Help me identify this Nanao chassis from my Madonna

    This site uses cookies. By continuing to browse this site, you are agreeing to our Cookie Policy.

    • Help me identify this Nanao chassis from my Madonna

      I'm finally making time to tinker with the Madonna. Going to pull this chassis soon and clean and recap. The label on it is very faded.

      It's very faint but I think it says MS8 - 2xxx
      so I can't tell if it's a 25 or 26 and which one.

      This is located in an IREM Madonna.

      ibb.co/S3cf6Qj
      ibb.co/g6zRm6z
      ibb.co/Khd17gR
      ibb.co/F7hWm0m
      ibb.co/4JJH9h3

      Thank you!
    • MS8-25FAR cap lists

      There are two different revisions of this chassis with some small differences in caps. The discerning feature between the revisions is the additional daughter board on the top left corner, PCB-VIDEO.



      Chassis w/ PCB-VIDEO:

      Source Code

      1. Capacitor Qty Note
      2. 0.47uf 160V 1
      3. 1uf 50V 4
      4. 1uf 100V 1
      5. 1uf 200V 1
      6. 4.7uf 25V 1
      7. 4.7uf 100V 2
      8. 10uf 16V 1 Bipolar
      9. 22uf 250V 1
      10. 33uf 16V 1
      11. 33uf 16V 1 Bipolar
      12. 47uf 16V 2
      13. 100uf 16V 1
      14. 100uf 35V 2
      15. 100uf 160V 2
      16. 220uf 16V 1
      17. 220uf 25V 1
      18. 220uf 50V 1
      19. 330uf 16V 1
      20. 470uf 16V 3
      21. 470uf 35V 1
      22. 680uf 25V 1
      23. 680uf 180V 1 Large filter cap
      Display All


      Chassis without PCB-VIDEO:

      Source Code

      1. Capacitor Qty Note
      2. 0.47uf 160V 1
      3. 1uf 50V 4
      4. 1uf 100V 1
      5. 1uf 200V 1
      6. 4.7uf 25V 1
      7. 4.7uf 100V 2
      8. 22uf 250V 1
      9. 33uf 16V 1
      10. 33uf 16V 1 Bipolar
      11. 33uf 35V 1
      12. 47uf 16V 3
      13. 100uf 35V 2
      14. 100uf 160V 2
      15. 220uf 16V 1
      16. 220uf 25V 1
      17. 220uf 50V 1
      18. 330uf 16V 1
      19. 470uf 16V 3
      20. 470uf 35V 1
      21. 680uf 25V 1
      22. 680uf 180V 1 Large filter cap
      Display All


      Neck board:

      Source Code

      1. Capacitor Qty
      2. 10uf 250V 1


      05V00220-2, sub-PCB:

      Source Code

      1. Capacitor Qty
      2. 1uf 50V 2


      05U02038-1, sub-PCB:

      Source Code

      1. Capacitor Qty
      2. 1uf 50V 4


      05B00856B1 (PCB-VIDEO), sub-PCB (only on the other revision):

      Source Code

      1. Capacitor Qty Location
      2. 2.2uf 35V 3 C262, C263, C264
      3. 47uf 16V 5 C250, C251, C252, C265, C270
      4. 470uf 16V 1 C266

      The post was edited 7 times, last by nem ().

    • @nem I am starting to compare and go through my MS8-25FBC (My Q25 chassis) and MS8-25FAR (Spare)

      C574 on both my chassis are 35v 33uF polarized. The pcb also has polar markings on both for C574.
      You have it listed as a 16v 10uF BP cap.
      Q GrandAm 25 | MKII | NNC | Medieval Madness Remake | JNX SuperGun
      First Cab: Centipede (1987)
      Arcade Tech since 1994
    • ReplicaX wrote:

      @nem I am starting to compare and go through my MS8-25FBC (My Q25 chassis) and MS8-25FAR (Spare)

      C574 on both my chassis are 35v 33uF polarized. The pcb also has polar markings on both for C574.
      You have it listed as a 16v 10uF BP cap.

      I'm going through my notes right now, and in it I have it listed as a bipolar 10uf 16V :/

      Anyway, I'll pull out the chassis from the Madonna next week and go over the map.

      EDIT: in a hand drawn map for MS8-25FA I have here, there is indeed a polarized 33uf 35V in the same spot. Weird.

      The post was edited 4 times, last by nem ().

    • nem wrote:

      More than likely I have put 10uf 16V BP caps in place as per my notes, so not sure what help pulling out the chassis will be. All I can say is, it works fine with a 10uf bipolar cap :P

      Anyway, I've now fixed the map and the cap list. Did you notice anything else different, @ReplicaX?

      Thanks!
      I'll be going through the rest of both chassis today. If I find anything else I'll let ya know.
      Q GrandAm 25 | MKII | NNC | Medieval Madness Remake | JNX SuperGun
      First Cab: Centipede (1987)
      Arcade Tech since 1994
    • nem wrote:

      Anyway, I've now fixed the map and the cap list. Did you notice anything else different, @ReplicaX?


      Thanks!
      MS8-25FAR & MS825FBC Caps List are the same as above with the corrected C574 for the Mainboards. My FBC & FAR have a C572 of 47uF 16v. So the Mainboards look good. The FBs, HOTs, and Damper Diodes are the same as well.

      I will be comparing accessory pcbs next between the 2 as well as all other components.
      Q GrandAm 25 | MKII | NNC | Medieval Madness Remake | JNX SuperGun
      First Cab: Centipede (1987)
      Arcade Tech since 1994
    • @ReplicaX

      Well, I wasn't completely wrong. Went through all my three chassis and look what I found:



      C240 (not C574) is a 10uf 16V BP. See how the PCB doesn't have a polar marking.

      This is the chassis where C572 is a 100uf 16V cap.

      Two of my chassis are like this. However, the third one is like yours, where C572 is 47uf 16V. Guess who put the wrong cap in C574? :whistling: I have had some issues with the horizontal width on that monitor, could be related!

      Thanks again for noticing! I'm going to fix the chassis right now.
    • nem wrote:

      @ReplicaX

      Well, I wasn't completely wrong. Went through all my three chassis and look what I found:



      C240 (not C574) is a 10uf 16V BP. See how the PCB doesn't have a polar marking.

      This is the chassis where C572 is a 100uf 16V cap.

      Two of my chassis are like this. However, the third one is like yours, where C572 is 47uf 16V. Guess who put the wrong cap in C574? :whistling: I have had some issues with the horizontal width on that monitor, could be related!

      Thanks again for noticing! I'm going to fix the chassis right now.
      Nice catch! This is exactly why I'm comparing the FBC and FAR I have lol.

      @nem Your 22uF 250v is missing from the list, its on your map though.
      Q GrandAm 25 | MKII | NNC | Medieval Madness Remake | JNX SuperGun
      First Cab: Centipede (1987)
      Arcade Tech since 1994

      The post was edited 1 time, last by ReplicaX ().