1 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C5820 and C5840 through a 10
Ω
, 5W resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 230V, 50 Hz in NO SIGNAL mode (volume min at CD mode) should be ~ 350mA.
2 Protection Circuitry
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.
4
SA-AK330EE
Summary of Contents for SA-AK330EE
Page 8: ...7 Accessories Remote Control FM Antenna AC Cord AM Loop Antenna 8 SA AK330EE ...
Page 9: ...8 Operation Procedures 9 SA AK330EE ...
Page 10: ...10 SA AK330EE ...
Page 57: ...15 Voltage Measurement 57 SA AK330EE ...
Page 58: ...58 SA AK330EE ...
Page 89: ...21 Troubleshooting Guide 89 SA AK330EE ...
Page 91: ...22 1 Deck Mechanism RAA4502 S 22 1 1 Deck Mechanism Parts Location 91 SA AK330EE ...
Page 92: ...92 SA AK330EE ...
Page 95: ...95 SA AK330EE ...
Page 97: ...22 3 1 Cabinet Parts Location 22 3 Cabinet 97 SA AK330EE ...
Page 98: ...98 SA AK330EE ...
Page 108: ...22 6 Packaging 108 SA AK330EE PRT0412 P S J N A E ...