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 2.GQ Geiger Muller Counter
 gmc-320 Plus V.4		  New Topic  Reply to Topic
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HenryJP

Canada
2 Posts
Posted - 04/10/2022 :  12:41:19  Show Profile  Reply with Quote
I accidently installed a fully charged battery in reverse. There was a smoke cloud in about 1 second. I disconnected the battery immediately, but the damage was done. It now doesn't see the battery, but works fine with the usb connector only. After a quick inspection ,I saw that a component on the board is fried. Its called "U7". A 5 PIn chip. I suspect its a chip regulator. Does anyone know what its value is, or if possible a work around, or know where I can get a schematic. (with values)
regards,
HenryJP
Reply #1

Damien68

France
780 Posts
Posted - 04/11/2022 :  06:08:43  Show Profile  Reply with Quote
you can read the marking on the chip and googling it
it look like LTC4054ES5-4.2
Mastery is acquired by studying, with it everything becomes simple
Edited by - Damien68 on 04/11/2022 22:06:37
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Reply #2

EmfDev

2250 Posts
Posted - 04/11/2022 :  10:06:15  Show Profile  Reply with Quote
Hi HenryJP, when did you buy this one and do you have an order number? Please send your order number and address to mark@gqelectronicsllc.com. We can send you one.
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