NATIONAL VCR's

NATIONAL NV370 50 Hz Everywhere, No Video Distorted E.E. 2200 Ufd 25vw O/c In P/s.
NATIONAL NV370 Accepts Tapes Then Ejects. Eject Load Belt Or Eject Switch's Vsm0048
NATIONAL NV370 All Function Lights Are On Irrespective Of Operation. Change Q6501,16501.
NATIONAL NV370 Aud On Tuner Mutes When Afc Is Activated,closing Tune Door Check For Faulty C7105, 10µf 16v On Ch.Preset Pcb.
NATIONAL NV370 Capstan Motor Oscilates Then Shuts Down. Replace R1101 In Power Supply.
NATIONAL NV370 Capstan Motor Oslilates And Then Turns Off No Functions R1101 In Psu, R1105 O56 Fusable
NATIONAL NV370 Capstan Motor Speed Varies C2025,c2026,c2027 4.7µf/25v
NATIONAL NV370 Capstan Plays Fast Ic2002 Mn6168vif
NATIONAL NV370 Chewing Tapes. Replace Idler Pulley.
NATIONAL NV370 Chews Tapes. Motors No Go. Mode Switch
NATIONAL NV370 Clock Display Ok. On/off Inoperative. Replace Resistor R1001 On Power Suppy Pcb.
NATIONAL NV370 Counter Display Flashes B/t Dew And Normal Modes Ic 6501 Front Pcb..
NATIONAL NV370 Dew Sensor On , Drum Spins All Time Modify Dew Sensor With Earth Wire *
NATIONAL NV370 Distorted Sound. Change Ic4001 (ta7355pp) *
NATIONAL NV370 Distorted, Hum Bars In Pic. In Playback Or E.E. Replace Capacitor C1102 In Power Supply (uprating Voltage Rating Of Capacitor May Be A Good Idea).
NATIONAL NV370 Drum Fails To Start. Low Torque Drum Windings Faulty. Buy New Vcr! * *
NATIONAL NV370 Erratic Mechansim Behaviour Mode Switch Vss0091
NATIONAL NV370 Function Display All Lite Up Ic6501 Mn1250bvf2
NATIONAL NV370 Goes Dead Interm.,led "on" Tape Counter Indic.Fails For Sec Check 3.0v Zener Diode D1002 In The Regulator Circuit.
NATIONAL NV370 Goes Into F.F. When Play Is Pressed.F.Rew. When Rec Is Selc Change C6011 O/c On The Syscon Board.
NATIONAL NV370 Int Failure To Retract Tape When Unloading. Faulty Mode Select Switch Pt. No. Vss0110.
NATIONAL NV370 Int Turning On And Off Completely. Mains Transformer Windings Int. Replacement: Etp57pso1a.
NATIONAL NV370 Interm Capstan Goes In Rev. Or Counter Counts In Rev.In P/b Replace Mode Select Switch.
NATIONAL NV370 Interm. Horiz. Twitching And Pulling On Playback. "sticking" Of The Impedance Roller Up-stream Of The Full Erase Head. The White Roller And Its Insert Should Be Replaced.
NATIONAL NV370 Intermittent Recording. Change C3523 (near Base Of Q3501).
NATIONAL NV370 Low Drum Torque. Interm. Drum Fails To Start Play. Change Ic2005 (an6387) * *
NATIONAL NV370 Low Gain On Recieve. Replace Q3.
NATIONAL NV370 Low Gain Tv Pic.,hum Bar When Test Signal Is Switched On. C1102 (2,200mfd) Leaky.
NATIONAL NV370 Machine Goes Into Dew Alert Mode With No Dew Present. Check Earth On Dew Sensor Mount And Tighten Screw.
NATIONAL NV370 Motor Fails To Start.Tape Tangles. Change Mode Switch.
NATIONAL NV370 No Capstan Drive C2020 * *
NATIONAL NV370 No Capstan Drive. Check An3822 Capstan Drive Ic Also .68ohm Resistor Not Shown On Cct It Feeds Pin 24 Of Ic, Occasionally It's A Wire Lik Marked R69.
