Hitachi-HMDR50-mc-sm 维修电路原理图.pdf

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1、SM0101AXF300ESPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTSeptember 2000September 2000September 2000September 2000September 2000 MINI COMPONENT HI-FI SYSTEMMINI COMPONENT HI-FI SYSTEMMINI COMPONENT HI-FI SYSTEMMINI COMPONENT HI-FI SYSTEMMINI COMPONENT HI-FI SYSTEMHITHITHITHITHITA A

2、A A ACHI CONSUMER PRCHI CONSUMER PRCHI CONSUMER PRCHI CONSUMER PRCHI CONSUMER PRODUCTS (S)ODUCTS (S)ODUCTS (S)ODUCTS (S)ODUCTS (S)CONTENTSCONTENTSCONTENTSCONTENTSCONTENTSSPECIFICATIONS .3SERVICE POINTS .4ADJUSTMENTS .10WIRING DIAGRAMS.11PRINTED WIRING BOARDS .14BLOCK DIAGRAM .25CIRCUIT DIAGRAM .29EX

3、PLODED VIEW.53REPLACEMENT PARTS LIST .56CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONDANGERDANGERDANGERDANGERDANGERInvisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE T

4、O BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSUR

5、E TO BEAM.GEFAHRGEFAHRGEFAHRGEFAHRGEFAHRUnsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig

6、 oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig oder abgeschaltet.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UN

7、BEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.DANGERDANGERDANGERDANGERDANGERFaire trs attention aux radiations mises par le faisceau laser invisible au dfaillanc

8、e du verrouillage.Faire trs attention aux radiations mises par le faisceau laser invisible au dfaillance du verrouillage.Faire trs attention aux radiations mises par le faisceau laser invisible au dfaillance du verrouillage.Faire trs attention aux radiations mises par le faisceau laser invisible au

9、dfaillance du verrouillage.Faire trs attention aux radiations mises par le faisceau laser invisible au dfaillance du verrouillage.NE JAMAIS SEXPOSER DIRECTEMENT AU FAISCEAU.NE JAMAIS SEXPOSER DIRECTEMENT AU FAISCEAU.NE JAMAIS SEXPOSER DIRECTEMENT AU FAISCEAU.NE JAMAIS SEXPOSER DIRECTEMENT AU FAISCEA

10、U.NE JAMAIS SEXPOSER DIRECTEMENT AU FAISCEAU.VARNINGVARNINGVARNINGVARNINGVARNINGNr apparaten ppnats och skyddsanordningen felar eller satts ur funktion frekommer osynlig laserstrlning.Nr apparaten ppnats och skyddsanordningen felar eller satts ur funktion frekommer osynlig laserstrlning.Nr apparaten

11、 ppnats och skyddsanordningen felar eller satts ur funktion frekommer osynlig laserstrlning.Nr apparaten ppnats och skyddsanordningen felar eller satts ur funktion frekommer osynlig laserstrlning.Nr apparaten ppnats och skyddsanordningen felar eller satts ur funktion frekommer osynlig laserstrlning.

12、UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.ADVARSELADVARSELADVARSELADVARSELADVARSELr apparatet bnes og beskyttelsesanordningen ikke virker eller sttes un af funktion, forekommer der usynlig laserstrling.r apparatet bne

13、s og beskyttelsesanordningen ikke virker eller sttes un af funktion, forekommer der usynlig laserstrling.r apparatet bnes og beskyttelsesanordningen ikke virker eller sttes un af funktion, forekommer der usynlig laserstrling.r apparatet bnes og beskyttelsesanordningen ikke virker eller sttes un af f

14、unktion, forekommer der usynlig laserstrling.r apparatet bnes og beskyttelsesanordningen ikke virker eller sttes un af funktion, forekommer der usynlig laserstrling.UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.ADVARSELADVARSELADVA

15、RSELADVARSELADVARSELNr denne delen er apen som flge av at lsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstrling.Nr denne delen er apen som flge av at lsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstrling.Nr denne delen er apen som flge av at lsen er utkoplet e

16、ller ikke fungerer, eksisterer det usynlig laserstrling.Nr denne delen er apen som flge av at lsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstrling.Nr denne delen er apen som flge av at lsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstrling.UNNG BLI UTSATT FOR

17、DIREKTE BESTRLING!UNNG BLI UTSATT FOR DIREKTE BESTRLING!UNNG BLI UTSATT FOR DIREKTE BESTRLING!UNNG BLI UTSATT FOR DIREKTE BESTRLING!UNNG BLI UTSATT FOR DIREKTE BESTRLING!VARIOITSVARIOITSVARIOITSVARIOITSVARIOITSLaite lhett nkymtnt lasersteily, kun se avataan ja kun sisiset turvalukot eivt toimi.Laite

