Panasonic SC-EN38GCS, Руководство по обслуживанию

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1.2. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C501 through a 10
Ω
, 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 230-240 V, 50 Hz in NO SIGNAL mode should be ~300 mA.
1.3. 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.
1.4. 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 K2CQ2CA00007 AC CORD [M]
A2 K2CP2CA00001 AC CORD [M]
JK600 K2AA2B000017 AC INLET [M]
T600 G4CYAYY0 0176 TRANSFORMER [M]
F1 K5D202BLA013 FUSE [M]
L600 ELF15N035AN LINE FILTER [M]
301 RAE0165T-V TRAVERSE UNIT (W/O CD SERVO
P.C.B) [M] (RTL)
FP600 K5G302AA0002 FUSE PROTECTOR [M]
FP841 K5G251A00008 FUSE PROTECTOR [M]
R260 ERD2FCVG470T 47 1/4W [M]
PCB6 REPX0652F TRANSFORMER P.C.B [M] (RTL)
PCB7 REPX0652F AC INLET P.C.B [M] (RTL)
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SC-EN38GCS