Sharp DV-NC70U Service Manual

1DV-NC70U/CDV-NC72US62K3DV-NC70USERVICE MANUAL CONTENTSIn the interests of user-safety (Required by safety regula-tions in some countries) the set sho

10DV-NC70U/CDV-NC72U6. DISASSEMBLY METHOD6-1. DISASSEMBLY METHOD1)Removing the cabinet.(1) Remove the four screws 1 and one screw 2.2)Removing the fro

11DV-NC70U/CDV-NC72U1316141519181720(6) Remove the two screws e to remove the Power PWBUnit.5)Removing the Cassette Housing Control/VCR Mechanism.(1)

12DV-NC70U/CDV-NC72UParts Code Price Code Name/DescriptionQCNW-8571GEZZ AN Extension cable (wire), 9pin 500mmDVD Main CN3201–Power CN2016-2. EXTENSIO

13DV-NC70U/CDV-NC72U<Replacing the Pickup and the Spindle Motor>Since the Pickup optical axis and turntable inclination of DVD are adjusted with

14DV-NC70U/CDV-NC72U7. OPERATION OF PICKUP7-1. CIRCUIT CONFIGURATION OF PICKUPThe pickup unit reads signals from the disk, and the flexible cable is c

15DV-NC70U/CDV-NC72UVROATSV CD11.JiGHMEC-M005 CK10. JiGDRiVER-6 BM9.JiGDRiVERH-4AP4. Torque Driver JiGTD1200 CB8. ADJUSTMENT, REPLACEMENT AND ASSEMBLY

16DV-NC70U/CDV-NC72U8-2 MAINTENANCE CHECK ITEMS AND EXECUTION TIMEPerform the maintenance with the regular intervals as follows so as to maintain the

17DV-NC70U/CDV-NC72U8-3. FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW)No. FunctionNo. Function1 Full erase head2 Supply pole base ass’y3 Tension arm4

18DV-NC70U/CDV-NC72UFUNCTION OF MAJOR MECHANICAL PARTS (BOTTOM VIEW)No. FunctionNo. Function19 Syncro Gear20 Master cam21 Capstan D.D. motor22 Reel be

19DV-NC70U/CDV-NC72U8-4-2 CARES WHEN REASSEMBLINGINSTALLING THE CASSETTE HOUSINGWhen the cassette housing is installed on the mechanism,the initial s

2DV-NC70U/CDV-NC72U1. IMPORTANT SERVICE NOTESWARNING :TO REDUCE THE RISK OF FIRE OR ELEC-TRIC SHOCK, DO NOT EXPOSE THIS AP-PLIANCE TO RAIN OR MOISTURE

20DV-NC70U/CDV-NC72UINSTALLING THE MECHANISM ON PWBLower vertically the mechanism, paying attention to themechanism edge mode SW position, (Set the mo

21DV-NC70U/CDV-NC72UFigure 8-1.• Reassembly1. Before installing the cassette housing control, short-circuit between TP803 and TP802 provided at main

22DV-NC70U/CDV-NC72U8-7 REEL DISK REPLACEMENT AND HEIGHTCHECK• Removal1. Remove the cassette housing control assembly.2. Remove the Supply/Take-up mai

23DV-NC70U/CDV-NC72UNote:Whenever replacing the reel disk, perform the height check-ing and adjustment.Notes:1. Hold the torque gauge by hand so that

24DV-NC70U/CDV-NC72UNotes:1. Hold the torque gauge by hand so that it is not moved.2. Do not keep the reel disk in lock state. Do not allow long-time

25DV-NC70U/CDV-NC72UFigure 8-12.8-14 CHECKING AND ADJUSTMENT OFTENSION POLE POSITION* Checking can be perform with or withoutcassette housing control.

26DV-NC70U/CDV-NC72U• Checking1. Set a cassette tape, push the REC button to place theunit in the SP record mode. Now check the tension poleposition.2

27DV-NC70U/CDV-NC72U• Adjustment1. If the indication of torque cassette meter is lower thanthe setting, shift the tension spring engagement to thepart

28DV-NC70U/CDV-NC72UFigure 8-23.• Replacement1. Solder the removed PWB to the new head assembly.2. Adjust the height from the A/C head arm (lower surf

29DV-NC70U/CDV-NC72U1. Set the cassette tape in the unit.2. Press the PLAY button to put the unit in the playbackmode.3. Roughly adjust the height of

3DV-NC70U/CDV-NC72U1. NOTES DE SERVICE IMPORTANTESATTENTION: POUR REDUIRE LES RESQUES D'IN-CENDIE OU DE CHOC ELECTRIQUE,NE PAS EXPOSER CET APPARE

30DV-NC70U/CDV-NC72U3 Next, press the tracking button (+), (–) and changethe ATR signal waveform from max to min and frommin to max. At this time adju

31DV-NC70U/CDV-NC72UNotes:When the A/C head X value adjustment is performed, besure to perform at first X value rough adjustment (refer to 8-19, 3-2).

