TCK6 Repair Tips

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Make	Model Ch.	Symptom	Problem Solution
Sony	TCK670	DAMAGES TAPES - REPLACED CAPSTAN RETAINING WASHER	The unit intermitantly eats tapes. All normal fixes wereperformed with no success. Found capstan shafts/flywheel were loose andeasily pushed in and out.
Sony	TCK615S	UNIT DAMAGES TAPES, PINCH ROLLER UNSTABLE	The unit exhibits tape path problems due to an unstable pinchroller assy. The center of the shaft the pinch roller rolls on has araised bulge in the center. This bulge causes the pinch roller to wobbleor rock from side to side on the bulge during play or
Sony	TCK620	INTERMITTENT NO RECORD ON RIGHT CHANNEL - RESOLDER LPF101	The unit intermittently would not record on right channel.Standard signal tracing showed the LPF to be the problem. Furtherinspection showed the coil on pin 3 of the filter to be poorly solderedcausing the problem.
Sony	TCK650ES	FRONT PANEL DISPL INOP/BACKLIGHT OK - REPLACED DISPL/SYSCON	Front panel display was inoperative. Backlight was OK.
Sony	TCK611S	PLAY TOO FAST - REPLACED CAPSTAN MOTOR M1053	Unit plays at speed 3168 hx on test tape 3 khs, M1053 cannotbe adjusted at the back, defective M1053/variable resistor shorted insidemotor.
Sony	TCK611S	TWO SECONDS INTO PLAY UNIT SHUTS DOWN - IC1002 DEFECTIVE	Unit shuts down a few seconds into the play mode. All otherfunctions work ok. Confirmed clean switching pulse on P4 of IC701 fromIC1002. Confirmed that S1001(rotary encorder) switch was ok. ReplacedIC701. Unit still shut down. Could manually rotate t
Sony	TCK666ES	WILL NOT PLAY TAPE, PINCH ROLLER JAMMED - FREE PINCH ROLLER	Pinch roller lever jammed, keeping playback head down. Whenplay key pressed, only fast forward or rewind possible. Due to thatproblem, unit can not lift head playback up to position of play.
Sony	TCK61	RANDOM POPING NOISE HEARD WHEN IN RECORD MODE - RY301 FAULTY	A poping noise is heard in the output during the record modetap on the record/playback board and it is okay for a while but soonrepeats that noise.
Sony	TCK666ES	PULSING WHITE NOISE IN PLAYBACK	Playback of blank tape has pulsing white noise on top of tapehiss. Using Dolby C, eliminated noise also stopping take-up reeleliminated noise. Traced to pulsing noise riding on DC lines pin 9, 10and 8 of IC-004. Pin 9 B+ with noise allowed noise to ge
Sony	TCK60	AUDIO WARBLE	On both these units the lower bushing came off and allowedthe motor switch lever to ride up against the supply reel causingthe audio to have flutter in it.
Sony	TCK65	MISSING PART NUMBER FOR CHASSIS ASS'Y MECHANISM	Need part number for chassis ass'y mechanism. -HQ COMMENTS: The number is X-3564-020-0. It is available from NPC.
Sony	TCK60	IRREGULAR SPEED	Excessive W and F. Static torque tests OK, motor and servocheck OK. Rubber OK.
Sony	TCK60	PART NUMBER MISSING	When ordering tape counter for TC-K60, Service Manual showspulley attached to the counter, however when received the pulley is notwith counter.
Sony	TCK60	LOOSE BUSHINGS	Distortion on P/B with 3KC WS-48B. Speed OK but sounds likean electronic oscillation problem.
Sony	TCK60	BUSHING POST CAP WEARS OFF	A varying drag on the supply reel causes wow and flutter.
Sony	TCK65	CAPSTAN MOTOR	We found the capstan motor siezed as a result of the rearbearing coming loose. This locked position caused the motor drives tooverheat and short which in turn burnt the board.
Sony	TCK61	MISSING 2.5MM STEEL BALLS	The head deck assy will not move fully into the cassette. Inthe case of the TC-K81, the assy jammed in the cassette case, chippingthe erase head.
Sony	TCK65	DEFECTIVE MOTOR	Customer complained that intermittently, unit would lock up,no functions would work. Found that intermittently, capstan motor wouldnot start up when power was applied to the unit.
Sony	TCK65	DEFECTIVE IC802	After operating approx. 1.5 to 3 hrs, the transport willstop - rewind - stop. The LED display will then indicate 1 and none ofthe function switches have any effect. This is with RMS off, with RMS on- cannot be programmed. Found Pins 12, 13, 15, 16 of
Sony	TCK6	LOCK PLATE BINDING	Eject, F/F and Rewind defective, while Stop, Fwd, Record andPause work normally.