Ampeg SVT CL Repair - Part 1

In this video we will walk through an initial evaluation of an Ampeg SVT CL that is having issues with going into "Protection Mode." We will investigate ways to check the tubes to ensure that they are arranged correctly for the bias circuit in these amps, as well as methods for checking the grid stopper resistors and screen resistors without pulling the chassis. After pulling the chassis (see related video) we will then find a potential cause for the issues that are being seen by the customer. 00:00:00 Intro 00:03:23 Tube Arrangements and Testing Explained 00:05:48 Discharging Voltage 00:08:16 Grid Stopper Resistor Test Explained 00:09:04 Grid Stopper Resistor Test 00:09:38 Screen Resistor Test 00:10:26 Setting up the Tube Tests 00:11:20 Testing Current on the First Tube Set 00:11:55 All Tubes Measured 00:13:59 Let's Just Do It 00:14:32 Removing the Main Board 00:15:38 CAP ATTACK 00:18:06 Last Thoughts 📌 SUPPORT THE BENCH: If this repair or the schematics saved you time, consider supporting future teardowns! 👉 Get the full parts list & diagrams for repair projects over on my blog: https://technology-enterprises.com/be... 👉 Consider throwing a few bucks in the tip jar: buymeacoffee.com/technologyenterprises 👉 Join as a YouTube Channel Member right here for early access to upcoming videos or to get your name featured in the credits! #amprepair #GuitarAmp #GuitarAmplifier