32DV-NC70U/CDV-NC72U8-21 REPLACEMENT OF DRUM D.D. MOTOR1. Set the ejection mode.2. Withdraw the main power plug from the socket.• Removal (Perform in

33DV-NC70U/CDV-NC72U8-23 ASSEMBLING OF PHASE MATCHINGMECHANISM COMPONENTS• Assemble the phase matching mechanism compo-nents in the following order.1.

34DV-NC70U/CDV-NC72UFigure 8-38.8-24 INSTALLING THE SHIFTERFigure 8-37.1. Make sure that the loading arm T and S are at the Phase-Matching point as sh

35DV-NC70U/CDV-NC72U8-25 INSTALLING THE MASTER CAM (ATREAR SIDE OF MECHANISM CHASSIS)1. Make sure beforehand that the shifter is at initial posi-tion.

36DV-NC70U/CDV-NC72U8-27 ASSEMBLY OF CASSETTE HOUSING1. Proof lever, Proof lever spring and Holder RFigure 8-42.MSPRD0215AJFJ*Proof lever spring fixin

37DV-NC70U/CDV-NC72ULANGF9661AJFWTop surface should be free from scratches or soil. When assemble drive lever to frame R, make sure the hole synchro

38DV-NC70U/CDV-NC72U10000000~~~~~~~~The preparation date display of the program10000001 00005502Model number display10000002~~~~~~~~The version displa

39DV-NC70U/CDV-NC72USTEP TESTFOCUS ONASMAX ~~~~ENVPP ~~~~ FEPP ~~~~"Playback" Key input"Playback" Key input"Playback" Ke

4DV-NC70U/CDV-NC72U2. FEATURESËËËËË Common Features• A DVD, CD player and VCR all in one.• Simultaneous VCR recording and DVD playback.ËËËËË VCR•

40DV-NC70U/CDV-NC72UFrom (2)SPIN OFFSET ADJUST"DVD Menu" Key inputThe tray opens.SPIN OFFSET ADJUSTADJUST COMPLETESPIN ~~~~Spin offset adju

41DV-NC70U/CDV-NC72U10. TROUBLESHOOTING(VCR)FLOW CHART NO.1NOYESNOYESNOYESNOYESNOAre PC 40V, AT 27V, PC 13V, STBY 5V lines normal?Is the fuse good?Is

42DV-NC70U/CDV-NC72UFLOW CHART NO.7Does the key switch make good contact, when the cassette tape is inserted?Check switch contact.Is there the functio

43DV-NC70U/CDV-NC72UFLOW CHART NO.13Is the voltage more than about 2.6V DC given out of pin(29) of IC701?Check IC701.Is the supply voltage of 5V fed u

44DV-NC70U/CDV-NC72U FLOW CHART NO.182Only REC mode inoperativeYESNONOYESYESYESNOYESNONOYES YESYESNONOYESNONOYESYESNOAre REC and/or PB mode inoperativ

45DV-NC70U/CDV-NC72UFLOW CHART NO.20NOYESYESNOYESYESNOYESYESYESNONOYESYESNOYESNOYESNOYESYESNONONOIs luminance signal (approx. 0.5 Vp-p) inputted to th

46DV-NC70U/CDV-NC72UFLOW CHART NO.21NO NOYESYESYESNONOYESYESNONONOYES YESYESYESNONONOYESNOYESNOYES YESNOYESNOYESIs FM signal (approx. 0.4 Vp-p) inputt

47DV-NC70U/CDV-NC72UFLOW CHART NO.22NOCheck the peripheral circuit of front input terminal.L-chR-chFront input terminalRear input terminalYESNOYESYESN

48DV-NC70U/CDV-NC72U(DVD)FLOW CHART NO.1Is the supply voltage of 5V fed up to pin(37) of IC8051?Check the STBY 5V line.Is the supply voltage of 3.4V,

49DV-NC70U/CDV-NC72UFLOW CHART NO.6Is the focus control signal outputted to the pin(115) of IC3701?Check the pin(118) of IC3701 DAC power source perip

5DV-NC70U/CDV-NC72U3-1. ACCESSORIESAccessories: Remote control unit × 1, "AA" size battery (R-6, UM/SUM-3) × 2,VIDEO/AUDIO cable × 1, Round

50DV-NC70U/CDV-NC72UIs the E-E signal applied to the pin(4) of IC2003?NoNoNoNoNoNoNoCheck the DVD-H line.NoYesYesYesAre the video signals shown above

51DV-NC70U/CDV-NC72U- M E M O -

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U52~5311. BLOCK DIAGRAMS 11-1. MAIN BLOCK DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U54~5511-2. VCR SIGNAL FLOW BLOCK DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U56~5711-3. VCR SERVO BLOCK DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U58~5911-4. POWER BLOCK DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U60~6112. SCHEMATIC DIAGRAMS 12-1. DVD MAIN (1) CIRCUIT SCHEMAT

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U62~6312-2. DVD MAIN (2) CIRCUIT SCHEMATIC DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U64~6512-3. VCR MAIN (1) CIRCUIT SCHEMATIC DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U66~67å12-4. VCR MAIN (2) CIRCUIT SCHEMATIC DIAGRAMå AND SHADED C

