1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, ensure that all the protective devices such as insulation barriers and insulation papers shields are properly
installed.
3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.
(This “Safety Precaution” is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer’s recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the
customer from being exposed to a shock hazard.
1.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Using an ohmmeter measure the resistance value, 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 the
chassis, the reading should be between 1M
Ω
and 5.2M
Ω
.
When the exposed metal does not have a return path to the chassis, the reading must be
.
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
Ω
, 10 watts resistor, in parallel with a 0.15µF capacitor, 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.
6. The potential at any point should not exceed 0.75 volts 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 milliamp. Should the measurement is out of the limits
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
Fig. 1
4
SC-EN35P / SC-EN35PC
Summary of Contents for SC-EN35P
Page 10: ...6 Accessories Remote Control AC Cord FM AM Antenna 10 SC EN35P SC EN35PC ...
Page 12: ...7 3 Connection 12 SC EN35P SC EN35PC ...
Page 13: ...7 4 Using the XM Satellite Radio 13 SC EN35P SC EN35PC ...
Page 32: ...11 1 Check and Repair of CD Servo P C B 32 SC EN35P SC EN35PC ...
Page 35: ...12 2 CD Servo P C B 12 3 Motor P C B 12 4 Panel P C B 12 5 Tuner P C B 35 SC EN35P SC EN35PC ...
Page 36: ...12 6 Waveform Chart 36 SC EN35P SC EN35PC ...
Page 38: ...SC EN35P SC EN35PC 38 ...
Page 44: ...44 SC EN35P SC EN35PC ...
Page 54: ...SC EN35P SC EN35PC 54 ...
Page 61: ...20 Exploded Views 61 SC EN35P SC EN35PC ...
Page 62: ...62 SC EN35P SC EN35PC ...
Page 63: ...20 1 Cabinet Parts Location SC EN35P SC EN35PC 63 ...
Page 64: ...SC EN35P SC EN35PC 64 ...
Page 65: ...20 2 Packaging SC EN35P SC EN35PC 65 ...
Page 66: ...SC EN35P SC EN35PC 66 ...
