IIGS Monitor Noise Issues [message #319810] |
Tue, 07 June 2016 17:41 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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Hi everyone,
Ill just say the problem I am most worried about now. I just finished installed Twilight on my HD, and was playing around with it, and suddenly a black line went quickly up the screen, followed with a staticy noise. My GS was on for 30 minutes I think. Around that. I felt the top of the monitor and it feels pretty warm. I am assuming this is not normal? The monitor is pretty clean... And the computer I cleaned, so I dont think its that.
Also, when I have a 3.5 System Disk in the drive, and have the disk open, the monitor makes a repeating static noise. Or clicking you could say. Is this normal?
Thank you for your help everyone.
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Re: IIGS Monitor Noise Issues [message #319812 is a reply to message #319810] |
Tue, 07 June 2016 18:37 |
Michael J. Mahon
Messages: 1767 Registered: October 2012
Karma: 0
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Senior Member |
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John A <typewriterguy101@gmail.com> wrote:
> Hi everyone,
>
> Ill just say the problem I am most worried about now. I just finished
> installed Twilight on my HD, and was playing around with it, and suddenly
> a black line went quickly up the screen, followed with a staticy noise.
> My GS was on for 30 minutes I think. Around that. I felt the top of the
> monitor and it feels pretty warm. I am assuming this is not normal? The
> monitor is pretty clean... And the computer I cleaned, so I dont think its that.
>
> Also, when I have a 3.5 System Disk in the drive, and have the disk open,
> the monitor makes a repeating static noise. Or clicking you could say. Is this normal?
>
> Thank you for your help everyone.
>
Sounds like arcing in the area of the flyback transformer.
If you are familiar with CRT monitors, disconnect it and let it sit for a
day, then open the case and carefully discharge the HV anode on the side of
the CRT. Complete the removal from the case and place the uncased monitor
on an insulating surface. Then reconnect it and turn it (and the IIgs) on.
It's helpful if you can darken the room to make the arcing more visible.
If it is in the flyback "cage", observe the location.
Then repeat the disconnection and discharge process. If the area of the arc
is dirty/dusty, clean it with a soft, dry cloth and then coat the area with
a couple layers of glyptol high voltage varnish.
When it's dry (a day or so), reconnect and try it again. The arcing should
be fixed and, if so, the monitor can be disconnected/discharged and
reinstalled in its case.
If the arcing is internal to the CRT or the yoke, the arcing component may
need to be replaced.
--
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
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Re: IIGS Monitor Noise Issues [message #319824 is a reply to message #319812] |
Tue, 07 June 2016 18:49 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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On Tuesday, June 7, 2016 at 6:37:04 PM UTC-4, Michael J. Mahon wrote:
> John A <typewriterguy101@gmail.com> wrote:
>> Hi everyone,
>>
>> Ill just say the problem I am most worried about now. I just finished
>> installed Twilight on my HD, and was playing around with it, and suddenly
>> a black line went quickly up the screen, followed with a staticy noise.
>> My GS was on for 30 minutes I think. Around that. I felt the top of the
>> monitor and it feels pretty warm. I am assuming this is not normal? The
>> monitor is pretty clean... And the computer I cleaned, so I dont think its that.
>>
>> Also, when I have a 3.5 System Disk in the drive, and have the disk open,
>> the monitor makes a repeating static noise. Or clicking you could say. Is this normal?
>>
>> Thank you for your help everyone.
>>
>
> Sounds like arcing in the area of the flyback transformer.
>
> If you are familiar with CRT monitors, disconnect it and let it sit for a
> day, then open the case and carefully discharge the HV anode on the side of
> the CRT. Complete the removal from the case and place the uncased monitor
> on an insulating surface. Then reconnect it and turn it (and the IIgs) on.
> It's helpful if you can darken the room to make the arcing more visible.
>
> If it is in the flyback "cage", observe the location.
>
> Then repeat the disconnection and discharge process. If the area of the arc
> is dirty/dusty, clean it with a soft, dry cloth and then coat the area with
> a couple layers of glyptol high voltage varnish.
>
> When it's dry (a day or so), reconnect and try it again. The arcing should
> be fixed and, if so, the monitor can be disconnected/discharged and
> reinstalled in its case.
