Technics-SAEH570-rec-sm 电路图 维修手册.pdf

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1、Table Of Contents COVER 1 Before Repairs 2 Protection Circuitry 3 Accessories 4 Caution for AC Mains Lead 5 Location of Controls 6 Operation Checks and Component Replacement Procedures 6.1 Checking for the AC IN P.C.B. 6.2 Checking for the operation P.C.B. 6.3 Checking for the main P.C.B. 6.4 Replac

2、ement for the regulator transistor 6.5 Replacement for the power IC 7 To Supply Power Source 8 Self-Diagnostic Function 8.1 To display the malfunction code 8.2 To return to the normal display 8.3 Display contents 8.3.1 U70 CD, U70 DECK (displayed automatically) 8.3.2 F61 9 Schematic Diagram Notes 10

3、 Schematic Diagram 11 Printed Circuit Board Diagram 12 Type Illustration of ICs, Transistors and Diodes 13 Wiring Connection Diagram 14 Block Diagram 15 Terminal Function of ICs 15.1 IC901 (C2BBFD000297):System ControlFL Drive 16 Replacement Parts List 17 Cabinet Parts Location 18 Packaging Service

4、Manual TOP NEXT AD0102030C2 Tuner/Amplifier G SA-EH570 Colour (S).Silver Type Areas (E).Europe. (EB).Great Britain. (EG).Germany, Italy, France, Netherlands and Denmark. (EP).East Europe and CIS. 2001 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution

5、 is a violation of law. RadioFans.CN 收音机爱 好者资料库 1 Before Repairs TOP PREVIOUS NEXT 1. Turn off the power supply. Using a 10 , 10 W resistor, connect both ends of power supply capacitors (C701, C703 and C702, C704) in order to discharge the voltage. 2. Before turning the power supply on, after comple

6、tion of repair, slowly apply the primary voltage by using a power supply voltage controller to make sure that the consumed current at 50 Hz in NO SIGNAL mode should be shown below with respectto supply voltage 230/240 V. Power supply voltageAC 230 V AC 240 V Consumed current 50 Hz70 300 mA TOP PREVI

7、OUS NEXT RadioFans.CN 收音机爱 好者资料库 2 Protection Circuitry TOP PREVIOUS NEXT The protection circuitry may have operated if either of the following conditions is noticed: G No sound is heard when the power is switched ON. G Sound stops during a performance. The functions of this circuitry is to prevent

8、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 this unit are used. If this occurs, follow the procedures outlined below. 1. Switch OFF the power. 2. Determine the cau

9、se of the problem and correct it. 3. Switch ON the power once again. Note: When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again. TOP PREVIOUS NEXT RadioFans.CN 收音机爱 好者资料库 3 Accessories TOP PREVIOUS NEXT G AC power supply cord for

10、 (E), (EG), (EP) areas/(RJA0019-1X).1 pc. G AC power supply cord for (EB) area/(RJA0053-2X).1 pc. G AM loop antenna set/(RSA0022-L).1 pc. G FM indoor antenna/(RSA0007).1 pc. G Speaker cords/(REE0853).2 pcs./(REE1057).2 pcs. G Remote control transmitter/(EUR7702070).1 pc. G Remote control batteries/(

11、R6/LR6, “AA”, UM-3).2 pcs. Note: These are available on sales route. G Antenna plug adaptor for (EB) area only/(SJP9009).1 pc. TOP PREVIOUS NEXT 4 Caution for AC Mains Lead TOP PREVIOUS NEXT TOP PREVIOUS NEXT 5 Location of Controls TOP PREVIOUS NEXT TOP PREVIOUS NEXT 6 Operation Checks and Component

12、 Replacement /Procedures TOP PREVIOUS NEXT G This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. G For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures ar

13、e described only when required. 6.1 Checking for the AC IN P.C.B. 6.2 Checking for the operation P.C.B. 6.3 Checking for the main P.C.B. 6.4 Replacement for the regulator transistor 6.5 Replacement for the power IC TOP PREVIOUS NEXT 6.1 Checking for the AC IN P.C.B. TOP PREVIOUS NEXT G Check the AC

14、IN P.C.B. as shown below. TOP PREVIOUS NEXT 6.2 Checking for the operation P.C.B. TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6.1. G Check the operation P.C.B. as shown below. 6.3 Checking for the main P.C.B. TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6.1. G Follow the

15、 (Step 1) - (Step 6) of item 6.2. G Check the main P.C.B. as shown below. TOP PREVIOUS NEXT 6.4 Replacement for the regulator transistor TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6.1. TOP PREVIOUS NEXT 6.5 Replacement for the power IC TOP PREVIOUS NEXT G Follow the (Step 1) - (Step

16、3) of item 6.1. G Follow the (Step 1) - (Step 6) of item 6.2. G Follow the (Step 1) - (Step 10) of item 6.3. TOP PREVIOUS NEXT 7 To Supply Power Source TOP PREVIOUS NEXT This unit SA-EH570 is designed to operate on power supplied form system connected. /For system connection, refer to Fig. 7-1. Fig.

