1.3.
Before Repair and Adjustment
Disconnect AC power to discharge the AC Capacitors (C5700, C5701, C5702, C5703, C5704, C5705, C5706, C5707, C5708)
through a 10
Ω
, 10 W resistor to ground.
Caution:
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~127 V/60 Hz in Power ON, FM Tuner, (No Signal at volume minimal) should be ~
850mA.
1.4.
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.
1.5.
Caution For Fuse Replacement
Summary of Contents for SA-MAX500LMK
Page 14: ...5 General Introduction 5 1 Media Information ...
Page 26: ...9 1 2 Main P C B Front Side Fig 2 Main P C B Front Side Regulator Circuit IC2014 ...
Page 27: ...Fig 3 Main P C B Back Side ...
Page 30: ...9 3 D Amp IC Operation Control MAX500 ...
Page 34: ......
Page 36: ...10 3 Main Components and P C B Locations SMPS P C B ...
Page 84: ...14 3 FL Display Circuit MAX500 ...
Page 85: ...14 4 Volume Circuit MAX500 ...
Page 86: ...MAX500 14 5 Control USB Circuit ...
Page 87: ...14 7 Remote Sensor MAX500 ...
Page 88: ...MAX500 ...
Page 89: ... Jog Board MAX500 ...
Page 90: ...Internal Fan MAX500 ...
Page 124: ...17 1 3 Mechanical Replacement Part List ...