[1000mp] Maintenance and Repair of the Mark V FP-29 PSU

[Rob Atkinson]

hal,

what did you pay for the two astron supplies?  or rather, what do they  
sell for?  tnx

73


rob / k5uj


On Saturday, January 26, 2008, at 09:53  AM, Harold Mandel wrote:

> I use two Astrons and they work just fine.
>
> The 28 volt supply will swing up to 32 volts, so 30 volts
> is no problem.
>
> Hal
>
> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net  
> [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Louis Dietrich
> Sent: Saturday, January 26, 2008 10:50 AM
> To: 'All about Yaesu 1000mp'
> Subject: RE: [1000mp] Maintenance and Repair of the Mark V FP-29 PSU
>
> Gerry...
>
> A power supply for $800!.....aren't there alternatives to using the  
> Yaesu supply?....I thought Astron makes a 30V (28V?) supply...
>
> Is there anyone out there using an alternative to the FP29?
>
> I'm just amazed that anyone would charge (and pay) $800 for a power  
> supply....
>
> 73...
>
> Lou N2TU
>
> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net  
> [mailto:1000mp-bounces at mailman.qth.net]
> On Behalf Of w8gf
> Sent: Saturday, January 26, 2008 10:28 AM
> To: 1000mp at mailman.qth.net
> Subject: Re: [1000mp] Maintenance and Repair of the Mark V FP-29 PSU
>
> Andy:  What are the part numbers of the ICs replaced in your FP-29?
> Mine went South a few months back and I am still trying to figure out  
> what went wrong.  A replacement  unit cost me nearly $800.00!
>
> 73, Gerry (W8GF)
>
>
>
> -----Original Message-----
> From: Mike Schatzberg <cherokeehillfarm at earthlink.net>
> To: 1000mp at mailman.qth.net
> Sent: Fri, 25 Jan 2008 9:51 pm
> Subject: [1000mp] Maintenance and Repair of the Mark V FP-29 PSU
>
>
>
> Hello 1000MP Fans:
>
> I received the email below today, from Andy, G7LRR, regarding his  
> experience with the Mark V outboard power supply.
> You may want to update your maintenance practice after reading it.
>
> 73 and Happy DXing,
>
> Mike
> W2AJI
>
>
> The PSU on the MKV went bang and it was looking like a new unit was  
> needed at a cost of £495.00 around $700.00.
> Lucky I had friends in the trade that was helpful, as Yaesu UK wanted  
> £100.00 just to look at it,
>
> In the FP-29 PSU it uses 2 voltages 30volts @ 15 amps and 13.8 @ 5  
> amps.
> With this design it gets very hot and yaesu in their wisdom placed the  
> cooling fan at the bottom of the unit ¼ inch above this is the CAPS  
> and transformer around this point is about 600volts DC.
>
> This collects dust like you would not believe, I had a like a cat get  
> a fluff ball in it which shorted across the caps and diodes solder  
> points and taking out 2 main IC.
>
> These are what I call Black box units having no part numbers nor info  
> in the drawing from yaesu and made for yaesu only.
>
> These 2 IC alone cost £150.00 around 275 dollars only so they say from  
> yaesu.
>
> The IC, s are mounted on a board and cover in black resin making it  
> hard to fault find and also to see what  the thing does in line.
>
> I had a guy chip all the resin off the IC's and clean them with acid  
> to find that the parts are £1.50  $2.00 each cheap as chips really.
>
> Yaesu are making loads of money by doing this and repairing at silly  
> rates.
>
> Anyway with that said total cost was £45.00 around $75.00.
>
> So all you guys on Mkv with a External PSU take that cover off and  
> blow it out with a air bush and get some lacquerer and spay the bottom  
> of the PCB this will stop dust making a short and costing you loads.
>
>
> Cheers All
>
> Andy
>
> G7LRR
>
>
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