Panasonic-SAAKX74P-cs-sm 电路图 维修手册.pdf

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1、 Panasonic Corporation 2012. All rights reserved. Unauthorized copying and distribution is a violation of law. PSG1203050CE CD Stereo System Model No.SA-AKX74PH SA-AKX74PN Product Color: (K).Black Type TABLE OF CONTENTS PAGEPAGE 1 Safety Precautions- 3 1.1. General Guidelines- 3 1.2. Before Use (For

2、 PH only)- 4 1.3. Before Repair and Adjustment- 4 1.4. Protection Circuitry- 4 1.5. Caution For Fuse Replacement- 4 1.6. Safety Parts Information - 5 2 Warning- 6 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive (ES) Devices - 6 2.2. Precaution of Laser Diode- 7 2.3. Servi

3、ce caution based on Legal restrictions- 8 2.4. Handling Precautions for Traverse Unit- 9 3 Service Navigation-11 3.1. Service Information -11 4 Specifications- 12 5 General/Introduction- 13 5.1. Media Information- 13 6 Location of Controls and Components- 14 6.1. Remote Control Key Button Operation

4、- 14 6.2. Main Unit Key Button Operation- 15 7 Installation Instructions - 16 7.1. Speaker and A/C Connection- 16 8 Service Mode- 17 8.1. Cold-Start - 17 8.2. Doctor Mode Table- 18 8.3. Reliability Test Mode (CD Mechanism Unit (BRS11C) - 21 8.4. Self-Diagnostic Mode - 22 8.5. Self-Diagnostic Error C

5、ode Table- 22 Please refer to the original service manual for: ? ? CD Mechanism Unit (BRS11C), Order No. PSG1201019AE ? ? Speaker system SB-AKX74PN-K, Order No. PSG1203052CE RadioFans.CN 收音机爱 好者资料库 2 8.6. Sales Demonstration Lock Function -23 9 Troubleshooting Guide-24 9.1. Part Location -24 9.2. Tr

6、oubleshooting Guide for F61 and/or F76-28 9.3. D-Amp IC Operation X: NG (In case that time out happens.) : Either one of FOAOC, TR AOC and FO coarse AGC is NG. : If theAGC is NG (ignore others). 2.To cancel, press 0 on remote control . 2.To cancel, press 0 on remote control . ROM Version (Display 1)

7、 (Display 2) Year Develop Year Develop ROM Type Version(Decimal) after 2 sec Version (Decimal )Checksum (Hex) 21 8.3.Reliability Test Mode (CD Mechanism Unit (BRS11C) Below is the process flow chart of the aging test for the CD Mechanism Unit (BRS11C). Fig. 1. Reliability Test (Loading) Fig. 2. Reli

8、ability Test (Traverse) Fig. 3. Reliability Test (Combination) OPEN Operation OPEN wait for 1 s CLOSE Operation CLOSE wait for 4 s Count up First Track Access First Track Play 5 s Last Track Access Last Track Play 5 s Count up First Track Access Access Play 10 s Open Operation Open wait for 1 s CLOS

9、E Operation Count up First Track Last Track Last Track Play 10 s 22 8.4.Self-Diagnostic Mode 8.5.Self-Diagnostic Error Code Table Self-Diagnostic Function (Refer Section 8.4. Self-Diagnostic Mode) provides information on any problems occurring for the unit and its respective components by displaying

10、 the error codes. These error code such as U*, H* and F* are stored in memory and held unless it is cleared. The error code is automatically display after entering into self-diagnostic mode. 8.5.1.Power Supply Error Code Table FL Display Key Operation Front Key Item Description Mode Name To enter in

11、to self diagnostic checking System will perform a check on any unusual/error code from the memory To clear the stored in memory (EEPROM IC) Self Diagnostic Mode Error code information Delete error code Step 1: Select CD mode (Ensure no disc is inserted). Step 2: Press & hold follow by / on main unit

12、 for 2 seconds. Step 1: In self diagnostic mode, Press on main unit. To exit, press /I on main unit or remote control. Step 1: In self diagnostic mode, Press 0 on remote control. To exit, press /I on main unit or remote control. Example: 23 8.5.2.CD Mechanism Error Code Table (CD Mechanism Unit (BRS

