Panasonic DoubleFeature PV-D4734S, Service Manual

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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 1.5 k , 10 W resistor, in parallel with a 0.15 F capacitor,
between each exposed metallic part on the set and a good earth
ground, as shown in
Figure 1 .
3. Use an AC voltmeter, with 1 k /V 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 V 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
mA. In case a measurement is outside of the limits specified, there is a
possibility of a shock hazard, andthe equipment should be repaired
and rechecked before it is returned to the customer.
Figure 1
1.1. LASER PRODUCT
CLASS I LASER PRODUCT
- This equipment is certified to comply with DHHS Rules 21 CFR Chapter
1, Subchapter J in effect as of date of manufacture. (Only for U.S.A.)
This equipment is classified as a Class I (Class 1) level LASER Product and there is no hazardous
LASER radiation with the safety protection.
Caution:
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