Panasonic SC-EN38P, Service Manual

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1.2. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C501 and C502 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 120 V, 60 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 K2CB2CB00021 AC CORD [M]
JK600 K2AB2B000007 AC INLET [M]
T600 G4CYBYY0 0016 TRANSFORMER [M]
F1 K5D202APA008 FUSE [M]
L600 ELF15N035AN LINE FILTER [M]
FP841 K5G251A00008 FUSE PROTECTOR [M]
FP600 K5G302AA0002 FUSE PROTECTOR [M]
R260 ERD2FCVG470T 47 1/4W [M]
301 RAE0165T-V TRAVERSE (W/O CD SERVO P. C. B.) [M]
PCB6 REPV0652A TRANSFORMER P.C.B. [M] (RTL)
1.5. Caution for fuse replacement
4
SC-EN38P / SC-EN38PC