Panasonic-SAAK785LMK-cs-sm 电路图 维修手册.pdf

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1、 Panasonic Corporation 2009. All rights reserved. Unauthorized copying and distribution is a violation of law. MEX0911001CE CD Stereo System Mode Rev. 01 l No.SA-AK785LM-K Product Color: (K).Black Type Notes: This models CD Mechanism Unit (CR14C). Please refer to the Original Service Manual (Order N

2、o. MD0805031CE) for this CD Mechanism Unit. Nota: El idioma original de este Manual de Servicio es en idioma ingls, sin embargo algunas notas aqu mencionadas sern escritas en espaol para mejor descripcin para Centros de Servicio de Mxico. SH-FX785 SB-AK785SB-AK785SB-AK780SB-AK780SA-AK785 RadioFans.C

3、N 收音机爱 好者资料库 TABLE OF CONTENTS 1 Safety Precautions 1.1. General Guidelines 1.3. Caution For Fuse Replacement 1.4. Before Repair and Adjustment 1.5. Protection Circuitry 1.6. Safety Parts Information 2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive (ES) Devices 2

4、.2. Precaution of Laser Diode 2.3. Service caution based on Legal restrictions 2.4. Handling Precautions for Traverse Unit 3 Service Navigation 3.1. Service Information 4 Specifications 5 Location of Controls and Components 5.1. Main Unit Key Button Operation 5.2. Remote Control Key Button Operation

5、 5.3. Disc Information 6 Self-Diagnosis and Special Mode Setting 6.1. Doctor Mode Summary Table 6.2. Doctor Mode Table 6.3. Service Mode Summary Table 6.4. Service Mode Table 6.5. Reliability Test Mode (CD Mechanism Unit CR14C) 6.6. Error Code Table 7 Troubleshooting Guide 7.1. Jupiter USB 7.2. Trou

6、bleshooting Guide 7.3. Troubleshooting Guide for F61 and/or F76 8 Service Fixture & Tools 8.1. Service Tools and Equipment 9 Disassembly and Assembly Instructions 9.1. Disassembly Flow Chart 9.2. Main Components and P.C.B. Locations 9.3. Disassembly of Top Cabinet 9.4. Disassembly of CD Mechanism Un

7、it (CR14C) 9.5. Disassembly of Rear Panel 9.6. Disassembly of Fan Unit 9.7. Disassembly of Front Panel Assembly 9.8. Disassembly of Mic P.C.B. 9.9. Disassembly of Panel P.C.B. 9.10. Disassembly of Dynamic Bass Knob & Dynamic Bass Button Unit 9.11. Disassembly of Memory P.C.B. 9.12. Disassembly of MP

8、ort/Headphone P.C.B. 9.13. Disassembly of CD Servo P.C.B. 9.14. Disassembly of D-Amp P.C.B. & Fan 9.15. Replacement of Audio Digital Amp IC (IC5400) 9.16. Replacement of Audio Digital Amp IC (IC5000) 9.17. Replacement of Audio Digital Amp IC (IC5200) 9.18. Disassembly of Main P.C.B. 9.19. Disassembl

9、y of SMPS P.C.B. 9.20. Replacement of Switching Regulator IC 9.21. Replacement of Rectifier Diode (D5702) 9.22. Replacement of Regulator Diode (D5801) 9.23. Replacement of Regulator Diode (D5802) 9.24. Replacement of Regulator Diode (D5803) 9.25. Disassembly of AC Inlet P.C.B. 9.26. Disassembly of J

10、upiter P.C.B. 9.27. Replacement of Traverse Unit Assembly 9.28. Disassembly of CD Lid 10 Service Position 10.1. Checking and Repairing of Main P.C.B. 10.2. Checking and Repairing of Panel P.C.B., MIC P.C.B., Jupiter P.C.B. and MPort/Headphone P.C.B. 10.3. Checking and Repairing of D-Amp P.C.B. 10.4.

11、 Checking and Repairing of SMPS P.C.B. and AC Inlet P.C.B. 11 Voltage & Waveform Chart 11.1. CD Servo P.C.B. 11.2. Main P.C.B. (1/3) 11.3. Main P.C.B. (2/3) 11.4. Main P.C.B. (3/3) 11.5. Panel P.C.B. 11.6. D-Amp P.C.B. 11.7. Jupiter P.C.B. (1/2) 11.8. Jupiter P.C.B. (2/2) 11.9. Mic P.C.B. 11.10. SMP

12、S P.C.B. 11.11. Waveform Table (1/3) 11.12. Waveform Table (2/3) 11.13. Waveform Table (3/3) 12 Illustration of ICs, Transistor and Diode 13 Block Diagram 13.1. CD Servo Block Diagram 13.2. Jupiter Block Diagram 13.3. Main(1/2) Block Diagram 13.4. Main(2/2) Block Diagram 13.5. Panel / MPort/Headphon

