| GRUNDIG | 2 X 4 SUPER | After An Hour On Play The Sound Goes Slow. Own Recordings | Check Tape If Running Too Fast In Record; Possible Maladjustment Of Control Apb On Servo Panel. Adjust On Record For A Sampling Pulse On Every Fourth Ramp On T.P. Sm2 Adjust No More Than 10 Degrees. Check T1546, T1548, T1551, T1563 With Freeze Spray In F |
| GRUNDIG | 2 X 4 SUPER | Chewing Tapes In Rec. And Play. F.F./rew. Ok. | Check If 4v On Drive Transistor Should Be 12v Possible Zener Diode D/j In P.S. Check Also R443 (390ohm) R453 And R485. |
| GRUNDIG | 2 X 4 SUPER | Drum Servo Wont Lock In; Intermittently Slows Down. | Check For 32khz Ripple Across C447 If So C446, C447, C451. Should Be Changed Preferably With Manufactures Originals. (high Current) |
| GRUNDIG | 2 X 4 SUPER | Grainy Picture From Its Own Recordings. | Check I.F. Preamp Tr2302 (bf324) Located In The I.F. Can. |
| GRUNDIG | 2 X 4 SUPER | Int No Braking Or Poor Braking. | Check Int Relays Contacts Which Supply 12v+ At Pin 18 Of P/s. |
| GRUNDIG | 2 X 4 SUPER | Int No Record, Play Mode Ok. | Check Record Safety Switch Under The Deck Front Left. |
| GRUNDIG | 2 X 4 SUPER | Int Refusal To Go Into Play Mode F.F. And Rew Ok. | Check Autostop Adjustment For Misalignment |
| GRUNDIG | 2 X 4 SUPER | Machine Plays Back When Stop Is Selec. On Remote. Ejects. | Change Micr I.C. |
| GRUNDIG | 2 X 4 SUPER | Neg. Pic. On E.E, Playback For 10 Min. Then Normal. R | Check -22v To Modulator Low Because R477 27 K Ohm Gone High. |
| GRUNDIG | 2 X 4 SUPER | No Channel Selection | Check R435 O/c In P.S. |
| GRUNDIG | 2 X 4 SUPER | No E.E Audio. | Check/replace Tba120t On The I.F. Panel. |
| GRUNDIG | 2 X 4 SUPER | No Functions After Stopping In Play Mode. | Check/replace Ic220. Must Replace With Original Part Sda2010 E316, Not What The Manual Says. Change Ic2640 (sm591) Along With 5 V Reg. |
| GRUNDIG | 2 X 4 SUPER | No Functions, Wont Accept Tapes. | Check Relay Not Holding C446 (470 Mfd) O/c. |
| GRUNDIG | 2 X 4 SUPER | No Modulator Output. | Check For -22v Supplied To D127 (zenner) If Not R25 (2.2k) O/c. |
| GRUNDIG | 2 X 4 SUPER | Playback Colour Goes To Monochrome; Colour Dist. 20 Min. | Check Pin 11 Of Ic610 In The Faulty Condition, If Less Than Iv Colour Killer Is In Operation. Check/replace The Two Crystals, Ic610, Ic509 With Freezer. If Above Iv In Faulty Condition Look In Signal Circuits T 649 And Onwards. |
| GRUNDIG | 2 X 4 SUPER | Popping Noise In Sound Monitor With Noisy Picture. | Check Under The Head Cover For Jammed Red D.T.T. Wires S/c To Chassis. |
| GRUNDIG | 2 X 4 SUPER | Power Supply Chopper Circuit Dead. | Replace C401 If Tda4600 (i.C.) Or Bu208a Goes Faulty. |
| GRUNDIG | 2 X 4 SUPER | Snowy Picture On Play (not Heads) | Check For -22v At Pin 6 Of The Modulator Connector. The -22 Comes From Pin 22 Of The P.S. If Missing Look For Craked Cct Board At Rear Of Mother Board (near Cabinet Mounting). |
