A500 Plus Problems

Felix · 20 April 2006, 15:56

Hi

I recently aquired a faulty a500 plus all that I can tell is wrong with it is that Capacitor C307 is missing it is located above left of the Paula chip if any one knows what the value of this capacitor is please let me know.

also the battery of the battery backed up clock needs replacing as it has started leaking does anyone know were I can Get the correct replacement?

Yours Felix

coze · 20 April 2006, 16:59

I hope you are not waiting for the replacement. Take that battery out of that amiga ASAP !

BippyM · 20 April 2006, 17:37

Yes I second what cose has said.. REMOVE THAT BATTERY NOW! (Actually I need to remove the battery out of my a500+.. not leaking yet but a matter of time methinks!!)

Something for the weekend

.. when I do it I'll have a look at the require capacitor if you err.. .take a photo and show me EXACTLY where it should be

adgloride · 20 April 2006, 19:59

My first amiga plus broke because I didn't know about the battery leaking. My last amiga plus I just removed the battery and didn't bother with a replacement. The battery leaking may be why the amiga plus doesn't work, if thats the case the amiga will only be good for spare parts.

Felix · 21 April 2006, 20:41

Hi Here is the picture of the capacitor that I think is missing

I have circled the spot in black

and one pic without the circle

Thanks For your help

Felix · 21 April 2006, 20:57

Hi sorry having probs uploading two pics so here is the other pic with the black circule around the capacitor

Overdoc · 26 April 2006, 01:10

I will check my A-500+ board in a few days. Hopefully it is written somewhere on the capacitor as I don't have no capacity measure multimeter....

Chain · 26 April 2006, 11:33

Quote:

Originally Posted by Overdoc

I will check my A-500+ board in a few days. Hopefully it is written somewhere on the capacitor as I don't have no capacity measure multimeter....

C307

Felix · 03 May 2006, 19:09

Hi thanks for your help

I have successfully replaced the battery for the clock which I got from amigakit

Just need the value of the capacitor C307

patrik · 03 May 2006, 20:15

@Felix:

In my A500+ there is a capacitor at C307, which is 10V 1000uF.

Keep in mind though that it is very much possible that your A500+ came without this capacitor as it was deemed unecessary or something like that. Most circuitboards in electronic products have pads for components which arent used through all revisions. All pictures of A500+ motherboards I have seen though have had a capacitor at C307.

A through-hole capacitor is definately nothing that just falls of by mistake without leaving parts of its legs there, so if it really were one there in your A500+ someone must have desoldered it.

Felix · 05 May 2006, 22:50

Thanks for the help

I spotted the missing capacitor because the legs of the capacitor were still pokeing out the motherboard with no bit on the end

I can now order a replacement capacitor from maplin!

Thanks for your help

Felix

BippyM · 07 May 2006, 12:36

Quote:

Originally Posted by patrik

@Felix:
A through-hole capacitor is definately nothing that just falls of by mistake without leaving parts of its legs there, so if it really were one there in your A500+ someone must have desoldered it.

Maybe it blew and the owner decided to remove it to hide the problem before selling...

A blown capacitor is usually caused by another problem.. maybe he removed it and said.. "just replace that capacitor and it'll work a dream"..

or the previous owner might have been trying some sort of modification and killed it?

Just a thought... don't go wasting too much cash replacing bits here and there .. 500+'s are cheap enough

Hopefully that is the problem.. seems odd it was removed then

Toni Wilen · 07 May 2006, 12:53

According to bad quality A500+ schematics C307 seems to be filter capacitor for audio preamp's power supply. Your A500+ should work fine without it (minus possible lower audio quality?)

Solid Snake · 07 May 2006, 20:53

I'm glad I read the post by Bippym. I nearly lost my treasured A500+ 2MB machine. Opened it up after a year and removed the damn leaking battery before it could corrode the pcb! Another month and I probably would of had to bin it. Don't delay, remove that leaking battery today!

Felix · 07 May 2006, 23:39

@ Toni Wilen

Yes it dose work without this capacitor

I brought it as spares and repairs

When I got it it had a faulty 020 acellerator which when removed the amiga works fine
It had a pice of paper informing of a missing capacitor and the battery needed to be replaced becuase it was starting to leak

Eamoe · 18 May 2006, 11:08

Hello, just reading around...

I hear for the first time about the battery leak problem. The battery is IN the A500+, right? If I have an A500 with an A501 expansion, the battery is IN the expansion card, isn't it? I mean, should I worry about this problem if I have an A500 / A600 with RAM expansions (not A500+)?

