Panasonic SA-PM45PC, Руководство по обслуживанию

Страница: 5 / 76

1.2. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C501, C502, C503, C602, C910, C911, C915 and C923 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 120V, 60 Hz in NO SIGNAL mode (volume min) should be ~150 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. Caution For Fuse Replacement
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 K2CB2CB00018 AC CORD [M]
F1 K5D162APA008 FUSE [M]
JK600 K2AB2B000007 JK AC INLET [M]
T600 G4C2AAD00004 SUB TRANSFORMER [M]
T601 G4CYAYY00153 TRANSFORMER [M]
L600 G0B371HA0005 LINE FILTER [M]
Z600 ERZVA5Z471 ZENER [M]
RL600 K6B1AEA00015 POWER RELAY [M]
FP352 K5G502A00039 FUSE PROTECTOR [M]
FP601 K5G502A00039 FUSE PROTECTOR [M]
FP950 K5G102AA0002 FUSE PROTECTOR [M]
R609 ERC12UGK335D 3.3M 1/2W [M]
5
SA-PM45PC