13、11C) 8.6.Sales Demonstration Lock Function 8.6.1.Entering into sales Demo Mode Here is the procedures to enter into Sales Demonstration Lock. Step 1: Turn on the unit. Step 2: Select to any mode function. Step 3: Press OPEN/CLOSE key then / key at the same time,press and hold both OPEN/CLOSE and / k

14、eys for 5 sec. Step 4: The display will show upon entering into this mode for 2 sec. Note: OPEN/CLOSE button is invalid and the main unit displays “LOCKED” while the lock function mode is entered. 8.6.2.Cancellation Step 1: Turn on the unit. Step 2: Select to any mode function. Step 3: Press OPEN/CL

15、OSE key then / key at the same time,press and hold both OPEN/CLOSE and / keys for 5 sec. Step 4: The display will show upon entering into this mode for 2 sec. Error CodeDiagnostic ContentsDescription of errorAutomatic FL DisplayRemarks CD H15CD Open AbnormalDuring operation POS_SW_R On fail to be de

16、tected with 4 sec. Error No. shall be clear by force or during cold start. Press on main unit for next error. CD H16CD Closing AbnormalDuring operation POS_SW_CEN On fail to be detected with 4 sec. Error No. shall be clear by force or during cold start. Press on main unit for next error. F26Communic

17、ation between CD servo LSI and micro-p abnormal. During switch to CD func- tion, if SENSE = “L” within failsafe time of 20ms. Press on main unit for next error. 24 9Troubleshooting Guide 9.1.Part Location 9.1.1.SMPS P.C.B. Fig. 1 SMPS P.C.B. Thermistor : TH5861 Photocoupler : PC5720 AC Inlet : P5701

18、 Fuse : F1 Photocoupler : PC5702, PC5799 Switching Regulator IC: IC5701 SMPS Control IC: IC5799 Main Transformer : T5701 Rectifier Diode : D5801, D5802 Connector: CN5802 Sub Transformer : T5751 Sub Transformer : D5798 25 9.1.2.Main P.C.B. (Front Side) Fig. 2 Main P.C.B. (Front Side) 26 Fig. 3 Main P

19、.C.B. (Back Side) Audio Digital Amp IC IC5800 Voltage Regulator IC IC2010 Resistor Defective R5803 Resistor Defective R5805 Audio Digital Amp IC IC5700 Regulator Circuit Q2022 D2004 Regulator Circuit L2000 L2001 Regulator Circuit Voltage Regulator IC IC2011 Resistor Defective R5802 Resistor Defectiv

20、e R5704 Resistor Defective R5705 Resistor Defective R5702 Resistor Defective R5703 Resistor Defective R5804 27 9.1.3.D-AMP P.C.B. Fig. 4 D-Amp P.C.B. Audio Digital Amp IC: IC5900 Resistor Defective R5905 Resistor Defective R5917 Resistor Defective R5922 Resistor Defective R5921 28 9.2.Troubleshootin

21、g Guide for F61 and/or F76 This section illustrates the checking procedures when upon detecting the error of “F61” and/or “F76” after power up of the unit. It is for purpose of troubleshooting and checking in SMPS, Main & D-Amp P.C.B. 5Switching Regulator 5IC5701 Faulty . 6 T5751 Faulty. Switching M

22、ode Power Supply Control IC (IC5799) faulty. Set can ON1Speaker Output1Faulty speaker unit, Loose connection, Short. then F61 2D-AMP circuit D-AMP IC, IC5700, IC5800, IC5900 defective. (Check DC voltage at speaker terminals, 3V and above defective) DC Voltage ok but no sound, check DC Voltage at Pin

23、 1 . 2a, 2b ok but no sound, check PWM waveform at Pin 10 and Pin 14 . If no PWM, 12 resistors defective. Set can ON 1Main Transformer T5701Short circuit between Pin 11 and Pin 12 . then F76 1b Short circuit between Pin 13 and Pin 14 . 1c Short circuit between Pin 16 and Pin 17 . 2 2 Regulator Circu

