Hitachi-HCUR700EBS-rec-sm 维修电路原理图.pdf

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1、CAUTION:Before servicing this chassis, it is important that the service technician read the “SafetyPrecautions” and “Product Safety Notices” in this service manual.ATTENTION:Avant deffectuer lentretien du chassis, le technicien doit lire les Prcautions de scuritet les Notices de scurit du produit pr

2、sents dans le prsent manuel.VORSICHT:Vor ffnen des Gehuses hat der Service-Ingenieur die Sicherheitshinweise“ und Hinweisezur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.SERVICE MANUALMANUEL DENTRETIENWARTUNGSHANDBUCHDatacontainedwithinthisServicemanualissubjecttoalterationforimprovement.

3、Les donnes fournies dans le prsentmanuel dentretien peuvent faire lobjetde modifications en vue de perfectionnerle produit.DieindiesemWartungshandbuchenthaltenen Spezifikationen knnen sichzwecks Verbesserungen ndern.OCTOBER 2000MINI COMPONENT HI-FI SYSTEMHCUR700UCHCUR700EHCUR700EBSHCUR700WSM0104SPEC

4、IFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTCONTENTSSPECIFICATIONS.3SERVICE POINTS.4WIRING DIAGRAM.17PRINTED CIRCUIT BOARD.21EXPLODED VIEW.83REPLACEMENT PARTS LIST.87ADJUSTMENTS & MEASUREMENT.11CIRCUIT DIAGRAM.43BLOCK DIAGRAM.79RadioFans.CN 收音机爱 好者资料库HCU-R700 2 SAFETY PRECAUTIONSThe fo

5、llowing 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 partsare marked wit

6、h ! 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.Check that exposed parts are acceptably insulated fromthe

7、 supply circuit before returning the repaired instrumentto the customer. Checking methodMeasure the resistance value between the both poles ofattachment cup (Power supply plug) and the exposedparts (Parts such as Knob, Cover, etc. where the cus-tomer is easy to touch.) and check that the resistancev

8、alue is 500 kohms or more.INSTRUMENT(Exposed part)Insulation tester (DC 500V)RadioFans.CN 收音机爱 好者资料库HCU-R700 3 SPECIFICATIONS AV SURROUND RECEIVER SECTION (HTA-R150)Reception frequency band: UCFM: 87.5 108.0 MHz (100 kHz step)AM: 520 1710 kHz (10 kHz step)E, EBS FM: 87.50 108.00 MHz (50 kHz step)AM:

9、 522 1611 kHz (9 kHz step)WFM: 87.50 MHz - 108.00 MHz (50 kHz step)AM: 522 1611 kHz (9 kHz step)520 kHz - 1710 kHz (10 kHz step)Rated output power: Front: 25W + 25W (6/ohms, 50 Hz - 15 kHz with 0.7% T.H.D.): Center: 25W (6/ohms, 50Hz - 15kHz with 0.7% T.H.D.): Rear: 25W + 25W (6/ohms, 50Hz - 15kHz w

10、ith 0.7% T.H.D.): Front: 30W + 30W (6/ohms, 1 kHz with T.H.D. 10%): Center: 30W (6/ohms, 1 kHz with T.H.D. 10%): Rear: 30W + 30W (6/ohms, 1 kHz with T.H.D. 10%)Audio input / output jacks: Input jacks: DVD, TV/DBS, VCR, MD/TAPE, VIDEO AUXOutput jacks: VCR, MD/TAPEAudio digital input jacks: OPTICAL 1,

11、 OPTICAL 2Video input / output jacks: Input jacks: DVD, TV/DBS, VCR, AUX: Output jacks: VCR, MONITORPower supply: UC: AC 120V 60HzE, EBS : AC 230V 50HzW: AC 110 127V 50/60Hz: AC 220 240V 50/60HzPower consumption: UC: 180W (include AC OUTLET : 60W)E, EBS : 115WW: 115WSTANDBY : 0.8WMaximum external di

12、mensions: 210 (W) x 120 (H) x 324 (D) mm (including feet, controls and terminals)Weight: 5.3 kgTimer: Digital Quartz Clock.Display Format: 24-hour cycle. (E, EBS, W), 12-hour cycle (UC)Timer accuracy: Within 60 seconds at the monthly rate. DVD/CD/VIDEO CD PLAYER SECTION (HDV-R100)Applicable discs: D

