3
1 Safety Precautions
1.1.
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 Fasten 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.
1.1.1.
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 metal-
lic cabinet part on the equipment such as screwheads,
connectors, control shafts, etc. When the exposed metal-
lic 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
.
1.1.2.
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
0.15
μ
F 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 sensi-
tivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the volt-
age 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 measure-
ment 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.
Figure 1
Summary of Contents for VIERA TC-P50GT30
Page 20: ...20 7 4 No Picture ...
Page 33: ...33 ...
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Page 42: ...42 12 4 Wiring 3 ...
Page 43: ...43 12 5 Wiring 4 ...
Page 44: ...44 12 6 Wiring 5 ...
Page 45: ...45 12 7 Wiring 6 ...
Page 46: ...46 12 8 Wiring 7 ...
Page 47: ...Model No TC P50GT30 Schematic Diagram Note S 1 ...
Page 48: ...Model No TC P50GT30 Replacement Parts List Note S 2 ...
Page 49: ...Model No TC P50GT30 P Board 1 2 and P2 Board S 3 ...
Page 50: ...Model No TC P50GT30 P Board 2 2 S 4 ...
Page 51: ...Model No TC P50GT30 A Board 1 14 S 5 ...
Page 52: ...Model No TC P50GT30 A Board 2 14 S 6 ...
Page 53: ...Model No TC P50GT30 A Board 3 14 S 7 ...
Page 54: ...Model No TC P50GT30 A Board 4 14 S 8 ...
Page 55: ...Model No TC P50GT30 A Board 5 14 S 9 ...
Page 56: ...Model No TC P50GT30 A Board 6 14 S 10 ...
Page 57: ...Model No TC P50GT30 A Board 7 14 S 11 ...
Page 58: ...Model No TC P50GT30 A Board 8 14 S 12 ...
Page 59: ...Model No TC P50GT30 A Board 9 14 S 13 ...
Page 60: ...Model No TC P50GT30 A Board 10 14 S 14 ...
Page 61: ...Model No TC P50GT30 A Board 11 14 S 15 ...
Page 62: ...Model No TC P50GT30 A Board 12 14 S 16 ...
Page 63: ...Model No TC P50GT30 A Board 13 14 S 17 ...
Page 64: ...Model No TC P50GT30 A Board 14 14 S 18 ...
Page 65: ...Model No TC P50GT30 K S and V Board S 19 ...
Page 66: ...Model No TC P50GT30 C1 Board S 20 ...
Page 67: ...Model No TC P50GT30 C2 Board 1 2 S 21 ...
Page 68: ...Model No TC P50GT30 C2 Board 2 2 S 22 ...
Page 69: ...Model No TC P50GT30 C3 Board 1 2 S 23 ...
Page 70: ...Model No TC P50GT30 C3 Board 2 2 S 24 ...
Page 71: ...Model No TC P50GT30 SC Board 1 4 S 25 ...
Page 72: ...Model No TC P50GT30 SC Board 2 4 S 26 ...
Page 73: ...Model No TC P50GT30 SC Board 3 4 S 27 ...
Page 74: ...Model No TC P50GT30 SC Board 4 4 S 28 ...
Page 75: ...Model No TC P50GT30 SS Board 1 2 S 29 ...
Page 76: ...Model No TC P50GT30 SS Board 2 2 and SS2 Board S 30 ...
Page 77: ...Model No TC P50GT30 P Board Foil side S 31 ...
Page 78: ...Model No TC P50GT30 P Board Component side S 32 ...
Page 79: ...Model No TC P50GT30 P2 Board S 33 ...
Page 80: ...Model No TC P50GT30 A Board Foil side S 34 ...
Page 81: ...Model No TC P50GT30 A Board Component side S 35 ...
Page 82: ...Model No TC P50GT30 K S and V Board S 36 ...
Page 83: ...Model No TC P50GT30 C1 Board S 37 ...
Page 84: ...Model No TC P50GT30 C2 Board S 38 ...
Page 85: ...Model No TC P50GT30 C3 Board S 39 ...
Page 86: ...Model No TC P50GT30 SC Board Foil side S 40 ...
Page 87: ...Model No TC P50GT30 SC Board Component side S 41 ...
Page 88: ...Model No TC P50GT30 SS Board Foil side S 42 ...
Page 89: ...Model No TC P50GT30 SS Board Component side S 43 ...
Page 90: ...Model No TC P50GT30 SS2 Board S 44 ...
Page 130: ...Model No TC P50GT30 Exploded View 1 S 84 ...
Page 131: ...Model No TC P50GT30 Exploded View 2 S 85 ...