24、its 2a 2b 2c 3 Q2022 faulty (No +5V output). 2d IC2014 faulty (No +3.3V output). 2e IC2011 faulty (No +5V output). 2fL2001 Open. 3Photocoupler PC5720 solder crack, PC5720 Dry joint, short circuit, open circuit. 1Rectifier Diode D5801Improper contact between D5801 to Heatsink. Rectifier Diode D5802 T

25、H5861 Improper contact between D5802 to Heatsink. Thermistor TH5860,1b Set trigger temperature protection. Set can ON working normally for some time then F76 SymptomRemarks Set cannot ON1AC Cord1AC Cord Faulty, Loose connection. 2 3Fuse, F13Fuse, F1 Open. 4Photocoupler4PC5702/PC5799 solder crack. PC

26、5702, PC5799Dry joint, short circuit, open circuit. IC2010 faulty (No +9V output). L2000 Open. Possible Fault(s)Checking Items AC Inlet, P5701P5701 solder crack, dry joint. IC, IC5701 Main Transformer T5751 2 1a Refer to Section 9.1.1 Fig. 1. SMPS P.C.B. Refer to Section 9.1.2 Fig. 2. and Fig.3. Mai

27、n P.C.B. Refer to Section 9.1.1 Fig. 1. SMPS P.C.B. Refer to Section 9.1.1 Fig. 1. SMPS P.C.B. Refer to Section 9.1.2 Fig. 3. Main P.C.B. and Section 9.1.3 Fig. 4. D-Amp P.C.B. Refer to Section 9.1.1 Fig. 1. SMPS P.C.B. 2b 2a 5V ok condition, 2.5V or 0V defective. 2c 1a 6a 6b D5798 faulty.6c For IC5

28、800 (R5802, R5803, R5804, R5805). For IC5700 (R5702, R5703, R5704, R5705). For IC5900 (R5905, R5917, R5921, R5922). 29 9.3.D-Amp IC Operation & Control 30 1170 1250 H 350 1260 1450 L 301 1460 1540 H 350 1550 1710 L 301 Table 4: F_HOP Control during 10 kHz Step Note: During activating, the 3 control

29、pins namely MUTE_F, MUTE_A and MODE_DA must be used to cover the “Pop” sound cause by F-HOP switching. 31 10 Service Fixture & Tools Prepare service tools before process service position. Ref. NoService ToolsRemarks SFT1Main P.C.B. (CN2007) - SMPS P.C.B. (CN5802)REX1527(15P Cable Wire) 32 11 Disasse

30、mbly and Assembly Instructions Illustration is based on SA-AKX74PH-K. Caution Note: This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main compo- nents for the unit. (You may refer to the section of “Main components and P.C.B Locations” as descr

31、ibed in the service manual) Before carrying out the disassembly process, please ensure all the safety precautions & procedures are followed. During the disassembly and/or assembly process, please handle with care as there may be chassis components with sharp edges. Avoid touching heatsinks due to it

32、s high temperature after prolong use. (See caution as described below) During disassembly and assembly, please ensure proper service tools, equipments or jigs is being used. During replacement of component parts, please refer to the section of “Replacement Parts List” as described in the ser- vice m

33、anual. Select items from the following indexes when disassembly or replacement are required. Disassembly of Top Cabinet Disassembly of Front Panel Unit Disassembly of Mic P.C.B. Disassembly of Panel P.C.B. Disassembly of Memory LED P.C.B. Disassembly of Remote Sensor P.C.B. Disassembly of USB P.C.B.

34、 Disassembly of Music Port P.C.B. Disassembly of Top Bar LED P.C.B. Disassembly of Bottom Bar LED P.C.B. Disassembly of Main P.C.B. Replacement of Voltage Regulator (IC2010) Replacement of Voltage Regulator (IC2011) Replacement of Audio Digital Amp IC (IC5800) Replacement of Audio Digital Amp IC (IC

35、5700) Disassembly of D-Amp P.C.B. Replacement of Audio Digital Amp (IC5900) Disassembly of SMPS P.C.B. Replacement of Switching Regulator IC (IC5701) Replacement of Rectifier Diode (D5702) Replacement of Rectifier Diode (D5801) Replacement of Rectifier Diode (D5802) Replacement of Rectifier Diode (D