>
> If the arcing is internal to the CRT or the yoke, the arcing component may
> need to be replaced.
> --
> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
If I dont do this, will anything happen? Or will it just make those sounds every now and then?
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Re: IIGS Monitor Noise Issues [message #319825 is a reply to message #319824] |
Tue, 07 June 2016 18:59 |
Michael J. Mahon
Messages: 1767 Registered: October 2012
Karma: 0
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Senior Member |
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John A <typewriterguy101@gmail.com> wrote:
> On Tuesday, June 7, 2016 at 6:37:04 PM UTC-4, Michael J. Mahon wrote:
>> John A <typewriterguy101@gmail.com> wrote:
>>> Hi everyone,
>>>
>>> Ill just say the problem I am most worried about now. I just finished
>>> installed Twilight on my HD, and was playing around with it, and suddenly
>>> a black line went quickly up the screen, followed with a staticy noise.
>>> My GS was on for 30 minutes I think. Around that. I felt the top of the
>>> monitor and it feels pretty warm. I am assuming this is not normal? The
>>> monitor is pretty clean... And the computer I cleaned, so I dont think its that.
>>>
>>> Also, when I have a 3.5 System Disk in the drive, and have the disk open,
>>> the monitor makes a repeating static noise. Or clicking you could say. Is this normal?
>>>
>>> Thank you for your help everyone.
>>>
>>
>> Sounds like arcing in the area of the flyback transformer.
>>
>> If you are familiar with CRT monitors, disconnect it and let it sit for a
>> day, then open the case and carefully discharge the HV anode on the side of
>> the CRT. Complete the removal from the case and place the uncased monitor
>> on an insulating surface. Then reconnect it and turn it (and the IIgs) on.
>> It's helpful if you can darken the room to make the arcing more visible.
>>
>> If it is in the flyback "cage", observe the location.
>>
>> Then repeat the disconnection and discharge process. If the area of the arc
>> is dirty/dusty, clean it with a soft, dry cloth and then coat the area with
>> a couple layers of glyptol high voltage varnish.
>>
>> When it's dry (a day or so), reconnect and try it again. The arcing should
>> be fixed and, if so, the monitor can be disconnected/discharged and
>> reinstalled in its case.
>>
>> If the arcing is internal to the CRT or the yoke, the arcing component may
>> need to be replaced.
>> --
>> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
>
> If I dont do this, will anything happen? Or will it just make those
> sounds every now and then?
>
It all depends. ;-)
If the problem doesn't recur, great--no harm, no foul. But if it's arcing
(and not some other noise), it is likely to recur.
If it becomes frequent, it can cause worse problems, like a burned out
flyback winding or horizontal output transistor.
--
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
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Re: IIGS Monitor Noise Issues [message #319826 is a reply to message #319825] |
Tue, 07 June 2016 19:11 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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On Tuesday, June 7, 2016 at 6:59:29 PM UTC-4, Michael J. Mahon wrote:
> John A <typewriterguy101@gmail.com> wrote:
>> On Tuesday, June 7, 2016 at 6:37:04 PM UTC-4, Michael J. Mahon wrote:
>>> John A <typewriterguy101@gmail.com> wrote:
>>>> Hi everyone,
>>>>
>>>> Ill just say the problem I am most worried about now. I just finished
>>>> installed Twilight on my HD, and was playing around with it, and suddenly
>>>> a black line went quickly up the screen, followed with a staticy noise.
>>>> My GS was on for 30 minutes I think. Around that. I felt the top of the
>>>> monitor and it feels pretty warm. I am assuming this is not normal? The
>>>> monitor is pretty clean... And the computer I cleaned, so I dont think its that.
>>>>
>>>> Also, when I have a 3.5 System Disk in the drive, and have the disk open,
>>>> the monitor makes a repeating static noise. Or clicking you could say. Is this normal?
>>>>
>>>> Thank you for your help everyone.
>>>>
>>>
>>> Sounds like arcing in the area of the flyback transformer.
