| Author |
Message |
    
Wyatt_earp
Junior Member
Username: Wyatt_earp
Post Number: 43
Registered: 8-2002
| | Posted on Sunday, October 02, 2005 - 4:29 am: | 
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I have a Pyramid PS-15K PS and lately whenever I hook anything to it, it goes into "Protection" mode. Someone told me that something happened inside and it has reveresed polarity. What went wrong and can it be repaired? |
Ranger87black
New member
Username: Ranger87black
Post Number: 2
Registered: 12-2005
| | Posted on Wednesday, April 05, 2006 - 4:06 pm: |
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Hello Wyatt_earp, If you ever find out how to fix that power suplly can you please let me know. I have the same problem. Thanks |
Tech237
Moderator
Username: Tech237
Post Number: 263
Registered: 4-2004
| | Posted on Wednesday, April 05, 2006 - 7:00 pm: |
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I wont say it cannot or does not happen but in 30 years in radio I have yet to see any power supply reverse polarity.
What happens if you hook a 12v light bulb to the supply? Does it still go into Protection Mode??
What is the actual voltage and current the supply is trying to put out- both with and without a load? That is does it actually put out 13vDC? Is the polarity at the terminals correct? |
Pogo12
Member
Username: Pogo12
Post Number: 90
Registered: 3-2005
| | Posted on Saturday, October 21, 2006 - 5:30 pm: |
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Theres a ic chip called a IC-723 if I remember right that tends to go out in these power supplys.Replace that.You can get one from radio shack. |
Ranger87black
Junior Member
Username: Ranger87black
Post Number: 38
Registered: 12-2005
| | Posted on Monday, April 16, 2007 - 10:23 am: |
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I finaly took out that power supply and replaced the transistors on the back of the unit.The transistors go for $1.75 each.Cheap fix after I figured it out. |
