NATIONAL VCR's

NATIONAL MV300 No Traking Control In Playback. Q6003 O/c Replace Bc339
NATIONAL MV300 Not Recording Video Or Audio Check Non Record Supply. C3020 220µ F 6.3v S/c Q3020.
NATIONAL N788 All Functions Work Except Eject. Replace Ic 6001 Mn15342vgd
NATIONAL NV100 All Functions Stop After Several Seconds. As Above, Only Check Photo Sensors Under Take-up Reel.
NATIONAL NV100 Capstan Servo Slow/oscillating Dry Joint Plated Thru Hole Joining R2024 To R2042/c2020
NATIONAL NV100 Capstan Speed Varies. C2017 (10uf), Q2003 Servo C/t
NATIONAL NV100 Drum Int Fast (when Cold?) C2029 47uf Near Ic2003
NATIONAL NV100 F.F. And Rew. Stop After Several Seconds, Play, Rec. Ok. Check Function Of Photo Sensor Under Supply Reel Table. P.No. On2160. Possibly Only Cleaning Of Both Sensor And Underside Of Reel Is Required.
NATIONAL NV100 Int Stops All Functions Reel Sensors Prt# On2160, Clean First.
NATIONAL NV100 Interm. Capstan Speed Varies. Possibly When Cold. Replace Suspect C2017, 10µf 16v, Off Pin 3 Of Ic 2005.
NATIONAL NV100 Interm. Drum Speed Is Very Fast. Possibly Only When Cold. Replace Suspect C2029, 47µf 6v, Near Ic2003.
NATIONAL NV100 Intermittent Stopping Check Microcomputer Port Expansion Chip 16003.
NATIONAL NV100 No Colour Rec/play C8009
NATIONAL NV100 No Pic Or Audio In Ee Q733
NATIONAL NV100 No Playback Colour For First Few Seconds. (depends On How Long Machine Has Been Switched Off After Overnight Rest 3 Mins.) Replace C8009 Near Ic8001.
NATIONAL NV100 No Power No Go F6501 T2a
NATIONAL NV100 No Sound At Turn On, Then Sound Appears Slowly. C4008 In Sound Section Leaky. 22uf 10v
NATIONAL NV100 No Video (int) In Playback D/j On Ic3001
NATIONAL NV100 Not Erasing Previous Video/audio Q1012 2sb643 Ic1002 Vcr0044
NATIONAL NV100 Not Recording Colour Ic8002
NATIONAL NV100 On Tuner No Display C6763 10uf Reset Pcb
NATIONAL NV100 Playback Audio Check Voltage At Pin 1 Of Ic4001 If Low (2vo Instead Of (4.3v) Replace C4016.
NATIONAL NV100 Takeup Idler Not Turning In Play. Ff & Rw Ok Remove And Clean Play Idler Gear Assy (transmit Arm Unit.
NATIONAL NV100 Turns Off After 10 Sec. Stop Led Flashes On Eject R6402 O/c May Need Ic6401 & Load Mtr
NATIONAL NV100 Turns Off After Several Seconds, No Reset Mechanical R6421 1k Ic6401 If 12v Ok On Pins 2,3 Ic6401
NATIONAL NV100 Unit Wont Go Into Full Load Pos. After R6401 Has Failed. Replace Only With .47 Fusable Resistor. Loading Mechcon.
NATIONAL NV100 Vtr Turns Off After Several Sec. No Mech. Reset At Vtr On. Check R6421, 1k Ohm. Suspect Ic6401, Vcr0045, If Supply 12v O.K. At Pins 2 And 3 Of Ic 6401 And No Output To Motor On Pins 8 And 12.
NATIONAL NV100 Wont Pause. Is The Front Panel Pluged In. Ie Slow Tracking Controll
NATIONAL NV180 Picture Faulty Due To Constantly Changing Cylinder Speed. Check For Dry Joint On Capacitor C46, Mounted On Trackside Of Main Pcb Under Ic2, Near Drum Motor Connector.
