jmacz journey

[3lectr1cPPC]

That looks pretty dang good! Very clever.

 

[obsolete]

That looks awesome! Excellent work.

 

[KC13]

Go to a plastic model shop and get a product called micro-set and micro-sol. This will help the decal set better and the sol will help it conform to non-flat surfaces. The are other similar products and the shop owner will be well aware of them. Almost all modellers have this in their arsenal of tools.

 

[LaPorta]

Go to a plastic model shop and get a product called micro-set and micro-sol. This will help the decal set better and the sol will help it conform to non-flat surfaces. The are other similar products and the shop owner will be well aware of them. Almost all modellers have this in their arsenal of tools.

I sure do!

 

[jmacz]

Go to a plastic model shop and get a product called micro-set and micro-sol. This will help the decal set better and the sol will help it conform to non-flat surfaces. The are other similar products and the shop owner will be well aware of them. Almost all modellers have this in their arsenal of tools.

Yup, I used Micro-sol, that's how I got it to wrap on the edges. @LaPorta had suggested it to me a while back in this thread.

 

[bigmessowires]

Still doesn’t see it though…

Off topic, "I can't locate a battery in the right slot" seems like an oddly anthropomorphizing error message. Are there are other examples from the classic Mac OS where the computer refers to itself in the first person?

 

[3lectr1cPPC]

The bottom labels on the iBook Clamshell come to mind here. "i was assembled in China", "my family name is...", something like that.

 

[LaPorta]

Off topic, "I can't locate a battery in the right slot" seems like an oddly anthropomorphizing error message. Are there are other examples from the classic Mac OS where the computer refers to itself in the first person?

My iMac DV SE proudly states underneath “I was assembled in the USA”

 

[jmacz]

Hmm... Applied Engineering Mac SE II Accelerator. 68030 on board as well as memory.

Spent a little more time with this accelerator. Last time I mentioned that the Macintosh SE it came out of works fine with this Applied Engineering TransWarp 1340 Mac SE II Accelerator removed. This is still true and I've gotten this particular Macintosh SE fully working with recapped analog board and PSU (will be recapping the logic board this coming weekend).

But with the accelerator card installed, I get no beep on power up and the following screen:



I have also tried this accelerator card in my other fully working Macintosh SE and it has the same problem (although the display shows a slightly different pattern). So this seems to suggest that the issue is with the accelerator card.

I have tried the following basic debugging steps:

• Memory - swapped out the 4 simms on the accelerator board for known working ones - didn't help.
• Memory Slots - reflowed all the solder joints on each memory slot on the accelerator - didn't help.
• Memory Contacts - cleaned the contacts on each memory module - didn't help.
• PDS Connector on Accelerator - reflowed all the solder joints on the accelerator - didn't help.
• Deoxit on Memory Slots and PDS Connector - used deoxit on the memory slots and PDS connector - didn't help.
• FPU - procured the proper FPU chip for this board and installed it - didn't help.

I have looked over the board and don't see a single suspicious trace. All the chips look great and solder joints look good. Board was already very clean when I got it.

Next thing to try when I find some more time to play with this will be to use a scope and start checking all the signals.

But I think I need to build an extension for the analog board to motherboard cable as the stock cable isn't long enough to place the motherboard on my bench outside of the Macintosh SE.

 

[Daniël]

But I think I need to build an extension for the analog board to motherboard cable as the stock cable isn't long enough to place the motherboard on my bench outside of the Macintosh SE.

A quick hack to make this is to just get an ATX PSU extension cable, and cut down the male end to fit the Mac logic board plug (the rest of the connector hanging off the side would likely collide with the PDS card in this case). As long as you plug in the analog board cable the right way on the female side, it's just fine like that.

 

[jmacz]

A quick hack to make this is to just get an ATX PSU extension cable, and cut down the male end to fit the Mac logic board plug (the rest of the connector hanging off the side would likely collide with the PDS card in this case). As long as you plug in the analog board cable the right way on the female side, it's just fine like that.

Good point! I do have a set of 14 pin molex connectors on the way. But will also try this.

 

[jmacz]

A9M0106 (right) and M0131 (left) 800K floppy drives, lubed, recapped, and with new gears. Both working great.

 

[LaPorta]

Still never seen an M0131 in real life!

 

[lobust]

Still never seen an M0131 in real life!

I used to have one, it came with my SE that I bought second hand when I was around 11 or 12 years old. Although I recently recovered the SE from my mum's attic, I wasn't able to find the drive anywhere.

Sadly, I think at some point in my foolish youth I must have decided it was old and uncool and threw it out

 

[jmacz]

My SE/30

Spent today recapping the analog board and PSU on a second SE/30 and also the SE that I procured recently. Both of those recap jobs were also successes. The SE is working well although I still need to debug the accelerator card. The SE/30 however was known to have issues and I'm still working through those.

