CCE HPS-1478, Руководство по обслуживанию

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HPS-1478
3.2.5 High Voltage (EHT)
a) Connect a DC voltmeter to the resistor wired to the Fly Back ABL pin (the
position and value of this resist is defined by each model.
b) Connect a high voltage electronic DC voltmeter (over 1G impedance) in the
electronic tube high voltage plug.
c) Adjust the bright, color and contrast controls to minimum and read the high
voltage E.H.T. (I
A
min).
d) Adjust the bright control to the maximum position, contrast control to the
maximum position and monitoring the voltage through the ABL resistor,
adjust the bright control until the DC voltage reached the specific value. The
anode electric current will now be define by the following equation:
I
A
=(V
ABL
/R
ABL
)
Read the high voltage E.H.T. in this conditions (I
A
min).
Condition Minimum Nominal Maximum Unit
I
A
min. 22.30 23.50 24.75 kV
DC
I
A
=1mA 20.60 21.70 22.85 kV
DC
3.2.6 Dielectric Rigid
Adjust the HI_POT equipment to 1500 Vac voltage, and the desired test current, in
accordance with the below specification table. When the TV set has a power
switch, make sure that this switch stay in the ON mode. Connect the ground
terminal of the test equipment in both pins of the line cord TV, and apply the HI-
POT terminal (1.5KV) in every extern metal parts of the TV under test for one
minute. In this condition the electric current must be equal or inferior that shown in
the below specific table
Condition Minimum Nominal Maximum Unit
1500V
AC
- - 2,00 mA
AC