17、 7-1. When the unit SA-EH570 has to test and service alone, use the following method to supply power source. 1. Short the section between W902A Pin 3 and C740 (-) (GND). (Refer to Fig. 7-2. ) 2. Connect this unit to an AC power supply cord./(This unit come to stand-by mode.) 3. Turn the unit ON. Fig

18、. 7-2. Notes: Use only this method when checking the voltage etc./In case of checking the operations, use the system connections to supply power source. TOP PREVIOUS NEXT 8 Self-Diagnostic Function TOP PREVIOUS NEXT This unit is equipped with a self-diagnostic function which, in the event of a malfu

19、nction, automatically displays a code indicating the nature of the malfunction. Use this self-diagnostic function when servicing the unit. 8.1 To display the malfunction code 8.2 To return to the normal display 8.3 Display contents 8.3.1 U70 CD, U70 DECK(displayed automatically) 8.3.2 F61 TOP PREVIO

20、US NEXT 8.1 To display the malfunction code TOP PREVIOUS NEXT G U70 CD:/U70 DECK: Automatically displays on the tuner/amplifier when a malfunction occurs. Refer to Fig. 8-1. G F61: Automatically displays on the tuner/amplifier when a malfunction occurs. Refer to Fig. 8-1. Fig. 8-1. TOP PREVIOUS NEXT

21、 8.2 To return to the normal display TOP PREVIOUS NEXT 1. For U70 CD/U70 DECK H Press an any operation button on the tuner/amplifier. H To re-display the code, switch the power off (POWER STANDBY button), and then switch power back on again. 2. For F61 H If F61 is displayed, the power will automatic

22、ally be switched off and the standby indicator will light up. H F61 will be displayed for 3 seconds, and then the clock will be displayed. H To re-display the code, switch the power on. F61 will be re-displayed, and then after 3 seconds the clock will be displayed and the power will automatically sw

23、itch off. TOP PREVIOUS NEXT 8.3 Display contents TOP PREVIOUS NEXT 8.3.1 U70 CD, U70 DECK(displayed automatically) 8.3.2 F61 TOP PREVIOUS NEXT 8.3.1 U70 CD, U70 DECK/(displayed automatically) TOP PREVIOUS NEXT G Problem or condition A bus-line communications error has occurred as a result of the fla

24、t cables being inserted incorrectly, thus preventing the system from operating. H If U70 is displayed on the tuner/amplifier, the tape deck or CD Player cannot be operated by remote control. G Correction Procedure 1. To check for correct insertion of flat cables. I Insert each connectors until you h

25、ear a click. I Insert the flat cables at the back of the unit in the order indicated. Refer to Fig. 8- 2. Make sure the white side of the cables is on your right side. Refer to Fig. 8-3. Fig. 8-2. Fig. 8-3. G Breakage of flat cables. (Check and replace.) G If the problem is not corrected by items 1

26、and 2 above, this indicates a faulty IC. SA-EH570: IC901 (C2BBFD000297) SL-EH570: IC451 (M38504E6225F) RS-DV250: IC701 (M38503M2406F) Check these ICs and replace. TOP PREVIOUS NEXT 8.3.2 F61 TOP PREVIOUS NEXT G Problem or condition When the power switch is switched on, it automatically switches back

27、 off, making it impossible to switch power on. G Correction procedure Faulty Tuner/Amplifier (SA-EH570) output IC (IC601). (When a DC voltage is applied to speaker terminals.) TOP PREVIOUS NEXT 9 Schematic Diagram Notes TOP PREVIOUS NEXT G This schematic diagram may be modified at any time with the

28、development of new technology. Notes: G S901: Power standby/on switch ( /I) G S902: Clock/timer switch (CLOCK/TIMER) G S903: Demo switch ( DEMO) G S904: Play timer/record timer switch/( PLAY/ REC) G S905: FM mode switch/(FM AUTO/MONO) G S906: Tuning mode switch/(TUNING MODE) G S907: Set switch (SET)

29、 G S908: Source input switch/(INPUT SELECTOR) G S910: Tuning down switch (TUNING, ) G S911: Tuning up switch (TUNING, ) G S912: Tuner/band switch (TUNER/BAND) G S913: Digital super woofer switch/(DIGITAL S.WOOFER) G S914: RDS display mode PS switch/(RDS DISP MODE-PS)/ Except for (EB) area G S915: RD

30、S display mode PTY switch/(RDS DISP MODE-PTY)/ Except for (EB) area G VR901: Volume control VR (VOLUME) G Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some er

31、rors in the voltage values, depending on theinternal impedance of the DC circuit tester. H No mark : Power ON (FM or AM) G Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resis