>>>
>>> If you are familiar with CRT monitors, disconnect it and let it sit for a
>>> day, then open the case and carefully discharge the HV anode on the side of
>>> the CRT. Complete the removal from the case and place the uncased monitor
>>> on an insulating surface. Then reconnect it and turn it (and the IIgs) on.
>>> It's helpful if you can darken the room to make the arcing more visible.
>>>
>>> If it is in the flyback "cage", observe the location.
>>>
>>> Then repeat the disconnection and discharge process. If the area of the arc
>>> is dirty/dusty, clean it with a soft, dry cloth and then coat the area with
>>> a couple layers of glyptol high voltage varnish.
>>>
>>> When it's dry (a day or so), reconnect and try it again. The arcing should
>>> be fixed and, if so, the monitor can be disconnected/discharged and
>>> reinstalled in its case.
>>>
>>> If the arcing is internal to the CRT or the yoke, the arcing component may
>>> need to be replaced.
>>> --
>>> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
>>
>> If I dont do this, will anything happen? Or will it just make those
>> sounds every now and then?
>>
>
> It all depends. ;-)
>
> If the problem doesn't recur, great--no harm, no foul. But if it's arcing
> (and not some other noise), it is likely to recur.
>
> If it becomes frequent, it can cause worse problems, like a burned out
> flyback winding or horizontal output transistor.
> --
> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
The big static sound I heard was the first that I heard it. I get the smaller static clicking, as I said, whenever a System Disk is in.
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Re: IIGS Monitor Noise Issues [message #319828 is a reply to message #319824] |
Tue, 07 June 2016 19:45 |
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Originally posted by: Don Bruder
In article <dde851da-a13b-42b4-a84a-45b4a0bb84af@googlegroups.com>,
John A <typewriterguy101@gmail.com> wrote:
> On Tuesday, June 7, 2016 at 6:37:04 PM UTC-4, Michael J. Mahon wrote:
>> John A <typewriterguy101@gmail.com> wrote:
>>> Hi everyone,
>>>
>>> Ill just say the problem I am most worried about now. I just finished
>>> installed Twilight on my HD, and was playing around with it, and suddenly
>>> a black line went quickly up the screen, followed with a staticy noise.
>>> My GS was on for 30 minutes I think. Around that. I felt the top of the
>>> monitor and it feels pretty warm. I am assuming this is not normal? The
>>> monitor is pretty clean... And the computer I cleaned, so I dont think
>>> its that.
>>>
>>> Also, when I have a 3.5 System Disk in the drive, and have the disk open,
>>> the monitor makes a repeating static noise. Or clicking you could say. Is
>>> this normal?
>>>
>>> Thank you for your help everyone.
>>>
>>
>> Sounds like arcing in the area of the flyback transformer.
>>
>> If you are familiar with CRT monitors, disconnect it and let it sit for a
>> day, then open the case and carefully discharge the HV anode on the side of
>> the CRT. Complete the removal from the case and place the uncased monitor
>> on an insulating surface. Then reconnect it and turn it (and the IIgs) on.
>> It's helpful if you can darken the room to make the arcing more visible.
>>
>> If it is in the flyback "cage", observe the location.
>>
>> Then repeat the disconnection and discharge process. If the area of the arc
>> is dirty/dusty, clean it with a soft, dry cloth and then coat the area with
>> a couple layers of glyptol high voltage varnish.
>>
>> When it's dry (a day or so), reconnect and try it again. The arcing should
>> be fixed and, if so, the monitor can be disconnected/discharged and
>> reinstalled in its case.
>>
>> If the arcing is internal to the CRT or the yoke, the arcing component may
>> need to be replaced.
>> --
>> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
>
> If I dont do this, will anything happen? Or will it just make those sounds
> every now and then?
It'll keep working for a while, but it will eventually destroy the
monitor - with the potential (no pun intended) to take the whole house
along with it when it goes. How long is "eventually"? Your guess is as
good as anybody's.
WARNING: Although Mike is correct that it's a fairly simple fix, be
aware that when you go inside a CRT monitor, you're stepping into "one
wrong move can literally kill you" territory - If you're not experienced
with the innards of monitors, you're best off taking it to someone who
is. This isn't just scare-talk - I mean it with total and absolute
sincerity - touching the wrong place inside a monitor can kill you
before you have a chance to realize you're screwing up. Be damned
careful inside any CRT monitor.