13、VD discs: 12cm discs (1 layer and 2 layer)8cm discs (1 layer and 2 layer)Compact discs (CD-DA Video CD): 12cm discs, 8cm discsAudio output jacks: AUDIO OUT (Fixed output level: 2Vrms)Digital output jacks: OPTICALVideo output jacks: VIDEO OUT, S VIDEO OUT, COMPONENT VIDEO OUTVideo output level: VIDEO

14、 OUT: 1Vp-p (75/ohms)S VIDEO: Y; 1Vp-p (75/ohms), C; 0.3Vp-p (75/ohms)COMPONENT: Y; 1Vp-p (75/ohms), CB; 0.7Vp-p (75/ohms)CR; 0.7Vp-p (75/ohms)Audio frequency response: DVD: 2 Hz to 22 kHz (48 kHz sampling), 2 Hz to 44 kHz (96 kHz sampling)CD: 2 Hz to 22 KHz (44.1 kHz sampling)Power supply: UC: AC 1

15、20V 60HzE, EBS : AC 230V 50HzW, WUN: AC 110 127V 50/60Hz: AC 220 240V 50/60HzPower consumption: 14WMaximum external dimensions: 210(W) x 96.5(H) x 309(D) mm (including feet, controls and terminals)Weight: 2.8 kg REMOTE CONTROL SECTIONRemote control unit: RB-HTAR150 (for systems), RB-HDVR100 (for HDV

16、-R100)Remote control system: Infrared pulsePower supply: Two DC 1.5V R6P/AA batteries* Specifications are subject to change for performance improvement without notice.HCU-R700 4 1. Removal of Top Cover(1) Remove 4 screws 1 from each side.(2) Remove 4 screws 2 from the rear plate.S E RV I C E P O I N

17、 T S A V S U R R O U N D R E C E I V E R ( H T A - R 1 5 0 )2. Removal of Front Panel(1) Remove 4 screws 5 from the bottom of the front panel.(2) Remove 2 screws 3 and 2 catches from both side.(3) Remove 2 screws 4.(4) Remove Connector A.(5) Remove 2 screws 6 of P.W.B. bracket to removeConnector B t

18、o H.BCDGHEF54334CatchCatchFig. 2Fig. 4Fig. 36AFig. 1121HCU-R700 5 Fig. 6Fig. 54. Removal of Power Transformer(1) Remove the 4 screws 8.(2) Remove Connector I to K.3. Removal for Rear Panel(1) Remove 20 screws 7.78IJKHCU-R700 6 5. Removal of P.W.B. Board.(1) Remove 1 screw 9 and 1 screw 10.(2) Remove

19、 2 screw 11.(3) Remove 5 screws 12 from the bottom of chassis.(4) Remove 2 pieces of P.W.B. holder a from the bottom chassis.12aFig. 711Fig. 8910Fig. 9HCU-R700 7 6. Removal of Front P.W.B. Board.(1) Pull the Volume knob away, and remove the nut.(2) Pull out 2 Bass/Treble knobs and remove the nuts.(3

20、) Remove the Function knob.(4) Remove 9 screws 13.13Fig. 11NutNutVolume knobBass/Treble knobFunction knobFig. 10HCU-R700 8 1. Removal of Top Cover(1) Remove 2 screws 1 from both side.(2) Remove 4 screws 2 from the rear panel. D V D / C D / V I D E O C D P L A Y E R ( H D V - R 1 0 0 )2. Removal of F

21、ront Panel(1) Remove 4 screws 3 from the bottom of the front panel.(2) Remove 2 screws 4 and 2 catches from both side.(3) Remove Connector A and B.Fig. 23Fig. 344CatchCatchAB112Fig. 1HCU-R700 9 4. Removal of Main P.W.B. Board(1) Remove 4 screws 6.(2) Remove Connector C and D.3. Removal of Rear Panel

