Technics-STC700-nap-sm 电路图 维修手册.pdf

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1、 Panasonic Corporation 2014. All rights reserved. Unauthorized copying and distribution is a violation of law. PSG1412001CE A6 Network Audio Player Model No.ST-C700EB ST-C700EG ST-C700GN ST-C700PP Product Color: (S).Silver Type TABLE OF CONTENTS PAGEPAGE 1 Safety Precautions- 3 1.1. General Guidelin

2、es- 3 1.2. Before Repair and Adjustment- 4 1.3. Protection Circuitry- 4 1.4. Caution For AC Cord (For EB)- 5 1.5. Safety Parts Information- 6 2 Warning- 7 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices- 7 2.2. General description about Lead Free Solder (

3、PbF)- 7 2.3. Grounding for electrostatic breakdown prevention - 8 3 Service Navigation- 9 3.1. Service Information - 9 4 Specifications -10 5 Location of Controls and Components-11 5.1. Remote Control Key Button Operation-11 5.2. Main Unit Key Button Operation-12 6 Service Mode -13 6.1. Doctor Mode-

4、 13 6.2. Service Mode - 14 6.3. Error Code Table- 15 7 Troubleshooting Guide - 16 7.1. Check the problem is reproduced- 16 7.2. No power- 17 7.3. No LED for Basic control switches- 20 7.4. No Display - 20 7.5. No Bluetooth Function- 21 7.6. No USB Function- 21 7.7. Pin function of each connectors- 2

5、2 7.8. Function and Possible failure PCB or Module- 23 8 Disassembly and Assembly Instructions- 24 8.1. Type of Screws - 24 8.2. Disassembly Flow Chart - 25 8.3. Main Components and P.C.B. Locations- 25 8.4. Disassembly of Top Cabinet Block - 26 8.5. Disassembly of Front Panel Unit - 27 8.6. Disasse

6、mbly of Touch Sensor P.C.B.- 28 8.7. Disassembly of BT P.C.B.- 28 RadioFans.CN 收音机爱 好者资料库 2 8.8. Disassembly of LCD P.C.B.-28 8.9. Disassembly of IR P.C.B.-28 8.10. Disassembly of USB P.C.B. -29 8.11. Disassembly of Power Switch P.C.B. -29 8.12. Disassembly of AirPlay Module -29 8.13. Disassembly of

7、 DAB Module (For EB/EG/GN) -29 8.14. Disassembly of Main P.C.B. Assy-30 8.15. Disassembly of SMPS P.C.B. -30 9 Service Position-32 9.1. Checking and Repairing of Main P.C.B. Assy and SMPS P.C.B. -32 10 Block Diagram -33 10.1. System Control -33 10.2. Audio -35 10.3. Power Supply -37 11 Wiring Connec

8、tion Diagram-40 12 Exploded View and Replacement Parts List-41 12.1. Cabinet Parts Location-41 12.2. Packaging-42 12.3. Mechanical Replacement Part List -43 12.4. Electrical Replacement Parts List-45 RadioFans.CN 收音机爱 好者资料库 3 1Safety Precautions 1.1.General Guidelines 1. IMPORTANT SAFETY NOTICE Ther

9、e are special components used in this equipment which are important for safety. These parts are marked by in the Schematic Diagrams, Circuit Board Layout, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturers specified parts to pre

10、vent X-RADIATION, shock, fire, or other hazards. Do not modify the original design without permission of manufacturer. 2. An Isolation Transformer should always be used during the servicing of AC Adaptor whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating

11、 as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect AC Adaptor from being damaged by accidental shorting that may occur during servicing. 3. When servicing, observe the original lead dress. If a short circuit is found, replace all

12、 parts which have been overheated or damaged by the short circuit. 4. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed. 5. After servicing, make the following leakage current checks to prevent the customer from b

13、eing exposed to shock hazards. (This “Safety Precaution” is applied only in U.S.A.) 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

14、 damage is evident. 4. After servicing, be sure to restore 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 the customer from being exposed to a shock

15、hazard. 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 cabinet part on the equipment such as screwheads, connectors, control shaf

16、ts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1M and 5.2M. When the exposed metal does not have a return path to the chassis, the reading must be 1.1.2.Leakage Current Hot Check 1. Plug the AC cord directly into the AC outlet. Do not use an i

