Panasonic PVD734S - DVD/VCR DECK, Руководство по обслуживанию

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When removing springs or spring mounted parts from the tuner, tuner cluster or chassis,
shatterproof goggles must be worn. Keep others without shatterproof goggles away.
Before returning the receiver to the user, perform the following safety checks:
1. Inspect all lead dress to make certain that leads are not pinched or
that hardware is not lodged between the chassis and other metal
parts in the receiver.
2. Replace all protective devices such as nonmetallic control knobs,
insulating fishpapers, cabinet backs, adjustment and compartment
covers or shields, isolation resistor-capacitor networks,
mechanical insulators, etc.
3. To be sure that no shock hazard exists, a check for the presence
of leakage current should be made at each exposed metal part
having a return path to the chassis (antenna, cabinet metal, screw
heads, knobs and/or shafts, escutcheon,etc.) in the following
manner.
Plug the AC line cord directly into a 120V AC receptacle.
(Do not use an Isolation Transformer during these checks.) All checks must be repeated with the
AC line cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used
only for the purpose of completing these checks.)
If available, measure current using an accurate leakage current tester. Any reading of 0.35mA or
more is excessive and indicates a potential shock hazard which must be corrected before
returning the receiver to the owner.
If a reliable leakage current tester is not available, this alternate method of measurement should
be used.Using two clip leads, connect a 1500 ohm, 10 watt resistor paralleled by a 0.15 F
capacitor in series with a known earth ground,such as a water pipe or conduit and the metal part
to be checked. Use a VTVM orVOM with 1000 ohms per volt, or higher, sensitivity to measure this
AC voltage drop across the resistor. Any reading of 0.35 volt RMS or more is excessive and
indicatesa potential shock hazard which must be corrected before returning the receiver to the
owner.
3. IMPORTANT SAFEGUARDS
4. TAPE REMOVAL METHOD AT NO POWER SUPPLY
1. Remove the Top Cabinet, Front Cabinet and DVD Block. (Refer to
item 1 of the DISASSEMBLY INSTRUCTIONS.)
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