HPS-2007
10
2.2.3
Main Power Supply Regulation with fluctuation of the line
a)
Repeat the procedure of the item 2.2 when the television is connected to the electric net
with 100VAC/60Hz and also 240VAC/60Hz.
Condition
Test Point
Minimum
Nominal
Maximum
Unit
“PP” 240V
AC
+B 103V (Cathode of D807)
102.00
103.00
104.00
V
DC
“PP” 240V
AC
+B 16V (Cathode of D808)
14.00
15.50
16.50
V
DC
Condition
Test Point
Minimum
Nominal
Maximum
Unit
“PP” 100V
AC
+B 103V (Cathode of D807)
102.00
103.00
104.00
V
DC
“PP” 100V
AC
+B 16V (Cathode of D808)
14.00
15.50
16.50
V
DC
2.4
Auxiliary power supply from Fly Back Transformer.
a)
Connect the TV under test to a 117 Vac/60 Hz 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
(Frequency and channel factory defined).
c)
Adjust the TV to a “PP” condition.
d)
Utilizing a electronic DC voltmeter (over 10 M input impedance), read the auxiliary power
supply from Fly-Back transformer :
e)
Read the RMS voltage apply to the CRT heat., Utilizing a true RMS voltmeter.
f)
When exist, read the auxiliary wind Peak to peak voltage, utilizing an oscilloscope.
Condition
Test Point
Minimum
Nominal
Maximum
Unit
“PP” 117V
AC
E+12V (Cathode do D402)
+11.00
+12.00
+13.00
V
DC
“PP” 117V
AC
E-12V (Anode do D403)
-11.00
-12.00
-13.00
V
DC
“PP” 117V
AC
E180V (Anode do D404)
165.00
175.00
185.00
V
DC
“PP” 117V
AC
Heater (RMS) (Pins 5 and 4 of
V901)
5.70
6.30
6.90
V
RMS
