Panasonic-SAXR55P-avr-sm 维修电路原理图.pdf

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1、n AMPLIFIER SECTIONRated minimum sine wave RMS power output20 Hz-20 kHz both channels driven0.09 % total harmonic distortion100 W per channel(6 )1 kHz continuous power output both channels driven0.09 % total harmonic distortion105 W per channel(6 )Total harmonic distortionrated power at 20 Hz-20 kHz

2、0.09 % (6 )Power bandwidthboth channels driven, -3 dB4 Hz-88 kHz(6 , 0.9 %)Power output each channel driven0.9 % total harmonic distortion at 1kHzFront (L/R)100 W (6 )Center100 W (6 )Surround (L/R)100 W (6 )Surround Back (L/R)100 W (6 )Load impedanceFront (L/R)A or B6-8 A and B6-8 BI-WIRE6-8 Center6

3、-8 Surround (L/R)6-8 Surround Back (L/R)6-8 Frequency responseCD, TAPE, TV, DVD, DVD RECORDER,VCR1, VCR24 Hz-88 kHz, 3 dBDVD 6CH4 Hz-44 kHz, 3 dB 2005 Matsushita Electric Industrial Co. Ltd. Allrightsreserved.Unauthorizedcopyinganddistribution is a violation of law.SA-XR55PSA-XR55PCColour(S).Silver

4、Type(K).Black Type (P only)Input sensitivityCD, TAPE, TV, DVD, DVD RECORDER,VCR1, VCR227 mV(200mV, IHF 66)Input impedanceCD, TAPE, TV, DVD, DVD RECORDER,VCR1, VCR222 kS/N (IHF A)CD, TV, DVD, DVD RECORDER(Digital Input)85 dB(103 dB, IHF 66)Tone controlsBASS50 Hz, +10 to -10 dBTREBLE20 kHz, +10 to -10

5、 dBSubwoofer frequency response (-6 dB)7 Hz-200 Hzn FM TUNER SECTIONFrequency range87.9-107.9 MHzSensitivity11.2 dBf(2 V, IHF 58)50 dB quieting sensitivityMONO18.3 dBf(4.5 V, IHF 58)STEREO38.3 dBf(45 V, IHF 58)Total harmonic distortionMONO0.2%STEREO0.3%S/NAV Control ReceiverSpecificationORDER NO. MD

6、0504178C1A1RadioFans.CN 收音机爱 好者资料库MONO73 dBSTEREO67 dBFrequency response20 Hz-15 kHz, +1 dB,-2 dBAlternate channel selectivity65 dBCapture ratio1.5 dBImage rejection at 98 MHz40 dBSpurious response rejection at 98 MHz75 dBAM suppression50 dBStereo separation1 kHz40 dB10 kHz30 dBAntenna terminal75 (u

7、nbalanced)n AM TUNER SECTIONFrequency range530-1710 kHzSensitivity20 V, 330 V/mSelectivity55 dBIF rejection at 1000 kHz50 dBn VIDEO SECTIONOutput voltage at 1 V input (unbalanced)10.1 Vp-pMaximum input voltage1.5 Vp-pInput/output impedance75 S-Video 1 SAFETY PRECAUTIONS 4 1.1. GENERAL GUIDELINES 4 2

8、 Before Repair and Adjustment 5 3 Protection Circuitry 5 4 Handling the Lead-free Solder 5 4.1. About lead free solder (PbF) 5 5 Accessories 6 6 Operating Instructions 7 6.1. Main Unit 7 6.2. Remote Control 8 6.3. Home Theater Connections 9 6.4. Other Connections 14 7 Disassembly and Main Component

9、Replacement Proceduresand Operational Check 17 7.1. Disassembly flow chart 17 7.2. P.C.B. Positions 18 7.3. Disassembly of Top Cabinet. 18 7.4. Checking for the DSP P.C.B. (Side A/B) and Main P.C.B.(Side A). 19InputTV, DVD, DVDRECORDEROutputTV MONITORComponent VideoInputTV, DVD, DVDRECORDEROutputTV

