Panasonic PV-C923 OmniVision, Руководство по обслуживанию

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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.
2. TAPE REMOVAL METHOD AT NO POWER SUPPLY
1. Remove the VCR block from the main unit.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
2. Remove the screw of the Deck Chassis and remove the Loading
Motor.
3. Rotate the Pinch Roller Cam in the direction of the arrow by hand
to slacken the Video Tape.
4. Rotate the Clutch Ass'y either of the derections to wind the Video
Tape in the Cassette Case.
5. Repeat the above step 3~4. Then take out the Video Cassette from
the Deck Chassis. Be careful not to scratch on the tape.
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