22、(1) Remove 6 screws 5.5. Removal of Power Supply Board(1) Remove 4 screws 7.(2) Remove Connector E.Fig. 45Fig. 5Main P.W.B BoardCD6Fig. 67EHCU-R700 10 6. Removal of Deck Mechanism Assy(1) Remove 4 screws 8 to release the mechanism cover.(2) Remove 4 screws 9.7. Removal of Front P.W.B. Board(1) Remov

23、e away the Front Metal.(2) Pull out the Enter Button.(3) Remove 9 screws 10.Fig. 8Fig. 9Fig. 788910Enter ButtonFront MetalHCU-R700 11 I O P M E A S U R E M E N T M E T H O DWhen measuring Laser drive current (Iop), playback the discs (CD, DVD) described below, measure Iop for CD Laser andDVD Laser b

24、y the test point (LD1 - LD4) on the SERVO P.W.B.TEST DISC : DVD / DVDT-S01 (Manufactured by ALMEDIO INC)CD / TCD-784 (Manufactured by ALMEDIO INC) or commercially available Discs.1. DVD Laser current measurement(1)Connect the oscilloscope GND side to test point LD1 near R147 and oscilloscope signal

25、side totest point LD2 near R147.(2)Playback the title 1 / chapter 1 of the DVD Test Disc.(3)Measure the voltage between LD1 and LD2, calculate Iop as follows.2. CD Laser current measurement(1)Connect the oscilloscope GND side to test point LD3 near R148 and oscilloscope signal side totest point LD4

26、near R148.(2)Playback the track 1 of the CD Test Disc.(3)Measure the voltage between LD3 and LD4, calculate Iop as follows.When repairing, carry out failure diagnostics by following the proceduredescribed below.If the present value of the laser drive current is 50% up to initial value, it is the poi

27、ntof the pickup replacement.In case of the pickup replacement, replace the Traverse Unit with no adjustment.The initial value is indicated on the label on back side of Mecha.If the present value exceeds 80mA,replace the Traverse Unit with a new one.Cause : Damaged electrostatically when replaced.Iop

28、 =Measurement Voltage Value39 (Resistance Value)Iop =Measurement Voltage Value39 (Resistance Value)O P T I C A L P I C K U P D I A G N O S T I C S A N D R E P L A C E M E N TLD3LD2LD1R148R147LD4LD2LD1Oscilloscope+ NO DISC indicated, Playback not smooth, etc Laser drive current check HF signal checkP

29、resent value : 50% up to initial valueTraverse Unit replacement (refer to the next page)Laser drive current check after replacement. If the present value is less than 80mA, write on the new label by hand, put on the new label over the old label. Mechanism Unit bottom sideHCU-R700 11 CHECKING THE WAV

30、EFORMSTo check the waveforms on the SERVO P.W.B., the GND () probe of the Osilloscope to “ ref” point.NOTESMEASURING DISC : DVD / DVDT-S01CD / TCD-784A(It is better to use wires for extending between the probe and test points.) When watching the HF waveform, use the extending wire as short as possib

31、le. When HF waveform is noisy or can not discriminate the eye-pattern, replace the Traverse Unit after measuringthe Iop. Test points 1 $ are shown below.) O U T, T M + T M +9TR+ (TP)8TR (TP)5FO (TP)&FM+ (TP)%FM (TP)4FO+ (TP)$FMO (TP) T M M3FOO (TP)7TRO (TP)1RFI (TP)#A3 (TP)!DMO (TP)FG (TP)( I N S W

32、N6TEI (TP)2FEI (TP)VREF (TP)HCU-R700 13 W A V E F O R M SDVD PLAYDVD PLAYDVD PLAY (INNER)(DVD/CD) LOADING PLAYSEARCH TO OUTER CHAPTERPOWER ON(INNER OUTER)(INNER SWITCH ON)LOADER(OPEN CLOSE)CD PLAYCD PLAYCD PLAY (INNER)DVD PLAY1 HF(RFI)DVD PLAY6 TEI7 TRO8 TR+9 TR?DVD PLAY(INNER)10DMO11FG12A3(DVD / PL

