Panasonic-SAHR50E-avr-sm 电路图 维修手册.pdf

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1、I IAMPLIFIER SECTION RMS output power: Dolby Digital Mode T.H.D. 10% (Each channel driven) 1 kHz front CH 150 W per channel (6 ) 1 kHz surround CH 80 W per channel (4 ) 1 kHz center CH 80 W per channel (4 ) Total RMS output power540 W RMS output power: STEREO Mode T.H.D. 10% 1 kHz front CH 150 W per

2、 channel (6 ) Total harmonic distortion Half power at 1 kHz (Front CH)0.5% (6 ) Input sensitivity DVD-P,TV,BD/DVR450 mV, IHF66 S/N at rated power (6 ) DVD-P,TV,BD/DVR 80 dB (85 dB, IHF66) Input impedance DVD-P,TV,BD/DVR 47 k Tone controls BASS50 Hz, +6 dB to -6 dB TREBLE20 kHz, +6 dB to -6 dB Load i

3、mpedance Front (L/R)6 to 8 2007 Matsushita Electric Industrial Co. Ltd. All rightsreserved.Unauthorizedcopyingand distribution is a violation of law. SA-HR50E SA-HR50EG Colour (S).Silver Type (K).Black Type Surround (L/R)4 to 8 Center4 to 8 Digital input OPTICAL2 COAXIAL1 HDMI Input2 HDMI Onput1 I I

4、FM TUNER SECTION Frequency range 87.50 MHz to 108.00 MHz Sensitivity S/N 30 dB1.9 V/75 S/N 26 dB1.8 V/75 S/N 20 dB1.6 V/75 IHF usable sensitivity(IHF58) 2.2 V/75 IHF 46 dB stereo quieting sensitivity22 V/75 Total Harmonic distortion MONO0.2% STEREO0.3% S/N MONO60 dB (71 dB, IHF) STEREO58 dB (65 dB,

5、IHF) Frequency response 20 Hz to 15 kHz, +1 dB, -2 dB Image rejection at 98 MHz40 dB IF rejection at 98 MHz70 dB Stereo separation (1 kHz)40 dB Antenna terminal75 (unbalanced) AV Control Receiver Specification ORDER NO. MD0708021CE RadioFans.CN 收音机爱 好者资料库 I IAM TUNER SECTION Frequency range 522 kHz

6、to 1611 kHz (9 kHz steps) 530 kHz to 1620 kHz (10 kHz steps) Sensitivity500 V/m Selectivity (at 999 kHz)35 dB I IGENERAL Power supply AC 230 V to 240 V, 50 Hz 1 Safety Precautions 3 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 4 3 About Lead Free Solder

7、(PbF) 5 4 Accessories 6 5 Operation Procedures 7 6 Self Diagnosis and Special Mode Setting 12 7 Assembling and Disassembling 15 8 Service Positions 33 9 Voltage Measurement and Waveform Chart 38 Power consumption125 W Dimensions (W H D) 430 mm x 105 mm x 389 mm Massapprox. 4.0 kg Power consumption i

8、n standby mode:1 W Notes: 1. Specifications are subject to change without notice. 2. Total harmonic distortion is measured by the digital spectrum analyzer. 10 Wiring Connection Diagram 47 11 Block Diagram 49 12 Notes of Schematic Diagram 55 13 Schematic Diagram 57 14 Printed Circuit Board Diagram 7

9、3 15 Illustrations of ICs, Transistors & Diodes 81 16 Terminal Functions of Integrated Circuits 82 17 Exploded Views 83 18 Replacement Parts List 85 CONTENTS Page Page 2 -HR50E / SA-HR50EG RadioFans.CN 收音机爱 好者资料库 1 Safety Precautions 1.1. General Guidelines 1. When servicing, observe the original le

10、ad dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 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 lea

11、kage current checks to prevent the customer from being exposed to shock hazards. 1.1.1. Leakage Current Cold Check 1. Unplug the AC 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

12、cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, 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. 1.1.2. Leakage Current

