I posted this in another forum but was suggested to post here. I have a 2235 with no sound. Pre amp/main in are fine. All switches and controls seem to be fine. No relay click on power up. I took a reading of the 4 output transistors and found the uploaded measurements. Do you think I would be fine in just replacing the 4 transistors or any suggestions on other areas to check. Thanks much.
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Hi Joe. Welcome to AK!
Before you reinstall output transistors you should build a Dim Bulb Tester. It’s a simple device that makes the AC current going to your receiver pass through a 75 or 100 watt incandescent light bulb. If something is shorted, or say if the output transistors were backwards, the lamp will light up rather than the fuse or some component toasting. Like your brand new output transistors. New output transistors can usually be safely installed when a DBT is used.
Google “dim bulb tester” for how to make one. There are as many ways to put one together as there are people making them. You may have some or all of the parts needed already if you have electrical pieces like an outlet, an outlet, and something to put the light bulb in.
-Randy
Before you reinstall output transistors you should build a Dim Bulb Tester. It’s a simple device that makes the AC current going to your receiver pass through a 75 or 100 watt incandescent light bulb. If something is shorted, or say if the output transistors were backwards, the lamp will light up rather than the fuse or some component toasting. Like your brand new output transistors. New output transistors can usually be safely installed when a DBT is used.
Google “dim bulb tester” for how to make one. There are as many ways to put one together as there are people making them. You may have some or all of the parts needed already if you have electrical pieces like an outlet, an outlet, and something to put the light bulb in.
-Randy
Steven Tate
CEO Flat Forehead Soc.
After building a DBT, a pretty good first test is to unplug one amp board at a time and see if you get relay click and sound out of the other side. In the 2325, there is a white molex connector that makes the board easy to disconnect. If your problem is an amp board or output transistors, this should point to the bad side.