20 April 2006, 15:56	#1
Felix Music at its Best Join Date: Mar 2006 Location: UK Posts: 42	A500 Plus Problems Hi I recently aquired a faulty a500 plus all that I can tell is wrong with it is that Capacitor C307 is missing it is located above left of the Paula chip if any one knows what the value of this capacitor is please let me know. also the battery of the battery backed up clock needs replacing as it has started leaking does anyone know were I can Get the correct replacement? Yours Felix

21 April 2006, 20:41	#5
Felix Music at its Best Join Date: Mar 2006 Location: UK Posts: 42	Picture Of Capacitor Hi Here is the picture of the capacitor that I think is missing I have circled the spot in black and one pic without the circle Thanks For your help Attached Thumbnails Last edited by Felix; 21 April 2006 at 20:53.

21 April 2006, 20:57	#6
Felix Music at its Best Join Date: Mar 2006 Location: UK Posts: 42	Picture again Hi sorry having probs uploading two pics so here is the other pic with the black circule around the capacitor Attached Thumbnails

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20 April 2006, 16:59	#2
coze hastala vista winny vista Join Date: Feb 2006 Location: mt fuji Age: 46 Posts: 1,335	I hope you are not waiting for the replacement. Take that battery out of that amiga ASAP !

20 April 2006, 17:37	#3
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	Yes I second what cose has said.. REMOVE THAT BATTERY NOW! (Actually I need to remove the battery out of my a500+.. not leaking yet but a matter of time methinks!!) Something for the weekend .. when I do it I'll have a look at the require capacitor if you err.. .take a photo and show me EXACTLY where it should be

20 April 2006, 19:59	#4
adgloride Amiga Mod Chipper Join Date: Jun 2004 Location: UK Age: 51 Posts: 229	My first amiga plus broke because I didn't know about the battery leaking. My last amiga plus I just removed the battery and didn't bother with a replacement. The battery leaking may be why the amiga plus doesn't work, if thats the case the amiga will only be good for spare parts.

26 April 2006, 01:10	#7
Overdoc Commodore Collector Join Date: Aug 2001 Location: Austria Age: 53 Posts: 944	I will check my A-500+ board in a few days. Hopefully it is written somewhere on the capacitor as I don't have no capacity measure multimeter....

03 May 2006, 19:09	#9
Felix Music at its Best Join Date: Mar 2006 Location: UK Posts: 42	Hi thanks for your help I have successfully replaced the battery for the clock which I got from amigakit Just need the value of the capacitor C307

03 May 2006, 20:15	#10
patrik Registered User Join Date: Jan 2005 Location: Umeå Age: 43 Posts: 922	@Felix: In my A500+ there is a capacitor at C307, which is 10V 1000uF. Keep in mind though that it is very much possible that your A500+ came without this capacitor as it was deemed unecessary or something like that. Most circuitboards in electronic products have pads for components which arent used through all revisions. All pictures of A500+ motherboards I have seen though have had a capacitor at C307. A through-hole capacitor is definately nothing that just falls of by mistake without leaving parts of its legs there, so if it really were one there in your A500+ someone must have desoldered it.

05 May 2006, 22:50	#11
Felix Music at its Best Join Date: Mar 2006 Location: UK Posts: 42	Thanks for the help I spotted the missing capacitor because the legs of the capacitor were still pokeing out the motherboard with no bit on the end I can now order a replacement capacitor from maplin! Thanks for your help Felix

07 May 2006, 12:53	#13
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	According to bad quality A500+ schematics C307 seems to be filter capacitor for audio preamp's power supply. Your A500+ should work fine without it (minus possible lower audio quality?)

07 May 2006, 20:53	#14
Solid Snake Wonderful World Of Amiga Join Date: Mar 2006 Location: Manchester, UK Posts: 359	I'm glad I read the post by Bippym. I nearly lost my treasured A500+ 2MB machine. Opened it up after a year and removed the damn leaking battery before it could corrode the pcb! Another month and I probably would of had to bin it. Don't delay, remove that leaking battery today!

07 May 2006, 23:39	#15
Felix Music at its Best Join Date: Mar 2006 Location: UK Posts: 42	@ Toni Wilen Yes it dose work without this capacitor I brought it as spares and repairs When I got it it had a faulty 020 acellerator which when removed the amiga works fine It had a pice of paper informing of a missing capacitor and the battery needed to be replaced becuase it was starting to leak

18 May 2006, 11:08	#16
Eamoe Stunt Car Racer Vet Join Date: Mar 2006 Location: Vevey/Switzerland Age: 43 Posts: 145	Hello, just reading around... I hear for the first time about the battery leak problem. The battery is IN the A500+, right? If I have an A500 with an A501 expansion, the battery is IN the expansion card, isn't it? I mean, should I worry about this problem if I have an A500 / A600 with RAM expansions (not A500+)?

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