Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
General Forum Information
Off Topic
RG50TC stuck in clean channel
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Synergy/MTS Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="bondmatt" data-source="post: 149367" data-attributes="member: 3582"><p>I've got an RG50TC that switched itself from the overdrive channel(s) to clean while playing. It seems to behave normally while in the clean channel. When I try to switch to the overdrive channel, both the overdrive and clean channel LEDs are lit but neither Gain 1/2 LED is on. There is no change in tone. Other than the LEDs, it stays in the clean channel. Tried the footswitch and the pushbutton on the front panel, both without effect.</p><p></p><p>Schematic is here:</p><p><a href="http://www.echostar.pl/~zelman/RG50TCSchemat.pdf" target="_blank">http://www.echostar.pl/~zelman/RG50TCSchemat.pdf</a></p><p></p><p>Any ideas would be very much appreciated.</p><p></p><p>I tried to test Q16 with the power off. I shorted the drain to source to eliminate any stored charge. The source to drain resistance (short removed - at no point was it shorted with power applied) is ~ 200 Ohms. Gate to drain and gate to source resistance is 1000k Ohms regardless of polarity. I'm not familiar with FETs but a quick search online seems to indicate the 1000k Ohms readings are only correct for one Ohmeter polarity. Checking Q16 is a shot in the dark after reading about a somewhat similar issue.</p></blockquote><p></p>
[QUOTE="bondmatt, post: 149367, member: 3582"] I've got an RG50TC that switched itself from the overdrive channel(s) to clean while playing. It seems to behave normally while in the clean channel. When I try to switch to the overdrive channel, both the overdrive and clean channel LEDs are lit but neither Gain 1/2 LED is on. There is no change in tone. Other than the LEDs, it stays in the clean channel. Tried the footswitch and the pushbutton on the front panel, both without effect. Schematic is here: [url]http://www.echostar.pl/~zelman/RG50TCSchemat.pdf[/url] Any ideas would be very much appreciated. I tried to test Q16 with the power off. I shorted the drain to source to eliminate any stored charge. The source to drain resistance (short removed - at no point was it shorted with power applied) is ~ 200 Ohms. Gate to drain and gate to source resistance is 1000k Ohms regardless of polarity. I'm not familiar with FETs but a quick search online seems to indicate the 1000k Ohms readings are only correct for one Ohmeter polarity. Checking Q16 is a shot in the dark after reading about a somewhat similar issue. [/QUOTE]
Verification
Post reply
General Forum Information
Off Topic
RG50TC stuck in clean channel
Top