NATIONAL NV370 No Display R1002 1O5 Fuseable
NATIONAL NV370 No Display And No Functions. Check R1001 O/c, Replace With .39 Ohms. Main Pcb Near The Rear Of Pcb (in Power Section).
NATIONAL NV370 No Functions And No Display. Check The -30v Line Is Missing. Replace Q1102, 30v Zener (d1109), R1102.
NATIONAL NV370 No Go, Power Light On (dim) Ch Light (dim) R1 O/c Bottom Board O/c.
NATIONAL NV370 No Go. Mode Selector Switch.
NATIONAL NV370 No Go. Thermal Link Bottom Board O/c.
NATIONAL NV370 No Go. No Power. Cracked Cct Board (pcb Joins Bp201) 12v Zener S/c. *
NATIONAL NV370 No Luminance. Flashing Colour In Display. Change Vefy005 Pack.
NATIONAL NV370 No Picture In Playback D/j Q3562 Luminance Pcb.
NATIONAL NV370 No Playback Colour. Check Ref. Freg. Is Way Off Replace P.C.B. Module.
NATIONAL NV370 No Power. Power Light Comes On, Goes Off. Check Timer Rec Switch.
NATIONAL NV370 No Record Or Playback. C1102 Faulty.
NATIONAL NV370 No Rf Output In Tv Or Video Modes Check Q1101 For Dry Joints (no 12v To P702)
NATIONAL NV370 No Tape Funct. Drum Const. Spinning "d" In Clock Display. Solder Wire From Earth Side Of Dew Sensor To A Convenient Earth Point On Machine (the Earth Shield On Tuner If Section Is A Really Good Spot).
NATIONAL NV370 Noise Bar On Screen Every Six Seconds. Change C2006 100 Mfd O/c. *
NATIONAL NV370 Noise Bars Every 6 Sec No Drum Sync C2006 100µf/6v
NATIONAL NV370 Noisy Sound In Record Mode. Change Ic4001,ta7355p.
NATIONAL NV370 Not Loading Tapes In Play Ic6003 Ba6209
NATIONAL NV370 Not Recording Qr6005 Dta124a Syscon
NATIONAL NV370 Not Tunning Stations 31v Rail Low Check C7103 .01µf
NATIONAL NV370 Pb To Ee Picture Stays In Play Qr6006 Dta124a Syscon * *
NATIONAL NV370 Picture In Playback And E-e Greatly Distorted. Change C1102 2200 Mfd 50v In Power Supply. *
NATIONAL NV370 Poor Lumina, Chroma Flashes In Play Vefy 005 Pack
NATIONAL NV370 Poor Luminance In Pb C3523 47µf/6v Luma Pcb
NATIONAL NV370 Poor Pic, Large Drop Outs C3504 100µf/6v Near Ic3501 *
NATIONAL NV370 Remote Functions Not All Working.Eg..Play Not Working. Remote Lead Has To Much Capacitance.Change Lead.
NATIONAL NV370 Sometimes When Rew/f.F Is Selec. Machine Wont Function. Change Mode Switch (ve50246) And Idler Arm Unit (vxpo521).
NATIONAL NV370 Tape Jams With No Other Functions. Check R1001 .12ohms For O/c.
NATIONAL NV370 Tape Loads Up Runs Backwards...Chews Tape,counter Runs Back Check Pin 39 Of Ic6001 Is Above 1v If So, Change Ic6001 And Ic2002.
NATIONAL NV370 The Take-up Spool Doesn't Rotate In Play Mode. Fit Modified Idler Assembly, Part No. Vxp0521. The Improved Idler Can Be Identified By The Blue Plastic Moulding Or Black Dot On The Left-hand Side Of The Idler Arm.
NATIONAL NV370 Timer Resets To Zero,after Being Corrected,reset To Zero. Change Clock I.C.
NATIONAL NV370 Video In Play And Ee Distorted Bad C1102 2200µf/50v Psu *
NATIONAL NV370 White Pulses On Replay Check Screw In Lower Pcb Head Amp Section
NATIONAL NV370 Will Not Inject Cassette. Check Switches On Cassette Carriage Vsm0046. *
NATIONAL NV370 Wobbling Picture With Slight Interference On Sound. Check Tape Is Not Rubbing Against Washer At Bottom Of The Impedance Roller.