13、 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 0.15F capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as sh

14、own in Figure 1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor. 4. 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 potent

15、ial at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and the

16、equipment should be repaired and rechecked before it is returned to the customer. Fig. 1 1.2. Before Repair and Adjustment Disconnect AC power, discharge Power Supply Capacitors C707, C804, C859, C860 & C861, C540, C541, C544, C545, C594, C595, C644, C645, C694, C695, C5508 & C5509 through a 10 , 1W

17、 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 230 V - 240 V, 50Hz in NO SIGNAL mode should be 2

18、00 800 mA . 1.3. Protection Circuitry The protection circuitry may have operated if either of the following conditions is noticed: *No sound is heard when the power is supplied. *Sound stops during a performance. The functions of this circuitry is to prevent circuitry damage, for example, the positi

19、ve and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated impedance of this unit are used. If this occurs, follow the procedure outlined below: 3 SA-HR50E / SA-HR50 RadioFans.CN 收音机爱 好者资料库 1. Press the STANDBY/ON button, switch to S

20、TANDBY mode. 2. Determine the cause of the problem and correct it. 3. Press the STANDBY/ON button once again, supply the power. Note: When the protection circuitry functions, the unit will not operate unless the STANDBY/ON button is first switched STANDBY and then ON again. 1.4. Safety Part Informat

21、ion Safety Parts List: There are special components used in this equipment which are important for safety. These parts are marked byin the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts should be replaced with manufacturers specified parts to prevent shock, fi

22、re or other hazards. Do not modify the original design without permission of manufacturer. Table 1 Reference No.Part No.Part Name & DescriptionRemarks DZ701ERZV10V511CSZENERM TH701D4CAC8R00002THERMISTORM TH702D4CC11040013THERMISTORM L701ELF18N067ECOMMON MODE COILM L702ELF21N015ECOMMON MODE COILM L70

23、3ELF21N015ECOMMON MODE COILM T701ETS48AA196ACMAIN TRANSFORMERM T721ETS25AD1P6AGBACKUP TRANSFORMERM T800ETS28AU3G9ACSUB TRANSFORMERM PC701B3PBA0000402PHOTO COUPIERM PC721B3PBA0000402PHOTO COUPIERM RY721K6B1AEA00003PC POWER RELAYM F1K5D402BLA013FUSE T4AL 250VM P701K2AA2B000017AC INLETM A2K2CQ2CA00007A

24、C CORDM C701ECQU2A334MLA0.33 100VM C703F1BAF10200201000PM C704F1BAF10200201000PM C706ECQU2A104MLC0.1 100VM C714F1BAF10200201000PM C732F1BAF10200201000PM 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged

25、easily by electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of c

26、omponent damage caused by electro static discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap

27、, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as aluminium foil, to prevent electrostatic charge build up or exposure of the assem

28、bly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge to damage ES devices. 5. Do not use freon-propelled chemicals.

29、 These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, al

30、uminium foil or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. 4 -HR50E / SA-HR50EG Caution Be sure no power i

31、s applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate stat

32、ic electricity (ESD) sufficient to damage an ES device). 3 About Lead Free Solder (PbF) 3.1. Service caution based on legal restrictions 3.1.1. General description about Lead Free Solder (PbF) The lead free solder has been used in the mounting process of all electrical components on the printed circ

33、uit boards used for this equipment in considering the globally environmental conservation. The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free s

34、older is higher approx.30 degrees C (86F) more than that of the normal solder. Definition of PCB Lead Free Solder being used The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder. (See right figure) Service caution for repair work using Lead Free So

35、lder (PbF) The lead free solder has to be used when repairing the equipment for which the lead free solder is used. (Definition: The letter of “PbF” is printed on the PCB using the lead free solder.) To put lead free solder, it should be well molten and mixed with the original lead free solder. Remo

36、ve the remaining lead free solder on the PCB cleanly for soldering of the new IC. Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the lead free solder. Use the soldering iron (more than 70W) equipped with the temperature

