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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You may check on his previous repair article below:
https://jestineyong.com/servicing-mercury-smps-kob-ap4400xa/
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Albert van Bemmelen
March 7, 2019 at 11:12 pm
I can't answer your Germanium surprise question concerning the PEAK Atlas tester either Parasuraman. And I would gladly repeat that transistor test for you if I had one with my PEAK tester. But I can add a similar problem with the RT809H and TL866 universal programmers. The RT809H refused to good verify a Bios sop8 CFEON EN25Q32 chip that the TL866 had no problem with.
And the RT809H had no problem with a ZB25VQ32 sop8 Bios chip that the TL866 could not recognise at all. I think we still need many test devices and tools to rule out bugs and human error! Sadly the ifixit.cn site that has a forum on the RT809H seems blocked with harsh security questions for any comments from China outsiders.
Parasuraman S
March 7, 2019 at 11:40 pm
Subsequent to writing this article, yet another H-out transistor showed the same thing! I think it's a bug in the software and one should write to the manufacturer!
brian
March 16, 2019 at 12:54 pm
I seem to recall having a problem testing the HOT's with my Sencore transistor tester...and that unit costs $500.
Robert Calk Jr.
March 8, 2019 at 1:17 pm
I use the DCA75 Pro and you can update it. I don't have any experience with the tester that you have. Maybe it needs to be updated? The only time my tester acts funny is sometimes when it is checking a bad component.
beh
March 8, 2019 at 10:14 am
PARASURAMAN
We have to ask from ATLAS COMPANY to answer to this question why this machine has made such mistake! and they must answer, unless other wise this would be a very bad propaganda against this company
brilan
March 16, 2019 at 12:57 pm
I think I eve had problems with my Sencore test and it costs $500 I think il called sencore but don't remember what they told me, they used to have a free no.you could call and speak to an engineer.
Robert Calk Jr.
March 8, 2019 at 1:31 pm
Thanks Parasuraman. Good job!
Humberto
March 9, 2019 at 3:00 am
Good repair Parasuraman. Keep on
beh
March 9, 2019 at 10:15 am
PARASURAMAN
I sent your article to technical department of ATLAS company and asked them about the error of the meter that occurred .If i receive any answer i will let know.
beh
Parasuraman S
March 12, 2019 at 12:23 pm
That was very nice of you!
Parasuraman S
March 10, 2019 at 9:55 pm
That was very nice of you!
moniem
March 13, 2019 at 6:08 pm
good job