Re: Dead PET 2001

Re: Dead PET 2001

From: Philip Lord <>
Date: Sat, 08 Aug 2009 20:38:49 +0900
Message-id: <>
Firstly, I'm not sure my wiring is correct, so I just want to quickly  

I have three black wires connected to one terminal of the capacitor:
- one grounded to the chassis
- one from terminal 5 of the transformer
- one to pin 3 of the J8 connector

I also have two red wires connected to the other terminal of the  
- one to pin 2 of J8 connector
- one to pin 4 of J8 connector

Is this correct???


On Aug 8, 2009, at 1:40 PM, William Levak wrote:

> On Fri, 7 Aug 2009, Philip Lord wrote:
>> Hi again,
>> Sorry it took me so long to get around to measuring the voltages  
>> off my machine...I hope you are all still here.
>> So here we go (All voltages are approximates):
>> Between the two transformer tabs that go to the monitor - 16VAC
>> Pin1 - 8VAC
>> Pin2 - 0V
>> Pin4 - 0V
>> Pin5 - 8VAC
>> I also took measurements on the 7805's and as they are tied to  
>> pin2, there is no voltage read. 0V.
>> Pin2 and Pin4 both come from the same place off the huge blue  
>> capacitor, so maybe I can assume this is dead?
>> Is there anyway to test this capacitor?
>> Any further advice would be greatly appreciated.
> The capacitor has two terminals; two wires from J8 on one terminal,  
> and one wire from the transformer on the other.
> Disconnect the wire from the transformer.  Measure from that wire to  
> ground.  If it is zero, the transformer is open.  If not, the  
> capacitor is open.
>      Message was sent through the cbm-hackers mailing list

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Received on 2009-08-08 13:54:25

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