10、MONITORn GENERALPower supplyAC 120 V, 60 HzPower consumption135 WDimensions (W H D)430 mm 107.5 mm 394 mm(16-15/16” 4-7/32” 15-1/2”)Mass4.6 kg (10.1 lb.)n DIN POWER1 kHz, T.H. D 1%2 x 100 W (6 )Notes:1.Specifications are subject to change without notice.Mass and dimensions are approximate.2.Total ha

11、rmonic distortion is measured by the digital spectrumanalyzer. 7.5. Disassembly and Checking of Main P.C.B. (Side B) 20 7.6. Disassembly of Tuner Pack and Tuner Extent P.C.B. 20 7.7. Disassembly and Checking of Speaker P.C.B. 21 7.8. Disassembly and Checking of Component Video P.C.B. 21 7.9. Disasse

12、mbly and Checking of Video & Optical P.C.B. 22 7.10. Disassembly of Rear Panel 22 7.11. Disassembly and Checking of Input P.C.B. 23 7.12. Disassembly of Front Panel 24 7.13. Disassembly and Checking of Panel P.C.B., VolumeP.C.B. and Headphone P.C.B. 25 7.14. Disassembly and Checking of Power P.C.B.

13、26 8 Self Diagnosis Display Function 27 8.1. Automatically Displayed Error Codes 27 8.2. Display Details 27 8.3. Returning to Normal Display 27 8.4. Overload/Shutdown Detection intenal Condition 27 8.5. Overload/Thermal Detection Display 27 8.6. Activating Self Diagnosis Function (Servicing Mode) 27

14、 8.7. Analog 6.1 CH Output Check Method 28CONTENTS Page Page2SA-XR55P / SA-XR55PCRadioFans.CN 收音机爱 好者资料库 8.8. Returning to Normal Display 28 8.9. Activating Self Diagnosis Function (Doctor Mode) 28 9 Voltage Measurement and Waveform Chart 30 9.1. Voltage Measurement 30 9.2. Waveform Chart 37 10 Bloc

15、k Diagram 39 11 Notes of Schematic Diagram 51 12 Schematic Diagram 52 12.1. DSP Circuit 52 12.2. Main Circuit 57 12.3. Input Circuit &Tuner Extent Circuit 75 12.4. Panel Circuit 80 12.5. Speaker Circuit, Headphone Circuit & Volume Circuit 82 12.6. Power Circuit 83 12.7. Video and Optical Circuit 87

16、12.8. Component Video Circuit 90 13 Printed Circuit Board 91 13.1. DSP P.C.B. (Side A & B) 91 13.2. Main P.C.B. (Side A & B) 93 13.3. Input P.C.B. 97 13.4. Tuner Extent P.C.B., Panel P.C.B. & Headphone P.C.B. 99 13.5. Volume P.C.B. & Speaker P.C.B. 101 13.6. Power P.C.B. 102 13.7. Video & Optical P.

17、C.B. & Component Video P.C.B. 103 14 Wiring Connection Diagram 105 15 Type Illustration of ICs, Transistors and Diodes 107 16 Terminal Function of ICs 108 16.1. IC6801 (C2BBGF000669): Microprocessor 108 17 Parts Location and Replacement Parts List 109 17.1. Cabinet Parts Location 110 17.2. Electrica

18、l Parts List 113 17.3. Packing Materials & Accessories Parts List 129 17.4. Packaging 1293SA-XR55P / SA-XR55PC(This “Safety Precaution” is applied only in U.S.A.)1 SAFETY PRECAUTIONS1.1. GENERAL GUIDELINES 1. When servicing. observe the original lead dress. If a short circuit is found, replace all p

19、arts which have been overheated ordamaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properlyinstalled. 3. After servicing, make the following leakage current checks to prevent the customer from being

20、 exposed to shock hazards. 1. Before servicing, unplug the power cord to prevent an electric shock. 2. When replacing parts, use only manufacturers recommended components for safety. 3. Check the condition of the power cord. Replace if wear or damage is evident. 4. After servicing, be sure to restor

21、e the lead dress, insulation barriers, insulation papers, shields, etc. 5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent thecustomer from being exposed to a shock hazard.1.1.1. LEAKAGE CURRENT COLD CHECK 1. Unplug the AC

22、cord and connect a jumper between the two prongs on the plug. 2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part onthe equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path t

23、o thechassis, the reading should be between 1M and 5.2.When the exposed metal does not have a return path to the chassis, the reading must be.Fig. 11.1.2. 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.

