Panasonic SA-PM4E - Before Repair and Adjustment; Protection Circuitry; Safety Part Information

1.3. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C609, C658, C900, C901, C902 & C909 through a 10Ω, 1W 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 230 V, 50 Hz in NO SIGNAL mode should be ~300 mA. (E/EG)
· Current consumption at AC 230-240 V, 50 Hz in NO SIGNAL mode should be ~300 mA. (EB)
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. Safety Part Information
Safety Parts List:
There are special components used in this equipment which are important for safety.These parts are marked by
in the
Schematic Diagrams & Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer’s
specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer.
Table 1
Reference No. Part No. Part Name & Description Remarks
A2 K2CQ2CA00002 AC CORD [M]EG E
A2 K2CT3CA00004 AC CORD [M]EB
L8 G0C101KA0029 AXIAL COIL [M]
L600 G0B371HA0005 LINE FILTER [M]
L800 G0C3R3JA0027 COIL [M]
L801 G0C3R3JA0027 COIL [M]
L900 G0C3R3JA0027 COIL [M]
L901 G0C101JA0027 COIL [M]
L950 J0JBC0000019 CHIP INDUCTOR [M]
LB321 J0JBC0000015 CHIP INDUCTOR [M]
T601 G4CYAYY00142 TRANSFORMER [M]
IP800 K5G251A00008 FUSE PROTECTOR [M]
F1 K5D631BLA012 FUSE [M]
FP300 K5G502A00039 FUSE PROTECTOR [M]
JK600 K2AA2B000011 JK AC INLET [M]
5
SA-PM4E / SA-PM4EB / SA-PM4EG