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Thread: For $200 I'm expecting the worst...

  1. #41
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    It's fun cleaning her up, huh?
    famous beagle

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  3. #42
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    Quote Originally Posted by famous beagle View Post
    It's fun cleaning her up, huh?
    Yeah...strangely so.

    It's really clean inside:

    img_7012-jpg


    I replaced the hex inverter chip for the L-R buss auto-switching...this has been a seemingly growing problem on the 388...failure of U4 on the BUSS B PCB...makes it so you can't monitor anything assigned to the L-R buss, or causes problems monitoring the sum of the monitor mixer. This 388 was working fine in this regard but I'd rather be able to say it won't have that problem in the future.

    img_7013-jpg


    And I'm disassembling the faders and cleaning them. This is an area I recall being an issue with my old 388...this style of fader is ripe for issues with dirt since the element is oriented horizontally. So I open them up and clean them out, and also gently flex the wipers to ensure good contact in the future. I had a BUSS MASTER fader on my old 388 that was intermittent.

    img_7017-jpg


    Lookit the dirt that comes off of just one of these small fader elements:

    img_7018-jpg

  4. #43
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    Top-notch work Cory!
    famous beagle

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    This is an example of a 388 that would be justified if priced around $1650. They sell for up to 2K here in NYC and that's only with nothing but a "works good" in description.

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  7. #45
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    Been spending a little time the last several nights working on the 388.

    There was a tweaked connector on the power supply PCB...was getting some intermittent power issues to the system logic...so I repaired that and reflowed all the solder joints to the connectors on the power supply PCB as well as on the corresponding joints on the motherboard. All better now.

    It's pretty much all cleaned up...I'd give it a solid 8+/10. Degaussed the headblock assembly, aligned the meters, and aligned the playback label. Tomorrow I'll finish up with checking the bias levels and doing the record level alignment.

    Because I've been noticing the tape packs are sloppy I wanted to double check the tape tensions, so I did that tonight too.

    img_7057-jpg


    The tension arm roller positions in PLAY mode were pretty much spot-on, as were the holdback and takeup tensions. REW and FFWD tensions were another story...they were both 20-30g too high. I have a suspicion the thicker tape that came with the machine (456 vs 457 or LPR35) is to blame...betcha if I'd mounted some 1mil tape those tensions would be closer to spec. But it's setup for the 456, and I'm going to be selling some with the machine so I dialed in the REW and FFWD tensions.

    There's another typo in the manual: on page 1-27 of the service manual, the reel servo PCB reference chart says trimmer R105 is associated with the FFWD mode tension setting, and R206 is the trimmer to adjust the tension in REW mode...that's backwards. R105 does the REW tension, and R206 does the FFWD tension.

    Anyway, the tape packs are improved now.

    And here it is at the close of tonight's work...I've gone through and double checked all the functions and it still kinda floors me...I'm not used to stuff just working, but absolutely everything works.

    img_7058-jpg

  8. #46
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    Beautiful! Congratulations on getting a great deal; I hope you make a healthy profit on it. You deserve it for sure!
    famous beagle

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  10. #47
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    Except for a few dings in the Naugahyde..... that looks about perfect!!!
    Brad Bachelor
    "Marrying an old bachelor is like buying second-hand furniture." - Helen Rowland

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  12. #48
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    It's been mentioned before, but I think you'd be helping out owners of these things if you maybe ran a Criagslist ad offering repairs etc for this era of Tascam stuff. These threads are yr referrals.

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  14. #49
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    I brought that same thing up.

    As to the 388. That will make someone a real nice Christmas or thanksgiving day present as well as putting a few much needed dollars in your pocket.

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    Man you got a great deal! There are still alot of people that are crazy about these machines and looking for them far and wide. You'll have no problem selling it for a good profit. Now if it were me, I'd probably have a hard time letting it go even though I have 2 functioning units. Kinda silly, but I'm always keeping an eye out for another one at a nice cheap price like you got.
    We've got bush,We've got bush!!!

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