3.4 Purity
a) Connect the receiver to a 117V
AC
line
Turn on the TV and adjust bright to nominal position and contrast control to
min. position, saturation and volume to min. position.
b) Apply to the antenna input a 60dBµV level signal with 88% modulated
“WHITE” pattern (frequency and channel factory defined).
c) Wait for pre-heating period (30 minutes).
d) Degauss the device appropriated.
e) Increment the contrast controls to max. position, and wait for 3 minutes
f) At a distance of 5 times the height of the screen, observe that no color dirty
may appear.
g) Repeat this procedures now utilizing a red pattern.
Note:
ü If the receiver is moved during the test procedure, always degauss again the
device
3.5 Convergence
a) Connect the receiver to a 117V
AC
line.
Turn on the TV and adjust bright and contrast control to max.. position,
saturation and volume to min. position. Wait for pre-heating period (please
see specification for each model).
b) Apply to the antenna input a 60dBµV level signal with 88% modulated
“CROSSHATCH” pattern (frequency and channel factory defined).
c) Turn the face tube to West/Lest orientation.
d) Degauss the device properly.
e) Adjust bright and contrast control to minimum position.
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