Panasonic-SAVKX25-cs-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. PSG1409002CE DVD Stereo System Model No.SA-VKX25EE SA-VKX25GA SA-VKX25GS Product Color: (K).Black Type TABLE OF CONTENTS PAGEPAGE 1 Safety Precautions- 3 1.1. General Guidelines- 3 1.2. Bef

2、ore Repair and Adjustment- 4 1.3. Protection Circuitry- 4 1.4. Caution For AC Cord (For GS only) - 5 1.5. Power Supply using SMPS - 6 1.6. Safety Parts Information- 6 2 Warning- 7 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices- 7 2.2. Precaution of Laser

3、 Diode- 7 2.3. General description about Lead Free Solder (PbF)- 8 2.4. Handling Precautions for Traverse Unit- 8 2.5. Grounding for electrostatic breakdown prevention - 9 3 Service Navigation-10 3.1. Service Information- 10 4 Specifications- 11 5 Location of Controls and Components- 12 5.1. Remote

4、Control Key Button Operation - 12 5.2. Main Unit Key Button Operation- 13 6 Service Mode- 14 6.1. Service Mode Table - 14 6.2. Sales Demonstration Lock Function - 14 6.3. Doctor Mode Table- 15 6.4. Error Code Table- 18 6.5. Self-Diagnostic Mode - 19 6.6. Self Diagnostic Function-Error Code- 24 6.7.

5、Firmware Version-Up Information- 25 7 Troubleshooting Guide - 28 7.1. No Power or No Display- 28 7.2. Bluetooth Pairing Failure- 28 7.3. No Key Function- 28 Please refer to the original service manual for: DVD Mechanism Unit (BRS12D), Order No. PSG1408009AE Speaker system SB-AKX18PN-K, Order No. PSG

6、1401008CE RadioFans.CN 收音机爱 好者资料库 2 7.4. No Remote Control Function-28 7.5. USB Device Cannot Detect-29 7.6. No Output Sound-30 7.7. Check Point-31 8 Disassembly and Assembly Instructions-34 8.1. Type of Screws -34 8.2. Disassembly Flow Chart-34 8.3. Main Components and P.C.B. Locations-35 8.4. Disa

7、ssembly of Top Cabinet-36 8.5. Disassembly of Front Panel Unit-36 8.6. Disassembly of Panel P.C.B. and Music Port P.C.B.-37 8.7. Disassembly of USB P.C.B. -38 8.8. Disassembly of Rear Panel.-38 8.9. Disassembly of Main P.C.B.-39 8.10. Disassembly of SMPS Module -39 8.11. Disassembly of DVD Mechanism

8、 Unit-40 8.12. Disassembly of Backend P.C.B. Assy-41 9 Service Position-42 9.1. Checking of Panel P.C.B. and Music Port P.C.B.-42 9.2. Checking and Repairing of Main P.C.B. and SMPS Module-42 9.3. Checking and Repairing of Backend P.C.B. Assy-43 10 Block Diagram -45 10.1. Backend -45 10.2. System Co

9、ntrol -47 10.3. Audio -50 10.4. Power Supply -51 11 Wiring Connection Diagram-53 12 Schematic Diagram-55 12.1. Schematic Diagram Notes-55 12.2. Backend (DV5U) Circuit (1/4)-57 12.3. Backend (DV5U) Circuit (2/4)-58 12.4. Backend (DV5U) Circuit (3/4)-59 12.5. Backend (DV5U) Circuit (4/4)-60 12.6. Back

10、end (Motor Driver) Circuit -61 12.7. Backend (Video) Circuit -62 12.8. Main (UP) Circuit-63 12.9. Main (SOC) Circuit-64 12.10. Main (USB) Circuit-65 12.11. Main (Tuner AUX) Circuit -66 12.12. Main (DSP) Circuit-67 12.13. Main (DAMP) Circuit-68 12.14. Main (Voltage Regulator) Circuit -69 12.15. Main

11、(Connector) Circuit -70 12.16. Main (Bluetooth) Circuit-71 12.17. Panel Circuit-72 12.18. USB & Music Port Circuit-73 13 Printed Circuit Board -74 13.1. Backend P.C.B. Assy -74 13.2. Main P.C.B. Assy (Side A)-75 13.3. Main P.C.B. Assy (Side B)-76 13.4. Panel, USB & Music Port P.C.B. -77 14 Voltage a

12、nd Waveform Measurement -79 14.1. Voltage Measurement-79 15 Exploded View and Replacement Parts List-87 15.1. Cabinet Parts Location 1-87 15.2. Cabinet Parts Location 2-88 15.3. Packaging-89 15.4. Mechanical Replacement Part List- 91 15.5. Electrical Replacement Parts List - 93 RadioFans.CN 收音机爱 好者资

13、料库 3 1Safety Precautions 1.1.General Guidelines 1. IMPORTANT SAFETY NOTICE 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 th

14、ese critical parts should be replaced with manufacturers specified parts 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

15、not isolated from the AC power line. Use a transformer of adequate power 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 servi

16、cing, observe the original lead dress. If a short circuit is found, replace 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 serv

17、icing, make the following leakage 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 plu

18、g and each exposed metallic 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 5.2M. When the exposed metal does not have a return path to the chassis, the reading mu

19、st be 1.1.2.Leakage Current Hot Check 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

20、pipe, as shown in Figure 1-1. 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.

21、6. The potential 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 haz

22、ard, and the equipment should be repaired and rechecked before it is returned to the customer. Figure 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 below diagram (in SMPS Module) through a 10 W, 10 W resis- tor to grou

23、nd. Figure 1-2 Caution: 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 220240 V, 50/60 Hz during Power ON, in FM mode

24、at volume minimal should be 850 mA. 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

25、, 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 the procedure outlines below: 1. Turn off the power. 2. Determine the cause of the proble

26、m 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. 5 1.4.Caution For AC Cord (For GS only) Figure 1-3 6 1.5.Power Supply using SMPS This model uses Switch

27、ing Mode Power Supply (SMPS) to provide the power supply to the unit. Here is the supplied part no. for the SMPS Module 1) N0AC2GK00001 Figure 1-4 1.6.Safety Parts Information Safety Parts List: There are special components used in this equipment which are important for safety. These parts are marke

28、d 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 hazards. Do not modify the original design without permission of manufacturer. SafetyRef No.Part No.

29、Part Name & DescriptionRemarks 13RGR0443V-A1AREAR PANELGA 13RGR0443V-B1AREAR PANELGS 13RGR0443V-C1AREAR PANELEE 25RKM0713-K1TOP CABINET 301RAE2405Z-VTRAVERSE UNIT A2K2CP2YY00061AC CORDGA A2K2CQ2YY00119AC CORD A2K2CT2YY00097AC CORDGS A3RQT9952-BO/I BOOK (En)GA/GS A3RQT9954-RO/I BOOK (Ru/Ur)EE A3RQT99

30、68-GO/I BOOK (Pe/Ar)GS PCB6N0AC2GK00001SMPS MODULE 7 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 Se

31、nsitive (ES) Devices. The following techniques 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 ea

32、rth 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 unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive s

33、urface 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. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected

34、)” 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. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it

35、. (Most replacement ES devices are packaged with 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

36、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 bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together

37、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.Precaution of Laser Diode Caution: This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pic

38、kup lens. Wavelength: 790 nm (CD)/655 nm (DVD) Maximum output 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 va

39、riable resistor on the pickup unit. It was already adjusted. 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at pickup lens for a long time. 8 Figure 2-1 2.3.General description about Lead Free Solder (PbF) The lead free solder has been used in the mounting proce

40、ss 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, 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 higher approx