Hello everyone. DAC as in the title. After connecting the power supply, the standby mode, the diode lights up, the display is dark. Pressing the power button does not change anything externally. Comes voltage of 1.55V on the controller oscillator, which however disappears after a few seconds. There are no oscillations. Does anyone have experience with servicing these devices? Does anyone have a service manual or a diagram? Thanks in advance for any help
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Hello all. I'm currently trying to repair a damaged PC engine LT (a portable games console circa 1991)I got a few years ago. The thing had 10+ lifted pads and three lifted traces from corrosion from bad caps when I got it, and the first step was to clean it and repair the traces and pads as best I could using some copper and a high temperature two part epoxy, then replace the capacitors. Of course it would be amazing if that had fixed the console, but things are never so simple. I've double checked the capacitors, and I'm (90%) confident that they have connectivity where they need to have connectivity,... -
Hi just wondering if anyone knew the part ID for the crystal Oscillator on the Steam Deck i've attached an image of the broken part on my board.
Thanks...02-02-2024, 12:56 PM -
The MT3608 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small, low power applications. The MT3608 switches at 1.2MHz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height.
Internal soft-start results in small inrush current and extends battery life.
The MT3608 features automatic shifting to pulse frequency modulation mode at light loads. The MT3608 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload. The MT3608 is available...10-07-2024, 05:02 AM -
I'm troubleshooting a reel controller board for an IGT slot machine. The digital section seems to be dead. There is no USB communication, PC or utility program for flashing firmware do not see it but they do see good/working boards. I noticed the waveform on the crystal is very erratic/asymmetrical/glitchy on the bad one compared to the nice even waveform on a good board. My question is would this most likely be caused by a bad crystal or something gone bad in the circuit loading it down? I'm attaching a couple pictures of my scope probing the good and bad boads. -
Hi All,
I have an old Denon DR-M10HX cassette deck and want to service it.
I have aquired some test tapes and I have a scope. When I connect the scope to the L&R line level outputs I see a great deal of high frequency noise. Equally when I play a 3.5KHz test tape it's hard to see the test frequency through the noise.
Any advise would be welcome.
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