Panasonic SC-HTR310P, Руководство по обслуживанию

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1.2. Before Repair and Adjustment
Disconnect AC power, discharge ac capacitors C5712, C5808, C5805, C5813, C5816, C5824, C5517, C5516, C5508, C5509,
C5510, C5511, C5512 and C5513 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 (at volume minimum) should be 200 ~ 800 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
8 REXX0640-J BLACK WIRE [M]
9 REXX0641-J RED WIRE [M]
14 RKMX0141B-S1 TOP CABINET [M]
15 RGR0383D-C REAR PANEL [M]
A2 K2CB2CB00021 AC CORD [M]
A6 RFA2903 TOP GLASS ACCESSORY [M]
A8 RXQ1607 PREPARED GLASS DOOR ASSY L [M]
A9 RXQ1608 PREPARED GLASS DOOR ASSY R [M]
DZ5701 ERZV10V511CS ZENER [M]
L5701 ELF15N035AN LINE FILTER [M]
L5702 ELF22V020A LINE FILTER [M]
T701 G4D1A0000117 SW TRANSFORMER [M]
T5701 ETS42BM1A1AC TRANSFORMER [M]
T5751 ETS19AB281AG BACKUP TRANSFORMER [M]
PC5701 B3PBA0000402 PHOTO COUPLER [M]
PC5720 B3PBA0000402 PHOTO COUPLER [M]
PC5799 B3PBA0000402 PHOTO COUPLER [M]
F1 K5D802APA008 FUSE [M]
IP701 K5H5012A0010 IC PROTECTOR [M]
IP702 K5H302100004 IC PROTECTOR [M]
TH5701 D4CAA2R20001 THERMISTOR [M]
TH5860 D4CC11040013 THERMISTOR [M]
P5701 K2AB2B000011 AC INLET [M]
PCB5 REPX0676N SMPS P.C.B. / AC INLET P.C.B. [M] (RTL)
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SC-HTR310P