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SB-WA720PP / SB-WA720GCP / SB-WA520GN File this Parts Change Notice with your copy of the Service Manual for : Model No. SB-WA720PP-S ORDER NO. MD0401014C1 Model No. SB-WA720GCP-S ORDER NO. MD0404163C3 Model No. SB-WA520GN-S ORDER NO. MD0403116C3 T.I No. 26326 (For Factory Reference only).
Music Center: SA-HT720 (PC) System : SC-HT720 (PC) Satellite Speakers: SB-HT720 (P) Active Subwoofer: SB-WA720 (PP) 2004 Panasonic AVC Networks Singapore Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Safety Precautions 1.1. GENERAL GUIDELINES 1.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed. 3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards. (This “Safety Precaution”...
1.1.2. LEAKAGE CURRENT HOT CHECK (See Figure 1.) 1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5k , 10 watts resistor, in parallel with a 0.15 capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.
Disconnect AC power, discharge Power Supply Capacitors C546, C547, C548, C549 through a , 1 W 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, 60Hz in NO SIGNAL mode should be ~500 mA .
Notes : - To prevent damage to circuitry, never short-circuit positive (+) and negative (-) speaker wires. - Be sure to connect only positive (Copper) wires to positive (+) terminals and negative (Silver) wires to negative (-) terminals. 6. Disassembly Procedure “ATTENTION SERVICER”...
Contents - Disassembly of the Speaker Unit - Main Component Replacement Procedures 6.1. Disassembly flow chart The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing. To assemble the unit, reverse the steps shown in the chart below. 6.2.
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Step 3: Remove all the screws from the bottom of the speaker unit. Step 4: Remove the screws from the rear panel’s speaker unit guide. Step 5: Remove the screws from the subwoofer.
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Step 6: Remove 2 screws from the Power Amp unit. Step 7: Pull out the Power Amp unit slightly as shown. Step 8: Release the connector CN506 then pull out the entire Power Amp unit.
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Steps 9 & 10: Remove all the screws. Step 11: Release the connector CN507 to remove the rear panel. - Checking for the Power and AC Inlet P.C.B. Step 12: Remove the screws from the AC Inlet P.C.B.
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Steps 13 & 14: Remove the screws. Step 15: Place the Power P.C.B. and the AC Inlet P.C.B. as shown for checking. - Checking for the Transformer P.C.B. Step 16: Remove the screws.
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Step 17: Place the P.C.B. as shown for checking. 6.3. Main Component Replacement Procedures 6.3.1. Replacement of the Power IC and Transistor Step 1: Desolder the Power IC and Transistor terminals. Step 2: Remove the screws from the IC501.
Step 3: Remove the screw. Step 4: Replacement of the Power IC and Transistor. 7. Connection of the Speaker Wiring 8. Block Diagram 9. Schematic Diagram (All schematic diagrams may be modified at any time with the development of the new technology) Note: - The voltage value and waveforms are the reference voltage of this...
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Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturer's specified parts shown in the parts list. Caution ! IC, LSI and VLSI are sensitive to static electricity.
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Furthermore, special parts which have purposes of fire-retardent (resistors), high-quality sound (capacitors), low noise (resistors), etc are used. When replacing any of these components, be sure to use only manufacturer’s specified parts shown in the parts list. - The parenthesized indications in the Remarks columns specify the areas or colour.
Ref. No. Part No. Part Name & Description Remarks CABINET AND CHASSIS RFKHBWA720PP SUBWOOFER ASS’Y RMVX0077-J SPEAKER UNIT GUARD RMQX0088-J EVA PACKING RGKX0255-SJ STAND ORNAMENT RGRX0033A-HJ REAR PANEL REM0072-3 SHE187-6J PCB SUPPORT RMN0203 PCB HOLDER RMRX0047-J LED HOLDER RKAX0018-KJ LEG CUSHION RMC0158-S TR-FIXTURE XTW3+15T...
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AC INLET P.C.B (REPX0430A) CAUTION RISK OF ELECTRIC SHOCK AC VOLTAGE LINE. PLEASE DO NOT TOUCH THIS P.C.B FC501 FC502 (BLU) (BRW) F1 125V 5A T502(SUB TRANSFORMER) JK500 Q516 L500 J500 RLY501 C555 J501 R589 Q519 AC IN R578 C557 C581 120V J502...
SCHEMATIC DIAGRAM-1 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT : +B SIGNAL LINE IC501 C551 IC501 0.01 RSN311W64B-P POWER HIC E501 K4CZ01000027 R501 R513 4.7K R502 C507 18P 4.7K R514 C508 18P R524 120K D501-D502 R506 B0JAPG000019 R516 R526 C510 22P...
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SCHEMATIC DIAGRAM-2 : MAIN SIGNAL LINE : -B SIGNAL LINE POWER CIRCUIT : +B SIGNAL LINE R597 C564 R594 1200P Q513,Q514 R592 KTC3199GRTA R403 100K C565 DC DETECT SWITCH Q514 R599 R591 R593 Q513 6.8K 470K R571 C568 R572 C562 IC502 0.01 3.3K...
SCHEMATIC DIAGRAM-3 : -B SIGNAL LINE : +B SIGNAL LINE C555 R589 35V4.7 Q516 R578 KRC102MTA SYNC SWITCH CN502 R580 PCONT Q517 POWER CIRCUIT R587 D528 KTC2026 2.7K (CP502) ON SYNC B0EAKM000122 VOLTAGE REGULATOR SCHEMATIC SYS6V DIAGRAM-2 C559 HELP 0.01 C556 R588 0.01...
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CN501 TO MAIN UNIT CN503 7..1 CP502 CENTER SPEAKER JK502 SURROUND RIGHT SPEAKER LED P.C.B. SURROUND CN507 LEFT SPEAKER H505B/ FRONT RIGHT W505 SPEAKER SPEAKER FRONT LEFT JK501 SPEAKER WOOFER H505A/W505 SOLDER SIDE SOLDER SIDE POWER P.C.B.
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IC501 RSN311W64B-P POWER HIC POWER CONTROL CIRCUIT POWER CONTROL/PROTECTION CIRCUIT 12(11) (25) (19) D501 D502 Q506 TO MAIN INTERFACE BLOCK SWITCH (JK700) OF SA-HT500GC-S, Q505 (JK300) OF SA-HT700GCS/GC-S SWITCHING SL(R)/SURRL(R) FILTER JK501(JK502) SURROUND SPEAKER CCH/CENTRE FILTER JK502 CENTRE SPEAKER FILTER SUBWOOFER FL(R)/FRONTL(R) FILTER...
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POWER P.C.B(REPX0430A) CAUTION RISK OF ELECTRIC SHOCK AC VOLTAGE LINE. PLEASE DO NOT TOUCH THIS P.C.B J570 CN501 J528 J581 R543 R544 CP502 E500 R539 TO MAIN UNIT R540 D508 Q556 Q513 R583 J567 Q558 R542 J504 R566 R541 R605 J533 R582 Q514...