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PEAK ATLAS Showed Silicon H-Out Transistor As Germanium In Panasonic CTV
This CRT TV was brought to me in dead condition. After opening and cleaning up the TV thoroughly, removed its board, after discharging the residue high voltage in the anode of the CRT. Also discharged the high voltage from the Tank Capacitor of SMPS. Voltages were not present, but this is a must when we handle high voltage boards.
Checked for any dry solder or burnt components or blown out fuse etc. in the SMPS and did not find any. Since the Horizontal output Transistor (C6073) showed short, removed it. Checked the Fly Back Transformer using Ring Tester and found it to be defective. So removed it too. Obtained replacements of FBT and H-out Transistor. You can just see the difference in Ring Test on both old and new FBT and funny showing by Peak Atlas of the new Transistor that I bought. I cannot understand why was the Peak Atlas showing Germanium Transistor even though it was Silicon. Is it because of the protective diode and resistor inside? Well, I have no idea! I have never seen such reading by Peak Atlas in any other transistors of similar type in the past! I even checked a few other transistors in my stock!
I replaced the FBT and transistor, fit the board back on the TV, and powered it on, expecting an explosion!
But nothing happened, it worked very well!
Work accomplished in a whizz, and automatically jumped into my satisfaction bag!
This article was prepared for you by Parasuraman Subramanian from India. He is 69 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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