Panasonic SA-PMX70 - Before Repair and Adjustment; Protection Circuitry; Caution for Fuse Replacement; Safety Part Information

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1.2. Before Repair and Adjustment
Disconnect AC power & discharge AC Capacitors (C5700, C5701, C5702, C5705 and C5706) through a 10W, 1W resistor to
ground.
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 during AC 240V, at 50Hz in NO SIGNAL mode (at volume minimum in FM mode) should be ~200 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, 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.
Safety Ref. No. Part No. Part Name & Description Remarks
12 RGR0474A-A3 REAR CABINET
16 RKM0766-K TOP CABINET K
16 RKM0766-S TOP CABINET S
23 RMQ2463 SMPS PC SHEET
301 RAE1047Z-V TRAVERSE ASS’Y
A2 K2CQ2YY00119 AC CORD
A3 RQT9985-D O/I BOOK (Ge/It/Fr/Du/Da/Sw/Fi)
A3 RQT9987-R O/I BOOK (Po/Cz/Sp)
A3 RQT9988-B O/I BOOK (En)
PCB6 REP5160AA SMPS P.C.B (RTL)
DZ5701 ERZV10V511CS SURGE ABSORBER (E.S.D)
L5704 G0B203G00005 LINE FILTER
L5713 G0B922G00002 LINE FILTER
T5701 G4DYZ0000080 SWITCHING TRANSFORMER
PC5721 B3PBA0000579 PHOTO COUPLER
PC5761 B3PBA0000579 PHOTO COUPLER
F1 K5G312Y00007 FUSE
P5701 K2AA2B000011 AC INLET
R5700 D0GF474JA048 470K 1/4W
R5701 D0GF474JA048 470K 1/4W
R5710 D0GF474JA048 470K 1/4W
C5700 F1BAF1020020 1000pF
C5701 F0CAF224A105 0.22uF
C5702 F0CAF224A105 0.22uF
C5705 F1BAF1020020 1000pF
C5706 F1BAF1020020 1000pF