Panasonic SHFX71 - WIRELESS SYSTEM, Руководство по обслуживанию

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1.2. Before Repair and Adjustment
This model uses switching mode power supply (SMPS) module to provide the necessary voltages for the Digital Receiver
Caution : 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 110 V to 240 V, at 50/60 Hz in NO SIGNAL mode (at volume minimum) should be ~200 mA. (GC
only)
• Current consumption at AC 220 V to 240 V, at 50 Hz in NO SIGNAL mode (at volume minimum) should be ~200 mA. (GN only)
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, Exploded View & 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
Safety Ref. No. Part No. Part Name & Description Remarks
11 RGNX1088-K NAME PLATE STICKER GN
11 RGNX1086-K NAME PLATE STICKER GC
18 N0AE3GJ00001 SMPS MODULE P.C.B.
A1 K2CJ2DA00010 AC CORD GN
A1 K2CP2CA00001 AC CORD /W TAG GC
A1 K2CQ2CA00007 AC CORD (2PIN) GC
A1 K2CZ3YY00005 AC CORD (3PIN) GC
A2 RQTX1132-G O/I BOOK (Sp,Cn,Ru,Ur) GC
A2 RQTX1140-B O/I BOOK (En)
A5 RFAX1012D TRANSMITTER UNIT GC
A5 RFAX1012E TRANSMITTER UNIT GN
A7 J0KG00000037 FERRITE CORE
PCB1 REPX0771B DIGITAL RECEIVER MODULE (RX) P.C.B.