--
Brought to you by the letter Q and the number .357
Security provided by Horace S. & Dan W.
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Re: IIGS Monitor Noise Issues [message #319829 is a reply to message #319828] |
Tue, 07 June 2016 20:22 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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On Tuesday, June 7, 2016 at 7:45:46 PM UTC-4, Don Bruder wrote:
> In article <dde851da-a13b-42b4-a84a-45b4a0bb84af@googlegroups.com>,
> John A <typewriterguy101@gmail.com> wrote:
>
>> On Tuesday, June 7, 2016 at 6:37:04 PM UTC-4, Michael J. Mahon wrote:
>>> John A <typewriterguy101@gmail.com> wrote:
>>>> Hi everyone,
>>>>
>>>> Ill just say the problem I am most worried about now. I just finished
>>>> installed Twilight on my HD, and was playing around with it, and suddenly
>>>> a black line went quickly up the screen, followed with a staticy noise.
>>>> My GS was on for 30 minutes I think. Around that. I felt the top of the
>>>> monitor and it feels pretty warm. I am assuming this is not normal? The
>>>> monitor is pretty clean... And the computer I cleaned, so I dont think
>>>> its that.
>>>>
>>>> Also, when I have a 3.5 System Disk in the drive, and have the disk open,
>>>> the monitor makes a repeating static noise. Or clicking you could say. Is
>>>> this normal?
>>>>
>>>> Thank you for your help everyone.
>>>>
>>>
>>> Sounds like arcing in the area of the flyback transformer.
>>>
>>> If you are familiar with CRT monitors, disconnect it and let it sit for a
>>> day, then open the case and carefully discharge the HV anode on the side of
>>> the CRT. Complete the removal from the case and place the uncased monitor
>>> on an insulating surface. Then reconnect it and turn it (and the IIgs) on.
>>> It's helpful if you can darken the room to make the arcing more visible.
>>>
>>> If it is in the flyback "cage", observe the location.
>>>
>>> Then repeat the disconnection and discharge process. If the area of the arc
>>> is dirty/dusty, clean it with a soft, dry cloth and then coat the area with
>>> a couple layers of glyptol high voltage varnish.
>>>
>>> When it's dry (a day or so), reconnect and try it again. The arcing should
>>> be fixed and, if so, the monitor can be disconnected/discharged and
>>> reinstalled in its case.
>>>
>>> If the arcing is internal to the CRT or the yoke, the arcing component may
>>> need to be replaced.
>>> --
>>> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
>>
>> If I dont do this, will anything happen? Or will it just make those sounds
>> every now and then?
>
> It'll keep working for a while, but it will eventually destroy the
> monitor - with the potential (no pun intended) to take the whole house
> along with it when it goes. How long is "eventually"? Your guess is as
> good as anybody's.
>
> WARNING: Although Mike is correct that it's a fairly simple fix, be
> aware that when you go inside a CRT monitor, you're stepping into "one
> wrong move can literally kill you" territory - If you're not experienced
> with the innards of monitors, you're best off taking it to someone who
> is. This isn't just scare-talk - I mean it with total and absolute
> sincerity - touching the wrong place inside a monitor can kill you
> before you have a chance to realize you're screwing up. Be damned
> careful inside any CRT monitor.
>
> --
> Brought to you by the letter Q and the number .357
> Security provided by Horace S. & Dan W.
Don't worry, I know! Cant they be like 10,000 volts or something?
Anyways, If I do not encounter the problem anymore (The louder crack), I should be fine, correct? Also, is there anything I can do WITHOUT taking much apart? Maybe blow the heck out of the monitor through the vent slots with an air compressor? I have a feeling dust is the culprit...
