Hitachi-HMDR50-mc-sm维修电路原理图.pdf

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1、SM0101 AXF300E SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT September 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 SYSTEM HITHITHITHITHIT

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

3、IAGRAM .29 EXPLODED VIEW.53 REPLACEMENT PARTS LIST .56 CAUTIONCAUTIONCAUTIONCAUTIONCAUTION DANGERDANGERDANGERDANGERDANGER 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

4、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 EXPOSURE TO BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVO

5、ID DIRECT EXPOSURE TO BEAM. GEFAHRGEFAHRGEFAHRGEFAHRGEFAHR Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung

6、) funktionsuntchtig 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 KONTA

7、KT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN. DANGERDANGERDANGERDANGERDANGER Faire trs attention aux radiations mises par le faisceau laser

8、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 dfaillance du verrouillage.Faire trs attention aux radiations mises par le faisce

9、au laser invisible au 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

10、 DIRECTEMENT AU FAISCEAU.NE JAMAIS SEXPOSER DIRECTEMENT AU FAISCEAU. VARNINGVARNINGVARNINGVARNINGVARNING 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 l

11、aserstrlning.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.Nr apparaten ppnats och skyddsanordningen felar eller satts ur funktion frekomm

12、er osynlig laserstrlning. UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING.UNDVIK DIREKT BESTRLNING. ADVARSELADVARSELADVARSELADVARSELADVARSEL r apparatet bnes og beskyttelsesanordningen ikke virker eller sttes un af funktion, forekommer der usynlig

13、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 funktion, forekommer der usynlig laserstrling.r apparatet bnes og beskyttelsesanordningen ikk

14、e 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. UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.UNDG DIREKTE BESTRLING.UNDG DIREKTE B

15、ESTRLING. ADVARSELADVARSELADVARSELADVARSELADVARSEL 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.Nr denne delen er apen so

16、m 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 eller ikke fungerer, eksisterer det usynlig la

17、serstrling. UNNG BLI UTSATT FOR 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! VARIOITSVARIOITSVARIOITSVARIOITSVARIOITS Laite lhett nkymtnt lasersteily, kun se avataan ja kun s

18、isiset 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 kun sisiset turvalukot eivt toimi.Laite lhett nkym

19、tnt lasersteily, kun se avataan ja 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-99X CD MECHANISM CDV300DW AXF300

20、EBS AXF300UC AXF300W AXF300WUN HMDR50 RadioFans.CN 收音机爱 好者资料库 2 AX-F300 Check that exposed parts are acceptably insulated from the supply circuit before returning the repaired instrument to the customer. Checking methodChecking methodChecking methodChecking methodChecking method Measure the resistan

21、ce value between the both poles of attachment cup (Power supply plug) and the exposed parts (Parts such as Knob, Cover, etc. where the cus- tomer is easy to touch.) and check that the resistance value is 500 kohms or more. INSTRUMENT (Exposed part) Insulation tester (DC 500V) SAFETY PRECAUTIONSSAFET

22、Y PRECAUTIONSSAFETY PRECAUTIONSSAFETY PRECAUTIONSSAFETY PRECAUTIONS The following precautions should be observed when servicing. 1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachis replacement parts. Especially critical parts in the power circuit

23、block should not be replaced with other makers. Critical parts are 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 ascertain that it is completely safe to operate without danger

24、of electrical shock. RadioFans.CN 收音机爱 好者资料库 3 AX-F300 ? ? ? ? ? Reception 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(1

25、0kHz step) ? (FM:76.00108.00MHz(50kHz step) AM:5221629kHz(9kHz step) 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 jack Powe

26、r supply:E,EBS: AC 230 V, 50 Hz UC: AC 120 V, 60 Hz W,WUN : AC 110127 V, 50/60 Hz AC 220240 V, 50/60 Hz Power 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:44.1kHz Opti

