2.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the equipment such as screwheads, connectors,
control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be between
1Mohm and 5.2Mohm.
When the exposed metal does not have a return path to
the chassis, the reading must be
.
Figure 1
2.1.2. Leakage Current Hot Check (See
Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use an
isolation transformer for this check.
2. Connect a 1.5kohm, 10 watts resistor, in parallel with a
0.15µF capacitors, between each exposed metallic part on
the set and a good earth ground such as a water pipe, as
shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the
above measurements.
6. The potential at any point should not exceed 0.75 volts
RMS. A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current
must
not
exceed
1/2
milliamp.
In
case
a
measurement is outside of the limits specified, there is a
possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the
customer.
2 Safety Precautions
2.1. General Guidelines
1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.
2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the wires
have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.
3. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight out.
4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
5
TH-37PR10U / TH-42PR10U
Содержание TH37PR10U - 37" PLASMA TELEVISION
Страница 4: ...1 Applicable signals 4 TH 37PR10U TH 42PR10U ...
Страница 28: ...8 1 2 Lead wiring 2 The lead wiring is dressed as shown in figure 28 TH 37PR10U TH 42PR10U ...
Страница 29: ...8 1 3 Lead wiring 3 The lead wiring is dressed as shown in figure 29 TH 37PR10U TH 42PR10U ...
Страница 31: ...8 2 2 Lead wiring 2 The lead wiring is dressed as shown in figure 31 TH 37PR10U TH 42PR10U ...
Страница 32: ...8 2 3 Lead wiring 3 The lead wiring is dressed as shown in figure 32 TH 37PR10U TH 42PR10U ...
Страница 35: ...9 4 Adjustment Volume Location 9 4 1 TH 37PR10U 9 4 2 TH 42PR10U 35 TH 37PR10U TH 42PR10U ...
Страница 36: ...9 5 Test Point Location 9 5 1 TH 37PR10U 9 5 2 TH 42PR10U 36 TH 37PR10U TH 42PR10U ...
Страница 40: ...10 2 IIC mode structure following items value is sample data 40 TH 37PR10U TH 42PR10U ...
Страница 42: ...42 TH 37PR10U TH 42PR10U ...
Страница 44: ...44 TH 37PR10U TH 42PR10U ...
Страница 49: ...13 Option Setting 49 TH 37PR10U TH 42PR10U ...
Страница 78: ...NOTE TH 37PR10U TH 42PR10U 78 ...
Страница 79: ...15 Block and Schematic Diagram 15 1 Schematic Diagram Notes TH 37PR10U TH 42PR10U 79 ...
Страница 137: ...16 Parts Location 16 1 Exploded View 16 1 1 TH 37PR10U 137 TH 37PR10U TH 42PR10U ...
Страница 138: ...16 1 2 TH 42PR10U 138 TH 37PR10U TH 42PR10U ...
Страница 140: ...16 2 Cable relation 16 2 1 TH 37PR10U 16 2 2 TH 42PR10U 140 TH 37PR10U TH 42PR10U ...
Страница 141: ...16 3 Accessories Box 141 TH 37PR10U TH 42PR10U ...
Страница 143: ...18 Replacement Parts List 18 1 Relpacement Parts List Notes 143 TH 37PR10U TH 42PR10U ...