NATIONAL NV370 Wow & Flutter. Motor Torque Low Ic 2004 An3822, Capstan Stator. Vek2129
NATIONAL NV450 Clock Ok But No Operate. F1102 O/c No 12v Unswitched Or 18v Unreg.
NATIONAL NV450 Display Goes Weird, Flashes Weird Numbers, Or No Display.] rest Of Machine May Work. Replace Crystal On Top Tuner Adjust Board. x1 Near Ic 7501.
NATIONAL NV450 Hum On Ee.Video In B/w Power Supply Caps C1104 And C1103
NATIONAL NV450 Loads Up, Plays For Few Secs. Stops And Unloads. Faulty Photo Interupter Under T/u Spool Should Switch At +5 Volts.
NATIONAL NV450 No Display, No Operation. Reset Line Pulsing, No Switched 12.7v, Unreg 45v Noisy. C1102 100uf 63v Cap O/cct
NATIONAL NV450 No Mechanical Reset At Vtr On Check Tf2001, Temperature Fuse, P.No. Eyp2br163g Mounted On Capstan Drive Ic,an3821k
NATIONAL NV450 No Record Or Playback. Rf Converter Faulty.
NATIONAL NV450 Picture Wanders Horiz. And Music Sounds Awful. Check Setting Of Servo Motor, Control Track Clean, Vibrating Exit Tape Guide, Or Mechanical Resonance In Audio Control Assembly.
NATIONAL NV450 Plays B&w And Ee Noisy, Or Hum Bar Through Picture. C1002 O/c (100uf 35v)
NATIONAL NV450 See Nv250  
NATIONAL NV450 Slow Ff/rw, Fsearch Drops Into Ff, Rsearch Drops To Rewind Replace 1c2003 (mn6168vif)
NATIONAL NV450 Stops Itermittently Or When Warm In Play Or Record. Check Tf2001, Temperature Fuse, P.No. Eyp2br163g Mounted On Capstan Drive Ic,an3821k
NATIONAL NV450 Tape Plays /rec. For A While Then Stops. Counter Interm . Replace Reel Sensors.
NATIONAL NV450 Vtr Switches Off By Itself Or Won't Switch Off Remote Fault Check Function Of Ic 7504, Mn14531vtv
NATIONAL NV450 Won't Play, No Capstan Motor Fwd,capstan Reverse Ok Check Ic 2002,an3821k On Main Pcb. Pin 11 Should Be Low In Play, High In Rewind
NATIONAL NV450 Wont Accept Tape. Wont Fully Eject Tape. Replace Worm Wheel On Eject Assy.
NATIONAL NV470 Colour Drops Out, Hum Bar In Colour C1002 O/c ( 100uf,25v)
NATIONAL NV470 No Vtr No Display Reg 12v Low. D1001-d1004 O/c
NATIONAL NV470 Powers-up.Clock Ok.Accepts Tape But No Functions. Diln59 Diode Led For Sensors.
NATIONAL NV470 Tv Pic Snowy With Vcr Operate Off 12v On Pin8 Of P1101 R/s , D1108 13v Zenner
NATIONAL NV600 Cannot Set Colock Or Program Modes Sw 7504 Esd14182
NATIONAL NV600 Capstan Fails To Start In Play Or Record Modes. Change O/c R2031, 100 Ohm.
NATIONAL NV600 Capstan Speed Fast R2080 12k C2048 100µf
NATIONAL NV600 Capstan Speed Faulty C2038 10µf/16v
NATIONAL NV600 Capstan Speed Too Fast On Playback. Check Value Of R2080, 12k Ohms, Or D/j On C41.
NATIONAL NV600 Chews Tapes In Record Pause Mode Pinch Roller Clearance,adjust Screw
NATIONAL NV600 Drum Int Stops Or No Start C2023,c2024,c2025 .22µf/50 Tant
NATIONAL NV600 Drum Motor Intermittently Fails To Start In Play Or Rec Mode Or Wont Start At All, Or Has Low Torque Suspect Ic 2001, Upc1405c,in Servo Circuit.
