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Sony TC-630D

Stereo Tape Deck (1971)

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Sony TC-630D


Track system: 4-track, 2-channel, stereo/monaural system

Heads: 1 x record, 1 x playback, 1 x erase

Reel size: up to 7 inch reel

Tape speeds: 1 78  3 34  7 12 ips

Wow and flutter: 0.09% (7 12 ips)

Frequency response: 20Hz to 22kHz (7 12 ips)

Signal to Noise Ratio: 52dB

Total harmonic distortion: 1.2%

Input: 60mV (line), 0.19mV (mic)

Dimensions: 408 x 199 x 480mm

Weight: 11.3kg


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re: TC-630D

The reason it stops after a few turns is due the auto stop spring. You must have a tape threaded in the machine or raise the auto shut off spring. the spring is located on the left side of where the tape is threaded under the cover. If you raise the spring without a tape being threaded it will continue to power the motor and turn the reels.

re: TC-630D

I bought my Sony TC-630 in 1974 and still have it.
But haven't used it for about 20 years. Just pulled
it out of storage in its original box and powered
it up. Some tape transport issues. Bad motor cap.
Bought a new motor capacitor on Amazon (450V
1.5uF polypropylene) and got the speed
up to par but still have some tape transport issues.
The tape keeps getting spit off the pinch roller.
I have the owners manual but no maintenance manual.
Just downloaded the latter and I see it has all
the info I need to fix the problem without screwing
something up mechanically. Thanks Frank5546!

re: TC-630D


I just picked up one of these at a garage sale. Unfortunately there are a few problems with it:
1. first, it did not seem to play, as if it is stuck in fast forward.

2. Now, after running it through it's paces, I turn the knob to play, then it moves for a few turns and then stops dead.

Before I open up this unit, without having any previous experience, is there someone out there who could guide me as to the best approach and possible solutions to this situation?

Thanks in advance,


RD Electronics's picture

re: TC-630D

Hi Will,
What I normally do on these tape players is that I clean all the rubber parts with alcohol especially the capstan pressure roller which determines the speed of the tape. Try this one first and let me know if it helped.

re: TC-630D

I just picked up one and it is doing the same thing, so I need a manual to see if I can fix it if you find the problem before me please let me know

re: TC-630D

Hi Grandpa. I got one a few weeks ago and it's doing the same thing. Any ideas on how to fix it.

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