Before Repair And Adjustment; Protection Circuitry - Panasonic SA-PM17E Service Manual

1. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C506, C507, C508, C576, C577, C587,
C588, C615 through a 10
screw driver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid over current.
Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode should be ~300 mA.

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.
- 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.
General
Power supply
Power consumption
Dimensions (W x H x D)
Mass
Power consumption in standby
mode
System: SC-PM17(E)
System: SC-PM17(EB)
System: SC-PM17(EG)
Notes:
1. Specifications are subject to change without notice. / Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
, 5 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a
AC 230 V, 50 Hz
179 x 241 x 375 mm
Approx. 0.7 W
Music Center: SA-PM17(E)
Speaker: SB-PM17(P)
Music Center: SA-PM17(EB)
Speaker: SB-PM17(P)
Music Center: SA-PM17(EG)
Speaker: SB-PM17(EG)
3
100 W
5.6 kg