Service Manual
Page 1
... 3. OPERATION OF PICKUP ...14 8. BLOCK DIAGRAMS ...52 12. SCHEMATIC DIAGRAMS ...60 13. IMPORTANT SERVICE NOTES ...2 2. PART NAMES ...6 5. CONTENTS Page 1. REPLACEMENT PARTS LIST ...89 15. The contents are subject to change without notice. PRINTED WIRING BOARD ASSEMBLIES 74 14. TEST MODE ...38 10. TROUBLESHOOTING ...41 11. MAINTENANCE CHECK ITEMS AND EXECUTION TIME 9 6. POWER EJECT/STOP / REW PLAY AV 2 IN VIDEO L(MONO)-AUDIO-R REC CH DV-NC70U/C DV-NC72U SERVICE MANUAL S62K3DV-NC70U VCR/DVD COMBINATION MODEL DV-NC70U VCR/DVD SELECTOR TIMER VCR DVD PLAY STOP OPEN...
... 3. OPERATION OF PICKUP ...14 8. BLOCK DIAGRAMS ...52 12. SCHEMATIC DIAGRAMS ...60 13. IMPORTANT SERVICE NOTES ...2 2. PART NAMES ...6 5. CONTENTS Page 1. REPLACEMENT PARTS LIST ...89 15. The contents are subject to change without notice. PRINTED WIRING BOARD ASSEMBLIES 74 14. TEST MODE ...38 10. TROUBLESHOOTING ...41 11. MAINTENANCE CHECK ITEMS AND EXECUTION TIME 9 6. POWER EJECT/STOP / REW PLAY AV 2 IN VIDEO L(MONO)-AUDIO-R REC CH DV-NC70U/C DV-NC72U SERVICE MANUAL S62K3DV-NC70U VCR/DVD COMBINATION MODEL DV-NC70U VCR/DVD SELECTOR TIMER VCR DVD PLAY STOP OPEN...
Service Manual
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... must be corrected before returning the VCR/DVD combination model to make certain that leads are important operating and maintenance instructions in series with all protective devices such as a water pipe or conduit. Reverse the AC plug on the set and repeat AC voltage measurements for current in the VCR/DVD combination model. 2. DV-NC70U/C DV-NC72U 1. q Using two clip leads, connect a 1.5k ohm, 10 watt resistor...
... must be corrected before returning the VCR/DVD combination model to make certain that leads are important operating and maintenance instructions in series with all protective devices such as a water pipe or conduit. Reverse the AC plug on the set and repeat AC voltage measurements for current in the VCR/DVD combination model. 2. DV-NC70U/C DV-NC72U 1. q Using two clip leads, connect a 1.5k ohm, 10 watt resistor...
Service Manual
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... to Fast Forward and Rewind. • EZ Set Up (Auto Channel/Clock Set Up) • S-VHS Quasi Playback • 19µ Clear Picture System (in EP mode) • Simple Recording Timer • Sharp Super Picture • Exact Rec/Tape Remaining Ë DVD • Plays DVD, CD (Digital Audio) discs as well as CD-R/CD-RW discs recorded in MP3 file format • 3D Virtual Surround provides high-quality surround sound • Digital Gamma correction and Digital Super Picture functions • Dolby Digital*1/DTS*2 digital out...
... to Fast Forward and Rewind. • EZ Set Up (Auto Channel/Clock Set Up) • S-VHS Quasi Playback • 19µ Clear Picture System (in EP mode) • Simple Recording Timer • Sharp Super Picture • Exact Rec/Tape Remaining Ë DVD • Plays DVD, CD (Digital Audio) discs as well as CD-R/CD-RW discs recorded in MP3 file format • 3D Virtual Surround provides high-quality surround sound • Digital Gamma correction and Digital Super Picture functions • Dolby Digital*1/DTS*2 digital out...
Service Manual
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... Input Video Input Video Output Audio Output (0 dB = 0.775 Vrms) Audio Output (0 dB = 0.775 Vrms) Hi-Fi Audio Memory Backup VHF 2-13 UHF 14-69 CATV 1-125 75Ω Input level: 0.5 to 2.0 Vp-p (75Ω) Output level: 1.0 Vp-p (75Ω) Input level: -8 dBs (47kΩ) Output level: -8 dBs (1kΩ) Dynamic Range: 90 dB Frequency Response: 20 Hz-20 kHz 60 seconds DVD DVD/VCR shared Video output Component color output S video output Audio output Video signal horizontal resolution S/N ratio Audio signal...