| GRUNDIG | 2 X 4 SUPER | Tape Counter Gives Wrong Readings | Check Optocouplers On The Reel Motors Also C228/c229 2.2 Mfd On The K.B.D. Module, If Not Change Clock Chip. |
| GRUNDIG | 2 X 4 SUPER | The Display Dosent Change When Press Prog/day Or Start/stop | Check Continuity Of Key Switches And Lines To Micr. I.C. (conductive Paint On "bubble Pack" Keyboard Goes O/c. |
| GRUNDIG | 2 X 4 SUPER | Will Not Switch On Clock Displays 8's | Check R443 O/c In Base Cct Of T443 |
| GRUNDIG | VS180 | Int. Or No Play With Pause Light Flashing. | Look For Dirty Contacts On The Brake Solenoid Switch (s4). |
| GRUNDIG | VS180 | Loads Up Then Unlaces With Both Spools Running Fast. | Check/replace M722 Interfacing Chip. |
| GRUNDIG | VS180 | Mach. Would Inter. Rewind/f.F Slowly. Clock Part. Operatin. | Check/replace Faulty On/off Switch (int. Leaky) |
| GRUNDIG | VS180 | Reel Motors Dont Stop When Given Command. Brakes Squeal. | Check C301 And/ Or C305 For Leakage (around 10 Meg) Suspect If Round Black Disc. Variety. |
| GRUNDIG | VS180 | When In Play Mode Picture Would Int Jump For Several Secon. | Check Back Tension Arm If Locking To The Optosensor. |
| GRUNDIG | VS200 | If "7" Is Displayed In Rewind With Tape Damage. | Check Take Up Motor Has Tight Bearings (especially When Hot) |
| GRUNDIG | VS200 | No E.E. Picture , Prerecorded Tape Plays Ok. | Check If Video Is Present At Pin 4 Of Ic810 (tda3771) |
| GRUNDIG | VS200 | No Operation. | Check Machine First By Reseting |
| GRUNDIG | VS200 | Poor Reverse Searching With Tracking Bars At Top Of Screen. | Check Tape Up Motors Coded Before April '84 For Tight Bearings, Also Unsecured Tape Exit Guide, Bent Tape Tension Arm. Tension Should Be 23/25 Gm/cm. |
| GRUNDIG | VS200 | Snowy Picture. | Faulty Rf Amplifier. |
| GRUNDIG | VS200 | Spots On Screen In Play Mode. | Suspect Grease On Motor Wiper Contacts. |
| GRUNDIG | VS200 | When In Play Mode Unit Int Stops And Unthreads. | Check/replace Pinch Roller Bearings. |
| GRUNDIG | VS220 | Intermittent Or No Play With F1 Flashing In The Display Wi. | Look For Dirty Contacts On The Brake Solenoid Switch (s4). |
| GRUNDIG | VS220 | When In Play Mode 3 White Lines, Displayed Bot. Half Pic. | Clean Brushes Of Drum Motor. |
| GRUNDIG | VS300 | Drum Motor Goes In Reverse. | Possible Causes Are; Siezed Capstan Motor, O/c Drum Motor Winding, Input Data Interface I.C. |
| GRUNDIG | VS310 | Int Chewing Tapes | Check If The Gold Guide Spring On The Audio Head Is Broken. |
| GRUNDIG | VS380 | Int Operation Of The F.M. Audio Record Level. | Look For Bad Solder Connection To T2049. |
| GRUNDIG | VS380 | Int Sound Erasure | Look For Cracked Solder Joints In Erase Ocs Cct. (coils). |
| GRUNDIG | VS380 | Low Audio From Left Hand Channel. | Faulty Input I.C. Due To Connections Being Made To V.C.R. While It Is Switched On. |
| GRUNDIG | VS380 | No Clock Display. | Check Ni-cad Battery Is Not S/c. Also 32khz Crystal And Ic2080. Resetting The Ram Will Be Required. |