Vintage Audio
this section covers some restoration work that I did on my vintage HI-FI gear
Article #1 | 10:33 PM Tuesday 16/02/2022

SONY TC-K890ES: Introduction

Somehow I acquired yet another Sony cassette deck. There is nothing much to do initially but I will detail all service operations in the following articles.


The following articles are not to be treated as do-it-yourself tutorials on how to fix, restore, rebuild, or improve the unit in cause. This was not my initial intention. But you can consider this whole content as a general guideline, should you decide to launch into such an adventure.

The entire documentation is just a reflection of my work and I cannot be held responsible if you damage your unit, or even harm yourself in the process.

Article #2 | 10:45 PM Tuesday 16/02/2022

SONY TC-K890ES: Technical Data

This cassette deck has the following technical characteristics.

Track System4 track 2 channel stereo system
Tape Transport MechanismTCM-200D10
Tape Speed4.8 cm/sec
Wow and Flutter<0.024% WRMS
<0.065% (DIN 45500)
Frequency Response20 Hz - 17,000 Hz (±3dB) - Fe2O3 tape
20 Hz - 20,000 Hz (±3dB) - CrO2 tape
20 Hz - 22,000 Hz (±3dB) - Metal tape
Distortion<1.3% (1,000 Hz / 0 VU) - Metal tape
Signal to Noise Ratio57 dB - Fe2O3 tape
59 dB - CrO2 tape
61dB - Metal tape
Heads1 x LaserAmorphous record head
1 x LaserAmorphous playback head
1 x Sendust & Ferrite erase head
Motors1 x direct-drive linear torque BSL motor for capstan drive
1 x DC motor for reel drive
1 x DC motor for mechanism operation
Power Voltage220 V, 240 V at 50/60 Hz
Power Consumption23 W
Dimensions / Weight135 mm (H), 470 mm (W), 350 mm (D) / 8.1 kg

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Please note that all the work presented herein this site is non-commercial. This is my hobby and I am doing this in my spare time. Through this page I freely share my knowledge with you. But if you like my work, please consider helping me buy a transistor or a capacitor for my projects.

Thank you!

Copyright © 1998- Alexandru Groza