Hi. A customer brought in a Tascam CC-222MKIV. Play/Record buttons on CD are broken. I am looking for a mechanical parts breakdown so I can get the part number for this key assy. I found the schematic online, and I can tell you the schematic locations for those switches themselves. There is a plastic assembly with buttons that each have shafts to poke the surface switches on the circuit board right behind the faceplate. That is what I need. Thanks!
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I 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........01-01-2025, 01:26 PM -
​Hello
Laptop E15 I5 10gen
Mb nm-c421
I have a problem with the usb-c power dc.
The motherboard start only in one side of the usb-c
Replace the usb-c port 2 times same problem
With the usb-c meter, one side 20v ok, other side the usb-c meter don't come on
Try to test the pin with the Mechanic Tail insertion tester and every pin are ok ?
Can the pd controler be the fault ? Or something else maybe ?
Thx
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All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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Right SIDE usb.c port charges and transfers data without issue, two left side uSB c ports charge but do not receive or see data. Was liquid damaged, and repaired significantly and thought we were in the clear but appears this is the last issue that is rearing its head. I am trying to locate the RETIMER chip that communicates the DATA TX/RX but I cannot seem to find it on the schematic or maybe I am just so tired my eyes wore out lol. Any help would be great.05-29-2025, 10:35 AM
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Hi guys
I have a faulty Xilence ATX PSU here
The fault basically is I have two short circuit power transistors on the primary side of the large SMPS transformer - they are 2SC3320.
There is another smaller transistor on the primary side C3866 which tests ok
The PSU has three transformers - it looks like the 2SC3320's drive the big one and the C3866 drives one of the small ones. There is a separate PFC PCB with it's own controller and MoSFETS
There is also a short on the 3.3V output and a near short on 5V - I suspect this probably blew...