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Re: IIGS Monitor Noise Issues [message #320019 is a reply to message #319829] |
Tue, 07 June 2016 23:42 |
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Originally posted by: Don Bruder
In article <cbabf23b-cc26-4a8c-bc70-d0df446e8063@googlegroups.com>,
John A <typewriterguy101@gmail.com> wrote:
> On Tuesday, June 7, 2016 at 7:45:46 PM UTC-4, Don Bruder wrote:
>> In article <dde851da-a13b-42b4-a84a-45b4a0bb84af@googlegroups.com>,
>> John A <typewriterguy101@gmail.com> wrote:
>>
>>> On Tuesday, June 7, 2016 at 6:37:04 PM UTC-4, Michael J. Mahon wrote:
>>>> John A <typewriterguy101@gmail.com> wrote:
>>>> > Hi everyone,
>>>> >
>>>> > Ill just say the problem I am most worried about now. I just finished
>>>> > installed Twilight on my HD, and was playing around with it, and
>>>> > suddenly
>>>> > a black line went quickly up the screen, followed with a staticy
>>>> > noise.
>>>> > My GS was on for 30 minutes I think. Around that. I felt the top of
>>>> > the
>>>> > monitor and it feels pretty warm. I am assuming this is not normal?
>>>> > The
>>>> > monitor is pretty clean... And the computer I cleaned, so I dont
>>>> > think
>>>> > its that.
>>>> >
>>>> > Also, when I have a 3.5 System Disk in the drive, and have the disk
>>>> > open,
>>>> > the monitor makes a repeating static noise. Or clicking you could
>>>> > say. Is
>>>> > this normal?
>>>> >
>>>> > Thank you for your help everyone.
>>>> >
>>>>
>>>> Sounds like arcing in the area of the flyback transformer.
>>>>
>>>> If you are familiar with CRT monitors, disconnect it and let it sit for
>>>> a
>>>> day, then open the case and carefully discharge the HV anode on the
>>>> side of
>>>> the CRT. Complete the removal from the case and place the uncased
>>>> monitor
>>>> on an insulating surface. Then reconnect it and turn it (and the IIgs)
>>>> on.
>>>> It's helpful if you can darken the room to make the arcing more
>>>> visible.
>>>>
>>>> If it is in the flyback "cage", observe the location.
>>>>
>>>> Then repeat the disconnection and discharge process. If the area of the
>>>> arc
>>>> is dirty/dusty, clean it with a soft, dry cloth and then coat the area
>>>> with
>>>> a couple layers of glyptol high voltage varnish.
>>>>
>>>> When it's dry (a day or so), reconnect and try it again. The arcing
>>>> should
>>>> be fixed and, if so, the monitor can be disconnected/discharged and
>>>> reinstalled in its case.
>>>>
>>>> If the arcing is internal to the CRT or the yoke, the arcing component
>>>> may
>>>> need to be replaced.
>>>> --
>>>> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
>>>
>>> If I dont do this, will anything happen? Or will it just make those
>>> sounds
>>> every now and then?
>>
>> It'll keep working for a while, but it will eventually destroy the
>> monitor - with the potential (no pun intended) to take the whole house
>> along with it when it goes. How long is "eventually"? Your guess is as
>> good as anybody's.
>>
>> WARNING: Although Mike is correct that it's a fairly simple fix, be
>> aware that when you go inside a CRT monitor, you're stepping into "one
>> wrong move can literally kill you" territory - If you're not experienced
>> with the innards of monitors, you're best off taking it to someone who
>> is. This isn't just scare-talk - I mean it with total and absolute
>> sincerity - touching the wrong place inside a monitor can kill you
>> before you have a chance to realize you're screwing up. Be damned
>> careful inside any CRT monitor.
>>
>> --
>> Brought to you by the letter Q and the number .357
>> Security provided by Horace S. & Dan W.
>
> Don't worry, I know! Cant they be like 10,000 volts or something?
I've encountered monochrome tube units that my uncle's (he was in the TV
repair biz years ago - Before TVs became "It broke? Why repair it? It's
cheaper to just pitch it and buy a new one" commodity items) 30K-capable
meter couldn't read without putting the 10x probe into the circuit.
Color units are almost always "hotter" than B&Ws, IME. It also varies by
tube size.
>
> Anyways, If I do not encounter the problem anymore (The louder crack), I
> should be fine, correct?
That really depends on just exactly what it is that went "crack".
> Also, is there anything I can do WITHOUT taking much
> apart? Maybe blow the heck out of the monitor through the vent slots with an
> air compressor? I have a feeling dust is the culprit...
