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FOCUS
SWITCH
HORIZONTAL
LINEARITY
HI
HORIZONTAL DRIVE
B2l
WIDTH CONTROL
VERTICAL LINEARITY CONTROL
HEIGHT CONTROL
CABINET-REAR VIEW
MISCELLANEOUS
ADJUSTMENTS
HORIZONTAL LOCK
HORIZONTAL SWEEP CIRCUIT ADJUSTMENT
Connect a short between terminals C and D of L37 .
Turn the set on and tune in a TV station, preferably a test pattern.
Turn the horizontal hold control to maximum clockwise and adjust the horizontal frequency slug (Bl) until the blanking signal appears as a
single vertical line in the picture.
Turn the hold control 1/4 turn counter-clockwise to synchronize the picture.
Adjust the horizontal drive trimmer (B2) clockwise as far as possible without crowding the right side of the picture.
Adjust the width control until picture is of proper width.
Adjust the horizontal linearity slug (B3) until the picture is symmetrical from left to right, slight readjustment of B2 may be required for
optimum results.
Turn the hold control fully counter-clockwise and interrupt the signal by switching to another channel and back again.
Turn the hold control clockwise and note the least number of bars present just before the picture pulls into synchronization.
Adjust the horizontal locking trimmer (B4) until 7 to 9 bars are present just before pull in.
HORIZONTAL WAVEFORM ADJUSTMENT
Remove the short from terminals C and D of L37,
Turn the horizontal hold control fully clockwise and adjust the waveform slug (B5) until the blanking signal appears as a single vertical line
in the raster.
Turn the hold control 1/4 turn counter-clockwise to synchronize the picture.
Cunnect the vertical input of an oscilloscope to terminal C of L37.
Adjust the horizontal waveform slug (B5) until the broad and narrow peaks of the waveform are of equal height as shown in figure 9. If
necessary during adjustment of B5 turn the hold control to keep the picture in synchronization.
Turn the hold control to maximum counter-clockwise and momentarily remove the signal. Adjust B4 until two bars are present just before
the picture pulls into synchronization as the hold control is turned clockwise.
Turn the hold control to maximum clockwise and adjust Bl until the blanking bar appears is the raster.
Turn the hold control 1/4 turn counter-clockwise to synchronize the picture.
AGC SWITCH ADJUSTMENT
Inastrongsignal area the normal position of the switch is counter-clockwise. If interference of the impulse type is encountered turn the
switch to the center position. In very weak signal areas, turn the switch clockwise.
FM TRAP ADJUSTMENT
If interference is encountered from a strong FM station signal it may be possible to eleminate it by adjusting A38. Adjust A38 for minimum
interference in the picture.
ADJUST
FOR EQUAL PEAKS-
F I G . 9
PAGE 9
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