NATIONAL NV600 Drum No Go Ic2002 An6677
NATIONAL NV600 Ejects After 8 Seconds And No Functions. Change D6025. Ma165.
NATIONAL NV600 Fails To Start After Entering Play Or Record Mode. Check O/c R2059, 6.8ohm 1w. Or Change Ic2002 (an6677).
NATIONAL NV600 Interm. Capstan Speed. Dry Solder Joins On Capstan Motor Drive Transistors Q18, Q6017 And Q6013 On Main Pcb Servo Section.
NATIONAL NV600 Low Audio In Ee C759 10µf
NATIONAL NV600 Luminance Or Playback Fades After 10 Sec. Change Ic3002, (an6337).
NATIONAL NV600 No Chroma. D8004 Leaking.(ma165)
NATIONAL NV600 No Clock Or Channel Select. Change Ic7504, Mn1228 Or Ic7505, An5033.
NATIONAL NV600 No Rew. Or Ffd. Check D1506 And D1505.
NATIONAL NV600 Not Selecting Stations. No 28v To Pin G Of Ic7504, Replace O/c R7547, 100k Ohms.
NATIONAL NV600 Not Storing Stations Missing 28 V Ic7504 Check R7547 100k
NATIONAL NV600 Not Tunning Stations R7543 180O
NATIONAL NV600 Plays Slow Audio, No Picture. Audio Buzz In Ee No Picture. Q1003 Dry Joints
NATIONAL NV600 Poor Colour In Playback. 3300uf/16v Cap In Power Supply
NATIONAL NV600 Poor Luminance In Pb Ic3002 An6337
NATIONAL NV600 Poor Picture From Self Record C2004 10µf/16v Or Heads
NATIONAL NV600 Poor Picture In Play.Drum Speed C2024 .22µf/50v
NATIONAL NV600 Poor Picture In Still And/or Cue Modes. Relay Ry3001 Dirty Contacts On Main Board Under Sheild On Main Board 9 Volt Dp Dt Mini Relay See Wes Cateldog
NATIONAL NV600 Power Stays On 10 Seconds Then Power Off. Check Cassette Carriage Position Switches.
NATIONAL NV600 Tangles Tapes In Search And Review Modes. Check R2096, 39 Ohms In Capstan Brake Circuit.
NATIONAL NV600 Tapes Tangle In Cue Or Review R2096 39O Fusiable
NATIONAL NV600 Tuning Faulty. Replace R7543, 180 Ohms.
NATIONAL NV600 Vcr Stays On Few Sec Then Off Check Carriage Switchs
NATIONAL NV600 Wont Rewind . Locks Up Take Upreel Replace Brake Pads On Brake Arms , The Spring Loaded One
NATIONAL NV7000 Black Pic In Pause And V/search Q6709 False Vert Sync C/t
NATIONAL NV7000 Clock Display Segments Wrong But Still Programs Correctly. Replace Three Driver Ic's All Icta57.
NATIONAL NV7000 Clock Display Wrong. Replace Driver Ic's (3) Ta57
NATIONAL NV7000 Digits In Clock Go Out,days Go Brighter When Mode Is Selec. Check Ha1780 6v Regulator Ic501 And 12v Line If Ok Check For D/j's On Timer Panel, And Steady 262khz On Pin 40 Of Ic7505.
NATIONAL NV7000 Int Speed Scearch Shaft On T/u Clutch Too Tight C&lub
NATIONAL NV7000 No Capstan Lock C2040 47µf/16v
NATIONAL NV7000 No Clock Display Q7501 2sc1683 , D7501 O/c
NATIONAL NV7000 Noise On Screen Cannot Adjust Pg Ic2001 An6350
NATIONAL NV7000 Noisy Shuttle Search. Replace Or Readjust Mode Switch.
NATIONAL NV7000 Pinch Solenoid Wont Pull In. Clean Capstan Shaft.
NATIONAL NV7000 Poor Tv Reception Through Vcr And In Ee Mode. Replace All 3 Transistors In Rf Unit.