If you try that method, make sure that you've got a good, working
moisture trap on the compressor output - You *REALLY* don't want to be
blasting any liquid in there! :)
--
Brought to you by the letter Q and the number .357
Security provided by Horace S. & Dan W.
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Re: IIGS Monitor Noise Issues [message #320021 is a reply to message #319827] |
Wed, 08 June 2016 15:43 |
Charlie
Messages: 255 Registered: November 2012
Karma: 0
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Senior Member |
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On 6/7/2016 7:16 PM, John A wrote:
> Oh, and forgot to say, the repeating clicking is quiet, while the bigger noise I heard as louder.
My ROM 01 IIgs makes a clicking sound when GSOS 6.0.1 is running. I've
heard that this is normal. It polls the 3.5" disk drive about once per
second and for some reason clicks the speaker.
Charlie
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Re: IIGS Monitor Noise Issues [message #320022 is a reply to message #320021] |
Wed, 08 June 2016 16:53 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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On Wednesday, June 8, 2016 at 3:37:11 PM UTC-4, Charlie wrote:
> On 6/7/2016 7:16 PM, John A wrote:
>> Oh, and forgot to say, the repeating clicking is quiet, while the bigger noise I heard as louder.
>
> My ROM 01 IIgs makes a clicking sound when GSOS 6.0.1 is running. I've
> heard that this is normal. It polls the 3.5" disk drive about once per
> second and for some reason clicks the speaker.
>
> Charlie
Ok, thanks Charlie! Then that means the clicking I was hearing while having it open is normal (Or so we think... :P)
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Re: IIGS Monitor Noise Issues [message #320025 is a reply to message #319812] |
Thu, 09 June 2016 06:50 |
mdj
Messages: 301 Registered: December 2012
Karma: 0
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Senior Member |
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On Wednesday, 8 June 2016 08:37:04 UTC+10, Michael J. Mahon wrote:
> Sounds like arcing in the area of the flyback transformer.
Michael is probably correct, but I'd replace the X2 and Y2 line filter capacitors. The Y2 can produce symptoms similar to what you're describing when they go, and we seem to be at the pointy end of their service life where this is becoming quite a common occurrence.
Matt
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Re: IIGS Monitor Noise Issues [message #320032 is a reply to message #320021] |
Sat, 11 June 2016 12:44 |
thecompu
Messages: 186 Registered: August 2013
Karma: 0
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Senior Member |
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On 2016-06-08 19:43:57 +0000, Charlie said:
> On 6/7/2016 7:16 PM, John A wrote:
>> Oh, and forgot to say, the repeating clicking is quiet, while the
>> bigger noise I heard as louder.
>
> My ROM 01 IIgs makes a clicking sound when GSOS 6.0.1 is running. I've
> heard that this is normal. It polls the 3.5" disk drive about once per
> second and for some reason clicks the speaker.
Hmmm... I remember that too. I don't hear that in my ROM 03 though. Is
that clicking specific to the ROM 01?
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Re: IIGS Monitor Noise Issues [message #320033 is a reply to message #320032] |
Sat, 11 June 2016 13:42 |
Charlie
Messages: 255 Registered: November 2012
Karma: 0
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Senior Member |
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On 6/11/2016 12:44 PM, ultramagnus_tcv wrote:
> On 2016-06-08 19:43:57 +0000, Charlie said:
>
>> On 6/7/2016 7:16 PM, John A wrote:
>>> Oh, and forgot to say, the repeating clicking is quiet, while the
>>> bigger noise I heard as louder.
>>
>> My ROM 01 IIgs makes a clicking sound when GSOS 6.0.1 is running. I've
>> heard that this is normal. It polls the 3.5" disk drive about once per
>> second and for some reason clicks the speaker.
>
> Hmmm... I remember that too. I don't hear that in my ROM 03 though. Is
> that clicking specific to the ROM 01?
>
I don't know. I've never had a ROM 03.
