| Author |
Message |
    
Jyd
Advanced Member
Username: Jyd
Post Number: 592
Registered: 11-2001
| | Posted on Thursday, March 27, 2008 - 1:45 pm: | 
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my 2990 power supply took a dump,it did not do like others i seen in the past.everyone i ever seen voltage grows to high and causes resisters to burn,mostly on the back side of the display.mine is doing something diffrent.shows 12.80 volts and drops to 6 or 7 volts.would the recifires have anything to do with it? |
Bruce
Senior Member
Username: Bruce
Post Number: 4657
Registered: 9-2003
| | Posted on Thursday, March 27, 2008 - 11:11 pm: |
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check input to the regulator input voltage and the voltage across the filter cap
On 6 since 66
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Jyd
Advanced Member
Username: Jyd
Post Number: 593
Registered: 11-2001
| | Posted on Friday, March 28, 2008 - 8:15 pm: |
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i am just going to do a rebuild,all transisters.the 2 main ones on the back i found a stronger 40volt 40 amp. i got 10 for 20.00. then i will rplace the diode and the small regulators on the board.i heard transformers are usually still good. |
Bruce
Senior Member
Username: Bruce
Post Number: 4662
Registered: 9-2003
| | Posted on Saturday, March 29, 2008 - 12:24 am: |
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Bigger CAN be better .......
On 6 since 66
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Jyd
Advanced Member
Username: Jyd
Post Number: 595
Registered: 11-2001
| | Posted on Saturday, March 29, 2008 - 9:55 am: |
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if it dont work,i bought a new rci2995dx. with no receive for 300.00, its transmits fine no receive.but it new and the power supply is better.they say the 2990 board is made with beter parts.just the power supplys are bad. |