33、AY) LOADING PLAY2 FEI3 FOO4 FO+5 FO?SEARCH TO OUTER CHAPTER?(INNER OUTER)6 TEI13FMO14FM?15FM+POWER ON(INNER SWITCH ON)16INSWN13FMO14FM?17OUTLOADER(OPEN CLOSE)TMM18?TM+19?TM?20?CD PLAY1 HF(RFI)CD PLAY6 TEI7 TRO8 TR+9 TR?CD PLAY(INNER)10DMO11FG12A350mV50nSCH1: 500mVCH2 : 100mV1mSCH1 : 100mVCH2 : 5V2mV

34、CH3 : 1VCH4 : 1VCH3 : 10VCH1 : 500mVCH2 : 200mVCH1: 500mVCH2 : 1V100mSCH1 : 5VCH2 : 1V10mSCH3 : 2VCH4 : 2VCH3 : 5VCH4 : 5VCH3 : 1VCH4 : 1V50mV100nSCH1 : 500mVCH2 : 100mV1mSCH1 : 200mVCH2 : 5V2mSCH3 : 1VCH4 : 1VCH3 : 10VCH1 : 500mVCH2 : 2V1SCH3 : 2VHCU-R700 14 T R O U B L E S H O O T I N GNONONo Powe

35、r (Display tube and LED do not light up)Check the Connector as followsPower unit assy :PG001, CN2, CN052, CN101, CN602Main P.W.B. unit : CN3BServo P.W.B. unit : PG4/PG5/PG7/PG8Check the voltage of Power unit assyCN101 : (to Main P.W.B. unit) 10P EH :6+ 5 V1 3 5 7 9G N DPower unit assy defective, rep

36、laceInsert the Connector* DVD Player initialization should be performed whenthe com, peripheral parts of com, and Main P.W.B.unit are replaced.(Please see page 7 of supplement servicemanual (x-0075)Is IC110 pin (3) 5V? (Main P.W.B. unit, RESET signal)IC101 (Main P.W.B. unit) re-solder or replaceNOCh

37、eck the voltage of Power unit assyCN2 : (to Servo P.W.B. unit) 4P LC :1+12V4+5V2 3GNDCN101 : (to Main P.W.B. unit) 10P EH :2+12V4+5VCN602 : (to Key/Disp unit) 3P PH :126V223V329VPower unit assy defective, replaceOKReplace “good” Main P.W.B. unit,playback the ordinary discs (CD and DVD)Main P.W.B. un

38、it defective Check the signal of IC101 pins (49) XIN, (105) CLK,(116) PCLK2X are 27MHzNOIC101 and IC108 (Main P.W.B. unit) re-solder orreplaceMain P.W.B. unit defective Check the signal of IC101 pin (39) MCLK is 94.5kHzNOIC101(Main P.W.B. unit) re-solder or replaceMain P.W.B. unit defective Check th

39、e CLOCK of IIC BUS and DATA IC101 pin(160) AUXO (161) AUX1, when the Power on.NOIC101, IC111 and IC701 (Main P.W.B. unit)re-solder or replaceIC101 (Main P.W.B. unit) re-solder or replaceOKReplace “good” DVD Mechanism, playback the ordinarydiscs (CD and DVD)DVD Mechanism defective Check the voltage o

40、f IC8 pin (30) (Servo P.W.B. unit)RESET is +5VNOIC44 (3 pins), D1, D2, R7 (Servo P.W.B. unit) re-solderCheck the Laser drive current and HF waveform(Present value exceeds the initial value by 1.5 times)NOServo P.W.B. unit replaceThe Traverse unit replaceLaser current registering after replacementNON

41、ODisplay tube does not light up (LED light up)Check the Connector as followsPower unit assy : CN2, CN052, CN101, CN602Main P.W.B. unit : CN3BServo P.W.B. unit : PG4/PG5/PG7/PG8Check the voltage of Power unit assyCN602 : (to Key/Disp unit) 3P PH :126V223V329VPower unit assy defective, replaceInsert t

42、he ConnectorPlease check the marked * with of item 1 No Power*2*1NOCheck the voltage of Power unit assyCN101 : (to Main P.W.B. unit) 10P EH :!+ 5 V1 3 5 7 9G N DCheck the soldering of IC101 and IC108(Main P.W.B. unit)NOIC101 (Main P.W.B. unit) replace, and then IC108 replaceNOHCU-R700 15 A D J U S T

