Read Panasonic TH-98LQ70U / TH-98LQ70W / TH-98LQ70C Service Manual online
2 Measure the resistance value, with an ohm meter, between the jumpered AC plug and each exposed metallic
be more than 5MΩ.
4 Check each exposed metallic part, and measure the voltage at each point.
5 Reverse the AC plug in the AC outlet repeat each of the above measurements.
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.
1 Pb free solder has a higher melting point than standard solder; Typically the melting point is 50–70℉ (30-40℃) higher.
are called Electrostatically sensitive (ED) Devices. Examples of typical ES devices are integrated circuits and some
field-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce
the incidence of component damage caused by static electricity.
1 Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any
Alternatively, obtain and wear a commercially available discharging wrist trap device, which should be removed for
potential shock reasons prior to applying power to the unit under test.
4 Use only an anti-static solder removal device classified as “anti-static” can generate electrical charges sufficient
6 Do not remove a replacement ES device from its protective package until immediately before you are ready
aluminum foil or comparable conductive material).
CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
static electricity sufficient to damage an ES device).
2 When using a picture tube test jig for service, ensure that jig is capable of handling 10kV without causing X-Radiation.
Note: It is important to use an accurate periodically calibrated high voltage meter.
3 Measure the High Voltage. The meter (electric type) reading should indicate 2.5kV, ±0.15kV. If the meter indication is
To prevent an X-Radiation possibility, it is essential to use the specified picture tube.