32、tors), high-quality sound (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturers specified parts shown in the parts list. G The supply part number is described alone in the replacement parts list. G Caution! IC and LSI are sensitive to

33、 static electricity. Secondary trouble can be prevented by taking care during repair. Cover the parts boxes made of plastics with aluminum foil. Ground the soldering iron. Put a conductive mat on the work table. Do not touch the legs of IC or LSI with the fingers directly. G Voltage and signal line

34、H : Positive voltage line H : Negative voltage line H : AM signal line H : AM OSC signal line H : FM signal line H : FM OSC signal line H : Audio signal line TOP PREVIOUS NEXT 10 Schematic Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 11 Printed Circuit Board Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEX

35、T 12 Type Illustration of ICs, Transistors and Diodes TOP PREVIOUS NEXT TOP PREVIOUS NEXT 13 Wiring Connection Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 14 Block Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 15 Terminal Function of ICs TOP PREVIOUS NEXT 15.1 IC901 (C2BBFD000297):System Control/FL Dr

36、ive TOP PREVIOUS NEXT 15.1 IC901 (C2BBFD000297):/System Control/FL Drive TOP PREVIOUS NEXT Pin No.Terminal NameI/OFunction 1CHECKIClock check signal input 2LC72 DIOPLL data signal output for tuner unit (Z120) 3LC72 CEOChip enable signal output for tuner unit (Z120) 4LC72 DI/STIIF count data/stereo d

37、etect signal input from tuner unit (Z120) 5LC72 CKOClock signal output for tuner unit (Z120) 6ST/AV./6CH-Not used, open 7NC-Not used, open 8 9SEL TUNER-Not used, open 10SEL/ TUNER-Not used, connected to GND 11AC INIPower failure detect signal input 12RESETIReset signal input 13X INIOscillator connec

38、ted terminal (32.7 kHz) 14X OUTO 15VSS-GND terminal 16XC INIOscillator connected terminal (6 MHz) 17XC OUTO 18VDD1IPower supply terminal 19KEY TUIOperation key signal input 20KEY KARAOKEIOperation key signal input 21SH REQIRequest signal input from Sound Processor 22NC(GND)-Not used, connected to GN

39、D 23VR JOGBIVolume control signal input 24VR JOGA 25MIC DETIMicrophone connecting detect signal input (Not used, connected to VDD) 26HP SWIHeadphone connecting detect signal input 27RDS CLKIRDS clock signal input 28RDS DATAIRDS data signal input 29REMO/CONIRemote control signal input 30 | 37 8G | 1G

40、 OGrid signal output 38 | 45 P1 | P8 OSegment signal output 46VDD3IPower supply terminal 47 | 50 P9 | P12 OSegment signal output 51-VPIPower supply terminal (Negative) 52 | 71 P13 | P32 OSegment signal output 72VDD4IPower supply terminal 73 | 78 P33 | P38 OSegment signal output 79REGIN0-Not used, co

41、nnected to GND 80REGIN1 81STANDBYOLED (STANDBY) drive signal output 82TIMEROLED (TIMER) drive signal output 83S.W.LEDOLED (DIGITAL S.WOOFER) drive signal output 84LOUNGE-LED (LOUNGE) drive signal output (Not used, connected to GND) 85CHORUS-LED (CHORUS) drive signal output (Not used, connected to VD

42、D) 86MUTEOMuting signal output 87NC-Not used, open 88POWEROPower control signal output 89VSS2-GND terminal 90VDD2IPower supply terminal 91MUTE2OMuting signal output 92NC-Not used, open 93MUTE3OMuting signal output 94SH CSOChip select signal output for Sound Processor 95SH DOOSerial communication sig

43、nal to Sound Processor (Data signal output) 96SH DIISerial communication signal to Sound Processor (Data signal input) 97SH CKISerial communication signal to Sound Processor (Clock signal input) 98E DETIUnusual condition detect signal input 99CR TIMER-Not used, open 100SDIStation detector signal inp

44、ut from tuner unit (Z120) TOP PREVIOUS NEXT 16 Replacement Parts List TOP PREVIOUS NEXT Notes: G Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound

45、(capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufactures specified parts shown in the parts list. G The marks in Remarks indicate language of instruction manual. : Spanish : English : German, Italian, French : Netherlands, Danish, Swedish

46、 : Russian, Polish, Czech G The parenthesized indications in the Remarks columns specify the areas. (Refer to the cover page for area.) G The marking RTL indicates that Retention Time is Limited for this item. After the discontinuation of this assembly in production, the item will continue to be ava

47、ilable for a specific period of time. The retention period of availability is dependenton the type of assembly, and in accordance with the laws governing part and product retention. After the end of this period, the assembly will no longer be available. G All parts are supplied by MESA. Ref. No.Part No.Part Name Headphone jack (PHONES) Tuning buttons ( X, W TUNING) RDS display mode button (RDS, PSDISP MODEPTY) A Except for United Kingdom Remote