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Post subject: Frontman 65R Volume problem
Posted: Tue Jan 17, 2017 11:00 am
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Joined: Sat Jan 14, 2017 5:19 pm
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My Frontman 65R amp has a volume issue where, after warmup of 30 - 40 minutes, the volume drops down lower. After that, it may increase and decrease again intermittently. It could be a bad solder joint, I suppose. I may be able to target the possible faulty component as well, but do not have a component list for the amp. I do have a schematic however. Has anyone ever seen this issue, or could direct me to a possible bad component and a component list for the amp? Thanks.


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Post subject: Re: Frontman 65R Volume problem
Posted: Thu Jan 19, 2017 2:34 am
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Joined: Fri Feb 05, 2010 4:31 am
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Location: Province de Québec, Canada
Check if the input jacks are intermittent . Move guitar plug on it , check solder.
Look at the power supply section for any burn resistor or burn solder.
Look a bad connection not a bad component.

Not easy to work on this amp.

Shematic for forum experts;

http://bmamps.com/Schematics/fender/Fro ... ematic.pdf


Last edited by stratele52 on Fri Jan 20, 2017 7:18 am, edited 1 time in total.

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Post subject: Re: Frontman 65R Volume problem
Posted: Thu Jan 19, 2017 7:39 am
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stratele52 wrote:
Look a bad connection not a bad component.


+1

One or more marginal solder joints is the likely culprit.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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