4 Protection Circuitry
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The protection circuitry may have operated if either of the following conditions are noticed:
●
No sound is heard when the power is turned on.
●
Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative
speaker connection wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the
amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note :
When the protection circuitry functions, the unit will not operate unless the power is first turned off
and then on again.
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Summary of Contents for SB-WA330E
Page 18: ...Step 9 Remove all the screws Step 10 Remove the Speaker ...
Page 19: ...Step 11 12 Remove all the screws ...
Page 21: ...Step 17 Place the Power PCB as shown for checking ...
Page 22: ...Checking for AC Inlet PCB TOP PREVIOUS NEXT ...
Page 24: ...6 2 1 Replacement of the Power IC TOP PREVIOUS NEXT Step 1 2 Remove all the screws ...
Page 25: ...Step 3 Desolder the Power IC terminal and replace the component TOP PREVIOUS NEXT ...
Page 26: ...7 Connection of the Speaker Wiring TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 27: ...8 Block Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 29: ...10 Printed Circuit Board TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 30: ...11 Wiring Connection Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 31: ...12 Illustration of IC s Transistors and Diodes TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 35: ...13 1 1 Cabinet Parts Location TOP PREVIOUS NEXT TOP PREVIOUS NEXT ...
Page 47: ...13 4 Packaging TOP PREVIOUS TOP PREVIOUS ...
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