43、 M E N T SAdjusting and Checking the Electrical SectionMeasuring instruments needed for the adjustments(1) Oscilloscope(2) DC voltmeter(3) Adjustment screwdriver(4) Test discTDV-540 Title2 Tr No. 11.Adjustment of + 5V VoltageAdjust R502 so that the voltage of PG101 Pin6 (+5V) should be within Limit

44、of 5.00.05V.2.Adjustment of VIDEO OUT Level (Load: 75).(1) Adjust VR701(3) Adjust VR703Output Cord Connect to VIDEO OUTOutput Cord Connect to CR(2) Adjust VR702(4) Adjust VR704Output Cord Connect to VIDEO OUTOutput Cord Connect to CB*Using Disc TDV-540 Title 2 Tr No. 1Fig. 1 Adjustment of VIDEO OUT

45、Level (Load: 75)Video Output TerminalAdjustment VolSpecification1.Video OutVR7011V 80mVp-p2.Video OutVR702680 40mVp-p3.CBVR703480 20mVp-p4.CRVR704480 20mVp-p1V 80mVp-pVIDEO OUT480 20mVp-pCOMPONENT OUT680 40mVp-pVIDEO OUT480 20mVp-pCOMPONENT OUTHCU-R700 16 M E M OHCU-R700 18 17 W I R I N G D I A G R

46、A M A V S U R R O U N D R E C E I V E R ( H T A - R 1 5 0 )?! ?$#?! ?%#?&(&()&()&*)&+,?&()&-)&.,?&)&/)&)&0)&1)&2)&()&-)&/)&+)&.?34355678?9:;?;ABC?;D?;D?;ABC?EFGH=E?IJ=KDELMNJLMHNEDOADPL9B9NQIHN=F9B9NKDELMNJLMHNE?IABCBDKDELMNJLMHNERSTUVWTXYZTUVTUXTUVWTTUVZTUVX_STUVabaZcSTUVXdZTUVRedZaeTUVaXTUV?&,)&*?

47、&()&1)&0)&2)&WTTSfTUVZceWghiTUVjklmnopnqprstujklmnopnqmkvwrstuS_WXSX_TUVnxjyzqrstu;9|L?9:B?9HCU-R700 20 19 W I R I N G D I A G R A M D V D / C D / V I D E O C D P L A Y E R ( H D V - R 1 0 0 )CN601 CN602 FL PWB W101 W1A W1B SW PWB PG001 W4B W1B PG2PG101 PG602 SUPPLY PWB W1 W4 E, EBS W, WUN ONLY PG60

48、1PG3B CN101MAIN PWB 1 10 1 2 39 40 1 7 1 2 1 4 1 10 1 317 1 3 CN2 CN601CN602 CN101 AP1 AC CORD W102 DVD MECHACN2 PG3A SERVO PWB 4 11 40 PG4 PG5 PG6 PG7 PG8 1115 3 6 1115242 39 HCU-R700 21 PRINTED WIRING BOARD AV SURROUND RECEIVER (HTA-R150)Component SideSoldering SideFL PWBHCU-R700 22 Component Side

49、DSP PWBDIGITAL PWBHCU-R700 23 Soldering SideDSP PWBDIGITAL PWBHCU-R700 24 Component SideSoldering SideE.VOL PWBHCU-R700 25 Component SideSoldering SideVIDEO PWBHCU-R700 26 Component SideFUNCTION PWBTU PWBHCU-R700 27 Soldering SideFUNCTION PWBTU PWBHCU-R700 28 Component SideSUPPLY PWBSP EXT PWBHCU-R7

50、00 29 Soldering SideSUPPLY PWBSP EXT PWBHCU-R700 30 Component SideRECT PWBAC OUTLET (E) PWBAC OUTLET (UC) PWBHCU-R700 31 Soldering SideRECT PWBAC OUTLET (E) PWBAC OUTLET (UC) PWBHCU-R700 32 Component SidePOWER PWBTRANS (1) PWBTRANS (2) PWBHCU-R700 33 Soldering SidePOWER PWBTRANS (1) PWBTRANS (2) PWB