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What can cause the DC voltage at the output of an audio amplifier?
I have a Fender amplifier 2244, and while I was doing routine dusting, one of the channels went out. When measured out, there 1.3VDC in the speaker output on that channel. I think this can be a particular problem, but I can not understand, even with the schemes and the control of the Board with a scope. 1.3V is present without a speaker connected. I have an audio signal under way, which I have traced throughout the amplifier, and signal changes or somewhere on the board of the driver, or the Board of transistors. With everything connected internally, the output transistor Board for Channel 1 is good, but the Board giving second transistor is ~ 1.3V. I think the board is a transistor push-pull amplifier.
It could be a lot of things. One thing to try is to check for a burned out transistor. If this occurs, one or more fuses or circuit in the amplifier is going to fly too. So first check for blown fuses (you can do this by visual inspection or verification of continuity with an ohm meter), or try resetting circuit breakers. And if the fuses or breakers are okay, then it probably is not a blown output device. If one or more of them are open, check the cables to the output devices (which mounts the aluminum heat sink) with a diode tester, or continuity tester. If you are short-circuited (0 ohms in the case of a continuity tester and 0 V in the case that the diode correction) in both directions (by swapping the test probes around when measuring through two terminals), then the device is blown and needs replacement. If the plug or socket joints are going to, you can try reseating they.
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Sony XM604M Marine 4/3 Channel Amplifier $139.95 Sony’s worldwide reputation for creating unique, attractive, high-quality, advanced technology products rests on a long line of innovations embraced by people from all walks of life. With a diverse product lineup serving a variety of lifestyles and industries, Sony continuously strives to introduce new products and technologies to meet changing market needs.PRODUCT FEATURES:600W max power;Conforma… |
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ASUS P5BV-C Server Board Intel – Enhanced SpeedStep Technology – Socket T – 1333 MHz, 1066 MHz, 800 MHz FSB – 8 GB – DDR2 SDRAM – ATX $152.99 ASUS new P5BV-C Server Board supports the 45nm Multi-Core Intel Xeon processor at FSB1333MHz based on the Intel 3200 MCH and Intel ICH7R chipset, features up to 8GB DDR2 800/667 memory capacity and PCI-E expansion slots support…. |
MI Audio Blues Pro overdrive guitar effects pedal demo with Strat & Fender Blues Jr amp
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2*15 watt @ 4ohm, TA2024 D-class Audio Amplifier Board $11.99 |
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4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board $50.00 |
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2*8W @ 8ohm/4ohm, MPS7720 D-class Audio Amplifier Board $9.99 |
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2*100W 4O TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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2*100w 4Ω TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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2*100w 4Ω TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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2*8W @ 8ohm/4ohm, MPS7720 D-class Audio Amplifier Board $9.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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2 x 68 Watt LM3886 + NE5532 Audio Amplifier Board Kit $10.00 |
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ClassT T-AMP TA2024 Audio Amplifier Board SMT 2X15 Watt $8.99 |
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150W 3 x LM3886 Mono Channel Audio Amplifier Board $18.49 |
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T-AMP Board T TYPE Audio Amplifier — 20Watt V2 TA2020 $8.00 |
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4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board $50.00 |
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NEC PX-42VM5A Audio Amplifier Board pt#PCB-5042H(MP1) $99.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $0.99 |
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T-AMP Board T TYPE Audio Amplifier — 20Watt V2 TA2020 $5.50 |
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ClassT T-AMP TA2024 Audio Amplifier Board SMT 2X15 Watt $9.99 |
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300W LME49810 Mono channel Audio Amplifier Board – New $54.99 |
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2*8W @ 8ohm/4ohm, MPS7720 D-class Audio Amplifier Board $9.99 |
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4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board $50.00 |
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New – 300W LME49810 Mono channel Audio Amplifier Board $49.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $0.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $0.99 |
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150W LM3886 X 3 mono channel Audio Amplifier Board New $16.90 |
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new 300W LME49810 Mono channel Audio Amplifier Board $49.90 |
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4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board $50.00 |
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2*8W @ 8ohm/4ohm, MPS7720 D-class Audio Amplifier Board $9.99 |
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2*100W 4Ω TK2050 Class-D Audio Amplifier Board-improved $39.99 |
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T-AMP Board T TYPE Audio Amplifier — 20Watt V2 TA2020 $52.00 |
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4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board $50.00 |
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2 x 68W Watt LM3886 + NE5532 Audio Amplifier Board $14.99 |
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4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board $50.00 |
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2watt D-Class mono audio amplifier board EUA2005, 2pcs $5.99 |
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ClassT T-AMP TA2024 Audio Amplifier Board SMT 2X15 Watt $8.99 |
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2 x 68W Watt LM3886 + NE5532 Audio Amplifier Board $14.99 |
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300W LME49810 Mono channel Audio Amplifier Board – New $54.99 |
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150W 3 x LM3886 Mono Channel Audio Amplifier Board $18.49 |
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Excellent 2 X LM3886+6N11Tube Audio Amplifier Board $36.00 |
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