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 the chassis,the reading should be
between 1M
Ω
and 5.2
Ω
.
When the exposed metal does not have a return path to the chassis, the reading must be
.
Fig. 1
Summary of Contents for SB-WA520EB
Page 18: ...Step 5 Remove the screws from the subwoofer Disassembly of Power Amp unit ...
Page 19: ...Step 6 Remove 2 screws from the Power Amp unit ...
Page 20: ...Step 7 Pull out the Power Amp unit slightly as shown Note Be careful of attach wire at CN506 ...
Page 21: ...Step 8 Release the connector CN506 then pull out the entire Power Amp unit ...
Page 22: ...Steps 9 10 Remove all the screws Step 11 Release the connector CN507 to remove the rear panel ...
Page 23: ... Checking for the Power and AC Inlet P C B Step 12 Remove the screws from the AC Inlet P C B ...
Page 24: ...Steps 13 14 Remove the screws ...
Page 26: ...Step 16 Remove the screws ...
Page 27: ...Step 17 Place the P C B as shown for checking Replacement of the Power IC and Transistor ...
Page 28: ...Step 1 Desolder the Power IC and Transistor terminals Step 2 Remove the screws from the IC501 ...
Page 29: ...Step 3 Remove the screw Step 4 Replacement of the Power IC and Transistor ...
Page 30: ...7 Connection of the Speaker Wiring TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 31: ...8 Block Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 33: ...10 Printed Circuit Board TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 34: ...11 Wiring Connection Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 35: ...12 Illustration of IC s Transistors and Diodes TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 37: ...13 3 Packing Materials Accessories Parts List 13 4 Packaging TOP PREVIOUS NEXT ...
Page 39: ...13 1 1 Cabinet Parts Location TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 51: ...13 4 Packaging TOP PREVIOUS TOP PREVIOUS ...
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