Forum: Troubleshooting Audio Equipment
Yesterday, 10:21 AM
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Replies: 8
Views: 136
Re: Intimidation Professional sub advice please
There likely is no protection circuit. I suspect the output mosfets could also be bad, I see what looks like a lead trimming or solder splash on the mosfet lead in the lower left of your picture.
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Forum: General Electronics Technical Discussion
06-25-2022, 04:11 PM
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Replies: 11
Views: 181
Re: Conversion of Anolog Voltmeter into Ammeter
You would need to remove the 3k in series and then use a shunt across the movement.
As the meter is now, 3 volts gives FSD, with a resistance of 3500Ω the current through the movement is about...
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Forum: Troubleshooting TVs and Video Sources
06-25-2022, 12:12 PM
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Replies: 7
Views: 148
Re: Bn44-00623B pfc mosfet very hot
How was QP802C shorted? was it shorted D~G ? if it was you may have damaged the gate drive components, likely a shorted diode. Also check if there is a zener diode off the IS pin of the drive ic that...
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Forum: Troubleshooting Audio Equipment
06-25-2022, 11:24 AM
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Replies: 8
Views: 136
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Forum: General Electronics Technical Discussion
06-25-2022, 10:23 AM
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Replies: 11
Views: 181
Re: Conversion of Anolog Voltmeter into Ammeter
That is battery tester and likely has an internal load resistor to load the battery to get a proper reading when testing 1.5v batteries. It likely won't move with .3v
With your current setup 12v, 8Ω...
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Forum: Troubleshooting Game Consoles & Other Weird Devices
06-24-2022, 12:54 PM
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Replies: 17
Views: 243
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Forum: Troubleshooting Game Consoles & Other Weird Devices
06-24-2022, 09:30 AM
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Replies: 17
Views: 243
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Forum: General Electronics Technical Discussion
06-21-2022, 09:20 AM
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Replies: 6
Views: 183
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Forum: Troubleshooting TVs and Video Sources
06-20-2022, 09:47 AM
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Replies: 27
Views: 589
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Forum: Troubleshooting TVs and Video Sources
06-19-2022, 06:37 PM
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Replies: 1
Views: 100
Re: zenith plasma Z50PX2D
Why not post a picture of the problem. it could be anything if it effects the sound as well as the picture, it could be the input source connector is loose,
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Forum: General Electronics Technical Discussion
06-19-2022, 05:23 PM
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Replies: 4
Views: 160
Re: SMD marking 2290?
Thanks for the info, Macom has other amp ic's like this but I can't seem to figure out their part number scheme, The top number is the part number (22)
In the datasheet for the MAAM-011220, it...
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Forum: General Electronics Technical Discussion
06-18-2022, 09:51 PM
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Replies: 4
Views: 160
Re: SMD marking 2290?
What is the board from? What is the make and model? It may be a custom number.
What is wrong with the part?
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Forum: Troubleshooting Computer Displays
06-17-2022, 08:36 PM
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Replies: 2
Views: 161
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Forum: General Electronics Technical Discussion
06-16-2022, 05:55 PM
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Replies: 6
Views: 183
Re: Thermistor specs and cross reference
I agree, 100k. According to the datasheet TTC-005 = 5Ω, TTC-101 = 100Ω etc. On the next page it seems wrong and should likely be (KΩ) TTC-102 = 1Ω? likely should be 1K so TTC-104 should be 100K
If...
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Forum: General Electronics Technical Discussion
06-15-2022, 09:55 PM
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Replies: 45
Views: 815
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Forum: General Electronics Technical Discussion
06-15-2022, 07:36 PM
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Replies: 45
Views: 815
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Forum: General Electronics Technical Discussion
06-15-2022, 01:59 PM
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Replies: 45
Views: 815
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Forum: General Electronics Technical Discussion
06-14-2022, 09:04 PM
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Replies: 45
Views: 815
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Forum: General Electronics Technical Discussion
06-14-2022, 07:59 PM
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Replies: 45
Views: 815
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Forum: General Electronics Technical Discussion
06-14-2022, 05:58 PM
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Replies: 45
Views: 815
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Forum: General Electronics Technical Discussion
06-14-2022, 04:27 PM
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Replies: 45
Views: 815
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