I started replying in another thread but didn't want to hijack that and confuse people with my responses.
My previous post(s) are below:
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I've got an AL1706b that's completely dead - no led, no power, nothing.
Input fuse @ 2A/250v checks out, and all caps visually look good. No leaks, no bulges.
This is the Rev: C board dated 2005.11.04 and was working perfectly until a couple days ago.
I know caps can look fine and be bad, but I don't want to waste my time replacing a bunch of caps to find out it's something else. It'd be one thing if I had the assortment here already, but most of these would be custom-order, which only adds to the hassle.
Thanks!
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((REPLY FROM RETIREDCAPS))
It sounds like you have a multimeter. If you know how to use it, see if the secondary voltages, usually 5V DC and/or 12VDC, are present on the connector between the power board and logic board.
If not, carefully measure the DC voltage across the main filter capacitor. It should be 1.4 * mains.
Post clear focused pictures AFTER reading
https://www.badcaps.net/forum/showthread.php?t=1868
Please do not post pictures inline.
Take your boards to a window on a sunny day, turn flash off, and use macro mode. Take a top down view of all your boards (front and back). Make sure the photo is legible so that we can read the PCB printing clearly. A shutter speed of 1/125 or faster will produce nice clear focus pictures. Try to get a photo that is 2000x2000 resolution or as close as possible.
Here is an example of the pictures we want.
https://www.badcaps.net/forum/showpos...94&postcount=1
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I'm on the way out the door to a wedding so will post more details/pics when I get back.
Quick measurements show that both 5v leads going to logic board are good, doesn't look to be a 12v line, and there is minimal voltage (around 1v or so if I remember correctly - I don't know the spec though) on the other non-ground leads as well. Voltage at main cap is ~170v.
Probably doesn't help without any more info though - I'll get to that when I return.
I hate to hijack a thread - if this belongs on its' own, feel free to split it!
Thank you.
===============================
Photos attached below.
My previous post(s) are below:
===============================
I've got an AL1706b that's completely dead - no led, no power, nothing.
Input fuse @ 2A/250v checks out, and all caps visually look good. No leaks, no bulges.
This is the Rev: C board dated 2005.11.04 and was working perfectly until a couple days ago.
I know caps can look fine and be bad, but I don't want to waste my time replacing a bunch of caps to find out it's something else. It'd be one thing if I had the assortment here already, but most of these would be custom-order, which only adds to the hassle.
Thanks!
===============================
((REPLY FROM RETIREDCAPS))
It sounds like you have a multimeter. If you know how to use it, see if the secondary voltages, usually 5V DC and/or 12VDC, are present on the connector between the power board and logic board.
If not, carefully measure the DC voltage across the main filter capacitor. It should be 1.4 * mains.
Post clear focused pictures AFTER reading
https://www.badcaps.net/forum/showthread.php?t=1868
Please do not post pictures inline.
Take your boards to a window on a sunny day, turn flash off, and use macro mode. Take a top down view of all your boards (front and back). Make sure the photo is legible so that we can read the PCB printing clearly. A shutter speed of 1/125 or faster will produce nice clear focus pictures. Try to get a photo that is 2000x2000 resolution or as close as possible.
Here is an example of the pictures we want.
https://www.badcaps.net/forum/showpos...94&postcount=1
===============================
I'm on the way out the door to a wedding so will post more details/pics when I get back.
Quick measurements show that both 5v leads going to logic board are good, doesn't look to be a 12v line, and there is minimal voltage (around 1v or so if I remember correctly - I don't know the spec though) on the other non-ground leads as well. Voltage at main cap is ~170v.
Probably doesn't help without any more info though - I'll get to that when I return.
I hate to hijack a thread - if this belongs on its' own, feel free to split it!
Thank you.
===============================
Photos attached below.
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