On a recent C5 restoration I did, it had a faulty Control Box and, after lots of testing
, I found out diode D1 was bad, the Relay was damaged, the LM358 was fried (IC2) so set about finding replacements (ebay
) for it:
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-replacement-12v-70amp-relay.jpg)
Relay 12V 70Amp
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-replacement-LM358.jpg)
LM358
![](https://www.c5owners.com/documents/images/sinclair-c5/shop/87.jpg)
Diode D1
Here is the control box with everything swapped out and tested, with the original broken Red relay on the left:
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-control-box-new-relay-diode-LM358.jpg)
All back together:
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-control-box-back-together.jpg)
Whenever replacing IC2, the LM358 chip, it's worth putting in a socket first, and then plug the chip into that. Makes it easier in the future if the chip blows again![](/documents/images/emoticons/msp_biggrin.gif)
There you have it, another fixed control box
![](/documents/images/emoticons/msp_sneaky.gif)
![](/documents/images/emoticons/msp_cool.gif)
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-replacement-12v-70amp-relay.jpg)
Relay 12V 70Amp
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-replacement-LM358.jpg)
LM358
![](https://www.c5owners.com/documents/images/sinclair-c5/shop/87.jpg)
Diode D1
Here is the control box with everything swapped out and tested, with the original broken Red relay on the left:
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-control-box-new-relay-diode-LM358.jpg)
All back together:
![](https://www.c5owners.com/documents/images/sinclair-c5/forum/control-box-1/sinclair-c5-control-box-back-together.jpg)
Whenever replacing IC2, the LM358 chip, it's worth putting in a socket first, and then plug the chip into that. Makes it easier in the future if the chip blows again
![](/documents/images/emoticons/msp_biggrin.gif)
There you have it, another fixed control box
![](/documents/images/emoticons/msp_thumbup.gif)
posted on: 25/05/2013 13:47:27