NATIONAL NV180 Snowy Pic. Looks Like One Dirty Video Head. Check For Faulty Or Dry Joint C2531, 0.1µf, Off Pin 22 Of Ic 5 On Main Pcb.
NATIONAL NV180 Wont Go Battery Charge Mode When Conn. To Vw-a18 Charger. Check For Open Circuit Track On Main Pcb Between: Pin 2 Of P215, Rear Right=hand Corner; And Anode Of D6501, Front Right Ahnd Corner. Track On Component Side Of Pcb Too Thin To Carry, Use Wire Link To Join These Two Points.
NATIONAL NV180 Wont Rewind. F.F. For Only A Few Sec. Replace Reel Stator Base Unit Vxa2045.
NATIONAL NV2000 Capstan Motor Fails To Start After Lace Up. Check .5v On T.P. 2008 In Playback. Replace Q2015 - use 2sc1826.
NATIONAL NV2000 Clock Failure With No Display Check 100 Ihm Safety Resistor (r7632 In Nv 366), Check Back Up Battery Is Not Leaking.
NATIONAL NV2000 Clock Wrong Resets. Ic7501 (mn1435vx).
NATIONAL NV2000 Display Slow In Coming On, Disappears When Switched On. Replace C1009 (1000 Mfd).
NATIONAL NV2000 Distorted Pic In Pb,no Test Sig,no Clock C1009 Replace
NATIONAL NV2000 F/f When Rewind Selected. Plays Fast 9v Reg U/s, Q6012, Q6013 Syscon
NATIONAL NV2000 Good Picture On Playback Poor On Record. Suspect Video Head.
NATIONAL NV2000 Head Speed Varies, Switches To Standby After Warm Up. H.S.W.P. Disappears, All Other Waveforms On Ic701 Correct, R772 Was 47 Ohm, Change To 470 Ohms.
NATIONAL NV2000 Int Colour Recording When Hot. Loss Of Afc Sync (afc Osc Tp505 Not Synced With Video Signal Tp509). Replace Ic503 And Adjust Afc.
NATIONAL NV2000 Int Jams Up. Replace Mode Switch Or Load Belt.
NATIONAL NV2000 Int Tracking Head Speed Too High. Very Low Fg Signal, Fg Coil Int Contact, Replace Lower Head Drum Assembly.
NATIONAL NV2000 Load Motor Wont Return Mode Switch To Correct Position. Replaced D6010.
NATIONAL NV2000 No Audio Record. No Supply To Bias Osc. (q617 S/c)
NATIONAL NV2000 No Clock - No Functions. Q1007 In P/s.
NATIONAL NV2000 No Picture Recording. O/s F1201.
NATIONAL NV2000 No Play/ff/rew. Q6004 O/c.
NATIONAL NV2000 No Playback, No Sound. Replace Ic801 If Pin 35 Permanently High.
NATIONAL NV2000 Not Tracking, Head Speed Too Fast. Ic704 Faulty (s/c)
NATIONAL NV2000 Picture Off Tape Unstable. Back Tension Band Pad Faulty.
NATIONAL NV2000 Pinch Solonoid Wont Pull In. Readjust Mode Switch.
NATIONAL NV2000 Play Mode Then Stops. Capstan Wont Operate In Play/rec. Replace Both Loading Belts.
NATIONAL NV2000 Poor Tv Reception Through Vcr And In Ee Mode. Replace All 3 Transistors In Rf Unit.
NATIONAL NV2000 Servo Slow To Lock In,colour,sound Variation When On. Drum Or Capstan Lock Out Of Adjustment.
NATIONAL NV2000 Slow Capstan Speed Poor Tracking. Replace C1009 In Power Supply.
NATIONAL NV2000 Slow Capstan, Hum On Video. C1009 1000 Mfd 35v Faulty.
NATIONAL NV2000 Snowy Picture. Rf Amp Earth Loose (top Of Can) Tighten Screw.