... Input Video Input Video Output Audio Output (0 dB = 0.775 Vrms) Audio Output (0 dB = 0.775 Vrms) Hi-Fi Audio Memory Backup VHF 2-13 UHF 14-69 CATV 1-125 75Ω Input level: 0.5 to 2.0 Vp-p (75Ω) Output level: 1.0 Vp-p (75Ω) Input level: -8 dBs (47kΩ) Output level: -8 dBs (1kΩ) Dynamic Range: 90 dB Frequency Response: 20 Hz-20 kHz 60 seconds DVD DVD/VCR shared Video output Component color output S video output Audio output Video signal horizontal resolution S/N ratio Audio signal...
Service Manual
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... REPEAT indicator ANGLE indicator DV-NC70U/C DV-NC72U 4. PART NAMES 6 VCR Main Unit (Front) POWER EJECT/STOP Cassette compartment VCR/DVD SELECTOR TIMER indicator Front AUDIO/ VIDEO input jack POWER EJECT/STOP / REW PLAY AV 2 IN VIDEO L(MONO)-AUDIO-R REC CH REW PLAY REC CH VCR/DVD SELECTOR TIMER VCR DVD VCR Front Panel Display Operation status Indicator VCR Mode Indicator Timer Recording Indicator Audio Output Indicator Tape Speeds Indicator VCR LR SEP Clock Indicator Channel Indicator Tape Counter Indicator PLAY STOP OPEN/CLOSE DVD Main Unit (Front) POWER Disc tray OPEN...
... REPEAT indicator ANGLE indicator DV-NC70U/C DV-NC72U 4. PART NAMES 6 VCR Main Unit (Front) POWER EJECT/STOP Cassette compartment VCR/DVD SELECTOR TIMER indicator Front AUDIO/ VIDEO input jack POWER EJECT/STOP / REW PLAY AV 2 IN VIDEO L(MONO)-AUDIO-R REC CH REW PLAY REC CH VCR/DVD SELECTOR TIMER VCR DVD VCR Front Panel Display Operation status Indicator VCR Mode Indicator Timer Recording Indicator Audio Output Indicator Tape Speeds Indicator VCR LR SEP Clock Indicator Channel Indicator Tape Counter Indicator PLAY STOP OPEN/CLOSE DVD Main Unit (Front) POWER Disc tray OPEN...
Service Manual
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... ON SCREEN DISPLAY FUNCTION CONTROL TITLE RETURN Number buttons REV STOP POWER TIMER ON/OFF TV/VCR EJECT ON VCR/DVD VCR MENU DISPLAY SCREEN SELECTOR DVD SETUP FUNCTION CONTROL PROGRAM ANGLE OPEN/ CLOSE TITLE DVD MENU CANCEL RETURN SET ENTER ZERO BACK SKIP SEARCH REPLAY AM/PM 100 REV REC TAPE SPEED CH INPUT VCR DVD FWD PLAY STOP PAUSE/STILL DPSS SKIP SLOW AUDIO OUTPUT VCR DVD VCR/DVD COMBINATION REPEAT, PROGRAM VCR/DVD SELECTOR ANGLE DVD SETUP OPEN/CLOSE DVD MENU ENTER CURSOR ( / / / ) PLAY FWD PAUSE/STILL SLOW SKIP VCR/DVD CHANGE Switch Do not subject the remote...
... ON SCREEN DISPLAY FUNCTION CONTROL TITLE RETURN Number buttons REV STOP POWER TIMER ON/OFF TV/VCR EJECT ON VCR/DVD VCR MENU DISPLAY SCREEN SELECTOR DVD SETUP FUNCTION CONTROL PROGRAM ANGLE OPEN/ CLOSE TITLE DVD MENU CANCEL RETURN SET ENTER ZERO BACK SKIP SEARCH REPLAY AM/PM 100 REV REC TAPE SPEED CH INPUT VCR DVD FWD PLAY STOP PAUSE/STILL DPSS SKIP SLOW AUDIO OUTPUT VCR DVD VCR/DVD COMBINATION REPEAT, PROGRAM VCR/DVD SELECTOR ANGLE DVD SETUP OPEN/CLOSE DVD MENU ENTER CURSOR ( / / / ) PLAY FWD PAUSE/STILL SLOW SKIP VCR/DVD CHANGE Switch Do not subject the remote...