24、 Connect a 1.5k, 10 watts resistor, in parallel with a 0.15F capacitors, between each exposed metallic part on the set and agood earth ground such as a water pipe, as shown in Figure 1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor. 4.

25、Check each exposed metallic part, and measure the voltage at each point. 5. Reverse the AC plug in the AC outlet and repeat each of the above measurements. 6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) maybe used to make th

26、e hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limitsspecified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned tothe customer.4SA-XR55P / SA-XR55PC1.1.3. CAUTION FOR FUSE REPLACEM

27、ENT2 Before Repair and AdjustmentDisconnect AC power, discharge Power Supply Capacitors C707, C717 and C718 through a 10 , 10 W resistor to ground. DONOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.After repairs are completed, restore powe

28、r gradually using a variac, to avoid overcurrent. Current consumption at AC 120 V, 50/60 Hz in NO SIGNAL mode should be 200800 mA.3 Protection CircuitryThe protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is turned on. Sound s

29、tops 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 t

30、he 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 Le

31、ad-free Solder4.1. About lead free solder (PbF)Distinction of PbF P.C.B.:P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.Caution: Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70F (30 - 40C) higher. Pleaseuse a hi

32、gh temperature soldering iron. In case of soldering iron with temperature control, please set it to 700 20F (370 10C). Pb free solder will tend to splash when heated too high (about 1100F/600C). When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and

33、 be sure to heat thesoldering points with the Pb free solder until it melts enough.5SA-XR55P / SA-XR55PC5 AccessoriesNote : Refer to Packaging Materials & Accessories Part List (Section 17.3) for part number.AC cordFM indoor antennaAM loop antennaRemote control6SA-XR55P / SA-XR55PC6.1. Main Unit6 Op

34、erating Instructions7SA-XR55P / SA-XR55PC6.2. Remote Control8SA-XR55P / SA-XR55PC6.3. Home Theater Connections6.3.1. TV and DVD Player9SA-XR55P / SA-XR55PC10SA-XR55P / SA-XR55PC6.3.2. Speakers11SA-XR55P / SA-XR55PC12SA-XR55P / SA-XR55PC6.3.3. AC Power Supply Cord13SA-XR55P / SA-XR55PC6.4. Other Conn

35、ections14SA-XR55P / SA-XR55PC15SA-XR55P / SA-XR55PC16SA-XR55P / SA-XR55PC7 Disassembly and Main Component ReplacementProcedures and Operational Check“ATTENTION SERVICER”Some chassis components may be have sharp edges. Be careful when disassembling and servicing. 1. This section describes procedures

36、for checking the operation of the major printed circuit boards and replacing the maincomponents. 2. For reassembly after operation checks or replacement, reverse the respective procedures.Special reassembly procedures are described only when required. 3. Select items from the following index when ch

37、ecks or replacement are required. Disassembly of Top Panel Checking for the DSP P.C.B. (Side A/B) and Main P.C.B. (Side A) Disassembly and checking of Main P.C.B. (Side B) Disassembly of Tuner Pack and Tuner Extent P.C.B. Disassembly and Checking of Speaker P.C.B. Disassembly and Checking of Compone

38、nt Video P.C.B. Disassembly and Checking of Video & Optical P.C.B. Disassembly of Rear Panel Disassembly of Checking of Input P.C.B. Disassembly of Front Panel Disassembly and Checking of Panel P.C.B., Volume P.C.B. and Headphone P.C.B. Disassembly and Checking of Power P.C.B.7.1. Disassembly flow c

39、hartThe following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out theservicing.To assemble the unit, reverse the steps shown in the chart below.17SA-XR55P / SA-XR55PC7.2. P.C.B. Positions7.3. Disassembly of Top Cabinet.Step 1 : Remove 4

