Electronics > Beginners
Beginners Road To Repair Part 2
don@cascadefellowship.org:
Hi all! So I have my second repair project ready to go. If you recall, my first repair was an active DI box that was a success due to the help I found on this forum! Here is a brief summary of what I learned from the last project (https://www.eevblog.com/forum/beginners/beginners-road-to-repair/):
I'm going to note some things here for future reference so I can build on what I learned.
My Steps For Repair:
1. Test external power supplies.
2. Visually inspect components on PCB's looking for things that are blown or burned.
3. Check input and output of voltage regulators.
4. If there's a problem on a voltage rail then check each component on that rail until you find the problem.
Things I Learned:
-Desoldering braid is really annoying. I need a faster desoldering solution.
-Electrolytic capacitors tend to go bad so check those first.
This current repair project is an Ampetronic ILD9 Induction Loop Driver that is used to broadcast audio to persons with listening assistance devices. On power up, the Compression LED’s under the Gain control goes right into overload and the Power LED blinks continuously. When operating normally, the Compression LED’s will follow the signal level passing through the unit and the Power LED will lit and not blinking.
I’ve checked the fuse (and spare) and both are functional. I’ve made a visual inspection and found no obvious signs of damage. There’s no burnt smell either. I’m going to continue by checking the voltage regulators located near the bipolar junction transistors.
If anyone would like to offer any suggestions, tips, advice or just say hi, I welcome your comments. Thank you! I hope I can get this running again.
don@cascadefellowship.org:
Additional Pics
don@cascadefellowship.org:
Additional Pics
don@cascadefellowship.org:
Additional Pics
don@cascadefellowship.org:
I've been in contact with the manufacturer and I'm going to try and get a schematic for the unit. I have not found one online yet. Maybe this will be an opportunity to create my first schematic!
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