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05 October 2023, 21:52
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#1 |
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Registered User
Join Date: May 2017
Location: AmigaLand
Posts: 459
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8371 and 8372
Hi,
Amiga 500 motherboard rev5 (not 6 as already written) I changed a Fat Agnus 8371 by a 8372. I got a dark screen. Are 8371 and 8372 interchangeable ? |
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05 October 2023, 22:10
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#2 |
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Senior Member
Join Date: Jun 2001
Location: Germany
Posts: 1,666
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Had to look it up. You must isolate pin 41 of the 8372 so it does not make contact. The 8372 uses that for PAL/NTSC selection, but it is grounded on your rev.5, so it would force the 8372 to start in NTSC mode (which is not going to work).
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05 October 2023, 22:17
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#3 |
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Registered User
Join Date: May 2017
Location: AmigaLand
Posts: 459
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Thank you for your enlightenment.
I think I will buy a 8371 instead as I'm not good at electronics. |
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05 October 2023, 22:21
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#4 |
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Registered User
Join Date: May 2017
Location: AmigaLand
Posts: 459
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By the way, what does mean the white dot (is it glue ?) in the corner of the chip ?
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05 October 2023, 23:12
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#5 | |
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Registered User
Join Date: Feb 2015
Location: Sweden
Age: 50
Posts: 2,974
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8371 and 8372
Quote:
Howdy, when I did this mod years ago, I simply used some tape to cover the pin, works fine ;-) https://www.exretro.com/galleries/co..._01-2000w.webp |
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06 October 2023, 09:55
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#6 | |
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Registered User
Join Date: May 2017
Location: AmigaLand
Posts: 459
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Quote:
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12 October 2023, 13:42
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#7 |
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Registered User
Join Date: Feb 2023
Location: Sv.nedelja/Croatia
Posts: 71
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Or you simply pull a toothpick betven the leg and the socket pin ...
And break it (cut) with cutter pliers .... up the socket ... |
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12 October 2023, 15:38
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#8 |
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Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,448
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Yes just bend the pin outwards. If it snaps off no big deal as long as it is the right pin
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12 October 2023, 21:12
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#9 |
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Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,869
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Instead Agnus i would bend PLCC socket pin instead - it is way easier to buy PLCC socket than Agnus.
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12 October 2023, 23:09
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#10 |
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Registered User
Join Date: Feb 2015
Location: Sweden
Age: 50
Posts: 2,974
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My tape solution has worked for years, no bent pins needed ;-)
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13 October 2023, 00:07
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#11 | |
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Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,869
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Quote:
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