Charlie
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Re: IIGS Monitor Noise Issues [message #320036 is a reply to message #320033] |
Sun, 12 June 2016 16:36 |
Jeff Blakeney
Messages: 125 Registered: September 2013
Karma: 0
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Senior Member |
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On 11/06/2016 1:42 PM, Charlie wrote:
> On 6/11/2016 12:44 PM, ultramagnus_tcv wrote:
>> On 2016-06-08 19:43:57 +0000, Charlie said:
>>
>>> On 6/7/2016 7:16 PM, John A wrote:
>>>> Oh, and forgot to say, the repeating clicking is quiet, while the
>>>> bigger noise I heard as louder.
>>>
>>> My ROM 01 IIgs makes a clicking sound when GSOS 6.0.1 is running. I've
>>> heard that this is normal. It polls the 3.5" disk drive about once per
>>> second and for some reason clicks the speaker.
>>
>> Hmmm... I remember that too. I don't hear that in my ROM 03 though. Is
>> that clicking specific to the ROM 01?
>>
>
> I don't know. I've never had a ROM 03.
The ROM 3 had better trace layout and added better noise cancellation
circuitry to make the sound output cleaner.
Signals on the ROM 1 traces would induce noise onto the sound output of
those machines so you could hear the machine "thinking" and could often
hear a click whenever certainly drives were polled to see if they had
new media in them.
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Re: IIGS Monitor Noise Issues [message #339041 is a reply to message #320036] |
Fri, 10 March 2017 21:05 |
John A
Messages: 32 Registered: June 2016
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Hi everyone,
I am much more experienced now with old Macs and Apples.
This computer will be turned on on display for a few hours next month, so I decided to take er apart and replace the caps.
Boy was I wrong last year, the thing was filled with cobwebs and dust!
Ive ordered the caps needed already, and I guess this will be my first project after a little cap soldering practice on part boards.
I have a hot air station and a new soldering iron thats temp controlled.
I do not see any leaking, however the two big black caps on the AB are slightly bulging. the rest loojk fine but are covered in dust. Either way, since they are near the hot CRT they are all getting replaced! The video board also!
I had to cut that putty to remove the video board. I plan on using hot glue to re secure it. Is that what you guys do?
Anyways, the monitor is laying in pieces. Gonna get a nice retrobrite treatment, cleaning, new caps... oh and the flyback has cracked joints so those are getting new solder. Wish apple made the monitors easier to take apart! Hopefully I can get it back together (Just kidding, I know I will :P)
Anything else I should be checking out? I ordered the caps kit from console5 and also a resistor they said to replace.
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Re: IIGS Monitor Noise Issues [message #339046 is a reply to message #339041] |
Fri, 10 March 2017 23:59 |
Michael J. Mahon
Messages: 1767 Registered: October 2012
Karma: 0
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John A <typewriterguy101@gmail.com> wrote:
> Hi everyone,
>
> I am much more experienced now with old Macs and Apples.
>
> This computer will be turned on on display for a few hours next month, so
> I decided to take er apart and replace the caps.
>
> Boy was I wrong last year, the thing was filled with cobwebs and dust!
>
> Ive ordered the caps needed already, and I guess this will be my first
> project after a little cap soldering practice on part boards.
>
> I have a hot air station and a new soldering iron thats temp controlled.
>
> I do not see any leaking, however the two big black caps on the AB are
> slightly bulging. the rest loojk fine but are covered in dust. Either
> way, since they are near the hot CRT they are all getting replaced! The video board also!
>
> I had to cut that putty to remove the video board. I plan on using hot
> glue to re secure it. Is that what you guys do?
>
> Anyways, the monitor is laying in pieces. Gonna get a nice retrobrite
> treatment, cleaning, new caps... oh and the flyback has cracked joints so
> those are getting new solder. Wish apple made the monitors easier to take
> apart! Hopefully I can get it back together (Just kidding, I know I will :P)
>
> Anything else I should be checking out? I ordered the caps kit from
> console5 and also a resistor they said to replace.
>
Replacing capacitors that show signs of trouble or that are provably the
cause of some malfunction makes perfect sense. As for the others, I've
always been of the mind that "if it ain't broke, don't fix it".
Reworking a PC board always has risks, and if an electrolytic is working
now, it's not likely to fail in the next hundred hours.
