Jump to content

graantjes

Members
 View Profile  See their activity

  • Posts

    34

  • Joined

  • Last visited

 Content Type 

Posts posted by graantjes

  3. FS: MB6582 allmost complete

    in Fleamarket

    Posted

    I am selling this allmost completely build MB6582 with all parts included. I stopped this project because I had 2 bad power supplys and

    didnt have the time to look for a decent old one when I needed it. I have had the board sent to strophlex and he confirmed it was working

    with his power supply.

    kaoakk.jpg

    I am looking for 450 euro, shipping can be to anywhere, payment trough bank transfer or paypall

    best regards, Joeri

  6. mb6582 voltage check

    in MIDIbox SID

    Posted

    So how do the pins underneath the test pads measure out with you guys? If I can confirm that this psu works, I can exclude this from being the problem.

    Orange hand: So in case of the psu with 5v on pin 5, is it normal to not measure it on the test pad?

    thanks!

  7. mb6582 voltage check

    in MIDIbox SID

    Posted

    Well, sadly enough that pin 4 on my psu measures nothing, it is pin 5 on the other side of pin 2 that measures 5v (I am orienting my connecter the same way as you with the opening on top)

    There seems to be many different c64 power supply` s in rotation.

    thanks,

    best regards, Joeri

  11. mb6582 voltage check

    in MIDIbox SID

    Posted · Edited by graantjes

    ok, that explains a lot. Now the power supply measures ok.

    So doing this one step at a time,

    I looked at the base pcb pdf and turned the board around with the psu connected and the switch off. the outer lugs measure 9vac but when I measure the inner lugs (red probe on 5v, black probe on gnd) it measure nothing.

    thanks for the patience :) It` s really appreciated.

    best regards, Joeri

  12. mb6582 voltage check

    in MIDIbox SID

    Posted

    Don't confuse the DC and AC pins.

    Pin 5-2 should measure 5V DC

    Pin 6-7 should measure 9V AC

    Don't mix and match. Measuing between dc and ac pins will give you strange readings.

    5 and 2 are ok,

    But when I measure ground (1 or 3) against 6 or 7 I get strange readings (and I do know how to set the multimeter to AC)

    thanks

  14. mb6582 voltage check

    in MIDIbox SID

    Posted

    ok, So I got a ``new`` power supply in the mail today and the 7 pins measure out fine,

    what` s the next thing to do considering the 2 almost broken pads and the bridge that is gone. I don` t want to brake something so I am taking it slow this time.

    best regards, Joeri

  15. mb6582 voltage check

    in MIDIbox SID

    Posted

    I also measured the psu pins and I have a correct 5VDC pin and a 9VAC pin

    I know,that was before, who knows how I broke the psu?

    I have a new c64 psu on the way. I also took it apart and it seems it doesn` t have an internal fuse, so something must be broken. I will get there eventually :)

    technobreath: the psu was fine before, it seems to be broken now... the beginning and end checks I understand, it` s when it comes to understanding the circuit itself and looking for errors there when I need some help.

    Thanks everybody, I will post next resulst when my new psu is in.

    best regards, Joeri

  16. mb6582 voltage check

    in MIDIbox SID

    Posted

    Hi Strophlex,

    The fuse is still ok, I replaced it with a new one and it gave me the same results. The power connections on the back don` t give me the needed voltages though. I guess I will be searching for another power supply.

    Thanks,

    best regards, Joeri

  17. mb6582 voltage check

    in MIDIbox SID

    Posted

    With the outside fuse I mean the one you can see a little in the bottom-left corner of the psu in the picture. It is a cylindrical hole with a fuse inside next to the power chord.

    With the square connector I mean the square pad on the bottom of the psu connection which should measure 9vac according to the base pcb diagram.

    I will replace the inside fuse tomorrow and let you know.

    thanks!

    best regards, Joeri

  18. mb6582 voltage check

    in MIDIbox SID

    Posted

    1262tz7.jpg

    I think you may be right, I only concentrated on the fuse of the psu on the outside, which is fine but there is one in the inside as well?

    I used to have 9vac at both pins on the connector at the backside, now I only have 9vac at the round connection and not at the square one. 5vdc is absent.

    thanks again for the patience,

    best regards, Joeri

  22. mb6582 voltage check

    in MIDIbox SID

    Posted

    So, the state now is that

    - the bridge at J73 is removed.

    - The power switch is soldered.

    - There is no short between ground and 5V. (Measured by connecting multimeter in continuety mode between J73:pin2 and J3:GND for example. PSU disconnected, power switch on and no beep from meter).

    - There is 0 V DC reading on multimeter with PSU connected and switch on between J73:pin2 and J3:GND.

    Did I get all that right?

    that` s correct,except that I did get a beep on the backside sometimes between J73:pin2 and J3:GND, but the contact on the backside (from J73:pin2) is loose from trying to desolder the bridge, so now it doesn` t beep anymore...

    hope this helps :)

    best regards, Joeri

  24. mb6582 voltage check

    in MIDIbox SID

    Posted

    J3:5V - J3:GND

    Switch:1 - Switch:2

    Switch:1 - J3:GND

    Switch:2 - J3:GND

    Which ones beep?

    Without the power on, none of them beep. I am sorry to inform you that I have been checking the continuity with the power on, a friend told me it was done that way but I guess he was wrong... On the bright side: I will never forget

    this again :)

    best regards, Joeri

×
×
  • Create New...