Panasonic-SAPM250PC-cs-sm 电路图 维修手册.pdf

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1、 Panasonic Corporation 2015. All rights reserved. Unauthorized copying and distribution is a violation of law. PSG1504006AE A6 CD Stereo System Model No.SA-PM250PC Product Color: (S).Silver Type TABLE OF CONTENTS PAGEPAGE 1 Notes - 3 2 Safety Precautions- 4 2.1. General Guidelines- 4 2.2. Before Rep

2、air and Adjustment- 5 2.3. Protection Circuitry- 5 2.4. Caution For Fuse Replacement- 5 2.5. Safety Part Information- 5 3 Warning -6 3.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices -6 3.2. Precaution of Laser Diode-7 3.3. Service caution based on Legal re

3、strictions -8 3.4. Handling Precaution for Traverse Unit-9 4 Specifications- 11 Notes: Please use this manual together with service manual Model No.SA-PM250EG-S Order no. PSG1403006CE & SB-PM02EG1-K, Order No. PSG1206013AE. RadioFans.CN 收音机爱 好者资料库 2 5 Location of Controls and Components-12 5.1. Main

4、 Unit & Remote Control Key Button Operations -12 6 Block Diagram -13 6.1. SERVO & SYSTEM CONTROL BLOCK DIAGRAM-13 6.2. POWER SUPPLY DIAGRAM -14 7 Wiring Connection Diagram-15 8 Schematic Diagram-17 8.1. Schematic Diagram Notes-17 8.2. CD INTERFACE & MAIN (MICON) CIRCUIT (1/2)-19 8.3. MAIN (MICON) CI

5、RCUIT (2/2)-20 8.4. MAIN (SUPPLY) CIRCUIT-21 8.5. MAIN (DAMP) CIRCUIT-22 8.6. MAIN (CD MOTOR DRIVER) CIRCUIT-23 8.7. MAIN (USB) & TUNER CIRCUIT -24 8.8. PANEL, VOLUME & BUTTON CIRCUIT-25 8.9. SMPS CIRCUIT -26 9 Printed Circuit Board -27 9.1. CD INTERFACE & TUNER P.C.B.-27 9.2. MAIN P.C.B. (Side A)-2

6、8 9.3. MAIN P.C.B. (Side B)-29 9.4. PANEL, VOLUME & BUTTON P.C.B.-30 9.5. SMPS P.C.B. -31 10 Exploded View and Replacement Parts List-32 10.1. Cabinet Parts Location-32 10.2. Packaging-33 10.3. Mechanical Repacement Parts List-35 10.4. Electrical Replacement Parts List-37 RadioFans.CN 收音机爱 好者资料库 3 1

7、Notes This service manual contains technical information which will allow service personnels to 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 se

8、rvice manual to be filed with original service manual. 1) This service manual does not contains the following information This simplified service manual is base on SA-PM250EG-S. Please refer to the original service manual, SA-PM250EG-S (Order No. PSG1403006CE) for the below mention contents. - Servi

9、ce Navigation - Service Mode - Troubleshooting Guide - Disassembly and Assembly Instructions - Service Position - Voltage Measurement 2) This service manual contains the following information - Safety Precautions - Warning - Specifications - Location of Controls and Components - Block Diagram - Wiri

10、ng Connection Diagram - Schematic Diagram - Printed Circuit Board - Exploded View and Replacement Parts List RadioFans.CN 收音机爱 好者资料库 4 2Safety Precautions 2.1.General Guidelines 1. IMPORTANT SAFETY NOTICE There are special components used in this equipment which are important for safety. These parts

11、 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 prevent X-RADIATION, shock, fire, or other hazards. Do not modify the original design without

12、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 as this protects the technician from accidents resulting in personal injury from electrica

13、l 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 parts which have been overheated or damaged by the short circuit. 4. After servicing, see

14、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 being exposed to shock hazards. 2.1.1.Leakage Current Cold Check 1. Unplug the AC cord and c

15、onnect 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 shafts, etc. When the exposed metallic part has a return path to the chas

16、sis, the reading should be between 1M and 5.2M. When the exposed metal does not have a return path to the chas- sis, the reading must be 2.1.2.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 re

17、sistor, 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 measure the potential across the resistor. 4. Check each exposed metall

18、ic 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 Model 229 or equivalent) may be used to make the hot checks, leakage cu

19、rrent 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. 2-1 5 2.2.Before Repair and Adjustment Disconnect AC power, discha

20、rge AC Capacitors (C1702, C1710, C1725, C1727 and C1728) through a 10W, 1W resistor to ground. 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 over

21、current. Current consumption at AC 120V, at 60Hz in NO SIGNAL mode (at volume minimum in FM mode) should be 200 mA. 2.3.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

22、 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 than the indicated rated impedance of the amplifier are used. If this occurs, follow the procedu

23、re 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 will not operate unless the power is first turned off and then on again. 2.4.Caution For Fuse Repl

24、acement 2.5.Safety Part Information Safety 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 ma

25、nufacturers specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer. SafetyRef. No.Part No.Part Name & DescriptionRemarks 23RGN3453H-KNAME PLATE 29RMV0442SMPS COVER SHEET 301RAE1028Z-VTRAVERSE UNIT(E.S.D) A2K2CB2CB00022AC CORD A3R

26、QT0A12-CO/I BOOK (En, Cf) PCB5REP5170BASMPS P.C.B.(RTL) L1702G0B922G00002LINE FILTER T1700G4DYZ0000077SWITCHING TRANSFORMER PC1702B3PBA0000579PHOTO COUPLER F1700K5G202Y00006FUSE P1751K2AB2B000007AC INLET C1702F0CAF224A1050.22uF C1710F1BAF471A013470pF C1725F0CAF104A1050.1uF C1727F1BAF10200201000pF C1

27、728F1BAF10200201000pF R1724ERJ12YJ105U1M 1/10W R1726ERJ12YJ105U1M 1/10W Z1752D4EAY511A182VARISTOR 6 3Warning 3.1.Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi- tive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such compon

28、ents 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 handling any semiconductor component or semiconductor-equipped assembly, drain

29、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 unit under test. 2. After removing an electrical assembly equipped with E

30、S 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. Use only an anti-static solder removal device. Some solder removal device

31、s 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. Do not remove a replacement ES device from its protective package until

32、 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 removing the protective material from the leads of a replacement ES device

33、, 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 bodily motions when handling unpackaged replacement ES devices. (Otherwise

34、 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). 7 3.2.Precaution of Laser Diode Caution: This product utilizes a laser diode with the unit turned on, in

35、visible laser radiation is emitted from the pickup lens. Wavelength: 790 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 disassemble the pickup unit, since radiation from exposed laser diode is

36、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. Figure. 3-1 CAUTION! THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PE

37、RFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. 8 3.3.Service caution based on Legal restrictions 3.3.1.General description about Lead Free Solder (PbF) The lead free solder has been used in the mounting process of all electrical components on th

38、e 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 t

39、he 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 Free Solder (PbF) The lead free solder has to be used when repairing the equipment for which the lead free solder is u

40、sed. (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. Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC. Since the melting point of th

41、e 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 control after setting the temperature at 35030 degrees C (66286F). Recommended Lead Free Solder (Service Parts

42、 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 * Ingredient: Tin (Sn), 96.5%, Silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3% Th

43、e letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder. (See right figure) 9 3.4.Handling Precaution 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 ta

44、ken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the Traverse Unit. 3.4.1.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

45、. Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode. 1. Do not give a considerable shock to the 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 excessive force is applied to it.