CCE HPS-1407, Руководство по обслуживанию, Страница: 15 / 52

HPS-2007
14
2.3.3 FRAME ASPECT RELATED
a) Connect the receiver under test 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 the heat period.
b) Apply to the antenna input a 60dB
µ
V level signal with 88% modulated PHILIPS pattern
(Frequency and channel factory defined)
c) Adjust bright and contrast control to nominal position
d) For the next reads, please utilizes figure C for reference.
e) Observe the screen pattern and check the distances a, b, c, d (in centimeters)
f) Apply the formula:
M = (a + b + c + d) / 4 , and verify the proportion a/M, b/M, c/M e d/M.
Check for systems PAL-M and PAL-N
Minimum Nominal Maximum Unit
a/M 0,95 1,00 1,05
b/M 0,95 1,00 1,05
c/M 0,95 1,00 1,05
d/M 0,95 1,00 1,05