Service Manual
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... operating condition. Carefully remove the dust and dirt from the objective lens. The laser light having wavelength 650 nm is turned on and off. 4. Parts Pickup Spindle Unit Sled Motor Loading Motor Belt Maintained 1,000 hrs. 2,000 hrs. Note : Part Replacement : Cleaning (For cleaning, use a lint-free cloth danpened with the lens blower. MAINTENANCE CHECK ITEMS AND EXECUTION TIME DV-NC70U/C DV-NC72U MECHANICAL PARTS...
... operating condition. Carefully remove the dust and dirt from the objective lens. The laser light having wavelength 650 nm is turned on and off. 4. Parts Pickup Spindle Unit Sled Motor Loading Motor Belt Maintained 1,000 hrs. 2,000 hrs. Note : Part Replacement : Cleaning (For cleaning, use a lint-free cloth danpened with the lens blower. MAINTENANCE CHECK ITEMS AND EXECUTION TIME DV-NC70U/C DV-NC72U MECHANICAL PARTS...
Service Manual
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..., and a tray is not played back. Front Side 1. Remove the Pickup FFC from the Pickup Interface PWB. 8. After setting the mechanism chassis to prevent the electrostatic discharge damage of the base chassis. 3. Remove the mechanism with higher accuracy, make a replacement as the thin driver, and it to remove the Traverse Chassis ass'y. Take out disk. With the Pickup FFC connected, turn over...
..., and a tray is not played back. Front Side 1. Remove the Pickup FFC from the Pickup Interface PWB. 8. After setting the mechanism chassis to prevent the electrostatic discharge damage of the base chassis. 3. Remove the mechanism with higher accuracy, make a replacement as the thin driver, and it to remove the Traverse Chassis ass'y. Take out disk. With the Pickup FFC connected, turn over...
Service Manual
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CIRCUIT CONFIGURATION OF PICKUP The pickup unit reads signals from the disk, and the flexible cable is connected to control. VD + Vref Vcc GND HOLOGRAM LASER UNIT Power adjust 1 TR- 2 FO+ 3 TR+ 4 FO- 5 VR 6 PD 7 VCC 8 GND (NC) 9 LD 10 GND 11 VOS 12 NC 13 NC 14 ... output. This is input to the pin 44 of the monitor diode increases. DV-NC70U/C DV-NC72U 7. POLARITIES OF SIGNAL FO+ TR- As the projection light of the laser diode becomes stronger, the current of the monitor diode increases to control the drive current of laser light increases, the current shown in the disk 14 OPERATION ...
CIRCUIT CONFIGURATION OF PICKUP The pickup unit reads signals from the disk, and the flexible cable is connected to control. VD + Vref Vcc GND HOLOGRAM LASER UNIT Power adjust 1 TR- 2 FO+ 3 TR+ 4 FO- 5 VR 6 PD 7 VCC 8 GND (NC) 9 LD 10 GND 11 VOS 12 NC 13 NC 14 ... output. This is input to the pin 44 of the monitor diode increases. DV-NC70U/C DV-NC72U 7. POLARITIES OF SIGNAL FO+ TR- As the projection light of the laser diode becomes stronger, the current of the monitor diode increases to control the drive current of laser light increases, the current shown in the disk 14 OPERATION ...
Service Manual
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... to perform completely the mechanism adjustment prepare the following special jigs. Video 525 Monoscope NTSC Color Bar Audio 7k 1k HiFi Audio - - For example, the drum assembling, replacement and adjustment service must be sure to maintain the initial performance of take -up and supply reel disks. 4. There are especially used for electrical fine adjustment. DV-NC70U/C DV-NC72U 8. If adjustment needs any part to the threaded hole...
... to perform completely the mechanism adjustment prepare the following special jigs. Video 525 Monoscope NTSC Color Bar Audio 7k 1k HiFi Audio - - For example, the drum assembling, replacement and adjustment service must be sure to maintain the initial performance of take -up and supply reel disks. 4. There are especially used for electrical fine adjustment. DV-NC70U/C DV-NC72U 8. If adjustment needs any part to the threaded hole...
Service Manual
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.... • If voltage applied to rotate the loading motor, please remove/unsolder at frontside. 20 Ejection direction Note Be careful not to insert correctly. INSTALLING THE MECHANISM ON PWB Lower vertically the mechanism, paying attention to the mechanism edge mode SW position, (Set the mode SW position to 270° and make sure the master cam position hole also...
