Vintage SONY Transistor Radio's
Repair and Refurbishment

I am repairing a TR620(78015). The primary side of the driver transformer "423-02" was broken. I am rewinding it.

2024.07.28

TR620 SER:78015
Repair completed.
Replaced parts: R1(10k), R2(100k), R3(15k), R16(220), R17(7.5k), R13(27k), R14(10k), R12(VR 5K), C19(10μF), C21(30μF), D1(1N60). Rewound: T1. and secondary side of bar antenna.

SONY 　TRー610　 1958　

SONY 　TRー63　 1957　

SONY 　TRー620
1960