INSTALLATION — Locate the re-
ceiver where a minimum of bright light falls directly
on the screen, although complete darkness is not recom
mended.
Provide adequate ventilation by keeping the
back of the receiver away from the wall.
struct the ventilating slots at the rear of the cabinet.
All models are provided with a protective enclos
ure for the end of the kinescope.
fastened to the rear of the chassis.
ercised during installation so as not to strike or jar
the enclosure.
After completion of antenna and power connec
tions, operate the receiver as outlined in Section III.
If a receiver fails to operate, or if operation is unsat
isfactory, proceed with the following checks and ad
justments.
CAUTION
Only experienced personnel should attempt to make
these adjustments, as high voltage of ten kilovolts
is present at the kinescope.
a.
M ECH AN ICAL
A D JU S T M E N T S :
models, remove the chassis back and check all
tubes to make certain they are firmly seated in
their sockets.
Remove the kinescope enclosure
and check the seating of the base plug.
the high-voltage anode connector.
The deflection yoke and focus coil have been prop
erly positioned at the factory. The kinestope should
be seated back against the edges of the deflection
yoke assembly.
Inspect the assembly to make
certain that all adjustment wingnuts are tight.
The ion trap should be positioned approximately
over the two internal flags near the base of the
kinescope.
b.
ELECTRICAL A D JU STM E N TS: An adapter
line cord is required to operate the receiver for
the following preliminary adjustments.
1.
OPERATING CONTROLS—The operation and
function of the front-panel controls is identical for all
models.
Seven controls are provided, as shown in fig
ure 3-1.
2.
TUNING— Tuning the receiver initially requires
operation of the various controls as indicated.
a.
STA TIO N S E L E C T IO N :
1) Turn the O FF-VO LU M E control clockwise
approximately a quarter-turn. This turns the
receiver on and sets the sound volume to a
reasonable level.
2) Set the SELECTOR control so that the desired
channel number is indicated on the edge of the
control.
This control may be rotated in either
direction.
3) Allow approximately 15 seconds for warmup.
(This time is necessary to allow the tubes to
attain the proper temperature for operation.)
4) If the desired station is broadcasting, music or
speech will be heard.
control for best picture quality.
V O LU M E or desired sound level.
5) Rotate the C O N TR AST control to its extreme
counter-clockwise position.
Do not ob
The enclosure is
Care should be ex
For
all
Inspect
Section 3.
O P E R A T I O N
Adjust the TU N IN G
Readjust the
Scanned by mbear2k - Jan 20121/17
1) Turn the O FF-VO LU M E control a quarter-
turn clockwise to turn on the receiver.
BRIGHTN ESS control a half-turn clockwise
and turn the C O N TR A ST control countei-
clockwise.
Allow the tubes to warm up.
2) Set the SELECTOR control to an active chan
nel and adjust the TU N IN G control for best
picture quality.
A test pattern is preferable
for these adjustments.
3) Adjust the ion trap magnet by moving slowly
forward or backward while rotating slightly
around the neck of the kinescope to obtain
maximum
picture
brightness.
BRIGH TN ESS control setting until the pat
tern is at approximately normal brilliancy. A d
just the FOCUS control, at the rear of the
chassis, for maximum sharpness of raster lines.
Then readjust the ion trap for maximum bril
liancy.
4) Adjustment of the deflection yoke assembly is
required if the raster is not horizontal.
the center wingnut and rotate the assembly
slightly to correct this condition.
5) Centering of the raster in the mask is con
trolled by both electrical and mechanical ad
justments, or by mechanical adjustments alone.
If this adjustment is required, refer to Section
V for operation of the chassis tontrols and po
sitioning of the focus coil.
6) All electrical adjustments at the rear of the
chassis have been set at the factory. If the set
tings have been disturbed or if the kinescope
requires replacement, they must be carefully
readjusted in accordance with the procedure
outlined in Section V.
AOUSTS RECEIVER
FOR BEST PICTURE
Figure 3-1— Front Panel Controls
Emerson Radio
Set the
Reduce
the
Loosen
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