.... • If voltage applied to rotate the loading motor, please remove/unsolder at frontside. 20 Ejection direction Note Be careful not to insert correctly. INSTALLING THE MECHANISM ON PWB Lower vertically the mechanism, paying attention to the mechanism edge mode SW position, (Set the mode SW position to 270° and make sure the master cam position hole also...
Service Manual
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..., and drum. 2. a) Remove two screws 1. Turn off the power switch. 2. After installing the cassette housing control once perform cassette loading operation. 8-6 TO RUN A TAPE WITHOUT THE CASSETTE HOUSING CONTROL ASSEMBLY 1. The master cam turns and stop in eject position. Drive Lever From top view From Bottom View Figure 8-2. 21 Turn on the power switch. 10. Master cam H Weight to center of removal. Remove the full-surface panel. 2. Fit the drive lever to...
..., and drum. 2. a) Remove two screws 1. Turn off the power switch. 2. After installing the cassette housing control once perform cassette loading operation. 8-6 TO RUN A TAPE WITHOUT THE CASSETTE HOUSING CONTROL ASSEMBLY 1. The master cam turns and stop in eject position. Drive Lever From top view From Bottom View Figure 8-2. 21 Turn on the power switch. 10. Master cam H Weight to center of removal. Remove the full-surface panel. 2. Fit the drive lever to...
Service Manual
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... reel disk in the power cord. • Turn off the power switch. Set value EP 6.9 +2.0 -2.5 mN⋅m (70 +20 -25 gf⋅cm) 8-11 CHECKING AND ADJUSTMENT OF TAKEUP TORQUE IN VIDEO SEARCH REWIND MODE • Remove the cassette housing control assembly. • After short-circuiting between TP803 and TP802 provided at operation PWB, plug in the power cord. • Setting Press the playback button and rewind button to...
... reel disk in the power cord. • Turn off the power switch. Set value EP 6.9 +2.0 -2.5 mN⋅m (70 +20 -25 gf⋅cm) 8-11 CHECKING AND ADJUSTMENT OF TAKEUP TORQUE IN VIDEO SEARCH REWIND MODE • Remove the cassette housing control assembly. • After short-circuiting between TP803 and TP802 provided at operation PWB, plug in the power cord. • Setting Press the playback button and rewind button to...
Service Manual
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... the X value adjustment gear driver (JiGDRiVER-6) by the method stated in "8-17 Replacement 3". 2 Connect the oscilloscope to the audio output terminal. 3 Using the alignment tape in which 1 kHz linear audio signal has been recorded, adjust the height screw so as to get max audio output. 5 The adjustment of 3 and 4 twice or three times repeat, and finally adjust 4. 3 Next, press the tracking button (+), (-) and change the ATR signal waveform from max...
... the X value adjustment gear driver (JiGDRiVER-6) by the method stated in "8-17 Replacement 3". 2 Connect the oscilloscope to the audio output terminal. 3 Using the alignment tape in which 1 kHz linear audio signal has been recorded, adjust the height screw so as to get max audio output. 5 The adjustment of 3 and 4 twice or three times repeat, and finally adjust 4. 3 Next, press the tracking button (+), (-) and change the ATR signal waveform from max...
Service Manual
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... is lit, spinning is pushed for 5 seconds.) F0000000 00000000 10000000 ~~~~~~~~ The preparation date display of the program 10000001 00005502 10000002 ~~~~~~~~ Model number display The version display of the program 10000003 00000002 Region number display 10000004 ~~~~~~~~ ~ Micro-code version display 10000005 Servo program version display 10000006 ~~~~~~~~ Source code version display "Playback" Key of the remote control. The DVD and CD laser go out, spinning is performed and the sled moves to...
... is lit, spinning is pushed for 5 seconds.) F0000000 00000000 10000000 ~~~~~~~~ The preparation date display of the program 10000001 00005502 10000002 ~~~~~~~~ Model number display The version display of the program 10000003 00000002 Region number display 10000004 ~~~~~~~~ ~ Micro-code version display 10000005 Servo program version display 10000006 ~~~~~~~~ Source code version display "Playback" Key of the remote control. The DVD and CD laser go out, spinning is performed and the sled moves to...
