2 Safety Precautions
2.1. General Guidelines
1. 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.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
2.2. Touch-Current Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents 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 Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reserve the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUGH CURRENT) expressed as voltage U
1
and U
2
, does not exceed the following values:
For a. c.: U
1
= 35 V (peak) and U
2
= 0.35 V (peak);
For d. c.: U
1
= 1.0 V,
Note:
The limit value of U
2
= 0.35 V (peak) for a. c. and U
1
= 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0
mA d. c.
The limit value U
1
= 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out 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.
Figure 1
6
TH-50PV700F / TH-50PV700P / TH-50PX700B / TH-50PX700E
Summary of Contents for TH-50PV700F
Page 5: ...1 Applicable signals 5 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 21: ...8 2 Lead of Wiring 2 21 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 25: ...9 4 No Picture 25 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 62: ...TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E 62 ...
Page 120: ...16 2 Packing Exploded Views 1 120 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 121: ...16 3 Packing Exploded Views 2 121 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 122: ...16 4 Packing Exploded Views PX700B Only 122 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 123: ...16 5 Packing Exploded Views Except PX700B 123 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 124: ...16 6 Packing Exploded Views Stand 124 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...
Page 125: ...16 7 Replacement Parts List Notes 125 TH 50PV700F TH 50PV700P TH 50PX700B TH 50PX700E ...