Question about Fender ® Frontman 10G Electric Guitar Amplifier

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Hi. Fender Frontman amp suddenly stopped working (would not turn back on). Have checked cable fuse and all is okay there. Power light is not on and amp appears to be completely dead. NU

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This is a very simple unit: a power source of an linear design, a preamplifier with tone and distort control and an 10 watt integrated amplifier.
If the unit is completely dead then the fault is in the power section: cable, switch or source. To find out which you must check them all with a simple multimeter: cable and switch with an ohmmeter (the resistance should be 0 if good) and the source with a voltmeter - (check the presence of the 2 voltages (25 and 15 volt) at its outputs.
Here you can find the schematic of a very similar one
http://www.schematicx.com/view-schematic/fender-frontman-15g-15r-guitar-amplifier-schematic/
The only difference is the final amplifier chip.

Posted on May 28, 2011

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Fuse power amp is good I have power on power supply but the amp does not turn on what meaning is this?


Probably a bad transformer? Do you have power on the secondary side? Power in is one thing power out is another, hope this helps?

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I left my fender frontman 65r on for over a year and yesterday a gentle hum for a few seconds then a loud hum for a few seconds more then no more power to the unit. I opened it and troubleshooted it around...


Why was it on for over a year :D Has anyone replaced the fuse? In the service manual I found it has to be only 2 Amps! Okay let's solve the problem. The power transformer was overloaded which caused the broken winding. It is still overloaded what can be heard by the hum sound. First thought was to check main capacitors or better just replace them! If the hum gets louder, they might also become warm. Check voltages after bridge rectifier and smoothing circuit. They should be +/-42 V (TP3, TP4) and +/- 16 V (TP5, TP6) Let me know which of them is faulty Cheers

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1 Answer

Play mac through Fender Frontman amp


Simple: connect the headphones out (3.5mm jack) to the input jack of your fender (6.3 jack). By doing this you will loose one channel so you better generate a mono signal inside your computer before. Electrically this is no problem, nothing will be damaged. Turn the gain and volume knobs down and apply a signal from your Mac. Gently increase gain and volume. Et voila wonderful mono sound through a guitar amp

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Hello, amplifier suddenly stops playing.The loudspeaker is very hot. I do not see the fuse.The control light is on, but the amp does not play.Please help me.This is the amp: Fender Frontman 65R. ...


There is something a bit more serious than the fuse. I would start by checking that the speaker itself is the correct type. This should be a 8 ohm speaker. Then I would play it and see if the output transformer is hot. This may be over driving the speaker. I would also look at the main power transformer. You might have one with the export transformer which can work with 110 or 220. I have no idea of your location so no idea which is your local level. Something is either over volt or over amps. Most of this amp runs at 15 volts and digital runs very cold compared to a tube amp.

I looked over the schematic and I just can't see anything else that would do that other than the things I have mentioned. A hot speaker is "very"unusual. If you can check the voltages with a meter this should be easy to point out the cause. It shouldn't take much for a amp tech to sort it out if you have to take it in. I wouldn't run it that much until fixed. When you see abnormal heat then something is being stressed. So you can cause more damage by using it. There may be a problem with the power transformer or votlage regulator stage but since the speaker is heating that could end up needing replacement if run too long.

Without having it in front of me I would sayy you may be looking at a new power transformer.or diodes and possibly caps. Any of those could cause the base issue. This is different enough with the hot speaker than I'm not that sure without seeing it.

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Will a MP3/iPod/CD player play through a Fender Frontman 65 or 212 "Power In" input jack?


The power amp input jack takes "line level" input BUT is monaural (single channel). The output of an ipod is Stereo. Hence you would have to "mix" the two channels before connecting to the Fender. Mixing does NOT mean just tying the two channels together. A minimu thing would be a passive resistive mixer consisting of a resistor from each of the IPOD channels to the common point going to the input of the Fender. Remember if you plug into the Fender power amp input you DISCONNECT the preamp and other circuits and would ONLY hear the IPOD input.

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