Author Topic: 6128 plus problems (keyboard and floppy drive)  (Read 1673 times)

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Offline Loupingre

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #25 on: 17:27, 26 June 21 »
What does that mean? You looked and found none? Or you're assuming? Have you checked the joints on the power connector and then checked whether the motor turns at all (they can be very quiet without a belt).

Bryce.
Hi Bryce,

Yes, I've already looked and done some re-soldering on J2. When the CPC is switch on, I 've measured 5V on J2. It seems to me that the motor never turns on.






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Offline gerald

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #26 on: 17:45, 26 June 21 »
It might be Q3 that is blown (just behind J2). You should see 5V on each side of its 2 pins. If not, just short it  ;D .
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Offline Loupingre

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #27 on: 18:25, 26 June 21 »
It might be Q3 that is blown (just behind J2). You should see 5V on each side of its 2 pins. If not, just short it  ;D .

I've got 3,35 V on Q3, is it bad or not ?
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Offline Loupingre

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #28 on: 10:25, 05 July 21 »
Any other advice ?
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Offline Bryce

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #29 on: 10:35, 05 July 21 »
I've got 3,35 V on Q3, is it bad or not ?

On which side of Q3 do you have 3.35V? Input or output? Either way, both would be bad, it should be 5V.

Bryce.
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Offline Loupingre

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #30 on: 22:38, 05 July 21 »
Hi Bryce,

* On J2, I've got 5V between pin 4 and pin 3/2.
* On Q3, I've got 3,3V today between the 5V track (red probe) and the other (black probe), and -3,3V between the other track (red probe) and the 5V track (black probe).

[Edit] Quick update ! I've "shorted" Q3 (with a small wire) to do a test and the drive is working (I've successfully launched Robocop ^^)! Is Q3 a fuse or something like that ?
I 'll prefer to replace the component instead of leaving the wire (if I can find something which can replace Q3).
« Last Edit: 21:50, 06 July 21 by Loupingre »
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Offline Loupingre

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #31 on: 11:59, 26 July 21 »
Hi all,

Back from holidays :) Any advices about the Q3 component ?
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Offline Bryce

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #32 on: 12:46, 26 July 21 »
We never quite worked out what Q3 is, but it's assumed that it's some sort of fuse. I just short it out as you did when I find one that has failed.

Bryce.
 
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Offline Loupingre

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Re: 6128 plus problems (keyboard and floppy drive)
« Reply #33 on: 16:03, 26 July 21 »
Thxs Bryce ! So my 6128+ is fixed, I'll just need to add an external hxc/gotek :)
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