Problem #1: random crashes on boot - turned out to be a bad RAM stick. Resolved.

Problem #2: stuck on gray screen on power up with no chime - reseated the ROM. Resolved.

Problem #3: chime on start up is staticky, low volume, and cuts off - haven't debugged yet but I know it's not the speaker as it tested fine using a few other boards.

Problem #4: hang on startup - booting using System 7.5.5, after the Welcome to Macintosh screen it shows the Mac face screen, and then before it gets to showing any CDEV icons on the startup, system hangs. It just gets stuck. Haven't debugged yet.

Gave my SE/30 board a bath in IPA and all the cap gunk is gone. I still am having issues with Problem #3 and Problem #4 above.

RE: Problem #3 : Sound

The speaker itself is fine as I've tried another board with it and with that board, the sound is fine. In particular, on boot, the startup chime is staticky and low in volume. Sounds like an old radio with poor tuning. It doesn't sound slow or fast, just feint and staticky.

I've tested continuity with most of the major chips, capacitors, resistors, inductors that make up the sound circuit including UG12, UE10, UD12, UE12, UB12, UC12, UB11, UB10, C2 capacitor, C4/C6/C5/C3 capacitors, UA9, Q1, Q2. Also checked the power pins on the J11 for -12V, 12V, -5V, 5V. Beeped it out using SE/30 schematics online. The only pin I couldn't check was pin 23 (filter clk) on UE10 as the schematics I found on github is missing content on page 9 which is where this pin is described.

Trying a few more things before pulling chips off the board to check underneath them.

RE: Problem #4 : Boot Hang

Been trying to boot using devices on both the internal and external scsi connector with no success. It's hanging after the Welcome to Macintosh screen, even with extensions disabled using the shift key.

I then decided to not use SCSI but boot with a floppy. That worked! It booted completely and the system was usable. The system version on the SCSI device and on the floppy were different. So it's either the SCSI subsystem or it could be differences in the OS (triggering an issue in the hardware of course).

Based on that, going to start tracing through the SCSI system next.

 

[jmacz]

I then decided to not use SCSI but boot with a floppy. That worked! It booted completely and the system was usable. The system version on the SCSI device and on the floppy were different. So it's either the SCSI subsystem or it could be differences in the OS (triggering an issue in the hardware of course).

Looks like it's something else as it's OS version related.

System 7.5.5 - freeze after Welcome to Macintosh screen (tested via SCSI device).
System 7.1.1 - freeze right before reaching the Finder (tested via Floppy).
System 6.1.8 - boots ok (tested via Floppy).

Some issue with the hardware isn't exposed via 6.1.8 (at least from what I've tested so far) but is exposed during boot on both 7.1.1 and 7.5.5 but at different points during the boot process. Going to test 6.1.8 under a SCSI device tomorrow to rule out the SCSI subsystem.

Also pulled C2, C11, and C6. All of them tested within spec for capacitance and had good resistance.

Listened to chime a bit more... it starts feint and staticky from the get go but the volume fades and then sound cuts out. It's possible the sound is slightly faster than normal but not sure. When booted with 6.1.8, sound is dead by the time it reaches the Finder. Playing with the sound control panel, there's no audio. Need to test the headphone jack to see if it's on the speaker circuit or before it splits into speaker/headphone.

 

[CC_333]

e volume fades and then sound cuts out.

Have you tried cleaning the headphone jack?

Also, how do the solder joints look at the sound ICs? It's possible one of them is faulty or there's an intermittent connection?

c

 

[jmacz]

Have you tried cleaning the headphone jack?

Also, how do the solder joints look at the sound ICs? It's possible one of them is faulty or there's an intermittent connection?

c

I am checking the headphone jack next to see if it works correctly. My issue is with the sound that’s supposed to come out of the speaker.

I reflowed the joints on the ics which didn’t help. If I don’t see anything obvious soon, I will start pulling them off the board to look underneath.

 

[CC_333]

My issue is with the sound that’s supposed to come out of the speaker.

Right, but there's a switch inside the jack that disconnects the speaker when headphones are plugged in. I don't think it's impossible for that switch to get intermittent and cause symptoms similar to what you're describing.

What I'm going on is that when that jack is removed, there will be no sound from the speaker.

c

 

[jmacz]

Right, but there's a switch inside the jack that disconnects the speaker when headphones are plugged in. I don't think it's impossible for that switch to get intermittent and cause symptoms similar to what you're describing.

What I'm going on is that when that jack is removed, there will be no sound from the speaker.

Oh wow, I see. Ok, will check, thanks!!