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Akai GX-F51

Two Head Stereo Cassette Deck (1982-83)

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Akai GX-F51


Type: 2-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.76 cm/s

Heads: 1 x record/playback, 1 x erase

Motor: 1 x reel, 1 x capstan

Tape Type: type I, Cr02, Metal

Noise Reduction: B, C

Frequency Response: 20Hz to 19kHz  (Metal tape)

Signal to Noise Ratio: 75dB  (dolby C)

Wow and Flutter: 0.035%

Total Harmonic Distortion: 0.8%

Input: 70mV (line), 0.25mV (mic)

Output: 0.41V (line)

Dimensions: 440 x 100 x 345mm

Weight: 6.1kg


service manual (pt 1)  English -

service manual (pt 2)  English -

service manual (pt 3)  English -

service manual (pt 4)  English -

service manual (pt 5)  English -

service manual (pt 6)  English -

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re: GX-F51

The Akai GX-51 is a high end cassette deck and worth of rehabilitation.
A couple of observations that may be useful if you want to restore one or a similar unit.
I plugged the one I just purchased at a yardsale in and turned it on, only to hear a "snap" sound. Should have known better. Electrolytic capacitors that have not been energized for an extended period of time need to be brought up to working voltage slowly. Replaced the effected two diodes and the power supply elco cap. This restored the electronics. Next: pushed the "eject" button, but no luck. You can manually operate the eject by turning the cam motor with no power applied to the unit (otherwise the motor engages and you will not be able to turn it far enough to open the door). The tape lid lifts of upwards, when the tape lid is open. After removing the power button bulb and six screws, removed the front. Suprise: With the front removed the eject worked. Replaced it, and again: no luck. As it came out, one or more of the operating buttons on the far right, which relies on a plastic return spring, remained engaged, which screwed up the operating logic. Next need to find out which button is the culprit and correct. (add a spring or shave of a smidgen)
Next removed the back plate, which is held with 2 clips on top. Cleaned the capstan with metal polish and the roller with rubbing alcohol. The take up and return slipped, so cleaned the roller and wheels with rubbing alcohol, which solved the issue.
Hope this helps in your restoration.
Paul AF7HT

This website is not affiliated with or sponsored by Akai. To purchase GX-F51 spares or accessories, please contact the company via their website or visit an authorised retailer.