Panasonic SB-WA840 Service Manual Download Page 17

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10 Schematic Diagram

10.1. Power Circuit

R501

4.7K

CN501

CN507

D502

D501

Q501

Q502

R546

R504

15K

D501-D502

B0JAPG000019

E501

K4CZ01000027

Q520

B1GCCFJJ0016

INTERFACE SWITCH

IC501

R502

4.7K

R506

15K

R505

15K

R503

15K

FLin

IN GND

FRin

SUBin

Cin

-VD

+VD

SRin

SLin

RELA

-Di SENS

+Di SENS

IH DET

DISP HMUT

SL_O

SR_O

GND

AC IN

C_O

-VCC LOW

+VCC LOW

SUB_O

-VCC HI

+VCC HI

FR_O

FL_O

C501

1000P

C503

1000P

C506 1000P

C505 1000P

R513

56K

C507 18P

C508 18P

R514 56K

R516 56K

C510 22P

R515 56K

C509 22P

R517 56K

C511 22P

R518 56K

C512 22P

R509

4.7K

R510 4.7K

R507

3.9K

R511

15K

R512

15K

R508 3.9K

C516

0.01

C515

0.01

C517

0.01

R402

Q503

R532

4.7K

R523 20K

R524

120K

R526

120K

R527

120K

C513

0.047

R519

820K

R530 1

R531 1

R521 10K

R522 27K

R545

220K

Q506

B1GCCFJJ0016

INTERFACE SWITCH

Q505

B1AACF000117

SWITCHING

Q501-Q502

B1AACF000117

SWITCH

Q503

B1AACF000117

SWITCH

IC501

RSN311W64D-P

POWER HIC

C551

0.01

R525

150K

D558,D559

B0AACK000004

D555

B0AACK000004

D562

B0AACK000004

: +B SIGNAL LINE

: MAIN SIGNAL LINE

: -B SIGNAL LINE

TO FAN

MAIN CIRCUIT

(JK2000) OF

SA-HT840EE-S

R583

100

R584

47K

D559

D558

R582

220K

C576

50V 10P

C577

16V 10

R603

10K

C647

6.3V 470

D560

B0AACK000004

R606 22

D557

B0EAKM0001

C575

0.01

Q555

2SD0592ARA

FAN MOTOR DRIVE

Q556

B1ACCF000094

FAN MOTOR DRIVE

Q554

B1ACCF000094

FAN MOTOR DRIVE

Q554

C574

0.01

D556

B0BA01100004

C570

25V 330

R564

220K

R563

R602

4.7K

Q552

B1ACCF000094

FAN MOTOR DRIVE

Q553

2SD0592ARA

FAN MOTOR DRIVE

Q552

R559

10K

R558

100K

C578

0.01

C579

0.01

R604

2.2M

R562

4.7K

R581

6.8K

Q553

Q557

C580

50V 2.2

R529 22K

Q556

R520 22K

C514 6.3V100

R528 150K

D508

B0AACK000004

20 19

14 13

Q557

2SD0592ARA

FAN MOTOR DRIVE

C504 1000P

C502 000P

SCHEMATIC DIAGRAM-1

POWER CIRCUIT

AC1

DC_DET

AC2

SYS6V

HP_CNT

D.GND

SUB+B

A.GND

PCONT

SYNC

AC2

AC1

Fan Control

D503

MA2C700A0F

D504

B0AACK000004

C529 0.1

R549 3.9K

R547

390K

C534

50V33

R548

330K

SB-WA840EE

Summary of Contents for SB-WA840

Page 1: ...Safety Precautions 3 1 1 GENERAL GUIDELINES 3 2 Before Repair and Adjustment 4 2005 Matsushita Electric Industrial Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law SB WA840EE Colour S Silver Type Note Specifications are subject to change without notice Mass and dimensions are approximate n System SC HT840 EE Music Center SA HT840 EE Satellite Speakers SB HT840...

Page 2: ...Notes of Schematic Diagram 16 10 Schematic Diagram 17 10 1 Power Circuit 17 10 2 Transformer Circuit and AC Inlet Circuit 19 11 Printed Circuit Board 20 11 1 Power P C B 20 11 2 AC Inlet P C B and Transformer P C B 22 12 Wiring Connection Diagram 23 13 Illustration of ICs Transistors and Diodes 24 14 Parts Location and Replacement Parts List 25 14 1 Cabinet 26 14 2 Electrical Parts List 29 14 3 Pa...

