help me saving my SE/30

[Marsupilami]

Hi,
I need your help to save a good old SE/30 found in a garage.

Here's the story :
First switch on : garbage screen but the "bong".
So i tried to clean and health it.

The opening :


A lot of dust..
the quantum disk is there and spinning but does not seems to work.


There is some rust on the SCSI connector.





Before cleaning.

The C13 seems to be the only one to leak.

The floppy needs also a good cleaning and some grease.

Let's clean it :


Now it's clean, i need to recap it :

Finally, it was hard (my first recap ever), but i made it.


To sum-up:

- I repaired the floppy, the keyboard, the mouse

- Recapped the motherboard
- Patiently cleaned the other things with a soft brush.
- Removed the HD.

Si it should work...here's what i have :



Of course it's better than before but...
1 - I still have some vertical lines...Why ?
2 - The screen is strange, see on the left. There is no way to fix that with the screen settings /screws on the left panel.

Do you have any ideas ?

If i use the button near the reset one, i have this :


Could it be a problem with the kind of horizontal rusty thing ?


Thanks for your help ! (and sorry for my english, it's not my native language).

 

[tanaquil]

Have you followed all the instructions in Larry Pina's book (widely linked on these forums) for adjusting the video after making changes? That weird looking screen looks to me like what you get when you turn the cutoff up all the way. The goal is to turn the brightness up to max, turn the cutoff up to max, and then turn the cutoff down until those lines have just disappeared, leaving a normal display.

Even before that, you should check that the voltage is adjusted correctly. If the voltage is off, all the other adjustments will have to be redone anyway.

But you mention that adjusting the dials on the left didn't help, so maybe there is a larger problem (most likely on the analog board).

In general, Pina is very helpful in laying out the steps to be taken in order to check the health of a set. Although he focuses on the Plus and SE, a lot of the material still applies to the SE/30 (which has an analog board identical to the SE, if I remember correctly).

The "horizontal rusty thing" looks like a healthy flyback transformer to me, though other eyes more expert than mine may see things I can't.

The button next to the reset button is the programmer's switch. I vaguely remember playing with it on my Classic and getting something like that, so that might be the normal function, but I never understood how the programmer's switch worked and learned to leave it alone.

Good luck, you've come so far already!

 

[Juliet Elysa]

Yes, that is what normally happens when the programmer's switch is pressed during startup. If you press the button before the monitor comes on you will get the chimes of death on Macs that have them, and the display will not work until you restart without pressing the button. If you press the button after the display comes on but before the Welcome to Macintosh screen appears, mainly when the Happy Mac is on the screen, you will get both the chimes of death and the Sad Mac. This is what happens on my Performa 635CD, I haven't tried on my Plus since I couldn't get the dang switch installed.  From what I read a very long time ago (I don't remember the source) pressing the programmer's switch, also known as the "interrupt button", sends an interrupt to the processor. Normally that interrupt brings up a dialog box with a command prompt, like DOS and the Apple II has, that lets you type in debugging commands. My theory is that when the Happy Mac is on the screen the part that responds to the interrupt hasn't loaded yet, so the Mac gets confused and puts up a Sad Mac instead of the dialog box.

As a random comment, you appear to have gotten a different code than the one I always get on my Performa when I use the switch. I always get 0000000F 0000000D.

 

[rickrob]

The vertical lines are most likely an open trace to IC UE8. You'll need a meter to check continuity.

Check the traces from UE8 to UC6 and UC7.  Specifically VID0 to VID7

 

[Marsupilami]

Wov nice, i knew this forum was the place to be

Thanks @tanaquil for the Pina book, i was using the "Classic Mac Repair Notes" but not this one.

I also tried your tips to adjust the brightness and it's better indeed, now it look like this :



But i still have a kind of overlaping effect on the left.

I will chek voltage adjustment as well.

Thanks @Juliet Elysa for your explanations about the programmer's switch.

Thanks @rickrob for the schematics, i will try to test continuity.

At this stage i know that i have probably 2 problems : One with a UE8 and another with the analog board / voltage.

That's a good starting point.

Nothing is better than experts !

"I'll be back !"