Thread
Need help pointing to strange video problem on SE/30
I'm Not aware of diagnostic mode?
oh wow ...
I would assume then you get a dump to the serial port?
Techknight do you have one of Dougg3's rom simms?
I would assume then you get a dump to the serial port?
Techknight do you have one of Dougg3's rom simms?
Diagnostic mode
There's also a way to enter diagnostic mode via SCSI, I just haven't gotten to looking at that yet.
There's also a way to enter diagnostic mode via SCSI, I just haven't gotten to looking at that yet.
That makes life easier....
Hi,
as requested, this may be of interest to people troubleshooting SE/30 SCSI issues.
Wires ran to replace rotten VIAs.
as requested, this may be of interest to people troubleshooting SE/30 SCSI issues.
Wires ran to replace rotten VIAs.
Boom, thanks! I just fixed a SCSI issue with your picture genie!
you are the man. :approve:
I am telling you guys… most of these se/30's go bad in the SAME WAY.
awesome!
you are the man. :approve:
I am telling you guys… most of these se/30's go bad in the SAME WAY.
awesome!
Good stuff! Have you actually kept track of the number of SE/30's that you have fixed? Would be cool to know. Must be a lot of them now 
Yes so far at-least 5 se/30s have been shot gun diagnosed / fixed that I know of. either directly by me or indirectly from me sending links to your pictures!
Saves time buddy!!
Ones I have actually fixed with schematics and meter and wasting hours and hours. I have lost count by now many many
Recapped at least around 60+ just SE30's by now with about 65 to 70 % being fixed just from a good wash and new caps, And the rest 30 to 35 % needed additional bench work, and I would say out of all that there has been only about 6 boards total I could not fix, 4 of those are what I'm sending you 1 went back to customer an probably ended up on the wall , the other was cc333s parts board on my floor lol, I have rescued like 5 boards from the parts of that, Adb fuse/ Adb filter / network filter / ue8 / scsi chip! I used the swim from it too but turned out it wasn't bad.
Total Mac boards? Wow no clue tons!
Se/30 boards seems to me, most likely to need more then caps, when sent in for a recap!
Saves time buddy!!
Ones I have actually fixed with schematics and meter and wasting hours and hours. I have lost count by now many many
Recapped at least around 60+ just SE30's by now with about 65 to 70 % being fixed just from a good wash and new caps, And the rest 30 to 35 % needed additional bench work, and I would say out of all that there has been only about 6 boards total I could not fix, 4 of those are what I'm sending you
1 went back to customer an probably ended up on the wall , the other was cc333s parts board on my floor lol, I have rescued like 5 boards from the parts of that, Adb fuse/ Adb filter / network filter / ue8 / scsi chip! I used the swim from it too but turned out it wasn't bad.Total Mac boards? Wow no clue tons!
Se/30 boards seems to me, most likely to need more then caps, when sent in for a recap!
I'm glad my board has been useful to you!
It was a shame when I botched the ROM and RAM SIMM slots; it worked okay before...
Oh, well, it worked out...
c
hey here is an interesting one. no bong, nothing just this.
anyone have a shot gun fix for this?
[attachment=0]Screen Shot 2014-01-20 at 4.54.28 AM.png[/attachment]
anyone have a shot gun fix for this?
[attachment=0]Screen Shot 2014-01-20 at 4.54.28 AM.png[/attachment]
Probably a problem linked to the SIMM Rom or RAM. try cleaning the sockets (had the same problem yesterday and cleaning both worked for me)
Typical Simasimac problem.
Typical Simasimac problem.
√ (1) Check and clean connections between SIMMs (ROM-SIMM) and SIMM (ROM-SIMM) slots, and restart.
√ (2) Remove PDS card(s) such as an accelerator card if installed, and restart.
√ (3) Check the battery. Replace it with a new one if voltage is low, and restart.
√ (4) Replace electrolytic capacitors C6 (1µF 50V) and C7 (47µF 16V) on the logic board with new ones. Surface mount chip type capacitors are soldered on the original logic board. But you can use miniature radial lead type capacitors instead.
Anyway, be carefull about desoldering and soldering procedures not to break circuit patterns on the board. Make sure the polarity of electrolytic capacitors before soldering.
If you find liquid leak or corrosion of other capacitors, it is a good idea to replace them or all electrolytic capacitors with new ones. Macintosh SE/30 was introduced in 1989 and discotinued in 1991. Electrolytic capacitors have been degraded after years.
? (5) If solution (4) doesn't work, pull up the sound IC chip (UB11). You can see letters "SONY 0F09G 3430045B APPLE85" or "SONY 9A04 3430045B APPLE85" printed on the chip. To pull up the IC chip, connect pin 7 to pin 15 of the chip with a 1 kilo ohm resistor.
√ (6) If solution (5) doesn't work either, replace the network filter RP2 (Bourns 4120R-601-250/201).
no dice.
not sure what #5 would do… but already tried 1,2,3,4,6 before posting.
√ (2) Remove PDS card(s) such as an accelerator card if installed, and restart.
√ (3) Check the battery. Replace it with a new one if voltage is low, and restart.
