Servicing Toshiba CD/USB Radio Cassette Recorder
This set belonged to one my colleagues in the Hospital and was brought to me with the complaint that it became dead after a sudden surge of voltage in their house. I carried it home and checked the power plug first, as I could see that the plug was larger in size and had its ‘belly bottom’ filled up with a Fuse. The fuse was open. That seemed to be reassuring until I checked the primary of the Transformer, which was also open!
So, I opened the back cover and ensured that the transformer had blown. Removed the Transformer and gave it for rewinding. You can see the inside of the set:
Did a general cleaning without dismantling or disturbing on the Radio/CD or Cassette side. Checked the set using my desk top power supply and found it to be working very well. CD/USB /Radio and Cassette worked without any hitch.
Got back the Transformer after rewinding. It showed 8V AC, which will produce around 12V DC, and it will get regulated to 9V DC by the circuit in the power supply. The set worked super fine. Tested it for a few hours on all modes and passed the quality test.
Put back the fixing screws and delivered it back to her after demonstrating all functions. A job completed quickly and satisfactorily sans the adventurous thrills!
This article was prepared for you by Parasuraman Subramanian from India. He is 68 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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You may check on his previous repair article below: