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highrider

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Posts posted by highrider

  1. Troubleshooting MB-6582 NO 5V

    in MIDIbox SID

    Posted

    No, you're measuring 5V correctly... pins labelled 5V should be +5V relative to GND pins, everywhere, for all PSU options.

    I think you overlooked my solution:

    The problem MIGHT BE a missing bridge at J73, which connects the 5V out of S1 to the rest of the 5V tracks on the PCB.

    It's the only explanation for 5V at the power socket and power switch and not anywhere else.

    You were right! Unfortunately I made had to make a mess of the PCB to solder all of the bridges in PSU section but now it's fine and I'm reading 5V and 9V.

    Thanks for the help Jason!

    Vlad

  2. Troubleshooting MB-6582 NO 5V

    in MIDIbox SID

    Posted

    you're probably measuring DC and also measuring it against ground. If you measure AC between the outer pins of J1A, you'll get 9V.

    That is correct, I'm in the same mode on my multimeter for all the voltage readings because I've got no ******* clue how to operate this thing apart from getting some basic input. Yes, I was measuring against ground. However I have built some devices (mgb midi interface) successfully just by following the schematic and instructions carefully, so I hope with the MB-6582 I have done as well.

    Basically if you see 9V on J4 then that should mean your 9V regulation is fine.

    It's there and at at the right pins of the SiD IC's it's giving me the correct voltage.

    I'm publicly troubleshooting in the forum because I didn't get the right voltages at the PIC sockets. I got those low voltages of 0.30 / 0.27 that I noted in the previous posts instead. If I understand correctly that may be because I'm not measuring them with the right mode on my multimeter. So at the moment I'm guessing that I soldered everything in it's right place (no I'm not that noob, it's the late hours) and if I got the 9V right at J4 I should be fine and the only reason I'm not picking up the 5V at J4 and the PIC sockets is because I'm in the same mode on my multimeter and because I'm measuring them relative to ground?

    That jibberish aside I'm really grateful for the feedback man and the beer was never meant as a bribe, I just thought it had to be done, so why not!?

    Cheers!

    Vlad

    post-5594-126361249913_thumb.jpeg

  4. Troubleshooting MB-6582 NO 5V

    in MIDIbox SID

    Posted

    I'm not sure if you're measuring the 5V correctly out of the plug.

    Refer to the PCB layout: http://www.mb6582.org/plans/MB-6582_Base_PCB_R2_Color.pdf

    and measure 5V between the "5V" and "GND" pins on J1A (which is under J1, the power socket), J3 and J4

    These should all be the same, and the same as the C64 PSU output, since it outputs regulated 5V so the 5V and ground pins are connected directly to the PCB through the power switch.

    Since you measured 4.72V on the switch, I'm assuming they'll all show 4.72V and that indicates the PSU isn't that good... it really should be MUCH closer to 5V... like between 4.98V and 5.02V.

    Refer to this diagram: http://www.ucapps.de/mbhp/mbhp_8xsid_c64_psu_optimized.pdf

    to check the pins of the C64 PSU's plug.... the middle pin is ground, the one next to it is 5V.

    Note that some C64 PSU's the 5V will be on the OTHER side of ground than shown in this diagram, but this is handled on the PCB by the track between both pins under the socket.

    Ok,

    with the power switch in "off" position I'm reading

    J1A

    1 0.20

    2 5.05

    3 GND

    4 0.32

    I took another reading from the switch, with ground being pin 3 of J1A this time (switch off)

    S1

    1 5.06

    2 0

    3 0

    4 0.30

    5 0

    6 0

    So I assume the PSU is fine unless I should be reading 9v from S1 too. I measured the plug and i'm getting the same 5.06 out of one of the pin's. BTW I have attached a picture of the PSU's plug .The lower two pins ( the ones that are so cosy together) are measuring 5.05V, all other pins give me no V's.

    Now with the power on it's a different story.

    J1A

    1 4.55

    2 0.37

    3 GND

    4 4.72

    J3 0.31

    J4

    5v- No 0.29

    9v-Yes . 8.96

    12v- 0

    So i guess the problem starts at J4. I have soldered the bridge J71 with a resistor leg (that was before I discovered those neat bridges for sil headers), but it should be alright. the soldering joint is stable.

    Waiting patiently for a reply,

    Many thanks,

    Vlad

    post-5594-126356233744_thumb.jpg

  5. Troubleshooting MB-6582 NO 5V

    in MIDIbox SID

    Posted · Edited by highrider

    Hi guys, I thought it was all goodbut apparently I screwed up somewhere.

    Here are my readings taken from a red base pcb (from smashTV). The whole pcb is populated with everything apart from the IC's .

    Don't get me wrong I followed the instructions carefully and assembled the PSU option A.

    j3-0.57

    J25-12.73

    output of V1 (c12) -8.94

    sid socket's (1- 8) - 8.94

    Power switch pins

    1-0.56

    2-0.56

    3-0

    4-4.72

    5-4.72

    6-0

    I am getting 4.56 and 4.60 from the top two pins on the C64 PSU (with the plug facing you)

    I can't find 5v anywhere in the psu section of the pcb and I'm a bit lost here.

    If I missed some vital information, please let me know.

    Thanks,

    V!

  6. MB-6582 head bolts, nuts, screws, washers etc etc

    in Parts Questions

    Posted

    Hi.

    I tend to use Farnell http://uk.farnell.com/ for lots of this stuff. M3x10mm threaded spacers are about 10p each:

    http://uk.farnell.com/ettinger/05-03-103/spacer-m3x10-ni/dp/1466761

    I had the same experience with this sort of hardware on Ebay....

    Cheers

    Phil

    Thanks, for the fast reply. This really helped, I have found/ordered almost all of the parts. The only one left is the M3 countersunk head bolt. English is not my first language so I'm a bit challenged in identifying the right components. Could you please confirm if this the right bolt? Other than that I'm done with CS part's sourcing.

    http://www1.conrad-uk.com Part no.: 521676 - 89

    Thanks!

    Vlad

  7. Black on White LCD

    in MIDIbox SID

    Posted

    It has 8 data lines, which is a kind of a giveaway ;) It's parallel, all good.

    I took the liberty of deleting your double post and fixing the font-tags.

    Thanks, I'm glad you did! I should rename the topic ...I was looking for a white on black display after all.

    Please bare with me, I'm learning fast. The only DIY project I have completed before this one was the mGB Arduino and that was a snap compared to this stuff.

    Still the wiki and forum make it really straightforward..

    Oh the ramblings...

  9. Black on White LCD

    in MIDIbox SID

    Posted

    Ok, so I've nailed down this one called Batron .

    LCD MODULE, ALPHANUMERIC, 20X4

    No. of Digits / Alpha:80

    Illumination Colour:White

    Character Size:4.69mm

    Supply Voltage:4.6V

    Display Area Width:76mm

    Display Area Height:25.2mm

    Operating Temperature Range:0°C to +50°C

    SVHC:No SVHC

    External Depth:14mm

    External Length / Height:60mm

    External Width:98mm

    Background Colour:Black

    Character Width:2.9mm

    Connector Type:T, 1 x 16

    Display Technology:LCD

    Font Colour:White

    No. of Columns:20

    No. of Rows:4

    Supply Voltage DC:5V dc

    It's in the Uk so I will save on postage. Can somebody please confirm if this one has a serial interface or not?

    I can't find it saying that anywhere in the description or datasheet.

    Thanks!

    31779.pdf

  11. Black on White LCD

    in MIDIbox SID

    Posted

    Hi dudes!

    I may have not been posting, but I read a good part of the forum, in particular threads regarding the midibox sid.

    Couple of days ago i received my base pcb w/parts and cs psb for the *no praise is good enough* MB-6582. Soldering nice and steady ,it's looking good but I'm struggling to find the right display. See, i have plans to paint the pt-10 case white and I wanted to have the lcd to match. All i found so far are green on black, yellow on black but no white. I came to the conclusion that white characters are somehow technically difficult project on a black lcd, but that's silly, right? Or perhaps there is an invert option on this oneMy link http://www.crystalfontz.com/product/CFA634-TFB-KS

    Any advice would be appreciated.

    Hope you're all doing great!

    V!

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