NATIONAL NV7000 Snowy Picture. Rf Amp Earth Loose Tighten Screw At Top Of Can, Change Q3 In Amp.
NATIONAL NV7000 Will Not Vtr On. No Sw. 12v At Pin 1p1003. Change Q1003, Use 2sc1847 and Zener Diode D1015 13v.
NATIONAL NV7200 Drum Speed Faulty C2030,c2031,c2032 .22µf/50v
NATIONAL NV7200 In Timer Mode Rec. Led Flashes, Tape Laces Up,runs Spasmod. Change Microcomputer I.C.
NATIONAL NV7200 Int Failure To Record. Check If 9v On Pin 9 Of Ic3001 If So Check Q3003.
NATIONAL NV7200 Int No Play. Usually After Lace Up Then Unloads. Check For Bad Contacts On The Cassette Detect Leaf Switch.
NATIONAL NV7200 Int Operation Especially In Timer Mode. 1: Mechanics Still, Sliding Bars Need Oiling (both Sides.) 2: Mechanic Sensor Switch Faulty Contacts. 3: Check Leading Belt.
NATIONAL NV7200 Int Play Mode Table And Reel Jamming. Change Supply Reel Table Unit.
NATIONAL NV7200 No Functions R1019 120O O/c
NATIONAL NV7200 No Reel Drive Q6046 2sd973
NATIONAL NV7200 No Timer Programming. Check Clock Operation If Ok Check Program Switch For Bad Contacts.
NATIONAL NV7200 Noisy Shuttle Search. Readjust Mode Switch Or Replace.
NATIONAL NV7200 Pinch Solenoid Wont Pull In. Clean Capstan Shaft.
NATIONAL NV7200 When Play Pushed,clock Loses Time And Display Goes Haywire. C1005 On 13v Rail.
NATIONAL NV7200 Wow In Sound. Both Record And Play Modes. Check Tp2009 For Phase Lock Drift If Present Check Capstan Motor For Tight Bearings, Also Back Tension, If Ok Change Capstan Motor.
NATIONAL NV730 Changes B/t Lp To Sp On Lp Tapes Clean Control Head
NATIONAL NV730 Chews Tapes P5 Arm Unit Seized Vxl1223
NATIONAL NV730 Chews Tapes Int Dj On Power Transistor Q1504 On Heatsink Rhs Rear.
NATIONAL NV730 Display Faulty X7504 Vsx0138
NATIONAL NV730 Faulty Inject Or Eject. Vtr Turns Off. Replace Gear On Cassette Carriage P. No. Vxp0604.
NATIONAL NV730 Flag Waving Check Exit Guide Vxp0444
NATIONAL NV730 No Backup Memory Check "gold Caps"
NATIONAL NV730 No Capstan Drive Ic2004 An3822, Or Capstan Mtr Vek2208
NATIONAL NV730 No Capstan Drive In Play Or Record Modes. Check R2094 And R2054. If Ok Replace Ic2004, An3822k With An3821k.
NATIONAL NV730 No Drum Int C2018 3.3µf
NATIONAL NV730 No Drum Spin Ic2003 An6387
NATIONAL NV730 No Go Ic 6004 Ba6209 Load Mtr Ct.
NATIONAL NV730 No Go Clock Ok Ic6001 Mn15342vgd, X6001 Vsx0082, Ic7504 Mn1228
NATIONAL NV730 No Go F1003 O/c Ic 1501 Stk5361l R1505 68 O Fusiable
NATIONAL NV730 No Go Missing 30 And 45 V Rails R1002 4O7
NATIONAL NV730 No Go No Clock Display R1002 4O7
NATIONAL NV730 No Go No Clock Display Ic7503 Mn1512vtj
NATIONAL NV730 No Or Intermittent Reel Motor Drive.Eject, Tape Caught Cyl. Check For D/j On Power Transistors, Q1504, Mounted On Heatsink.
NATIONAL NV730 No Reel Motor Function. Resolder Q1504 And Bp1504.