6DV-NC70U/CDV-NC72U4. PART NAMESVCR Main Unit (Front)OPEN/CLOSEPOWEREJECT/STOPREWPLAYRECCHVCR/DVDSELECTORTIMERVCR DVDPLAYSTOPAV 2 INVIDEOL(MONO)-AUD

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U68~6912-5. VCR MAIN (3) CIRCUIT SCHEMATIC DIAGRAM

70DV-NC70U/CDV-NC72UABCDEFGHIJ1234567891012-6. DVD OPERATION CIRCUIT SCHEMATIC DIAGRAM

71DV-NC70U/CDV-NC72U10 11 12 13 14 15 16 17 18 19ABCDEFGHIJ1234567891012-7. VCR OPERATION CIRCUIT SCHEMATIC DIAGRAM

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U72~7312-8. POWER CIRCUIT SCHEMATIC DIAGRAMå AND SHADED COMPONENT

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U74~7513. PRINTED WIRING BOARD ASSEMBLIESDVD MAIN PWB SIDE AR3

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U76~77FDC4FB3601FB3528RJ3102FB3527FB3602C3642C3641C3640C3639C3638

78DV-NC70U/CDV-NC72UABCDEFGHIJ12345678910DVD OPERATION PWB SIDE A SymbolSIDE B

79DV-NC70U/CDV-NC72U10 11 12 13 14 15 16 17 18 19VCR OPERATION PWB SIDE A SymbolABCDEFGHIJ12345678910 SIDE B

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U80~81POWER PWB SIDE A Symbol

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U82~83POWER PWB SIDE B

7DV-NC70U/CDV-NC72UMain Unit (Rear)VCR IN FROMANTENNA UHF/VHFCATVOUT TO TVAV 1 INAUDIORL(MONO)VIDEOAUDIORLVIDEODVD/VCROUTDVD OUTDIGITALAUDIOAUDIORLS-V

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U84~85VCR MAIN PWB SIDE A Symbol

1234567891011 12 13 14 15 16 17 18 19 20ABCDEFGHIJDV-NV70U/CDV-NC72UDV-NC70U/CDV-NC72U86~87VCR MAIN PWB SIDE B

88DV-NC70U/CDV-NC72UABCDEFGHIJ12345678910- M E M O -

89DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodePRINTED WIRING BOARD ASSEMBLIES(NOT REPLACEMENT ITEM)DUNT

90DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeC3723 VCKYCY1HB102K 1000p 50V Ceramic AAC3724 VCKYCY1HB102

91DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeR3623 VRS-CY1JF820J 82 1/16W Metal Oxide AAR3624 VRS-CY1J

92DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeBALUNESFB3301 RBLN-0077TAZZ Balun, BLN-0077TA ABFB3302 RBL

93DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeC304 VCKYCY1HB562KS 5600p 50V Ceramic AAC305 VCKYCY1HB562

94DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeC681 VCKYCY1HF103ZS 0.01 50V Ceramic AAC682 VCKYCY1CF104ZS

95DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeR504 VRS-CY1JF000JS 0 1/16W Metal Oxide AAR601 VRS-CY1JF8

8DV-NC70U/CDV-NC72UREV FWDPLAYSTOP100OPEN/CLOSEVCR/DVDSELECTORVCR MENUDVD SETUPTAPESPEEDONSCREENTITLEDVD MENUDISPLAYFUNCTIONCONTROLPROGRAM ANGLECANCEL

96DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeSWITCHESS701 QSW-F0042AJZZ Switch, REC Tip SW AGS702 QSW-F

97DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeC8057 VCKYCY1HB102KY 1000p 50V Ceramic AAC8058 VCKYCY1HB1

98DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeC928 VCQYTA1HM104K+ 0.1 50V Mylar ACC929 VCEA0A2AW106M+ 10

99DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code205 LX-RZ3015GEFJ CS Washer, x2 AB208 XRESJ30-06000 E-Rin

100DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeCABINET PARTS2 CCABAA036TEV1Top Cabinet Ass'y(NC70U)

101DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeMECHANISM EXPLODED VIEW (DVD PART)ABCDEFGH12345643443243

102DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeMECHANISM EXPLODED VIEW (VCR PART)ABCDEFGH123456AA6666532

103DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeCASSETTE HOUSING CONTROL EXPLODED VIEWABCDEFGH123456AA30

104DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeCABINET EXPLODED VIEWABCDEFGH123456QPOHGIJAGRFNMJSEFIHRDE

105DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description CodeABCDEFGH123456FRONT PANEL EXPLODED VIEW600-13600-6600-14

9DV-NC70U/CDV-NC72U5. MAINTENANCE CHECK ITEMS AND EXECUTION TIMEPartsMaintained1,000 hrs.2,000 hrs.PickupSpindle UnitSled MotorLoading MotorBeltNote :

106DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description Code15. PACKING OF THE SETTGAN-3324AJZZ (DV-NC70U) (Guarantee

107DV-NC70U/CDV-NC72URef. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

108DV-NC70U/CDV-NC72URef. No. Part No. ★ Description CodeRef. No. Part No. ★ Description CodeSHARP CORPORATIONAV Systems GroupQuality & Reliabilit