√ (4) Replace electrolytic capacitors C6 (1µF 50V) and C7 (47µF 16V) on the logic board with new ones. Surface mount chip type capacitors are soldered on the original logic board. But you can use miniature radial lead type capacitors instead.
Anyway, be carefull about desoldering and soldering procedures not to break circuit patterns on the board. Make sure the polarity of electrolytic capacitors before soldering.
If you find liquid leak or corrosion of other capacitors, it is a good idea to replace them or all electrolytic capacitors with new ones. Macintosh SE/30 was introduced in 1989 and discotinued in 1991. Electrolytic capacitors have been degraded after years.
? (5) If solution (4) doesn't work, pull up the sound IC chip (UB11). You can see letters "SONY 0F09G 3430045B APPLE85" or "SONY 9A04 3430045B APPLE85" printed on the chip. To pull up the IC chip, connect pin 7 to pin 15 of the chip with a 1 kilo ohm resistor.
√ (6) If solution (5) doesn't work either, replace the network filter RP2 (Bourns 4120R-601-250/201).
no dice.
not sure what #5 would do… but already tried 1,2,3,4,6 before posting.
Thats what jdw's board does that I have here. I checked all circuits between rom/ram and processor.
I didnt remove the coprocessor
I didnt remove the coprocessor
lol did you every try this?
? (5) If solution (4) doesn't work, pull up the sound IC chip (UB11). You can see letters "SONY 0F09G 3430045B APPLE85" or "SONY 9A04 3430045B APPLE85" printed on the chip. To pull up the IC chip, connect pin 7 to pin 15 of the chip with a 1 kilo ohm resistor.
i never tried this… maybe i will give it a shot and see what happens..
? (5) If solution (4) doesn't work, pull up the sound IC chip (UB11). You can see letters "SONY 0F09G 3430045B APPLE85" or "SONY 9A04 3430045B APPLE85" printed on the chip. To pull up the IC chip, connect pin 7 to pin 15 of the chip with a 1 kilo ohm resistor.
i never tried this… maybe i will give it a shot and see what happens..
I dont think I did. But all that chip does is control RESET management to the CPU, etc...
Well, if you have headphones plugged in. If you press reset, and hear a slight "pip" then the sound IC needs no attention, and also tells you that the RESET function works.
Thats what I did, and that was ok. That also tells me that the ROM was getting far enough to setup sound hardware before taking a nosedive.
Well, if you have headphones plugged in. If you press reset, and hear a slight "pip" then the sound IC needs no attention, and also tells you that the RESET function works.
Thats what I did, and that was ok. That also tells me that the ROM was getting far enough to setup sound hardware before taking a nosedive.
The horizontal lines don't look like a video system problem to me, if it were vertical lines, it would be easier to figure out!
Those SE/30's never cease to amaze with the type of problems you get. A new one every week
PS: does anyone know what the 16Mhz clock signal on the SE/30 is supposed to look like? I assume it would be a nice square wave, but that's not what I'm getting on a faulty board. Can't check against a good board at the moment.
Those SE/30's never cease to amaze with the type of problems you get. A new one every week
PS: does anyone know what the 16Mhz clock signal on the SE/30 is supposed to look like? I assume it would be a nice square wave, but that's not what I'm getting on a faulty board. Can't check against a good board at the moment.
hey that is kind of a good find.
considering the oscillator is right there next to the power header and a line of leaking cap goo!
i never thought to look at the clock on an scope
and if i did lol i probably would have just checked the clock right at the oscillator.
considering the oscillator is right there next to the power header and a line of leaking cap goo!
i never thought to look at the clock on an scope
and if i did lol i probably would have just checked the clock right at the oscillator.
Yeah I checked there too
Further down the line I'm still getting the same sine wave though...I hope it's not my cheapo scope
It is supposed to be a sine wave, surprisingly.
If you didnt have an oscillator you would have no CRT output at all.
If you didnt have an oscillator you would have no CRT output at all.
Really? That's really unusual! But at least I know now that the clock signal is not the problem...nice sine wave at all the chips that need a clock. Had a look at the M68000 datasheet and it specifies CLK as requiring a nice square wave. I wonder how they're getting away with a sine wave, especially as the amplitude is rather low..not much of the wave would be at defined logic high levels. Are there Schmitt triggers inside the chips?
Every oscillator IC i have seen, puts out a sinewave, or sometimes a really dirty square wave.
As long as your logic circuitry has some sort of hysteresis-shaping tolerant input, (CMOS/TTL different) then waveshape isnt going to matter as it will be a bang-bang style clock interpretation anyway.
or use a schmitt trigger circuit, it usually isnt an issue.
As long as your logic circuitry has some sort of hysteresis-shaping tolerant input, (CMOS/TTL different) then waveshape isnt going to matter as it will be a bang-bang style clock interpretation anyway.
or use a schmitt trigger circuit, it usually isnt an issue.
With horizontal lines and no bong, i think you can rule out the video-circuit. Vertical lines or bars would indicate VRAM or V-adress problems.
Did you replace the RAM?
Did you replace the RAM?