CCE HPS-1478, Руководство по обслуживанию

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HPS-1478
Minimum Nominal Maximum Unit
30,00 40,00 60,00 dB
3.2 POWER SUPPLY
3.2.1 Consume
Consume
a) Connect the TV under test through an electronic wattmeter at the
234Vac/60Hz line.
b) Turn-on the TV set and apply a 60dB
µ
V (the preferred channel must to be
defined by the production unit), modulated with a 88% video signal white
pattern, and a
±
25 kHz deviation FM carrier with a 1kHz sine wave audio
signal.
c) Adjust for max. the bright, contrast and volume controls, and read the Sink
Power show at the wattmeter.
d) Active Standby mode and read again the Sink power.
e) Repeat all below procedures, connecting now the television under test to a
117Vac/60 Hz line.
Condition Minimum Nominal Maximum Unit
117V
AC
“PP” - 42.0 52.0 W
117V
AC
Stand-By - 8.5 10.0 W
234V
AC
“PP” - 42.0 52.0 W
234V
AC
Stand-By - 9.0 12.0 W
3.2.2 Main Power Supply
a) Connect the TV set under test to 117Vac/60Hz line.
b) Turn On the TV set and apply a 60dB
µ
V RF signal modulated by a white
pattern video signal and a 4.5 MHz +- 25 kHz deviation FM signal
modulated by a 1kHz audio signal (the preferred channel will be defined by
the local unit).
c) Adjust the TV to a “PP” condition.
d) Utilizing an electronic DC voltmeter (over 10 M input impedance), read the
next point in the power supply:
Condition Test Point Minimum Nominal Maximum Unit
“PP” 117V
AC
+B 103V (Cathode of D807) 102.00 103.00 104.00 V
DC
“PP” 117V
AC
+B 16V (Cathode of D808) 14.00 15.50 16.50 V
DC