37、 control after setting the temperature at 35030 degrees C (66286F). Recommended Lead Free Solder (Service Parts Route.) The following 3 types of lead free solder are available through the service parts route. RFKZ03D01K-(0.3mm 100g Reel) RFKZ06D01K-(0.6mm 100g Reel) RFKZ10D01K-(1.0mm 100g Reel) Note

38、 * Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3% 5 SA-HR50E / SA-HR50 4 Accessories Note: Refer to Replacement Part list (Section 18) for the part number. 6 -HR50E / SA-HR50EG 5 Operation Procedures 5.1. Remote Control Operation 7 SA-HR50E

39、/ SA-HR50 5.2. Main Unit Operation 8 -HR50E / SA-HR50EG 5.3. Basic operations 5.4. Main Unit Connection (SA-HR50E/EG-S/K) 5.4.1. Speaker setup 9 SA-HR50E / SA-HR50 5.4.2. Home theater connections 10 -HR50E / SA-HR50EG 11 SA-HR50E / SA-HR50 6 Self Diagnosis and Special Mode Setting This unit is equip

40、ped with function for checking and inspecting namely: Self-Diagnostic and Test Mode. 6.1. Service Mode Summary Table The service mode can be activated by pressing various button combination on the main unit and remote control unit. Below is the summary for the various modes for checking: 12 -HR50E /

41、 SA-HR50EG 6.2. Doctor & Service Mode (Special Mode setting) 13 SA-HR50E / SA-HR50 6.2.1. Inspection & Checking Items After entering into doctor mode, the main unit can be used for checking of various items using the remote control. 6.3. Error Code Table Self- Diagnosis Function provides information

42、 on any problems occuring for the units and its respective parts by displaying error codes. 14 -HR50E / SA-HR50EG 7 Assembling and Disassembling 7.1. Caution “Attention Servicer” Some chassis components may have sharp edges. Be careful when disassembling and servicing. 1. This section describes proc

43、edures for checking the operation of the major printed circuit boards and replacing the main components. 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 inde

44、x when checks or replacement are required. 4. Refer to the Parts No. on the page of “Replacement Parts List” (Section 18), if necessary. Below is the list of disassembly procedures Disassembly of Top Cabinet Disassembly of HDMI P.C.B. Disassembly of Rear Panel Disassembly of Front Panel Disassembly

45、of Panel P.C.B., Music Port P.C.B. & Volume P.C.B. Disassembly of Main P.C.B. Disassembly of DSP P.C.B. Disassembly of AC Inlet P.C.B. Disassembly of SMPS P.C.B. Replacement of Switching Regulator IC (IC701). Replacement of Switching Regulator IC (IC800). Replacement of Thermal Diode (D855). Replace

46、ment of Thermal Diode (D856). Disassembly of Digital Amp P.C.B. Replacement of Audio Digital Power Amp IC (IC551). Replacement of Audio Digital Power Amp IC (IC552). Replacement of Audio Digital Power Amp IC (IC553). Replacement of Audio Digital Power Amp IC (IC554). Below shown is the part number o

47、f different screws types used: 15 SA-HR50E / SA-HR50 7.2. 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 as below. 16 -HR50E

48、/ SA-HR50EG 7.3. Main Components and P.C.B Locations. 17 SA-HR50E / SA-HR50 7.4. Disassembly of Top Cabinet Step 1: Remove 1 screw at each side of the top cabinet. Step 2: Remove 2 screws at rear panel. Step 3: Lift the sides of the top cabinet outwards. Step 4: Push the top cabinet in the direction

49、 of arrows to release the catches. Step 5: Lift up the top cabinet with care. 7.5. Disassembly of HDMI P.C.B. Follow the (Step 1) - (Step 5) of item 7.4. Step 1: Remove 3 screws at the rear panel. Step 2: Remove 1 screw. Step 3: Detach FFC cables at connectors (CN2201 & CN2202) on HDMI P.C.B. Step 4: Detach wire connector (CNA781). Step 5: Lift up HDMI support chassis