40、screws from the top cabinet.Step 2 : Remove 3 screws from the rear panel.Step 3 : Lift up the top cabinet as arrow shown.18SA-XR55P / SA-XR55PCStep 4 : Remove the top cabinet.7.4. Checking for the DSP P.C.B.(Side A/B) and Main P.C.B.(Side A). Follow the (Step 1) - (Step 4) of item 7.3.Step 1 : Check

41、 the DSP P.C.B. (Side A).Step 2 : Remove 1 screw.Step 3 : Release the claws of the P.C.B support then detachthe DSP. P.C.B.Step 4 : Flip over the DSP P.C.B. as arrow shown.19SA-XR55P / SA-XR55PCStep 5 : Connect the DSP P.C.B. (Side B) and Main P.C.B.(Side A) by using the extension cable then proceed

42、 with thechecking.7.5. Disassembly and Checking ofMain P.C.B. (Side B) Follow the (Step 1) - (Step 4) of item 7.3. Follow the (Step 1) - (Step 5) of item 7.4.Steps 1 and 2 : Remove 4 screws altogether.Step 3 : Detach the 25 pin FFC wire (REE1324) betweenconnectors P6501B (Main P.C.B.) and P6501A (In

43、put P.C.B.)Step 4 : Flip over the Main P.C.B. as arrow shown.Step 5 : Check the Main P.C.B (Side B) by connecting theextension cable (RFKZ0317-25 pin).7.6. Disassembly of Tuner Packand Tuner Extent P.C.B. Follow the (Step 1) - (Step 4) of item 7.3.20SA-XR55P / SA-XR55PCStep 1: Remove 2 screws.Step 2

44、: Remove the tuner pack together with the Tuner ExtentP.C.B. from the rear panel as arrow shown.Step 3: Detach the tuner pack from the Tuner Extent P.C.B. asarrow shown.7.7. Disassembly and Checking ofSpeaker P.C.B. Follow the (Step 1) - (Step 4) of item 7.3.Step 1: Remove 5 screws.Step 2: Remove th

45、e Speaker P.C.B. from rear panel as arrowshown for checking.7.8. Disassembly and Checking ofComponent Video P.C.B. Follow the (Step 1) - (Step 4) of item 7.3.Step 1: Remove 4 screws.Step 2: Remove the Component Video P.C.B. from rear panelas arrow shown.21SA-XR55P / SA-XR55PCStep 3: Flip over the Co

46、mponent Video P.C.B. as arrow shownfor checking7.9. Disassembly and Checking ofVideo & Optical P.C.B. Follow the (Step 1) - (Step 4) of item 7.3. Follow the (Step 1) - (Step 2) of item 7.6. Follow the (Step 1) - (Step 3) of item 7.8.Step 1: Remove 7 screws.Step 2: Remove the Video & Optical P.C.B. f

47、rom rear panel asarrow shown.Step 3: Flip over the Video & Optical P.C.B. as arrow shown forchecking7.10. Disassembly of Rear Panel Follow the (Step 1) - (Step 4) of item 7.3. Follow the (Step 1) of item 7.6. Follow the (Step 1) of item 7.7. Follow the (Step 1) of item 7.8. Follow the (Step 1) of it

48、em 7.9.22SA-XR55P / SA-XR55PCStep 1: Remove 11 screws.Step 2: Be careful of the both side catches when remove therear panel.Step 3: Remove the rear panel as arrows shown.7.11. Disassembly and Checking ofInput P.C.B. Follow the (Step 1) - (Step 4) of item 7.3. Follow the (Step 1) of item 7.6. Follow

49、the (Step 1) of item 7.7. Follow the (Step 1) of item 7.8. Follow the (Step 1) of item 7.9. Follow the (Step 1) - (Step 3) of item 7.10.Step 1: Remove 2 screws.Step 2: Flip over the Input P.C.B. as arrow shown .23SA-XR55P / SA-XR55PCStep 3: Proceed to check the Input P.C.B.7.12. Disassembly of Front

50、 Panel Follow the (Step 1) - (Step 4) of item 7.3.Step 1: Disconnect all the connectors (P951B, P902, P402,P303).Step 2: Be careful when remove the wires from the cord holder.Step 3: Remove 3 screws.Step 4: Release the both claws and remove the front panel asarrows shown.24SA-XR55P / SA-XR55PC7.13.