18、 lhett nkymtnt lasersteily, kun se avataan ja kun sisiset turvalukot eivt toimi.Laite lhett nkymtnt lasersteily, kun se avataan ja kun sisiset turvalukot eivt toimi.Laite lhett nkymtnt lasersteily, kun se avataan ja kun sisiset turvalukot eivt toimi.Laite lhett nkymtnt lasersteily, kun se avataan ja

19、 kun sisiset turvalukot eivt toimi.VARO JOUTUMASTA ALTTIIKSI STEILYLLE.VARO JOUTUMASTA ALTTIIKSI STEILYLLE.VARO JOUTUMASTA ALTTIIKSI STEILYLLE.VARO JOUTUMASTA ALTTIIKSI STEILYLLE.VARO JOUTUMASTA ALTTIIKSI STEILYLLE.MD MECHANISM MDM-99XCD MECHANISM CDV300DWAXF300EBSAXF300UCAXF300WAXF300WUNHMDR50Radio

20、Fans.CN 收音机爱 好者资料库 2 AX-F300Check that exposed parts are acceptably insulated fromthe supply circuit before returning the repaired instrumentto the customer. Checking methodChecking methodChecking methodChecking methodChecking methodMeasure the resistance value between the both poles ofattachment cu

21、p (Power supply plug) and the exposedparts (Parts such as Knob, Cover, etc. where the cus-tomer is easy to touch.) and check that the resistancevalue is 500 kohms or more.INSTRUMENT(Exposed part)Insulation tester (DC 500V)SAFETY PRECAUTIONSSAFETY PRECAUTIONSSAFETY PRECAUTIONSSAFETY PRECAUTIONSSAFETY

22、 PRECAUTIONSThe following precautions should be observed when servicing.1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachis replacementparts. Especially critical parts in the power circuit block should not be replaced with other makers. Critical p

23、artsare marked with in the circuit diagram and printed wiring board.2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertainthat it is completely safe to operate without danger of electrical shock.RadioFans.CN 收音机爱 好者资料库 3 AX-F300? ? ? ?R

24、eception frequency band:? (FM:87.5108.0MHz(100kHz step) AM:5201710kHz(10kHz step)? (FM:87.50108.00MHz(50kHz step) MW:5221611kHz(9kHz step) LW:153281kHz(1kHz step)? (FM:87.50108.00MHz(50kHz step) AM:5221611kHz(9kHz step) 5201710kHz(10kHz step)? (FM:76.00108.00MHz(50kHz step) AM:5221629kHz(9kHz step)

25、5201710kHz(10kHz step)Rated output power:40 W + 40 W (6W/ohms, 1kHz, T.H.D. 10%)Audio input / output jacks:CD input jacks, TAPE input/output jacks, AUX input jacks, MD input/output jacks,PRE OUT (MONO) jack, headphones jackPower supply:E,EBS: AC 230 V, 50 HzUC: AC 120 V, 60 HzW,WUN : AC 110127 V, 50

26、/60 Hz AC 220240 V, 50/60 HzPower consumption:74 W (ECO-ON mode : 0.8 W)Maximum external dimensions: 210 (W) 96.5 (H) 350 (D) mm (including feet, controls and terminals)Weight:4.5 kg? ? ? ?Sampling frequency:44.1kHzOptical source:SemiconductorPower supply:E,EBS: AC 230 V, 50 HzUC: AC 120 V, 60 HzW,W

27、UN : AC 110127 V, 50/60 Hz AC 220240 V, 50/60 HzPower consumption:12 WMaximum external dimensions: 210 (W) 96.5 (H) 340 (D) mm (including feet, controls and terminals)Weight:3.2 kg? ? ?System:2 way BASS Reflex Speaker SystemWoofer:10 cm 1Tweeter:5 cm 1Impedance:6 ohmsMaximum external dimensions: 150

28、 (W) 275 (H) 227 (D) mmWeight:3.0 kg (1 speaker)? ?System:Digital Quartz ClockDisplay Format:12-hour cycle (UC DEST) 24-hour cycle (other DEST)Timer Accuracy:Within 60 seconds at monthly rate? ?Remote control system:Infrared pulsePower supply:Two DC 1.5V R6P/AA batteriesMaximum external dimensions:

29、54 (W) 27 (H) 172.5 (D) mmWeight:145g (including batteries)? ? ? ? ?Type:MiniDisc digital audio systemWow & flutter:Below measurable limits (0.001% W. peak or less)Sampling frequency:44.1 kHzRecording method:Magnetic modulation overwritingLight source:Semiconductor LaserPower supply:E,EBS: AC 230 V,

30、 50 HzUC: AC 120 V, 60 HzW,WUN : AC 110127 V, 50/60 Hz AC 220240 V, 50/60 HzPower consumption:14 WMaximum external dimensions: 210 (width) 96.5 (height) 320 (depth) mm (including feet, controls and terminals)Weight:2.6 kgSpecifications are subject to change or performance improvement without notice.

