Comments on: BT2025 IC (TEA2025 IC) Shorted To Ground https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Tue, 02 Aug 2022 17:48:27 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: naresh.p.tarachandani https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-390730 Tue, 02 Aug 2022 17:48:27 +0000 https://jestineyong.com/?p=17760#comment-390730 In reply to Albert van Bemmelen.

sir,can I use TEA2025 ic instead of Bh2025bh boomtech ic
naresh
bhavnagar

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]]> By: Humberto https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342695 Tue, 25 Sep 2018 16:18:29 +0000 https://jestineyong.com/?p=17760#comment-342695 Hi Yogesh, you performed a professional troubleshooting.

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]]> By: Albert van Bemmelen https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342557 Mon, 24 Sep 2018 04:48:30 +0000 https://jestineyong.com/?p=17760#comment-342557 In reply to Yogesh Panchal.

Understood Yogesh. The solderside of the board you showed had on the right a dangerous marking sign with this safety '!' marking in it and both sides of this board are distinctly separated from each other which is marked by the vertical white line in the right board middle like is the case in smps 110VAC/230VAC to DC supplies.
I guess that if it is a YH-1117 which is a smd voltage regulator the following number gives you the voltages it puts out regulated. But if it is a standard LM111 it likely will be a voltage comparator?: http://www.ti.com/lit/ds/symlink/lm111-n.pdf
To be sure of this you could test this IC in a tester/test circuit or replace the chip with a LM111?

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]]> By: R Murali https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342530 Sun, 23 Sep 2018 16:11:42 +0000 https://jestineyong.com/?p=17760#comment-342530 Great effort in finding the root cause . Thank you for sharing.

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]]> By: Yogesh Panchal https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342498 Sun, 23 Sep 2018 08:27:16 +0000 https://jestineyong.com/?p=17760#comment-342498 In reply to Albert van Bemmelen.

Albert,
Generally in this type of speakers manufacturers are using external power adapter or a step down transformer inside the box.in this circuit this transformer is used for DC to DC converting because already i am getting 18v Dc on primary side capacitor and the same on secondary side capacitor. do you have any idea about that 8 pin IC marked with YH-111? because i have finished this job in hurry because customer need it very urgent.

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]]> By: Yogesh Panchal https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342496 Sun, 23 Sep 2018 08:02:07 +0000 https://jestineyong.com/?p=17760#comment-342496 In reply to Parasuraman S.

Thank you Sir,

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]]> By: Albert van Bemmelen https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342422 Sat, 22 Sep 2018 04:23:55 +0000 https://jestineyong.com/?p=17760#comment-342422 Good job Yogesh. You said "no transformer inside" but there was one safety smps transformer visible on the second photo? No transformer would have been dangerous when touching the audio wires.

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]]> By: Parasuraman S https://jestineyong.com/bt2025-ic-tea2025-ic-shorted-to-ground/comment-page-1/#comment-342404 Fri, 21 Sep 2018 23:22:40 +0000 https://jestineyong.com/?p=17760#comment-342404 Excellent trouble shooting without leaving! That's what is required in Technicians! You are a marvel and would do anything to set right things!

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