NATIONAL NV730 Not Eject Tapes Or Accept Worm Drive Vxp0575
NATIONAL NV730 Pic Flutters Entry Guide Vxp0444
NATIONAL NV730 Tapes Crease In Cue Review Wear In Capstan Bearing
NATIONAL NV730 Turns Off When Ejecting Carriage Switchs Vsm0050
NATIONAL NV730 Vcr Turns On Then Off 4 Sec Carrige Switches. Vsm0050
NATIONAL NV730 Vtr On, Rewinds For 4 Sec. Then Turns Off. Check Position Of Cassette Carriage Position Switches.
NATIONAL NV730 When Play Mode Selec. After 1 Hr. Unlaces And Turns Off. Change Ic2004 See Fault In This Model.
NATIONAL NV730 Wont Memorize Stations Ic7504 Mn1228
NATIONAL NV730 Wont Play. Not Lacing Up Mode Switch Ves0091
NATIONAL NV730 Wont Switch On Not Accepting Tapes Ic6005 Ba6209
NATIONAL NV777 Accepts Command With No Tape In Unit. Rew Command Ok. Check Main Cam Plastic Cog For Missing Teeth. (set Mode Switch For Stop Not Eject).
NATIONAL NV777 Capstan Fast Ic2008 Or C2047-2049
NATIONAL NV777 Capstan Runs On From Cue Chews Tapes Int? C2047,c2048,c2049 .47µf/50v Rl6409 *
NATIONAL NV777 Chews Tapes P5 Arm Seized Vxl1047
NATIONAL NV777 Drifts Off Tune Mn1228
NATIONAL NV777 Drum Motor Fails To Start. Low Drum Torque. Replace C2059, C2060 And C2061, 0.22µf 50v. Also 2.2 µ Caps On Same Ic
NATIONAL NV777 In Play,cue Mode When F.Fwd Button Released Play Wrong Speed Replace C2047, C2048 And C20249, 0.33µf 50v.
NATIONAL NV777 Int Chroma Lines In Pb Dj On Ic3001 Thickfilm
NATIONAL NV777 Int Power To Vtr Power Transformer Int
NATIONAL NV777 Jitter In Pause Mode. Rubber Plug On R.H.S Of Machine Gives Access To Present Adj.
NATIONAL NV777 Lack Of Line Lock. Check Whether The Drum Pg Pulse Is Present At Tp2006. If Not, Replace The Drum. If The Pg Pulse Is Present, Check Switching Pulse Is Present At Tp2011. If Not,suspect Ic2003 (an6346n). If Switching Pulse Is Ok Check The Squarewave Output At Pin 27 Of Ic2
NATIONAL NV777 Looks Like Faulty Heads, One Head Only At Rf Test Point. C3034 Leaky (10uf/25v)
NATIONAL NV777 No Capstan Drive C2021 10 µf/16v
NATIONAL NV777 No Clock Or Screen Functions. R7560 Thermal Resistor On 40 V Rail. Located On Timer/operation Pcb
NATIONAL NV777 No Functions Wont Switch On. Replace Reset Capacitor On Ic6001.
NATIONAL NV777 No Go But Clock Ok Mode Switch Vss0060
NATIONAL NV777 No Playback Or E.E. Sound Lcd Counter Display. Check Q6062 (2sc1847) On Syscon Board O/c Bd137 Ok.
NATIONAL NV777 No Reel Motor Drive Q6016,q6017 Or Ic6007 Sta131a
NATIONAL NV777 Slow Or Fast Capstan When Hot? Ic2001 Mn6168via
NATIONAL NV777 Slow Or Fast On Playback. Often Only When Hot. Replace Ic2001, Mn6168.
NATIONAL NV777 Tape Plays /rec. For A While Then Stops. Counter Interm . Replace Reel Sensors.
NATIONAL NV777 Tv Jitter In Pause. Adjust Jitter Pot.
NATIONAL NV777 Vtr And Clock On,wont Inject Tapes, No Mech. Functions. Check Position Of Mode Switch. P. No. Vss0060.
NATIONAL NV777 Wont Tune Channels. R7019 O/c On Tuner Board.
NATIONAL NV778 See Nv777  
NATIONAL NV788 See National Nv777  
NATIONAL NV830 No Capstan Motor Drive In Playback, Rew Or F.Fwd. No 12v On Pin 24, Ic4. Repair Fusible Link W313.
