damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as
insulation barriers, insulation papers shields are properly installed.
3. After servicing, make the following leakage current checks to
prevent the customer from being exposed to shock hazards.
1.1.1. Leakage current cold check
1. Unplug the AC cord and connect a jumper between the two prongs
on the plug.
2. Measure the resistance value, with an ohmmeter, between the
jumpered AC plug and each exposed metallic cabinet part on the
equipment such as screwheads, connectors, control shafts, etc.
When the exposed metallic part has a return path to thechassis,
the reading should be between 1M and 5.2M . / When the
exposed metal does not have a return path to the chassis, the
reading must be .
Figure 1
1.1.2. 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 1.5k , 10 watts resistor, in parallel with a 0.15 F
capacitors, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in
Figure 1
.
3. Use an AC voltmeter, with 1000 ohms/volt 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.
3
Содержание DMR-E85HEB
Страница 35: ...11 2 Checking and Repairing of Main P C B 35 ...
Страница 36: ...11 3 Checking and Repairing of Digital P C B 36 ...
Страница 37: ...11 4 Checking and Repairing of DVD RAM Drive 37 ...
Страница 38: ...11 5 Checking and Repairing of HDD 38 ...
Страница 50: ...19 2 Casing Parts Mechanism Section 2 50 ...
Страница 51: ...19 3 Packing Accessories Section 51 ...
Страница 56: ...C3030 31 ECJ1VB1H103K 50V 0 01U 2 56 ...
Страница 61: ...JK7501 K1U415B00001 JACK AV3 1 61 ...
Страница 70: ...C7323 ECJ1VC1H102J 50V 1000P 1 70 ...
Страница 72: ...C3933 ECA1CAK101XB 16V 100U 1 72 ...
Страница 75: ...C4414 15 ECJ0EF1C104Z 16V 0 1U 2 75 ...
Страница 81: ...81 ...
Страница 83: ...D114 GPP20J DIODE 1 83 ...
Страница 96: ...1 A B C D E 2 3 4 5 VIF Decoder P C B DMR E85HEB VIF Decoder P C B VEP07A71M ...
Страница 161: ...1 A B C D 2 3 4 5 Nicam Decoder P C B DMR E85HEB EG Nicam Decoder P C B VEP07A51A ...
Страница 170: ...1 A B C D 2 3 4 5 6 7 8 9 FRONT R P C B DMR E85HEB EG FRONT R P C B REP3713B ...
Страница 172: ...Ref No MODE E C B REC 0 3 5 0 PLAY 0 3 5 0 STOP 0 3 5 0 QR7801 ...