27、cal source:Semiconductor Power supply:E,EBS: AC 230 V, 50 Hz UC: AC 120 V, 60 Hz W,WUN : AC 110127 V, 50/60 Hz AC 220240 V, 50/60 Hz Power consumption:12 W Maximum external dimensions: 210 (W) 96.5 (H) 340 (D) mm (including feet, controls and terminals) Weight:3.2 kg ? ? ? System:2 way BASS Reflex S

28、peaker System Woofer:10 cm 1 Tweeter:5 cm 1 Impedance:6 ohms Maximum external dimensions: 150 (W) 275 (H) 227 (D) mm Weight:3.0 kg (1 speaker) ? ? System:Digital Quartz Clock Display Format:12-hour cycle (UC DEST) 24-hour cycle (other DEST) Timer Accuracy:Within 60 seconds at monthly rate ? ? Remote

29、 control system:Infrared pulse Power supply:Two DC 1.5V R6P/AA batteries Maximum external dimensions: 54 (W) 27 (H) 172.5 (D) mm Weight:145g (including batteries) ? ? ? ? ? Type:MiniDisc digital audio system Wow & flutter:Below measurable limits (0.001% W. peak or less) Sampling frequency:44.1 kHz R

30、ecording method:Magnetic modulation overwriting Light source:Semiconductor Laser Power supply:E,EBS: AC 230 V, 50 Hz UC: AC 120 V, 60 Hz W,WUN : AC 110127 V, 50/60 Hz AC 220240 V, 50/60 Hz Power consumption:14 W Maximum external dimensions: 210 (width) 96.5 (height) 320 (depth) mm (including feet, c

31、ontrols and terminals) Weight:2.6 kg Specifications are subject to change or performance improvement without notice. 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

32、 2 screws from both sides. (3) Remove screw to remove the ground wire. (E DEST ONLY). (4) Remove the connectors , , and . (5) Remove 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)

33、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 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.

34、 (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 chassis. ?(?-?* ? ? ?. 6 AX-F300 ? ? ?/? ? ? ? ? (1) Remove 2 screws from both sides. (2) Remove 3 screws from the rear panel. ? ? ? (1) Remove 2 screws from bo

35、th 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 from the main P . W. board. &? ? (1) Remove 7 screws from the rear panel. ?!? ?!? 7 AX-F300 ? ?01?,0?, ?22?-?34?,?(?)?*?*? ?(?)?* (1) Remov

36、e 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 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)

37、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 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 fr

38、om 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 screws from both sides. (2) Remove 6 screws from the rear panel. ? ? ? (1) Remove 2 screws from both sides. (2) Remove 4

39、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 from the rear panel. ? ?)? ?!? ?!? 9 AX-F300 ? ?01?,0?, ?22?-?3 (1) Remove 4 screws . (2) Remove the flat cab

40、le 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$?(?)?* 10 AX-F300 ? ? ? ? ? ? DC voltmeter Screwdrivers for adjustments ? !#$% Note: Making adjustments without performing the following setting may res

41、ult 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 diagram.) (2) Turn on the power and adjust VR502L (on the left) and VR502R (on the

42、right) so that the measured value of the voltme- ter can be within the range of 2 0.5 mV. PRE AMP PWB PG502 DC VoltmeterDC Voltmeter + VR502RVR502L 11 AX-F300 ? ? ? W004(ORG) W006 (BRN) W007 (BRK) W002(GRY) W010(YEL) P2B PG001 P3A CN504 SPEAKER PWB VOLTAGE SELECTOR P.W.B (W/WUN ONLY) *10A *P9A *P8B

43、CN505 *P4A/P6A CN505 P2A PG003PG002 MAIN PWB PG504 CN502ACN501A CN101B PG402 CN103B CN104B PG301 *P4B/ P7A *P5AP3B CN002CN003 P10BP9BP8B P5BP6BP7B PT PWB CN104ACN103A W415 W001 DISP PWB CN101A TU PWB CN502BCN501B PG503 CN503 CN401 CN402 VOLUME PWB PG401 TONE PWB (LUG TERMINAL)(LUG TERMINAL) CN301 PRE-AMP PWB AC CORD W101 AP