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Sony PS-FL77

2-Speed Fully Auto Front Loading Turntable (1983-1985)

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Sony PS-FL77


The PS-FL77 is a 2-speed, fully automatic, front loading turntable featuring a biotracer/linear tracking tonearm system.

The linear tracking tonearm is designed to duplicate the movement of the head which cuts the record master.

Compared with a pivoted arm, a linear tracking arm has a very small tracking error (which means greatly reduced harmonic distortion) and almost no pressure on the inside wall of the groove (which means improved tracking ability and channel separation).

The horizontal and vertical movement of the tonearm on the PS-FL77 is monitored by the Biotracer's own sensors, and this information is transmitted to the tonearm by the tonearm's own linear motors to suppress resonance at low frequencies and to obtain the maximum signal to noise ratio.


Platter: 290mm aluminium alloy diecast

Motor: linear torque brushless and slotless motor

Drive system: direct drive

Control system: FG servo control

Speeds: 33 and 45rpm

Wow and flutter: 0.035% WRMS

Signal to noise ratio: 75dB

Automatic system: lead in, return, reject, repeat, record size selection

Tonearm: electronic linear tracking

Pivot to stylus length: 100mm

Overall arm length: 170mm

Tracking force adjustment: 1.25g (+-0.25g)

Cartridge: XL-250G plug-in type 6g

Replacement stylus: Sony ND-250G


instruction/owners manual  English - sindoo

service manual  English

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Sony PS-FL77 owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are provided under strict licence. Reproduction without prior permission or for financial gain is strictly prohibited. This website is not affiliated with or sponsored by Sony.