17、solation 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 shown in Figure 1-1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to meas

18、ure 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 potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Mode

19、l 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 equipment should be repaired and rechecked before it is returned to the customer. Figure

20、1-1 RadioFans.CN 收音机爱 好者资料库 4 1.2.Before Repair and Adjustment Disconnect Power Supply AC to discharge AC capacitor as indicate in SMPS P.C.B. through a 10 W, 10 W resistor to ground. Figure 1-2 Caution: DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy soli

21、d state devices. After repairs are completed, restore power gradually using a variac to avoid overcurrent. Current consumption at AC 220V - 240V, should be 705mA during power on. (In Standby mode) should be 0.20W. (EB/EG/ GN) Current consumption at AC 120V, should be 60020mA during power on. (In Sta

22、ndby mode) should be 0.20W. (PP) 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, f

23、or 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 a

24、nd 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. 5 1.4.Caution For AC Cord (For EB) Figure 1-3 6 1.5.Safety Parts Information Safety Parts List: There are

25、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 manufacturers specified parts to prevent shock, fire or other hazar

26、ds. Do not modify the original design without permission of manufacturer. SafetyRef No.Part No.Part Name & DescriptionRemarks 13RGR0464A-A5REAR PANELEB,EG,GN 13RGR0464B-B4REAR PANELPP 27RMV0447SMPS SHEET A2K2CB2YY00098AC CORDPP A2K2CJ2YY00097AC CORDGN A2K2CQ2YY00127AC CORDEG A2K2CT2YY00103AC CORDEB

27、A3SQT0492OI (En)EB,GN A3SQT0493OI (Ge,Fr,It,Du)EG A3SQT0494OI (Sw,Da,Fi,Sp)EG A3SQT0495OI (En)PP A3SQT0496OI (Cf)PP PCB7REP5095ASMPS P.C.BEB,EG,GN PCB7REP5095BSMPS P.C.BPP 7 2Warning 2.1.Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi- tive (ES) Devices Some semiconductor (sol

28、id state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically Sensitive (ES) Devices. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD). 1. Immediately before handl

29、ing any semiconductor component or semiconductor-equipped 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, which should be removed for potential shock reasons prior to applying power to the

30、 unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi- num foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4.

31、 Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

32、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, aluminum foil or compara- ble conductive material). 7. Immediately before

33、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. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize

34、bodily 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 static electricity (ESD) suf- ficient to damage an ES device). 2.2.General description about

35、Lead Free Solder (PbF) The lead free solder has been used in the mounting process of all electrical components on the printed circuit 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, th

36、e lead free solder is the alloy mainly consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86F) more than that of the normal solder. Definition of PCB Lead Free Solder being used Service caution for repair work using Lead Fr

37、ee Solder (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.

38、 Remove 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 temper

39、ature control after setting the temperature at 35030 degrees The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder. (See right figure) 8 C (66286F). Recommended Lead Free Solder (Service Parts Route.) The following 3 types of lead free solder are av

40、ailable through the service parts route. RFKZ03D01K-(0.3mm 100g Reel) RFKZ06D01K-(0.6mm 100g Reel) RFKZ10D01K-(1.0mm 100g Reel) Note * Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3% 2.3.Grounding for electrostatic breakdown prevention As for

41、 parts that use optical pick-up (laser diode), the optical pick-up is destroyed by the static electricity of the working environ- ment. Repair in the working environment that is grounded. 2.3.1.Worktable grounding Put a conductive material (sheet) or iron sheet on the area where the optical pickup i

42、s placed and ground the sheet. 2.3.2.Human body grounding Use the anti-static wrist strap to discharge the static electricity form your body Figure 2-1. Figure 2-1 9 3Service Navigation 3.1.Service Information This service manual contains technical information which will allow service personnels to

43、understand and service this model. Please place orders using the parts list and not the drawing reference numbers. If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service manual. PCB Replacement BT P.C.B. and Touch Sensor P.C.B. should be replaced at the same time as a pair. After replacement, please check NFC and Bluetooth operation. 10 4Specifications ? General Power supplyAC 220 V to 240 V, 50/60 Hz (EB/EG/GN) AC 120 V, 60 Hz (PP) Power consumption26 W Power Co