Corroded Tracks And Bad Capacitors Found In Sharp Two In One
Make and Model: Sharp WG-293BZ(BK) Two-in-one
Complaint reported: FM Radio stopped working.
Troubleshooting and rectification done: Opened and cleaned the set thoroughly, which had a lot of cockroach eggs stuck in almost all places. Dismantled the set completely. Found corroded tracks and solder joints. As capacitors were found leaked, replaced all the electrolytic capacitors on the board. Retouched all the solder joints. Found the soldering turned grey in some places and these looked like detached from the PCB! As the track of the FM input had got cut at two places, joined a jumper wire in its place. Cleaned and lubricated all the switches and connectors.
Powered it up in dismantled condition and found the set to be working very well in all bands. As the party did not want the tape recorder to be rectified, I left the mechanism part as it was. Refit the PCBs back in its case. Ran the set for several hours as a part of ageing test. Found it to be working very well all the time. Fixed a broken leg of the screw. Closed the set and kept it ready for pick up by customer. Mission accomplished, adding satisfaction to the collections!
HERE ARE A FEW PICTURES:
This article was prepared for you by Parasuraman Subramanian from India. He is 70 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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