NATIONAL NV2000 Stops For No Reason After A Long Period Of Time. Int Reel Motor - Try Clean And Lube Otherwise Replace.
NATIONAL NV2000 Tape Gets Stuck In Housing. Replaced D6010.
NATIONAL NV2000 Tape Jammed In Unit. Bad Crimp Connection On Plug.
NATIONAL NV2000 Tape Jams In Houseing, Mode Selec. Switch Wont Go Neut.Pos. Replace D6010.
NATIONAL NV2000 Tape Not Rewinding Into Cassette. Reel Idler Slipping (clean)
NATIONAL NV2000 The Timer Will Not Program. Change Clock I.C.
NATIONAL NV2000 Timer, Demod,capstan Motor 18v Low When Vtr Switched On. Collector Of Q1007 Drops In Value. Change C1009 And/or leaky D1011.
NATIONAL NV2000 Tracking - Noise Bars. Loading Arm (b) Not In Location - Double Acting Spring Loose, Reinsert Spring.
NATIONAL NV2000 Vtr Indication On At All Times. Short In 6v Line. F1003 O/c Ic1501 In Power Supply Faulty. Zener Diode 6.8v. D7542 On Timer Pcb, Short Or Leaky.
NATIONAL NV2000 Wont Tune Sound, Pic. Together. No Sound On Prerecor. Tape. Change C4019 (o.33mfd) O/c.
NATIONAL NV250 After Goes Into Play Mode Stays Laced Up But Stops. Replace Mode Select Switch. (to Be Done In Eject Mode And Align V Notch).
NATIONAL NV250 At Power On Capstan Rotates For Approx 6 Sec.,turns Off. Change Ic6003 (ba6238)
NATIONAL NV250 Capstan Wont Start When Laced Up For Play Or Record. Faulty Mode Switch.
NATIONAL NV250 Capstan Wont Start. Turns Off Mode Switch Vss0110
NATIONAL NV250 Clock Erratic Wont Flash Q6001 2sb636
NATIONAL NV250 Display Fully Lite Ic6501 Mn15823vtt
NATIONAL NV250 Drum Stops And Vcr Turns Off. Faulty Mode Switch.
NATIONAL NV250 E-e Tuner Mode Ok, On Playback Blank Screen Audio Burst Change Ic6003 (mn15342 Vg1 Or Vgp)
NATIONAL NV250 Eject Button Pressed In Play, Ejects Without Going Into. Replace Mode Select Switch. (to Be Done In Eject Mode And Align V Notch).
NATIONAL NV250 Erratic Mechanical Behaviour Mode Switch Vss0110
NATIONAL NV250 Loads Then Unloads, Slow Rewind Mode Switch Vss0110
NATIONAL NV250 No Channel Display Or Select. Change Ic7501 (mn14824vtu).
NATIONAL NV250 No Colour In Playback Q8001 2sd636 Or Ic801
NATIONAL NV250 No Colour On Playback. Change Q8001 (2sd636) Or Chroma Pack Vefc009.
NATIONAL NV250 No Display If Pin 9 Of Ic2005 Lower Than 2.8v Adjust Reset Vr7502.
NATIONAL NV250 No Display Check Adjustment Of Reset Vr7502
NATIONAL NV250 No Display R1103,q1101,d1105
NATIONAL NV250 No Flashing Display Change Q6001 (2sd636)
NATIONAL NV250 No Functions, On Clock. Check R1103 O/c, Q1101 (2sa684) And D1105 (30v Zener). if 30 Volt Line Still Low Check Q7503 (2sd637r)
NATIONAL NV250 No Go No Display Check R1103 O/c ,ic 6501 Mn14824vtu
NATIONAL NV250 Not Dectecting End Of Tape Led Sensor D1501 Vjb00c48
NATIONAL NV250 Picture Rolls, Loss Of Control Signal. Capstan Servo Roll. Replace Faulty Capacitor, C2031 47uf 10v near Ic 2005 An6356n
NATIONAL NV250 Play And Record Stops Intermittently. Change Ic2005 (an6356n), Suspect Photo Interrupter (on2106)
NATIONAL NV250 Poor Lum In Ee & Colour Int Ic301 Lumance Pack Vefy007
NATIONAL NV250 Poor Remote Distance D/j On C6504
NATIONAL NV250 Power Up Capstan Rotates Then Turns Off Ic6003 Ba6238 Also Check Worm Wheel On Eject Asy.
NATIONAL NV250 Preset Stations Go Blank When Selecting But Retain Mem Ic7503 Mn1228
NATIONAL NV250 Preset Stations Inter. Go Blank Raster. Still In Memory. . Replace Ic7503 (mn1228)
NATIONAL NV250 Remote Control Not Operating Over 1.5 Metres From Vcr. C6504 On Display Pcb Possible Dry Joints.
NATIONAL NV250 Stops In Pause Mode. Faulty Mode Switch.
NATIONAL NV250 Stops In Play And Record Int Ic 2005 An6356 , Photo Interrupter On2106
NATIONAL NV250 Switchs To Bypass Mode When Hot 5v Line Low Q1003,q1004, Adjust Vr1001
NATIONAL NV250 Unlaces And Slow Rewinds When Review Pressed. Faulty Mode Switch.
NATIONAL NV250 Vcr Not Switching Off. Change Ic7504 (mn145532vtw)
NATIONAL NV250 Vtr/tv Sw Int Operation D/j Pin 18 Ic 7502
NATIONAL NV250 Wont Accept Tape. Wont Fully Eject Tape. Replace Worm Wheel On Eject Assy.
NATIONAL NV250 Wont Rec/play Int 5v Supply Low (tp1001) Adjust Vr1001 Or Q1003,q1004
NATIONAL NV280 After Goes Into Play Mode Stays Laced Up But Stops. Replace Mode Select Switch. (to Be Done In Eject Mode And Align V Notch).
NATIONAL NV280 Does Not Memorize Stations. Replace Ic7503 (an1228).
NATIONAL NV280 Drum &/or Capstan Varies Speed Or Fast Ic2003 Mn6168vif
NATIONAL NV280 Eject Button Pressed In Play, Ejects Without Going Into. Replace Mode Select Switch. (to Be Done In Eject Mode And Align V Notch).
NATIONAL NV280 Low Capstan Motor Torque. Check Value Of R2029 (56k)
NATIONAL NV280 No Clock Or Channel Display Ic7502 An5033
NATIONAL NV280 No Clock Or Channel Display. Change Ic7502 (an5033)
NATIONAL NV280 No Clock. Q1101 Shorted & Zener Diode D1105 (30v) S/c.
NATIONAL NV280 No Go C1116 1000uf/10v
NATIONAL NV280 No Or Low Capstan Speed R2018 .82 Fuseable (must Be Replaced)
NATIONAL NV280 No Power R1103 O/c. Power Supply.
NATIONAL NV280 Not Sensing End Of Tape.Not Going Into Auto/rewind. Q6006(2sd636) And And R6048,connecting Photo Sensor To Processor.
NATIONAL NV280 Sometimes Catches Tapes.Capstan Motor Starts To Jerk And Stall Until Unit Shuts Off And Leaves Tape Out Of Cassette. Mn6168vif Ic On Main Board Under Tuning Section.
NATIONAL NV280 Supply Rails High Replace C1110 C1111
NATIONAL NV280 When Pause Selected In Playback, Tape Speed Increases. Change Ic2003 (mn6168vif)
NATIONAL NV280 Wont Acceppt Tapes Ic2 An3821 Tf1 Thermnal Fuse
NATIONAL NV280 Wont Remember Stations Ic7503 Mn1228

Last Updated on 20/09/98
By Allan
Email: allan@vidcam.com.au