Page 3: ...s not have a return path to the chassis the reading must be Fig 1 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 5kΩ 10 watts resistor in parallel with a 0 15µF capacitors between each exposed metallic part on the set and a good earth ground such as a water pipe as shown in Figure 1 3 Use ...

Page 4: ...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 4 Handling the Lead free Solder 4 1 About lead free solder PbF Distinction of PbF P...

Page 5: ... be 4Ω Be sure to connect the cable from the right speaker to the right terminal and the cable from the left speaker to the left terminal 1 Strip off the outer covering and twist the center conductor Make sure the bare ends of the wires are not unravelled If they are twist them tight again 2 Insert the wire to the rear panel of the unit and close the lever 5 SB WA840EE ...

Page 6: ...om the following index when checks or replacement are required Disassembly of the Front Panel Unit Disassembly of the Woofer 1 Disassembly of the Woofer 2 Disassembly of the Power Amp Unit Disassembly of the Rear Panel and Fan Unit Disassembly and checking of the AC Inlet P C B Power P C B and Transformer P C B Replacement of Power IC and Transistor 6 1 Disassembly flow chart The following chart i...

Page 7: ...6 1 2 Disassembly of Rear Assembly 7 SB WA840EE ...

Page 8: ... wood chip in between the Front Panel Unit and the steel ruler as arrow shown Step 3 Use the screwdriver to slightly lift up the Front Panel Unit as arrow shown Note Be careful with the bosses which are glued to the Subwoofer Cabinet Assembly Step 4 Remove the Front Panel Unit from the Subwoofer Cabinet Assembly 6 2 Disassembly of the Speaker Unit and Checking of the P C B 8 SB WA840EE ...

Page 9: ...ace the Front Panel Unit firmly back to the cabinet 6 2 2 Disassembly of the Woofer 1 Follow Step 1 to Step 4 described in section 6 2 1 Step 1 Remove 4 screws from the Woofer 1 Step 2 Remove the Woofer 1 by detaching the and wires 6 2 3 Disassembly of the Woofer 2 Follow Step 1 to Step 4 described in section 6 2 1 9 SB WA840EE ...

Page 10: ...2 Step 2 Remove the Woofer 2 by detaching the and wires 6 2 4 Disassembly of the Power Amp Unit Step 1 Lay the speaker unit as shown Remove 6 screws from the bottom of the woofer unit Step 2 Remove 3 screws from the rear panel 10 SB WA840EE ...

Page 11: ...ll out the entire Power Amp Unit 6 2 5 Disassembly of the Rear Panel and Fan Unit Follow Step 1 to Step 5 described in section 6 2 4 Step 1 2 Remove 7 screws from the rear panel Step 3 Disconnect the connector CN507 to detach the rear panel Step 4 Remove 4 screws from the rear panel 11 SB WA840EE ...

Page 12: ...escribed in section 6 2 4 Follow Step 1 to Step 3 described in section 6 2 5 Step 1 Remove the P C B support by pushing the claws as arrow shown Step 2 Disconnect the connector CN502 Step 3 Lift up the AC Inlet P C B as arrow shown Step 4 5 Remove 6 screws Step 6 Remove 4 screws Step 7 Connect back the connector CP502 between Power and AC Inlet P C B for checking 12 SB WA840EE ...

Page 13: ...d in section 6 2 4 Follow Step 1 to Step 3 described in section 6 2 5 Step 1 Desolder the Power IC and Transistor terminal Step 2 Remove 2 screws and Power IC501 Step 3 Remove the screw and Transistor holder Step 4 Detach the Power IC and Transistor from Heat sink 13 SB WA840EE ...

Page 14: ... 6 10 5 0 0 67 6 STANDBY 0 0 16 8 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 0 Ref No MODE 21 22 23 24 25 26 CD PLAY 67 5 0 0 0 0 0 STANDBY 0 4 0 0 0 0 0 Ref No MODE E C B E C B 1 2 3 E C B E C B CD PLAY 0 5 2 0 0 5 2 0 0 0 1 5 0 0 8 0 0 8 0 0 8 STANDBY 0 0 7 0 0 0 7 0 0 0 0 0 0 3 0 0 3 0 0 3 Ref No MODE E C B E C B E C B E C B E C B CD PLAY 5 2 33 5 5 6 11 3 33 5 11 9 0 1 5 0 0 11 3 0 2 11 3 5 0 11 3 S...

