So I have an NAD 302 integrated amp. It powers on fine but does not give any audio output. I have checked the fuses and the diodes. I have not removed the pcb and checked the transistors yet. I noticed some brown stuff at the bottom of the capacitors but I think it may be glue not discharge.
NAD 302 Integrated amp, no audio output
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by mecha1166OAUD Yamaha HS8S Audio one output only.
I have pulled the output board. Output txsistors are ok (only 2 main output). Everything measures the same on each side. Customer did not bring in speakers so I cannot go too deep. I did notice a greenish tint on the tip of the solder joints that connect to the COPPER output connectors. All 6 have a greenish tint at the tip - each side has 3 pins each. Anyone else have copper speaker output pins that corrode at the place on the PCB where they are soldered? I will try to add a photo. Thanks.-
Channel: Troubleshooting Audio Equipment
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The Problem: This player has a toggle switch to select between Stereo, Mono R, and Mono L. Regardless of the setting it outputs the sound to both the L&R audio jacks. In the Mono R position, the audio output level is normal (from both the L and R audio output jacks), in the Stereo position the audio output is about half the volume, and in Mono L, it's about 3/4 the volume. Something about putting it into Stereo mode is causing the volume to drop significantly and I can't figure it out.
The player processes the audio signal using two different reference frequencies. The "R"...2 Photos -
by FrancescoVGood morning everyone,
I'm trying to repair an onkyo ht-r390 that has no sound output, despite the volume being at maximum, the rest seems to work; the video output signal (coming from an hdmi input) is present, but the audio is absent. Similar situation if I send an audio signal from any input I have no output.
The firmware reported is the following:
M:1.00/11107BLP
D:?.??/????????
O:1.00/11107AL
The DSP firmware given the question marks seems corrupt.
On the BCHDM-0678 - 25140678 - QPWBCHDM0678A0 board the chip that usually seems...-
Channel: Troubleshooting Audio Equipment
05-11-2025, 02:59 AM -
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by flibidyI have here a Magnum IA.100 which belongs to my parents.
The unit powers on & when the relay kicks in, you get a pop from the speakers (this might sound weird but is usual behavior for this amp). However, you get nothing coming through it from any of the inputs & no pops and crackls from any of the controls.
Because of the sound from the speaker when the amp turns on I have assumed that the output section probably works but I could be wrong & I'm not sure how to test that side of things further.
What Ive done........8 Photos-
Channel: Troubleshooting Audio Equipment
01-01-2025, 01:26 PM -
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by classicandyHi All,
Please, I need help in getting my audio output to work. I did a conversion from DIS to UMA in HP Pavilion 15-N AMD (Model: U92) BUT I'm not getting any sound. I think the audio is tied to the faulty graphics chip. Is there any way i can convert the audio too?
Thanks
[MOD EDIT]
Link to Quanta U92 Schematic - https://www.badcaps.net/forum/troubl...hematic-needed - Loading...
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