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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This specification for the DELL Latitude 3340 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 3340 boardview and 3340 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL Latitude 3340...09-07-2024, 07:19 AM
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