NATIONAL NV830 No Colour. Check 12v Rail, Also Q1003 And D1004 For Leakage.
NATIONAL NV830 No Tuner Picture. Check Transistors Q7006 And Q7007.
NATIONAL NV830 One Audio Channel Low. Replace Q4315, 2sd655.
NATIONAL NV830 Overloading On E-e. Change Bn5115b I.F. Chip.
NATIONAL NV830 See Nv370  
NATIONAL NV830 Will Not Tune Stations. Check/replace Ic7503.
NATIONAL NV850 All Displays Light Up For Approx,8secs Then Vtr Off. Suspect Load Motor And Ic Driver Ic 6003, Ba6209 In The System Control Section Of The Main Pcb
NATIONAL NV850 At Vtr On Or Power On,capstan Motor Rotates No Mech Reset Suspect Load Motor And Ic Driver Ic 6003, Ba6209 In The System Control Section Of The Main Pcb
NATIONAL NV850 Blank Screen In E-e Tuner Mode,audio,ok. Cassette Play Ok. Check For Faulty Tr703, 2sd636, In Demodulator Unit
NATIONAL NV850 Int Capstan Stops Or Vaires Pressure Roller Seizing
NATIONAL NV850 Int Drum Stops In Pb/rec Ic2005 An6387
NATIONAL NV850 No Go R1001 O34 Fuse Or C1101 3300µf/16v Or Ic6003 Ba6209 Loadmtr
NATIONAL NV850 No Picture In Ee Q702 2sa564
NATIONAL NV850 No Test Sig X3001 Vsx0099
NATIONAL NV850 Red Vtr Indicator On All Times Clock On But Can't Be Set Check For Open Circuit R1001 In The Power Section Of The Main Pcb.
NATIONAL NV850 See Nv370  
NATIONAL NV850 Sound On Hifi Ok? Normal Varies Ic2004 An3822- Use An3821 As Replacement
NATIONAL NV850 Unable To Tune Stations Check Ic7505 If Unable To Change Tuning Of Station, Else Replace Ic7503.
NATIONAL NV8600 Flashing On Screen With Varying Brightness In E.E. And Rec. Check The Record/playback Switches If Ok Look For D/j's In The R.F/i.F. Stages (monitor Tp301 On Luminance Panel.)
NATIONAL NV8600 Goes Abnormally Fast In Play. Check 2sa699 S/c Also Capstan Motor Should Draw (30 Ma Off Load 80-120 Ma On Load). Any More Than This Means Capsatn Motor Faulty.
NATIONAL NV8600 Playback Of Pre-recorded Tapes Ok Not Rec Luminance Check For Faulty Q301,2sc828 On Luminance Process Pcb
NATIONAL NV8600 See Nv2000  
NATIONAL NV8600 Wont Play Or Record. Pinch Roller Wont Engage. Check Solenoid Pull In Transistor For O/c Replace With Bd 139, Also Check Damping Diode D624.
NATIONAL NV8610 Drum And Capstan Motors Running As Soon As Power Is On. Check Or Replace Loading And/or Load End Switch. (mounted On Sub Board Vjb00310 On The Deck.)
NATIONAL NV8610 See Nv2000  
NATIONAL NV870 Faulty Loading Motor Drive. Replace Ic6004, Ba6238.
NATIONAL NV870 Faulty Loading Motor Operation Ic6004 Ba6238
NATIONAL NV870 No 12v B+ On Tuner. Replace L2002, 1 Mh.
NATIONAL NV870 No 14v To M. Comm. Motor. Check F2001, Vsf0035.
NATIONAL NV870 No Go, No Display Or Jumbled Ic7501 Mn1455bvl
NATIONAL NV870 No Tuning Memory With Dim Display. Check - 28v To Memory Chip Via R7550 (27ohm).
NATIONAL NV870 Not Recording Audio On One Channel Replace C4594 And C4565, Both 47µf 6v Capacitors.
NATIONAL NV870 Vtr Turns Off 10 Sec, Wont Accept Tapes Dj On Q1503 (h/sink Rear Corner)

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