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 Post subject: [CLD-D704] Unexpected component failures
PostPosted: 14 Dec 2017, 19:56 
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Here's a new one.
The optical digital output on my CLD-D704 has quit working. The coaxial output still works fine!
Now, you might think this is a failure in the optical transmitter module, but it's still sending out light, so that seems unlikely. Maybe a resistor or capacitor downstream of where the two digital outputs branch off has open-circuited? I'm not totally sure, alas, because I don't have a schematic diagram. (The manual LDDb has for the D703 doesn't contain anything more detailed than a block diagram which doesn't even show the digital outs.) So I'll have to open it up.

Edit : the diagram for the CLD-99 seems to contain the necessary information. And there really isn't a lot to fail. Two resistors, two capacitors, & an inductor.

What's the oddest thing you've had fail?
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 Post subject: Re: Unexpected component failures
PostPosted: 14 Dec 2017, 20:28 
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My Sony BVM-20F1J is a weird monitor for sure. The RGBs-board works perfectly fine. I have both a BKM-21D and 24N installed. While both are detected by the CRT and changes can be made to the settings, I've never gotten any image through either boards.

Also, when displaying 480/60i on the CRT, there's something going on with the aperture grill. You get weird vertical lines, like the aperture grill is being light up. Very annoying once you see it. However, enabling 16:9 or underscan mode resolves the issue completely and gives a much better image. When in underscan, I can change the scan area and fill the screen and still not get that weird artifact. And it only happens with 480/60i. For 240/60p, 288/50p and 576/50i, the issue isn't there to being with.
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 Post subject: Re: Unexpected component failures
PostPosted: 14 Dec 2017, 20:57 
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publius wrote:
Edit : the diagram for the CLD-99 seems to contain the necessary information. And there really isn't a lot to fail. Two resistors, two capacitors, & an inductor.


I'll blame one or both of those capacitors; seems everyone else does and more often than not they're right!!
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 Post subject: Re: Unexpected component failures
PostPosted: 15 Dec 2017, 04:29 
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publius wrote:
The optical digital output on my CLD-D704 has quit working. The coaxial output still works fine!


We had a successful repair story of these babies here recently:

CLD-97 Optical output repaired

Julien
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