Page 15: ...Q517 VOLTAGE REGULATOR F1 Z501 Q501 Q502 SWITCH DC_DET Q520 INTERFACE SWITCH Q511 HP_CNT Q515 Q519 DCDET SWITCH VOLTAGE REGULATOR D511 D512 D516 D518 T501 T502 D508 AC2 AC1 TO MAIN BLOCK JK2000 OF SA HT840EE S FL1 FL2 B Q512 VOLTAGE REGULATOR E500 D513 D515 D517 D527 D530 POWER HIC SIGNAL LINES IC501 RSN311W64D P JK500 AC INLET RLY501 POWER TRANSFORMER SUB TRANSFORMER JK502 CENTRE SPEAKER CN506 SU...

Page 16: ... 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 Secondary trouble can be prevented b...

Page 17: ... D555 B0AACK000004 D562 B0AACK000004 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 2 4 6 8 9 7 5 3 1 1 2 B SIGNAL LINE MAIN SIGNAL LINE B SIGNAL LINE TO FAN TO MAIN CIRCUIT JK2000 OF SA HT840EE S R583 100 R584 47K D559 D558 R582 220K C576 50V 10P C577 16V 10 R603 10K C647 6 3V 470 D560 B0AACK000004 R606 22 D557 B0EAKM000117 C575 0 01 Q555 Q555 2SD0592ARA FAN MOTOR DRIVE Q556 B1ACCF000094 FAN MOT...

Page 18: ...9K D509 SRLch FRch FLch PCONT GND SYNC SYS6V SUB B R571 1 8K D517 B0HARM000017 D512 B0HARM000017 D511 B0HARM000017 D518 B0HARM000017 D516 B0EAKM000122 D514 B0HARM000017 D513 B0HARM000017 C553 0 1 C554 0 1 D515 B0EAKM000122 D515 R621 10 R622 10 R623 10 R624 10 R625 10 L501 0 7µH L502 0 7µH L503 0 7µH L504 0 7µH L505 0 7µH C569 0 047 FP1 5A L501 L505 G0AR76Y00001 HELP 2 4 6 7 5 3 1 TO AC INLET CIRCU...

Page 19: ...CF000117 DC DET SWITCH D528 D527 RLY501 K6B1AEA00003 Z501 ERZV10V511CS JK500 L500 ELF15N035AN W1 W2 R401 220K R590 1K Q515 Q519 T501 G4C7AGK00005 D527 D530 B0EAKM000122 D529 D525 B0BA6R600008 D530 T502 G4C2AAJ00005 GND 12 11 10 2 4 6 8 9 7 5 3 1 2 4 6 7 5 3 1 SCHEMATIC DIAGRAM 3 TO POWER CIRCUIT CN503 ON SCHEMATIC DIAGRAM 2 TRANSFORMER CIRCUIT B SIGNAL LINE B SIGNAL LINE TO POWER CIRCUIT CP502 ON ...

Page 20: ...96 J595 J594 J593 J538 J577 J532 J598 J591 R625 R622 J570 J528 R624 J536 J597 J410 R535 R565 R583 R581 R536 C522 C532 C531 C530 C519 C520 C518 C521 C569 R538 R530 R531 R533 R534 R537 Q D502 CN506 CN507 CN501 IC501 C576 JK501 JK502 J626 J501 D501 C513 R621 R623 CP502 R577 D516 J581 J627 J502 E500 C533 C550 J573 J539 J572 J571 J534 J521 J568 C577 R522 R521 J592 C523 J512 L503 L504 L502 L505 L501 C52...

Page 21: ...505 C545 D561 D566 D565 D518 J588 J506 J579 J565 J576 J511 J532 J564 J510 J598 97 J541 J559 J516 J585 J558 J583 J584 J586 J587 J544 J530 J520 J549 J552 J542 J566 J535 R565 R582 R583 R581 R584 R603 R402 R558 D562 D557 D560 D556 D555 D509 C553 C554 Q555 Q557 C574 C579 C575 Q554 Q553 C578 Q511 Q512 C573 FP1 5A R563 R606 R561 R610 R609 R569 Q556 D510 D502 C546 D511 C516 C515 C647 IC501 C576 D501 E501 ...

Page 22: ...6008 R401 J6006 J6005 D500 R579 J6009 R580 C559 D528 R590 Q519 Q515 Q516 D527 R589 R578 C555 C557 Q517 D525 R587 C556 T502 BACK UP TRANSFORMER C558 R588 J6001 J6002 J6003 J6004 D530 D529 FC501 FC502 W2 BLU W1 BRW J6014 T501 POWER TRANSFORMER W1 BRW W2 BLU J6011 H500 W500 F1 250V 2A 230V 50Hz AC IN SECONDARY PRIMARY 4 3 2 1 7 6 5 4 3 2 1 3 1 2 5 4 1 2 3 4 5 6 7 8 9 10 11 12 E E E C B C B C B C B E ...

