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Author Topic: Troubleshooting a sick A1200  (Read 3301 times)

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Offline giZmo350

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Re: Troubleshooting a sick A1200
« on: December 19, 2017, 12:13:30 AM »
My A.H. repaired A1200 board (I believe rev 2B) is asses-able top and bottom. Since I have it out, let me take a look... BRB. :)
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A500: 2MB Chip, 8MB Fast, IndiECS, MiniMegi, IDE4ZorroII on Z-500, KS1.3/KS3.1, WB3.1&BWB
 
A2000HD: 2MB Chip, 128MB Fast, P5:Blizz 2060@50MHz, PCD-50B/4GBCF, XSurf100, RapidRoad, IndiECS, Matze RTG, MiniMegi, CD-RW, SunRize AD516, WB3.9
 
A1200: 2MB Chip, 64MB Fast, 4GBCF, GVP Typhoon 030 @40MHz w/FPU, Subway USB, EasyNet Ethernet, Indi AGA MKI, FastATA MK-IV, Internal Slim CD/DVD-RW, WB3.5

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Offline giZmo350

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Re: Troubleshooting a sick A1200
« Reply #1 on: December 19, 2017, 12:28:42 AM »
A cap number is partially covered up on my board after repair but, look on your board... is it just above and to the left of the floppy header? It would be an electrolytic cap.

Nope, never mind. I see on your board it's labeled CN12. Dang it! Lemme keep looking....
« Last Edit: December 19, 2017, 12:33:04 AM by gizmo350 »
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A500: 2MB Chip, 8MB Fast, IndiECS, MiniMegi, IDE4ZorroII on Z-500, KS1.3/KS3.1, WB3.1&BWB
 
A2000HD: 2MB Chip, 128MB Fast, P5:Blizz 2060@50MHz, PCD-50B/4GBCF, XSurf100, RapidRoad, IndiECS, Matze RTG, MiniMegi, CD-RW, SunRize AD516, WB3.9
 
A1200: 2MB Chip, 64MB Fast, 4GBCF, GVP Typhoon 030 @40MHz w/FPU, Subway USB, EasyNet Ethernet, Indi AGA MKI, FastATA MK-IV, Internal Slim CD/DVD-RW, WB3.5

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Offline giZmo350

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Re: Troubleshooting a sick A1200
« Reply #2 on: December 19, 2017, 01:09:25 AM »
Sorry Mike.... I can't find a C412 anywhere... top or bottom. I checked all SMD's & Ceramic's. :(

However (not trying to hijack here), I'm glad I removed my bottom shield and checked there too 'cause I have two blown ceramic caps! C16B and C18A :eek: What the heck do those do? :cry:
 
 Ahhh, I see they are both part of DRAM Decoupling circuit.

Geeeeze! I wish Jens would hurry up and get those reloaded boards out!

BRB..... Ciggy time!
« Last Edit: December 19, 2017, 01:51:12 AM by gizmo350 »
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A500: 2MB Chip, 8MB Fast, IndiECS, MiniMegi, IDE4ZorroII on Z-500, KS1.3/KS3.1, WB3.1&BWB
 
A2000HD: 2MB Chip, 128MB Fast, P5:Blizz 2060@50MHz, PCD-50B/4GBCF, XSurf100, RapidRoad, IndiECS, Matze RTG, MiniMegi, CD-RW, SunRize AD516, WB3.9
 
A1200: 2MB Chip, 64MB Fast, 4GBCF, GVP Typhoon 030 @40MHz w/FPU, Subway USB, EasyNet Ethernet, Indi AGA MKI, FastATA MK-IV, Internal Slim CD/DVD-RW, WB3.5

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Offline giZmo350

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Re: Troubleshooting a sick A1200
« Reply #3 on: December 19, 2017, 01:29:43 AM »
Quote from: jackflash;834210
CN12 is the floppy power connector, label numbers starting with CN are connector numbers

Ahhh, ok. Then the SMD cap next to the floppy connector is C(X)22 (my number is partially covered up from a recap. On Mike's board it looks like C822.
Logged
A500: 2MB Chip, 8MB Fast, IndiECS, MiniMegi, IDE4ZorroII on Z-500, KS1.3/KS3.1, WB3.1&BWB
 
A2000HD: 2MB Chip, 128MB Fast, P5:Blizz 2060@50MHz, PCD-50B/4GBCF, XSurf100, RapidRoad, IndiECS, Matze RTG, MiniMegi, CD-RW, SunRize AD516, WB3.9
 
A1200: 2MB Chip, 64MB Fast, 4GBCF, GVP Typhoon 030 @40MHz w/FPU, Subway USB, EasyNet Ethernet, Indi AGA MKI, FastATA MK-IV, Internal Slim CD/DVD-RW, WB3.5

Surfing The Web With AMIGA Is Fun Again!
 
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