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  1. M

    Macintosh SE HD Activity Light Hookup

    ********************************************************************** J U M P E R S ********************************************************************** CONNER CP3040 PRODUCT MANUAL 00501-016 Jumper setting -------------- J2 SCSI Connector Pin...
  2. M

    No video on Power Macintosh 5500 / 27

    looks like someone replaced the flyback with a different type which does not need the connection which has been removed
  3. M

    Macintosh classic with horizontal stripes no chime already recapped

    I have a classic with even more damage from the leaking battery. Removed RTC and sound chip, D1, D2, Y1, C1, C2 to clean beneath and repair a lot of tracks. Tested the board before replacing these components.
  4. M

    Macintosh classic with horizontal stripes no chime already recapped

    You can remove the RTC chip, the classic will start without the chip present (if no other problems exist on the board)
  5. M

    Macintosh Classic won't start

    probably combination analog board I still see capacitor fluid residu from the old capacitors, please clean that you can use pp1 to adjust the 5v/12v voltage , take care, high voltages around!!! adjust the 5V a bit higher, but also measure 12V so that it is not too high logic board probably...
  6. M

    Color Classic : Black screen + no chime + no boot

    did you try resetting the PRAM? Reset PRAM (hold down command-option-P-R while pressing the power button, continue holding these keys down until the computer chimes at least 3 times, then release). could you try booting without the battery present
  7. M

    Color Classic : Black screen + no chime + no boot

    You could check the diodes on the back of the analog board, had a problem once with dp5 or dp8 (iirc ) which caused simliar problem
  8. M

    Classic II bomarc audio schematics

    checklist I used for the audio repair on the classic II rev A board C3 47uF 16V - gnd + R2, R7, R15 C4 47uF 16V - phones switch + pin 5 U1 C5 10uF 16V - gnd + pin 8 U2 (78L08), R21 C6 10uF 16V - gnd + R6 (4k7 to R15) C7 10uF 16V - gnd + pin 7 U11 , R33 C8 10uF 16V - gnd + pin 3 U1 C9...
  9. M

    Classic II bomarc audio schematics

    Can someone confirm the bomarc schematic for the classic II is wrong regarding pin 1 and 2 of the DFAC? wrong version (pin 1 connected to pin 2 and swapped) corrected version Second question where does the via next to C11 go
  10. M

    Finding a replacement for D1 on a first generation Macintosh LC

    picture of the relevant part of my lc board
  11. M

    Finding a replacement for D1 on a first generation Macintosh LC

    looks like A3X diode (NOT 43X H) the H is a date code
  12. M

    SE/30 not functioning: white/blank screen and no startup chime

    Could you show the ram configuration you used for testing? I am also from the Netherlands, maybe I can help if you don't succeed. https://68kmla.org/bb/index.php?threads/who-can-fix-my-se-30s-logic-board-as-service.42242/
  13. M

    Macintosh Plus burnt analog board.

    You could possibly also replace CR22,CR23 and CR25 as they are the same age and wear.
  14. M

    Who can fix my SE/30's logic board as service?

    Offered retrofreak83 to repair the SE/30 board. I am in the Netherlands. He sent me the SE/30 logic board, the package arrived 7 november. Checked the board in one of my systems and got horizontal lines, removed the simm's in bank B, still horizontal lines, cleaned the ROM contacts and got it to...
  15. M

    Classic II - Logicboard Rev. B troubleshooting

    ROMS are not correct in the original post ? 341-0257 341-2061 has to be nearest to the edge
  16. M

    LC III - No video, no sound, and weird schematic

    do you have some progress on this LCIII? happy easter
  17. M

    BlueSCSI naming convention question

    have assembled a number of blue scsi's and tested om SE/30 and LCIII with different HD image files. Works great. Only problem I had was when I got some fake STM32's which would only work at a very low speed. I sent the fake STM32's back.
  18. M

    BlueSCSI naming convention question

    Both should work, depending on the other scsi devices on the chain. boot indeed works in reverse order from the supported systems in the documentation: SE SE's generally work though a small number of users have reported that some NCR chipsets may not work in the SE. What is the problem with...
  19. M

    LC III - No video, no sound, and weird schematic

    maybe you are focussing on the wrong part of the board, the LC III will start without battery, the capacitors you replaced ( C2, C4, C5, C7, C8, C13, C18, C19, C20, C21, C22) , FPU, RAM simm and VRAM extension could you test the board without battery, FPU, RAM simm, VRAM extension could you...
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