31、 4 AX-F300? ? ? ? ? ? ?(1) Remove 2 screws from both sides.(2) Remove 5 screws from the rear plate.? ? ?(1) Remove 4 screws from the bottom side of the front panel.(2) Remove 2 screws from both sides.(3) Remove screw to remove the ground wire. (E DEST ONLY).(4) Remove the connectors , , and .(5) Rem

32、ove the Front Panel by releasing the pawl on both sides.?!?!?#?$?%? 5 AX-F300&? ?(1) Remove 9 screws from the rear panel.(2) Remove the connector .? ? ?(?)?*(1) Remove 2 screws and then the tone P . W. board.(2) Remove the volume knob assy, remove the nut and remove the volume P. W. board.(3) Remove

33、 9 screws .+? ?,?(?)?*(1) Lift up the TU P . W. board and remove it from the main P. W. board.(2) Remove 2 screws from the top side of the main P. W. board.(3) Remove 4 screws from the bottom side of the chassis.(4) Remove the 4 P . W. board holders from the chassis via the bottom side of the chassi

34、s.?(?-?*? ?. 6 AX-F300? ? ?/? ? ? ?(1) Remove 2 screws from both sides.(2) Remove 3 screws from the rear panel.? ? ?(1) Remove 2 screws from both sides.(2) Remove 3 screws from the bottom side of the front panel.(3) Remove the Front Panel by releasing the pawl on both sides.(4) Remove the flat cable

35、 from the main P . W. board.&? ?(1) Remove 7 screws from the rear panel.?!?!? 7 AX-F300? ?01?,0?, ?22?-?34?,?(?)?*?*? ?(?)?*(1) Remove one each of screws and from the main P. W. board on the side.(2) Remove 2 screws from the top side of the mechanical unit.(3) Remove 2 screws from the bottom side of

36、 the chassis.(4) Remove the connectors , , and of the main P . W. board.(5) Remove the connector of the P . T. P . W. board.(6) Remove 1 screw from the top side of the P . T. cover and detach the power transformer from the chassis.(7) Remove 1 screw of the ground wire.(8) Remove the connectors , and

37、 of the motor P. W. board from the main P. W. board.(9) Remove 2 screws from the motor P . W. board.(10)Remove the solder from the four places of the soldering section of the motor.(11)Remove the connectors PG402 and 403 of the motor P . W. board.?/?/?& 8 AX-F300? ? ?#? ?$? ?+? ? ?(1) Remove 2 screw

38、s from both sides.(2) Remove 6 screws from the rear panel.? ? ?(1) Remove 2 screws from both sides.(2) Remove 4 screws from the bottom side of the front panel.(3) Remove the Front Panel by releasing the pawl on both sides.(4) Remove the flat cable from the main P . W. board.&? ?(1) Remove 7 screws f

39、rom the rear panel.?)?!?!? 9 AX-F300? ?01?,0?, ?22?-?3(1) Remove 4 screws .(2) Remove the flat cable from the main P . W. board.+? ?,?(?)?*(1) Lift up the I/O P . W. board and remove if from the main P. W. board.(2) Remove 6 screws .?)?5$?(?)?* 10 AX-F300? ? ? ? ? DC voltmeter Screwdrivers for adjus

40、tments? !#$%Note: Making adjustments without performing the following setting may result in damage of power transistors.(1) Power switch: OFF(2) Volume knob: MIN(3) Function switch: AUX(4) Speaker: Open(5) VR502L/R: Minimum% ? &? ?(1) Connect the DC voltmeter to PG502. (Refer to the connection diagr

41、am.)(2) Turn on the power and adjust VR502L (on the left) and VR502R (on the right) so that the measured value of the voltme-ter can be within the range of 2 0.5 mV.PRE AMP PWBPG502DC VoltmeterDC Voltmeter+VR502RVR502L 11 AX-F300? ?W004(ORG)W006(BRN)W007(BRK)W002(GRY)W010(YEL)P2BPG001P3ACN504SPEAKER