Page 23: ...RANSFORMER P C B SPEAKER WOOFER 25 1 24 2 CN501 JK502 JK501 2 1 1 2 3 CN506 CN507 7 1 CP502 CN503 4 FAN W2 BLU W1 BRW PbF PbF TO MAIN UNIT CENTER SPEAKER SURROUND RIGHT SPEAKER FRONT RIGHT SPEAKER FRONT LEFT SPEAKER SURROUND LEFT SPEAKER 1 12 H500 W500 T501 POWER TRANSFORMER SOLDER SIDE W2 BLU W1 BRW PbF SB WA840EE 23 ...

Page 24: ...Anode B0AACK000004 2SD0592ARA E C B RSN311W64D P 1 26 B1AACF000117 B1GCCFJJ0016 B C E C B E B1BACG000048 B1BCCG000023 B0EAKM000122 Cathode A Ca Anode C B1ACCF000094 E B B0BA01900005 B0BA01100004 B0BA5R600016 B0JAPG000019 B0EAKM000117 Anode Cathode A Ca B1GACFJJ0018 C E B B0HARM000017 Anode Cathode A Ca 24 SB WA840EE ...

Page 25: ...olour Parts without these indications can be used for all areas Capacitor values are in microfarads µF unless specified otherwise P Pico farads pF F Farads Resistance values are in ohms unless specified otherwise 1K 1 000 OHM The marking RTL indicates that the Retention Time is limited for this items After the discontinuation of this assembly in production the item will continue to be available fo...

Page 26: ...14 1 Cabinet 14 1 1 Cabinet Parts Location 26 SB WA840EE ...

Page 27: ...27 SB WA840EE ...

Page 28: ...T M 3 RMQX0106 EVA PACKING WOOFER M 5 RGNX0277G S SPEC LABEL M 6 XTS4 16JFJ SCREW M 7 REM0072 4 FAN M 8 RGRX0040W H REAR PANEL M 9 RHD30065 1S SCREW M 10 RHD30090 1 SCREW M 11 RHD30119 S SCREW M 12 RMC0158 S2 TR FIXTURE M 13 RMG0606 K FAN INSULATOR M 14 RMN0203 PCB HOLDER M 15 XTB3 10JFJ SCREW M 16 XTB3 16AFJ SCREW M 17 XTB4 10GFJ SCREW M 18 XTW3 15TFJ SCREW M 19 RGPX0174 WOOFER SPACER M 20 RMQX01...

Page 29: ...04 DIODE M D560 B0AACK000004 DIODE M D561 B0BA01100004 DIODE M D562 B0AACK000004 DIODE M D563 B0BA01900005 DIODE M D564 B0BA01900005 DIODE M D565 B0BA01900005 DIODE M D566 B0BA01900005 DIODE M CONNECTORS CN501 K1FB125B0095 SYSTEM CONNECTOR M CN502 K1KB07B00020 7P CONNECTOR M CN503 RJT119W12V 12P CONNECTOR M CN506 K1KA04A00105 4P CONNECTOR M Ref No Part No Part Name Description Remarks CN507 K1KA02...

Page 30: ...606 ERG2SJ220E 22 2W M R609 ERDS1FVJ152T 1 5K 1 2W M R610 ERD2FCVJ4R7T 4 7 1 4W M R621 ERDS2TJ100T 10 1 4W M R622 ERDS2TJ100T 10 1 4W M R623 ERDS2TJ100T 10 1 4W M R624 ERDS2TJ100T 10 1 4W M R625 ERDS2TJ100T 10 1 4W M Ref No Part No Part Name Description Remarks CAPACITORS C501 F1D1H102A012 1000P 50V M C502 F1D1H102A012 1000P 50V M C503 F1D1H102A012 1000P 50V M C504 F1D1H102A012 1000P 50V M C505 F1...

Page 31: ... Description Remarks PACKING MATERIALS Ref No Part No Part Name Description Remarks P1 RPNX0317 POLYFOAM M P2 RPFX0071 MIRAMAT BAG M 14 3 Packing Materials Accessories Parts List 14 4 Packaging 31 SB WA840EE FLE0503 J A S E N ...

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Summary of Contents for SB-WA840

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Panasonic SB-WA840, Service Manual, Page: 17 / 31

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Summary of Contents for SB-WA840

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