--
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
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Re: IIGS Monitor Noise Issues [message #339057 is a reply to message #339046] |
Sat, 11 March 2017 09:02 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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Exactly how I see it. Plus the thing took long enough to get it apart for retrobrite, and Im not going to want to take it all apart next week again if a cap explodes.
Side note: Does anyone still make new flybacks for these or similar types?
On Friday, March 10, 2017 at 11:59:32 PM UTC-5, Michael J. Mahon wrote:
> John A <typewriterguy101@gmail.com> wrote:
>> Hi everyone,
>>
>> I am much more experienced now with old Macs and Apples.
>>
>> This computer will be turned on on display for a few hours next month, so
>> I decided to take er apart and replace the caps.
>>
>> Boy was I wrong last year, the thing was filled with cobwebs and dust!
>>
>> Ive ordered the caps needed already, and I guess this will be my first
>> project after a little cap soldering practice on part boards.
>>
>> I have a hot air station and a new soldering iron thats temp controlled.
>>
>> I do not see any leaking, however the two big black caps on the AB are
>> slightly bulging. the rest loojk fine but are covered in dust. Either
>> way, since they are near the hot CRT they are all getting replaced! The video board also!
>>
>> I had to cut that putty to remove the video board. I plan on using hot
>> glue to re secure it. Is that what you guys do?
>>
>> Anyways, the monitor is laying in pieces. Gonna get a nice retrobrite
>> treatment, cleaning, new caps... oh and the flyback has cracked joints so
>> those are getting new solder. Wish apple made the monitors easier to take
>> apart! Hopefully I can get it back together (Just kidding, I know I will :P)
>>
>> Anything else I should be checking out? I ordered the caps kit from
>> console5 and also a resistor they said to replace.
>>
>
> Replacing capacitors that show signs of trouble or that are provably the
> cause of some malfunction makes perfect sense. As for the others, I've
> always been of the mind that "if it ain't broke, don't fix it".
>
> Reworking a PC board always has risks, and if an electrolytic is working
> now, it's not likely to fail in the next hundred hours.
>
> --
> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
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Re: IIGS Monitor Noise Issues [message #339071 is a reply to message #339057] |
Sat, 11 March 2017 11:30 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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Also, I remember when I had this thing on last year, text was a bit blurry when a smaller font size. I have read that these monitors are not the best for text, but is this normal? How sharp should this be compared to a compact mac? Would I adjust this suing the focus control on the flyback transformer?
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Re: IIGS Monitor Noise Issues [message #339073 is a reply to message #339071] |
Sat, 11 March 2017 12:27 |
Michael J. Mahon
Messages: 1767 Registered: October 2012
Karma: 0
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Senior Member |
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John A <typewriterguy101@gmail.com> wrote:
> Also, I remember when I had this thing on last year, text was a bit
> blurry when a smaller font size. I have read that these monitors are not
> the best for text, but is this normal? How sharp should this be compared
> to a compact mac? Would I adjust this suing the focus control on the flyback transformer?
>
I expect the most significant resolution issue is the pitch of the color
mask in the CRT.
I'm sure someone has experience with focus adjustments on this monitor--I
never needed to.
--
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
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Re: IIGS Monitor Noise Issues [message #339074 is a reply to message #339073] |
Sat, 11 March 2017 12:46 |
John A
Messages: 32 Registered: June 2016
Karma: 0
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Member |
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Yeah Im thinking its just how this monitor is. I did forget even though the resolutions are about the same between a compact and this that this monitor is also 5 inches bigger... So thats makes sense.
On Saturday, March 11, 2017 at 12:27:21 PM UTC-5, Michael J. Mahon wrote:
> John A <typewriterguy101@gmail.com> wrote:
>> Also, I remember when I had this thing on last year, text was a bit
>> blurry when a smaller font size. I have read that these monitors are not
>> the best for text, but is this normal? How sharp should this be compared
>> to a compact mac? Would I adjust this suing the focus control on the flyback transformer?
>>
>
> I expect the most significant resolution issue is the pitch of the color
> mask in the CRT.
>
> I'm sure someone has experience with focus adjustments on this monitor--I
> never needed to.
>
> --
> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
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