2
features. They are indicated with shadow in the circuit diagram. Please carefully read the detail
list before changing these components.
1.2.3
If the fuse is blown, please change it for the one designated in the list of components.
1.2.4
When changing resistors of 1w or bigger than 1w in PCB, make sure to separate them from the
PCB by10 mm.
1.2.5
Make sure that the wire stays far away from the high voltage or high temperature components.
1.2.6
Check for the AC leakage current of the metal components exposed out of the cover such as
antenna terminal, screw, metal surface and control axis. Make sure that the cabinet of TV set is
absolutely safe in operation, free from any risk in electric shock. Insert the power supply plug
directly into the 110V (or 220V) AC socket (No isolate transformer will be applied during the test).
Use an AC voltage meter with sensitivity of 5 k
Ω
or higher per volt to measure the leakage
current according to the following steps:
First, connect in parallel a resistor of 1.5 k
Ω
,10 W and a 0.15
μ
F capacitor (AC type) between
the known good earthing connector (such as underground metal tube) and the exposed metal
parts out of the cabinet. Measure AC voltage across both terminals. Then exchange the two pins
of AC before re-measuring every exposed metal parts. The measured value of voltage should
not exceed 0.3V effective value, which corresponds to current.0.2mA. If the value exceeds this
specified value, aligning must be made at once.
Figure 1
1.2. 7 DC voltage breakdown test
The following touchable parts must be subject to 1s anti voltage test before packing. The
voltage is applied between the plug pin of the power supply and the exposed metal parts for the
test and the volt value should be AC 3000V.
Parts designation:
Position:
Antenna terminal
Back cover
External cover screw
Back cover
AV interface
Back cover
AC Volt Meter
Good Earth Connect Point
(Such as underground metal etc)
This detector is placed
respectively at every
exposed metal parts.
Содержание TS2192
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