36、5803) Disassembly of CD Mechanism Unit (BRS11C) Disassembly of CD Interface P.C.B. Disassembly of CD Servo P.C.B. Disassembly of Rear Panel Disassembly of Voltage Selector P.C.B. 33 11.1.Disassembly Flow Chart 11.3.Top Cabinet 11.13. Main P. C.B. 11.26. CD Mechanism Unit (BRS11C) 11.29. Rear Panel C

37、D Servo P.C.B. 11.28. CD Interface P.C.B. 11.27. 11.30. Voltage Selector P. C.B. 11.4. Front Panel Unit 11.6. Memory LED P.C.B.11.7. Panel P. C. B . 11.5. Mic P.C.B. 11.8. Remote Sensor P.C.B. 11.9. USB P. C.B. 11.10. Music Port P. C.B. 11.11. Top Bar LED P.C.B. 11.12. Bottom Bar LED P.C.B. 11.14. V

38、oltage Regulator IC (IC2010) 11.15. Voltage Regulator IC (IC2011) 11.16 Audio Digital Amp IC (IC5800) 11.17 Audio Digital Amp IC (IC5700) 11.20. SMPS P.C.B. 11.21. Switching Regulator IC (IC5701) 11.22. Rectifier Diode (D5702) 11.23. Rectifier Diode (D5801) 11.24. Rectifier Diode (D5802) 11.25. Rect

39、ifier Diode (D5803) 11.18. 11.19. D-Amp P.C.B. Audio Digital Amp IC (IC5900) 34 11.2.Main Components and P.C.B. Locations 35 11.3.Disassembly of Top Cabinet Step 1 Remove 2 screws on each side. Step 2 Remove 5 screws. Step 3 Slightly pull both side of Top Cabinet outwards as arrow shown. Step 4 Slig

40、htly lift up both side of Top Cabinet in an outward direction as shown. Step 5 Remove the Top Cabinet. Caution: During assembling, ensure that the catches of the Top Cabinet catches are properly located & inserted into the Front Panel Unit as shown. 36 11.4.Disassembly of Front Panel Unit Refer to “

41、Disassembly of Top Cabinet”. Step 1 Detach 27P FFC at the connector (CN2003) on Main P.C.B. Step 2 Detach 5P Cable Wire at the connector (CN2700) on Main P.C.B. Step 3 Remove 1 screw at the SMPS Inner Chassis Unit. Step 4 Push inwards slightly at the Bottom Chassis as arrow shown and release tab at

42、left side of the Front Panel Unit. Step 5 Release tabs at the bottom of the unit. 37 Step 6 Push inwards slightly at the Bottom Chassis and release tab at right side of the Front Panel Unit. Step 7 Remove the Front Panel Unit 11.5.Disassembly of Mic P.C.B. Refer to “Disassembly of Top Cabinet”. Refe

43、r to “Disassembly of Front Panel Unit”. Step 1 Remove the Mic knob. Step 2 Remove 1 screw at the Mic P.C.B. Step 3 Desolder 4P Cable Wire at the connector (ZJ6500) at the Mic P.C.B. Step 4 Release 1 catch. Step 5 Remove the Mic P.C.B. 38 11.6.Disassembly of Panel P.C.B. Refer to “Disassembly of Top

44、Cabinet”. Refer to “Disassembly of Front Panel Unit”. Refer to “Disassembly of Mic P.C.B.”. Step 1 Remove the Volume Knob. Step 2 Remove the Skip Knob. Step 3 Remove 6 screws. Step 4 Detach 2P Cable Wire at the connector (CN6006) on the Panel P.C.B. Step 5 Detach 2P Cable Wire at the connector (CN60

45、04) on the Panel P.C.B. Step 6 Release catches by following the sequences (1-11). Step 7 Lift up to remove the Panel P.C.B. Step 8 Desolder 4P Cable Wire at the connector (ZJ6002) on the Panel P.C.B. 39 Caution: During assembling, ensure that the Panel P.C.B. is seated properly through the guides & fully catched. 11.7.Disassembly of Memory LED P.C.B. Refer to “Disassembly of Top Cabinet”. Refer to “Disassembly of Front Panel Unit”. Refer to “Disassembly of Panel P.C.B.”. Step 1 Release 2 catches. 11.8.Disassembly of Remote Sensor P.C.B. Refer to “Disassembly of Top Cabinet”. Ref