Service Manual
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DV-NC70U/C DV-NC72U 41 10. YES Is the normal state restored when once unplugged NO power cord is heard from indicator off mode during power off after several seconds? YES NO Are AT 5V voltage line normal? YES Is the low power CTL pin(79) of IC8002? FLOW CHART NO.4 Turn off . NO YES Is the supply voltage of...
DV-NC70U/C DV-NC72U 41 10. YES Is the normal state restored when once unplugged NO power cord is heard from indicator off mode during power off after several seconds? YES NO Are AT 5V voltage line normal? YES Is the low power CTL pin(79) of IC8002? FLOW CHART NO.4 Turn off . NO YES Is the supply voltage of...
Service Manual
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... change from the infrared remote control. Replace loading motor. Operation is inserted?. YES NO Is the specified voltage (about 5V NO to "L" level NO when the cassette tape is possible from "L" to pin(4) of IC701. NO Does power control(H) signal at the loading motor terminal when the cassette tape is pressed? Check IC701. Check Q1905 and the AT 5V line. DV-NC70U/C DV...
... change from the infrared remote control. Replace loading motor. Operation is inserted?. YES NO Is the specified voltage (about 5V NO to "L" level NO when the cassette tape is possible from "L" to pin(4) of IC701. NO Does power control(H) signal at the loading motor terminal when the cassette tape is pressed? Check IC701. Check Q1905 and the AT 5V line. DV-NC70U/C DV...
Service Manual
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... rear input terminal. YES Line output terminal connection: NO Is the audio signal outputted respectively to pin(58)? Is there SIF signal from the pin(27) of IC651 to the pin(11) of IC201. FLOW CHART NO.23 Hi-Fi sound cannot be played back (E-E mode is normal). FLOW CHART NO.24 Hi-Fi sound cannot be recorded (E-E mode is normal). NO Is playback envelope signal outputted...
... rear input terminal. YES Line output terminal connection: NO Is the audio signal outputted respectively to pin(58)? Is there SIF signal from the pin(27) of IC651 to the pin(11) of IC201. FLOW CHART NO.23 Hi-Fi sound cannot be played back (E-E mode is normal). FLOW CHART NO.24 Hi-Fi sound cannot be recorded (E-E mode is normal). NO Is playback envelope signal outputted...
Service Manual
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...disc is removed? (Checking of symptom.) Yes Is FE signal outputted from the pin(22) of IC3301? Yes Check the signal lines between the remote control receiver and the pin(42) of IC8051? OFF SW8053 STOP KEY-1 SW8052 PLAY KEY-2 FLOW CHART NO.3 No operation is activated? Yes No Is the "L" pulse sent out from pin(1) terminal of IC801. Is the LOAD signal inputted...2.5V KEY-1/2 1.8V 0.9V 0V Replace key switch. DV-NC70U/C DV-NC72U 48 (DVD) FLOW CHART NO.1 The fluorescent display tube does not light. Yes Check the signal lines of LCD RESET, LCD CS, No LCD DATA, ...
...disc is removed? (Checking of symptom.) Yes Is FE signal outputted from the pin(22) of IC3301? Yes Check the signal lines between the remote control receiver and the pin(42) of IC8051? OFF SW8053 STOP KEY-1 SW8052 PLAY KEY-2 FLOW CHART NO.3 No operation is activated? Yes No Is the "L" pulse sent out from pin(1) terminal of IC801. Is the LOAD signal inputted...2.5V KEY-1/2 1.8V 0.9V 0V Replace key switch. DV-NC70U/C DV-NC72U 48 (DVD) FLOW CHART NO.1 The fluorescent display tube does not light. Yes Check the signal lines of LCD RESET, LCD CS, No LCD DATA, ...
Service Manual
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... DAC power source periphery circuit. Yes Do you have loading done the disk by normality? Check the loading switch. FLOW CHART NO.7-1 The [No Disc] indication during CD playback. (When the laserbeam does not light.) Yes Is the control signal outputted from pin(4) of IC3301 normal? Yes Check the connection of optical pickup cable. No Yes Check the connection of optical pickup cable. Check or replace...
... DAC power source periphery circuit. Yes Do you have loading done the disk by normality? Check the loading switch. FLOW CHART NO.7-1 The [No Disc] indication during CD playback. (When the laserbeam does not light.) Yes Is the control signal outputted from pin(4) of IC3301 normal? Yes Check the connection of optical pickup cable. No Yes Check the connection of optical pickup cable. Check or replace...