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De-soldering, removing and replacing components on a faulty MERG DTC8a DCC train detector kit.
De-soldering, removing and replacing components on a PCB to repair an early-batch MERG DTC8a DCC train detector with the low sensitivity fault.
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The first run of the MERG DTC8a kit had a fault in the board markings resulted in low sensitivity when built as described. The fix is to turn the transistors around, but doing so if you've already built the kit is quite a challenge.
Table of Contents:
00:00 - The Problem
00:29 - Desoldering using a Solder Sucker
01:18 - Removing Components for Re-use
02:09 - Problems with Component Removal
02:36 - Sacrificing the old components to preserve the board
03:17 - Installing new components
03:56 - DTC8 History Lesson
05:57 - PCBWay Rapid Prototyping
06:57 - Possible Explanation?
07:29 - Fixing another mistake
08:07 - Testing sensitivity
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