Panasonic-SAAKX18P-cs-sm 电路图 维修手册.pdf

《Panasonic-SAAKX18P-cs-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Panasonic-SAAKX18P-cs-sm 电路图 维修手册.pdf（32页珍藏版）》请在收音机爱好者资料库上搜索。

1、 Panasonic Corporation 2014. All rights reserved. Unauthorized copying and distribution is a violation of law. PSG1405011AE A6 CD Stereo System Model No.SA-AKX18P Product Color: (K).Black Type TABLE OF CONTENTS PAGEPAGE 1 Safety Precautions- 3 1.1. General Guidelines- 3 1.2. Before Repair and Adjust

2、ment- 3 1.3. Protection Circuitry- 4 1.4. Power Supply using SMPS - 4 1.5. Safety Parts Information- 5 2 Warning- 6 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices -6 2.2. Precaution of Laser Diode-6 2.3. General description about Lead Free Solder (PbF) -

3、7 2.4. Handling Precautions for Traverse Unit -7 2.5. Grounding for electrostatic breakdown prevention-8 Notes: Please use this manual together with service manual Model No.SA-AKX18PN-K, Order no. (PSG1401007CE). ? ? Speaker system SB-AKX18P-K, Order No. PSG1406006AE RadioFans.CN 收音机爱 好者资料库 2 3 Serv

4、ice Navigation-9 3.1. Service Information-9 3.2. Notes-9 3.3. Different Points -10 4 Specifications- 11 5 Block Diagram -13 5.1. Audio -13 6 Schematic Diagram-14 6.1. Main (Damp) Circuit -14 6.2. Main (Tuner / AUX) Circuit-15 6.3. Main (USB) Circuit-16 6.4. Main (DSP) & Main (Bluetooth) Circuit -17

5、6.5. Main (Voltage Regulator) Circuit -18 6.6. Main (Micon) Circuit (1/3) -19 6.7. Main (Micon) Circuit (2/3) -20 6.8. Main (Micon) Circuit (3/3) -21 6.9. Panel Circuit-22 6.10. LCD, USB & CD Interface Circuit -23 7 Printed Circuit Board -24 7.1. Main P.C.B. -24 7.2. Panel, LCD & USB P.C.B.-25 8 Exp

6、loded View and Replacement Parts List -26 8.1. Cabinet Parts Location 1-26 8.2. Cabinet Parts Location 2-27 8.3. Packaging-28 8.4. Mechanical Replacement Part List -29 8.5. Electrical Replacement Parts List-31 RadioFans.CN 收音机爱 好者资料库 3 1Safety Precautions 1.1.General Guidelines 1. IMPORTANT SAFETY N

7、OTICE There 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 pa

8、rts to prevent 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 po

9、wer rating 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, r

10、eplace all 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 custo

11、mer from being 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

12、if wear or 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 t

13、o a shock 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, co

14、ntrol shafts, 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 no

15、t 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 shown in Figure 1-1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivit

16、y, 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 potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Si

17、mpson 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 equipment should be repaired and rechecked before it is returned to the custome

18、r. Figure 1-1 1.2.Before Repair and Adjustment Disconnect AC power to discharge AC capacitor as indicate below diagram through a 10 , 10 W resistor to ground. RadioFans.CN 收音机爱 好者资料库 4 Figure 1-2 Caution: DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy sol

19、id state devices. After repairs are completed, restore power gradually using a variac to avoid overcurrent. Current consumption at AC 120 V, 60 Hz in Power ON, FM Tuner at volume minimal mode should be 250 mA. 1.3.Protection Circuitry The protection circuitry may have operated if either of the follo

20、wing 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, for example, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less

21、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 and correct it. 3. Turn on the power once again after one minute. Note: When the protection circuitry functions, the unit wi

22、ll not operate unless the power is first turned off and then on again. 1.4.Power Supply using SMPS This model uses Switching Mode Power Supply (SMPS) to provide the power supply to the unit. Here is the supplied part no. for the SMPS Module 1) N0AB2GK00002 5 Figure 1-3 1.5.Safety Parts Information S

23、afety Parts List: There are 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 preven

24、t shock, fire or other hazards. Do not modify the original design without permission of manufacturer. SafetyRef No.Part No.Part Name & DescriptionRemarks 13RGR0443T-AAREAR PANEL 26RKM0713-K1TOP CABINET 301RAE1044Z-VTRAVERSE UNIT A2K2CB2CB00022AC CORD A3RQT9899-PO/I BOOK (En) PCB6N0AB2GK00002SMPS MOD

25、ULE 6 2Warning 2.1.Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi- tive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically Sensitive (ES) Devices. The following techniques

26、should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD). 1. Immediately before handling 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 co

27、mmercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the 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 elec

28、trostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. 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

29、 damage ES devices. 5. Do not use freon-propelled chemicals. 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 wit

30、h leads electrically shorted together by conductive foam, aluminum foil or compara- ble 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

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

32、oot from a carpeted floor can generate static electricity (ESD) suf- ficient to damage an ES device). 2.2.Precaution of Laser Diode Caution: This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens. Wavelength: 790 nm (CD) Maximum outpu

33、t radiation power from pickup: 100 W/VDE Laser radiation from the pickup unit is safety level, but be sure the followings: 1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous. 2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.

34、 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at pickup lens for a long time. 7 Figure 2-1 2.3.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 circuit board

35、s 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 solder is

36、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 Free Solder (PbF) The lead free solder has to be used when repairing the equipment for which the lead free solder is used. (Definition: The l

37、etter 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. 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 h

38、igher 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 control after setting the temperature at 35030 degrees C (66286F). Recommended Lead Free Solder (Service Parts Route.) The following

39、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 * Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3% 2.4.Handling Precautions

40、for Traverse Unit The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit. 2.4.1.Cautions to Be Taken in Handling

41、 the Optical Pickup Unit The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body. Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode. 1. Do not give a considerable shock to t

42、he optical pickup unit as it has an extremely high-precise structure. 2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should be short-circuited with a short pin or a clip. 3. The flexible cable may be cut off if an excessiv

43、e force is applied to it. Use caution when handling the flexible cable. 4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexi- The letter of “PbF” is printed either foil side or components side on the PCB using the lead fr

44、ee solder. (See right figure) 8 ble cable, cut off the antistatic FPC. Figure 2-2 2.5.Grounding for electrostatic breakdown prevention As for 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 e

45、nvironment that is grounded. 2.5.1.Worktable grounding Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed and ground the sheet. 2.5.2.Human body grounding Use the anti-static wrist strap to discharge the static electricity form your body Figure 2-3. Figure 2-3 9 3Service Navigation 3.1.Service Information This service manual