42、 PWBVOLTAGE SELECTOR P.W.B(W/WUN ONLY)*10A*P9A*P8BCN505*P4A/P6ACN505P2APG003PG002MAIN PWBPG504CN502ACN501ACN101BPG402CN103BCN104BPG301*P4B/ P7A*P5AP3BCN002CN003P10BP9BP8BP5BP6BP7BPT PWBCN104ACN103AW415W001DISP PWBCN101ATU PWBCN502BCN501BPG503CN503 CN401CN402VOLUME PWBPG401TONE PWB(LUG TERMINAL)(LUG

43、TERMINAL)CN301PRE-AMP PWBACCORDW101AP1W003(BLUE)W005(ORG)W009(RED) 12 AX-F300? ?CN404PG103PG102PG101PG401PG901(W/WUN ONLY)PG452PG453PG451MAIN PWB1111111(PINK)PG801CN452CN453CN451CN421PG454(WN/WUN ONLY)(WN/WUN ONLY)PG802MOTOR PWBFL PWB18P BTEM CONN18P BTEM CONN8P BTEM CONN11(BLK)1W10129P FFC CABLEPG4

44、03PG4026P MX CONN8P PH CONN7P PH CONN2P TXL CONN1115P PH CONN5P TXL CONNPG404W401BW402BW403BW401(BRN)W402(YEL)W403(RED)W403AW402AW401ACN401PG001PT PWBVIDEO PWB(W/WUN ONLY)VOL-SEL PWB(W/WUN ONLY)VIDEO MODULE(W/WUN ONLY)AC CORD1(BRN)CN901(WN/WUN ONLY)4P TXL CONN (W/WUN ONLY)1PG4211AP15P MX CONN6P MX C

45、ONN3-DISCCHANGER(SOLDER)(SOLDER)1(BRN)11111 13 AX-F300? ?PG002AC CORDPG001PG301CN301B to BCN501ACN1501CN701BPG101CN401#07328P FFCCABLE#W201RED WHTCN002-1CN002-2CN101PT PWBMAIN PWBMD MECHA UNITI/O PWBCN701AFL PWB 14 AX-F300PRINTED WIRING BOARDS AM-FM TUNER AMPLIFIER (HTA-R100)MAIN PWBComponent Side 1

46、5 AX-F300Soldering Side 16 AX-F300PRE-AMP PWBComponent SideSoldering SidePT PWBComponent SideSoldering Side 17 AX-F300SP PWBComponent SideSoldering SideTONE PWBComponent SideSoldering SideVOL PWBComponent SideSoldering Side 18 AX-F300DISPLAY PWBTU PWBSoldering SideComponent SideSoldering SideCompone

47、nt Side 19 AX-F300CD CHANGER (DA-R100)MAIN PWBSoldering SideComponent SideFL PWBSoldering SideComponent Side 20 AX-F300?Component SideSoldering SideSoldering SideComponent Side 21 AX-F300MINI DISC RECORDER (HMD-R50)MAIN PWBComponent Side 22 AX-F300Soldering Side 23 AX-F300DISPLA Y PWBComponent SideS

48、oldering Sidepg11-24.p6502/08/01, 09:4923 24 AX-F300I/O PWBComponent SideSoldering SidePOWER PWBComponent SideSoldering SideComponent SideSoldering Side 25 AX-F300? ? ? ?(REC IN)TAPEMD(PLAY/IN)MDCDTAPEMDAUXIC301LC78211FUNCTIONIC302BA4558FLINE-AMPIC401BA4558F+12V-12V+5VIC402BA4558FSDBMQ501L/R Q506L/R

49、PRE-VOLTAGE AMPMUTEPROTECTIONQ518DTC323TKAF AMPPRE OUTSPEAKERAP1IC601 HD6433726HMICRO-COMPUTER*1*2*PT002 SUB-TRANSFORMERBASS/TREBLETONE CIRCUITIC403BA6208FMOTOR DRIVERRV404MAIN VOLUMEQ507L/R Q511L/RPOWER AMPHEADFHOMERL001RL002IC603BR9040FEEPROMFLDISPLAYBL1MW RFBLOCKBL1MW/LW RFBLOCKFE101TUNER PACKFM

50、RFAM LOOPAMPFMANTQ1022SK161Q1032SC2058SFM IF AMPQ153 DTA114EKQ151Q152 DIC114TKQ514LW/MW SWITCHIC101LC72131MPLLIC201LA1838AM RF / FM IFMULTIPLEXERIC251LC72720NMRDSDEMODULATORUNIERSAL(WUN)ASIA(W)UK(EBS)EUROPE(E)USA(UC)*1*2*2*1*1IC251IC261BL1Q151-Q154DESTSYMNO.IC261TA2040FAM STEROTODISPLAYIC002KA7812VO