13、e / Mic / Memory Block Diagram 13.6. D-Amp Block Diagram 13.7. SMPS / AC Inlet Diagram 14 Wiring Connection Diagram 15 Schematic Diagram Notes 16 Schematic Diagram 16.1. CD Servo Circuit 16.2. Main Circuit (1/6) 16.3. Main Circuit (2/6) 16.4. Main Circuit (3/6) 16.5. Main Circuit (4/6) 16.6. Main Ci

14、rcuit (5/6) 16.7. Main Circuit (6/6) 16.8. Panel Circuit (1/2) 16.9. Panel Circuit (2/2) 16.10. Memory / MPort/Headphone / Mic Circuit RadioFans.CN 收音机爱 好者资料库 16.11. D-Amp Circuit (1/2) 16.12. D-Amp Circuit (2/2) 16.13. Jupiter Circuit (1/4) 16.14. Jupiter Circuit (2/4) 16.15. Jupiter Circuit (3/4)

15、16.16. Jupiter Circuit (4/4) 16.17. SMPS Circuit (1/2) 16.18. SMPS Circuit (2/2 16.19. AC Inlet Circuit 17 Printed Circuit Board 17.1. CD Servo / Jupiter P.C.B. 17.2. Main P.C.B. 17.3. Panel / Memory / MPort/Headphone / Mic P.C.B. 17.4. D-Amp P.C.B. 17.5. SMPS/ AC Inlet P.C.B. 18 Terminal Function o

16、f ICs 18.1. IC2801 (MN101EF16KXW): IC Microprocessor 18.2. IC6601(C0HBB0000057): IC FL Driver 19 Exploded View and Replacement Parts List 19.1. Exploded View and Mechanical Replacement Parts List 19.2. Electrical Replacement Part List RadioFans.CN 收音机爱 好者资料库 4 1Safety Precautions 1.1.General Guideli

17、nes 1. When servicing, observe the original lead 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 install

18、ed. 3. After servicing, carry out 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, betwe

19、en the jumpered AC plug 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 c

20、hassis, 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 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 g

21、round 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. 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

22、above measurements. 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 possib

23、ility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer. Figure 1 1.2.Before Use (For PH only) Be sure to disconnect the mains cord before adjusting the voltage selector. Use a minus(-) screwdriver to set the voltage selector (on the rear pan

24、el) to the voltage setting for the area in which the unit will be used. (If the power supply in your area is 110V 127V or 220V 240V, set to the “110V 127V or 220V 240V” position.) Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for s

25、ome countries, the correct voltage is already set.) 1.3.Caution For Fuse Replacement 1.4.Before Repair and Adjustment Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5704, C5705, C5706, C5707) through a 10 ? , 10 W resistor to ground. Caution: DO NOT SHORT-CIRCUIT

26、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 110V127V / 220V240V, 50/60 Hz in NO SIGNAL mode volume minimal should be 500 mA (For PH onl

27、y). Current consumption at AC 120V, 60 Hz in NO SIGNAL mode volume minimal should be 500 mA (For PN only). 1.5.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 perfor

28、mance. 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 the procedure outl

29、ines 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. 1.6.Safety Parts Information Saf

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

31、other hazards. Do not modify the original design without permission of manufacturer. Modelo:SC-AK785LM-K Safety INSTRUCTIVORQTM0171 RKMX0144Z-KL RD-DAC060-PX CAPACITOR DE ACF1BAF1020020 K2AA2B000017 ETS48AB12GAC CAPACITOR DE AC CAPACITOR DE AC F0CAF334A087 PCB SMPS F0CAF224A085 B3PBA0000402 RJBX0562

32、T-1 GAB. MET. SIN DOBLAR K5G4013A0001 REAR PANEL Numero de Parte TRANSFORMADOR DE PODER TRANSFORMADOR DE RESPALDO OPTOACOPLADOR LECTOR PTICO (CD UNIT) RESISTENCIA FUSIBLE FUSIBLE PRIMARIO BOBINA PRIMARIOELF22V035B SMPS FX785N0AE6GY00001 Nombre del componente SJA168-1A ETS19AB256AG K5D802APA008 CABLE

33、 TOMACORRIENTE. CONECTOR TOMACORRIENTE RGRX0070R-AL 7 2Warning 2.1.Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically Sensiti

34、ve (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 component damage caused by electrostatic discharge (ESD). 1. Immediately before handlin

35、g 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 u

36、nit 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. U

37、se 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. 6.

38、 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 re

39、moving 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 bo

40、dily 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). 8 2.2.Precaution of Laser Diode

41、Caution: This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens. Wavelength: 795 nm (CD) 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

42、 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. 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at pickup lens for a long time. 9 2.3.Service

43、caution based on Legal restrictions 2.3.1.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 circuit boards used for this equipment in considering the globally environmental conservation. The normal

44、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.30 degrees C (86F) more than that of the normal solder. Definition of PCB Lead

45、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 letter of “PbF” is printed on the PCB using the lead free solder.) To put lead free solder, it

46、 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 higher than that of the normal lead solder, it takes the longer time to melt the lead free sol

47、der. 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 3 types of lead free solder are available through the service parts route. RFKZ03D01K-(0.3mm

48、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% The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder. (See right f

49、igure) 10 2.4.Handling Precautions 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 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 elect