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Sony TC-K750ES

Stereo Cassette Deck (1991)

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Sony TC-K750ES

Specifications

Type: 3-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.8 cm/s

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

Tape Type: type I, CrO2, Metal

Noise Reduction: B, C, HX Pro

Frequency Response: 20Hz to 21kHz  (Metal tape)

Signal to Noise Ratio: 75dB  (dolby C)

Wow and Flutter: 0.07%

Total Harmonic Distortion: 1.0%

Input: 77.5mV (line)

Output: 0.44V (line)

Dimensions: 430 x 135 x 350mm

Weight: 6.9kg

Accessories: optional remote control

Year: 1990

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Comments

re: TC-K750ES

Just purchased the Sony TC-K750ES cassette deck. Noticed the left pinch roller & shaft is missing. Pinch roller holder is still fitted.
Not sure why roller & shaft is missing?
Does anyone know where I can purchase a shaft (looks about 2mm dia). Or what I can use as a substitute?

re: TC-K750ES

Hi,

I would bet it was removed because they couldn't solve the problem of tape creasing and eating. Sony had problems with some of their dual capstan models of this era.

If the capstans are not running at the exact same speed, the pinch roller pressure is correct and the tape path is clean and perfectly aligned the tape can get skewed and become creased and "eaten". The cheap fix was to just remove the left pinch roller, but that negated the advantages of the dual capstan system.

Sorry, I don't know if you can still obtain the pinch roller and shaft. The part number for the whole assembly is X-3356-621-1. However the part number may have changed (Sony liked to do that alot!) If you are able to source the pinch roller and shaft, make sure that you use a new capstan belt. I found that decreasing the supply side pinch roller pressure helped a lot. If you can find a mirror cassette it is handy for verifying tape alignment. The service manual here has a good description of checking and adjusting the tape path alignment. Then run a bunch of tapes through it that you don't value to make sure that the problem is not there.

-bob

re: TC-K750ES

What size and thickness has the drive belt for FF/rew?
(probably between 20MM and 25MM inner diameter)

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