 |
|
| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
| Reply |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to sci.electronics.repair
|
|||
|
|||
Repair Electro Industries 3002A PSU after reverse polarity
I carelessly attached a battery with reverse polarity to my Electro
Industries 3002A PSU. I didn't realise until I saw a wisp of smoke after maybe 10 seconds. Needless to say it now does not work correctly. Looking inside the circuit board is populated with easily accessible discrete components that I could probably replace. So question is what is likely to need renewing? I assume active devices such as 2N3055, TIP31C, L7805CV. What about passives eg capacitors, resistors? Appreciate any advice before I condemn to the bin. |
|
#2
Posted to sci.electronics.repair
|
|||
|
|||
|
Repair Electro Industries 3002A PSU after reverse polarity
wrote in message ... I carelessly attached a battery with reverse polarity to my Electro Industries 3002A PSU. I didn't realise until I saw a wisp of smoke after maybe 10 seconds. Needless to say it now does not work correctly. Looking inside the circuit board is populated with easily accessible discrete components that I could probably replace. So question is what is likely to need renewing? I assume active devices such as 2N3055, TIP31C, L7805CV. What about passives eg capacitors, resistors? Appreciate any advice before I condemn to the bin. Check to see if you just smoked a diode on the input. Mike |
|
#3
Posted to sci.electronics.repair
|
|||
|
|||
|
Repair Electro Industries 3002A PSU after reverse polarity
wrote in message ... I carelessly attached a battery with reverse polarity to my Electro Industries 3002A PSU. I didn't realise until I saw a wisp of smoke after maybe 10 seconds. Needless to say it now does not work correctly. Looking inside the circuit board is populated with easily accessible discrete components that I could probably replace. So question is what is likely to need renewing? I assume active devices such as 2N3055, TIP31C, L7805CV. What about passives eg capacitors, resistors? Appreciate any advice before I condemn to the bin. Get your nose right on the circuit board - you should be able to sniff out the burnt component. Gareth. |
|
#4
Posted to sci.electronics.repair
|
|||
|
|||
|
Repair Electro Industries 3002A PSU after reverse polarity
On 25 Feb, 12:48, "Gareth Magennis"
wrote: wrote in message ... I carelessly attached a battery with reverse polarity to my Electro Industries 3002A PSU. I didn't realise until I saw a wisp of smoke after maybe 10 seconds. Needless to say it now does not work correctly. Looking inside the circuit board is populated with easily accessible discrete components that I could probably replace. So question is what is likely to need renewing? I assume active devices such as 2N3055, TIP31C, L7805CV. What about passives eg capacitors, resistors? Appreciate any advice before I condemn to the bin. Get your nose right on the circuit board - you should be able to sniff out the burnt component. Gareth. thanks. Will apply olfactory analysis. Hope repair is a simple as that. |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| batteries in reverse polarity | Home Repair | |||
| Reverse Polarity | Electronic Schematics | |||
| Reverse Polarity | Electronics | |||
| Diode for reverse polarity protection | Electronics Repair | |||
| Reverse Polarity = brick. What fried? | Electronics Repair | |||
Linear Mode
