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#1 2014-06-23 21:10:18

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
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Common issues with the Macintosh SE, (8mhz)

about the only issues i have seen with the Macintosh SE,  (8mhz) so far.     
(Bourns filters for the floppy).
- All disks need to be initialized
- Says your disk needs to be initialized but there isn't one installed
- automatically ejects any disk you insert
- pop a disk in and it take like 3 full minutes for it to display on the screen
- you can read a floppy but cannot write to it.

- the real kicker is this one smile
( this issue makes you think there is something wrong with the SCSI or the HD )
- or something more serious

The Floppy bourns filter goes bad and when you go to boot up the computer
all you get is a blank grey screen with a mouse curser.
and it will just sit there. and do nothing.
( even if there is no floppy inserted. )


Other then that, (C15 has been an issue) on the A/B board.

(floppy drive issues)
- Eject Motor/assm can lock up, needs to be taken off lubed and worked free
- typical floppy drive clean & lube of the mechanics

( Bad HD's )
- Pretty much all vintage mac's have SCSI hd's going bad.

(Mainboard Axel Caps)
Most of the time these do not leak, But if you see any leaking, by all means replace them.

Last edited by uniserver (2014-06-23 21:13:01)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#2 2014-06-23 21:25:40

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

for bourns filter replacements,  I have been using this here… its a resistor network.   
http://www.onlinecomponents.com/dale-md … p=11218616

Apple told me about this replacement, in an indirect way.
They (factory) used this model, in a SE/30 board that came into me one day.

They work fantastic, and are easier to find then the the standard bourns filters apple was using.
— And there is less pins, witch makes them easier to install.

Here is a picture of these resistor networks factory installed by apple.
post-2182-0-94215900-1401240747.jpg

So i have been using this Network replacement with all Macintosh Models!

SE - SE/30 − 128k - 512k - PLUS


If you want pay more money and get the normal Filter/Network Apple mostly used —  here is the link for that.
http://www.ttiinc.com/page/search_advpa … 12780592_0

$1.7 ea

Last edited by uniserver (2014-06-23 21:32:46)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#3 2014-08-23 04:58:50

Scott Baret
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Registered: 2014-05-21
Posts: 181

Re: Common issues with the Macintosh SE, (8mhz)

In regard to the floppies showing up as locked--this is actually a problem with the earlier 1.4MB drives. If you have this problem on an SE, I'm willing to bet it's a SuperDrive/FDHD model.

Look closely at the pin which reads the hole. Check this out by looking directly into the front of the drive. If it's white, you're at risk for developing these issues. I've had this happen on a ton of SEs with SuperDrives.

The easy fix? Pop a drive from a newer Mac with a green pin. These are way more reliable.

If you can, get the drive from a later model Mac (mid-1992 onward). The eject motors are better on these and make a much different sound (it's a little louder).

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#4 2014-08-23 18:15:22

techknight
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Registered: 2014-05-22
Posts: 449

Re: Common issues with the Macintosh SE, (8mhz)

or we could find an equivalent microswitch from digikey, and replace it.

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#5 2015-07-08 10:31:23

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

The 2N3904 also goes bad, On the Se's video board as well,  causing a screwed up screen that looks something like this :
post-1852-0-78008800-1413086771.png


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#6 2015-07-08 22:51:15

bbraun
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Registered: 2014-05-29
Posts: 1,064
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Re: Common issues with the Macintosh SE, (8mhz)

What do people typically use for C15 on the analog board?  It's a 3.9uF 100V electrolytic capacitor, and it seems like the important bit of information is that it's high frequency, recommending non-polar.  Exact replacements don't seem to be readily available from digikey or mouser (or maybe I'm just missing them), but this seems kinda close, although I have no idea if it's actually suitable for a C15 replacement.

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#7 2015-07-08 23:03:36

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#8 2015-07-08 23:08:51

bbraun
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Registered: 2014-05-29
Posts: 1,064
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Re: Common issues with the Macintosh SE, (8mhz)

Cool, thanks.

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#9 2015-07-08 23:15:23

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

no problem buddy!


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#10 2015-11-22 17:57:32

MJ313
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Registered: 2014-09-23
Posts: 498

Re: Common issues with the Macintosh SE, (8mhz)

C15 in an SE/30 is only 35V, but otherwise the same. Would you use that same one, Charles?

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#11 2015-11-24 04:08:50

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#12 2015-11-24 16:53:50

MJ313
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Registered: 2014-09-23
Posts: 498

Re: Common issues with the Macintosh SE, (8mhz)

Thank you, sir

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#13 2016-03-12 10:46:52

Dnal
Member
Registered: 2015-01-03
Posts: 58

Re: Common issues with the Macintosh SE, (8mhz)

So both links to the bournes filters yield "part no longer available.  But here is what I discovered:
http://www.digipart.com/part/MDP1603470G

Last edited by Dnal (2016-03-12 11:01:38)

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#14 2016-05-17 02:04:56

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

you can also just use 1/4 watt 47 ohm resistors…

i bought like 3000  50ohm dale R-packs… been using those bad boys they work good too.   A-b fellas   a-b….


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#15 2016-06-17 03:12:24

CompuNurd
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Registered: 2016-06-14
Posts: 5

Re: Common issues with the Macintosh SE, (8mhz)

Uni, you should make a thread with most of the Compact Macs and other machines and list the common issues starting with the 128k. Of course capacitors are obvious by now, but stuff like the J1 connector on a Plus, sweep circuit on the Mac Classic, and RAM chips on a 128k.

I think people would benefit from this.

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#16 2016-06-17 07:39:34

mcdermd
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From: Corvallis, OR
Registered: 2014-05-12
Posts: 970
Website

Re: Common issues with the Macintosh SE, (8mhz)

Between Uni and TechKnight, I think they've seen them all.


Daily Drivers: 27" iMac 2.8 GHz Quad-Core i7 (Late 2009), 21.5" iMac 2.7GHz Quad-Core i5 (Late 2013), 11" Macbook Air 1.6 GHz i5 (Mid-2011)
See the restored heroes here.

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#17 2016-06-17 15:23:56

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

that is a good idea!!! i should do this.!
Charles


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#18 2016-06-17 15:26:08

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

i am like the Analog board whisperer... i get in some of those most screwed up AB's .. i haven't so far met one i couldn't fix.   the good news is not once, has one of the Xformer's went bad, (not counting flyback) so that is a good thing.  There are quite a few hard parts that can go on these things.... i need to get a napkin an make a list. smile

Last edited by uniserver (2016-06-17 15:28:39)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#19 2016-06-17 16:56:47

LazarusNine
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From: UK
Registered: 2015-03-07
Posts: 68
Website

Re: Common issues with the Macintosh SE, (8mhz)

uniserver wrote:

i am like the Analog board whisperer... i get in some of those most screwed up AB's .. i haven't so far met one i couldn't fix.   the good news is not once, has one of the Xformer's went bad, (not counting flyback) so that is a good thing.  There are quite a few hard parts that can go on these things.... i need to get a napkin an make a list. smile

Yes, please! And then share that napkin with the rest of us - I love a used napkin... roll But honestly, such a list would be really helpful. This thread is already saved in my favourites. smile

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#20 2016-06-26 04:35:55

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Common issues with the Macintosh SE, (8mhz)

Haha sure, you know me...   I always share my tidbits...     My focus is always on the community...

Last edited by uniserver (2016-06-26 04:36:16)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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