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  1. Frantic Freddie II, a new homebrew release on Commodore 64

    https://www.vintageisthenewold.com/frantic-freddie-ii-a-new-homebrew-release-on-commodore-64/


    https://www.youtube.com/watch?v=KURxjjMxdvA
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    I installed the flyback but no go. There seems to...

    I installed the flyback but no go. There seems to be no load at all ( 125v @ b+ ) and buzzing is coming from the switch mode & possibly the new flyback as well.

    Removed flyback, installed load at...
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    Super Marios Bros for the Commodore 64

    https://www.youtube.com/watch?v=uNPtLPnwqGg
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    I'm biased towards Apple IIs and the c64 but the...

    I'm biased towards Apple IIs and the c64 but the A8 surpasses them in many ways.

    https://www.youtube.com/watch?v=tiLB8PQUJtc
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    I couldn't find anywhere else to put them. I have...

    I couldn't find anywhere else to put them. I have the Apple IIe in between the Atari 800 and the C64, I think it's best to keep the two rivals away :)
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    Picked this up a few weeks ago. The PVM is...

    Picked this up a few weeks ago. The PVM is temporary until I can get the original composite monitor working ( suspected dead flyback ).

    Still no colour with the PVM even though it handles NTSC and...
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    Ordered the FCC1415XL replacement. Should be here...

    Ordered the FCC1415XL replacement. Should be here in a couple of days.

    Lets see if this works out.
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    Unfortunately don't have one. So I'm going to...

    Unfortunately don't have one. So I'm going to have to shotgun the chassis and replace the main caps in the power supply.

    Whilst the cap looks good and isn't leaking, the gas might be escaping from...
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    I got the info from Apple II enthusiasts group in...

    I got the info from Apple II enthusiasts group in FB. I'll do a bit more digging when I have time and see what I can find.

    There is also considerable capacitor squeal or whine that seems to be...
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    I worked on the monitor this morning and I'm...

    I worked on the monitor this morning and I'm pretty sure the flyback is shorted. This is obvious because B+ is virtually down to 0 volts with it installed.

    So I removed the fly-back, put a load (...
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    No change with the new HOT. With that replaced...

    No change with the new HOT. With that replaced and the fly-back soldered back in to the board, there is virtually no DC voltage on the B+.
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    We will see, I'm counting on the flyback being...

    We will see, I'm counting on the flyback being OK.

    It won't be perfect though. The front flap with the Apple logo is missing.

    Let me know how else I can help. Happy to provide info since mine...
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    Yes it's 0.5 ohms ( green black silver ). Sorry...

    Yes it's 0.5 ohms ( green black silver ). Sorry for the typo.

    Any other surprises ?

    So far I've only found one bad component and it's the HOT, of course I have no way of testing the flyback...
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    R511 - 15k Br Gr Or R502 - 10ohm Br Bl Bl R508...

    R511 - 15k Br Gr Or
    R502 - 10ohm Br Bl Bl
    R508 - 10ohm
    R504 - 27ohm
    R503 - 220k R R Y
    R507 - 0.50 ohms Gr Bla Sil / measure around 0.30 ohms
    R162 - 39ohm Or Whi Bla
    R163 - 39ohm Or Whi Bla...
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    Something else in that circuit must be out of...

    Something else in that circuit must be out of wack and your new value worked around it somehow.

    Wish there was schematic for this.
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    I stand corrected. It is indeed 27 ohms. ...

    I stand corrected.
    It is indeed 27 ohms.

    145222
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    There's hardly anything out there. Hope I can get...

    There's hardly anything out there. Hope I can get this working without too much trouble as I have a IIe enhanced which has the the same motherboard as the Platinum and needs a monitor that can handle...
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    Thanks for the great info! I ordered a couple...

    Thanks for the great info!

    I ordered a couple D1651s in case I miss something first try and will definitely get in there and check the components around the flyback and HOT. I've read some posts...
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    I just got the same monitor with a similar...

    I just got the same monitor with a similar problem. Buzzes when turned on, thought it was the fly-back as well but it could still very well be.

    The original value of the resistor is supposed to be...
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    Easier just to replace the switch, there is...

    Easier just to replace the switch, there is someone selling them on ebay. It's not an exact match but I got mine to work with minor modification.

    I just leave the switch in the on position and...
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    Here's an update to my Commodore 1084 repair....

    Here's an update to my Commodore 1084 repair. Same monitor, different issue. Thought I'd share the repair log on AA too.

    --

    During my Hypersports repair I discovered a problem with the display...
  22. Thanks for the heads up. I did try that...

    Thanks for the heads up.

    I did try that initially but what threw me off was when it popped up with an error saying there was poor contact with pin 43 even though it's only a 42 pin chip. So...
  23. Thanks for the heads up. It just seems odd...

    Thanks for the heads up.

    It just seems odd that both chips would have the same stuck bits at exactly the same memory address.

    The MX29F1615 seem to be a very good alternative and they're...
  24. My understanding is that these chips come off NBA...

    My understanding is that these chips come off NBA Play By Play.

    Thanks for the input guys. I was going to order a couple more but that seems somewhat risky based on your experience.

    How about...
  25. EEtools TopMax. Problems verifying blank M27c160s or erasing.

    I posted a similar thread on KLOV but there are some really knowledgeable people in here that can help too :)

    I have a couple of ST M27C160 EPROMs that someone sent in for programming but both...
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