Toshiba 52XV645U Service Manual page 4

9. NEVER remodel the product in any way. Remodeling can result in improper operation,
malfunction, or electrical leakage and flame, which may be hazardous.
10. Always perform an AC leakage current checking on the exposed metallic parts of the
cabinet such as antennas, terminals, screw heads, metal overlays, control shafts and etc.
to be sure that the set is safe to operate without any dangerous of electrical shocks before
returning the set to the customer.
11. The leakage current checking. (After completing the work, measure the leakage current to
prevent an electrical shock.)
Plug the AC line cord directly into a 120V AC outlet. Do not use an isolation transformer for
this check.
Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner.
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15 µF, AC type capacitor, between a
known good earth ground (water pipe, conduit, etc.) and the exposed metallic parts, one at a
time. Measure the AC voltage across the combination of 1500 ohm resistor and 0.15 µF
capacitor. Reverse the AC plug at the AC outlet and repeat AC voltage measurements for
each exposed metallic part. Voltage measured must not exceed 0.3 volts rms. This
corresponds to 0.2 milliamp. AC. Any value exceeding this limit constitutes a potential shock
hazard and must be corrected immediately.