Panasonic sb wa 1000 e service manual
This is the 42 pages manual for panasonic sb wa 1000 e service manual.
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Extracted text from panasonic sb wa 1000 e service manual (Ocr-read)
Page 1
1.1. General Guidelines 3 1.2. Before Repair and Adjustment 4 1.3. Protection Circuitry 4 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 5 3 AboutLead-Free Solder (PbF) 6 3.1. Service caution based on legal restrictions 6 4 Accessory 7 5 Operating Instructions Procedures 8 5.1. Subwoofer operation 8 6 Assembling and Disassembling 11 6.1. Caution 11 6.2. Disassembly flow chart 11 6.3. Disassembly of Front net frame unit 12 6.4. Disassembly ofWoofer (1) 12 6.5. Disassembly of Rear net frame unit 13 6.6. Disassembly ofWoofer (2) 13 6.7. Disassembly and checking of Level control P.C.B and LED P.C.B 14 6.8. Disassembly of the Stand base 16 6.9. Disassembly of Amp unit 16 6.10. Disassembly of Rear panel assembly 18 6.11. Disassembly of Fan unit 18 6.12. Disassembly and checking of AC inlet P.C.B, Power P.C.B and Transformer P.C.B 19 6.13. Replacement of the Power IC 20 7 Voltage Measurement and Waveform Chart 21 7.1. Voltage Measurement 21 7.2. Waveform Chart 22 8 Connection of the Speaker wiring 23 9 Wiring Connection Diagram 24 10 Block Diagram 25 11 Notes Of Schematic Diagram 27 12 Schematic Diagram 29 12.1. Power Circuit 29 12.2. Level Control Circuit, Transformer Circuit and LED Circuit 30 12.3. AC Inlet Circuit 31 13 Printed Circuit Board 33 13.1. Power P.C.B 33 13.2. Level Control P.C.B, LED P.C.B, Transformer P.C.B and AC Inlet P.C.B 34 14 Illustration of IC's, Transistors and Diodes 35 15 Exploded view 36 15.1. Cabinet Parts Location 36 15.2. Packaging 38 16 Replacement Parts List 39 2 SB-WA1000E
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1 Safety Precautions 1.1. General Guidelines 1. Whenservicing, 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, insulation papers shields are properly installe d. 3. After servicing, check for leakage current checks to prevent from beingexpose d 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. Using anohmmeter measure the resistance value, between the jumpered AC plug and each exposed metalliccabine t part on the equipment such as screwheads, connectors, control shafts, etc.When the exposedmetallic part has a return path to the chassis, the reading should be between 1MΩand 5.2Ω. When theexpose d 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 isolatio n transformer for this check. 2. Conne ct a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF capacitors, between each expose d 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 expose d 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 outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned to the customer. 3 SB-WA1000E