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

[Ronald Oberloh]

I use a little Astron 25 Amp switcher with no problem and I believe I only paid $75 for it. 

Ron  WA0KDS 

--- On Sat, 1/26/08, Louis Dietrich <n2tu at roadrunner.com> wrote:

> From: Louis Dietrich <n2tu at roadrunner.com>
> Subject: RE: [1000mp] Maintenance and Repair of the Mark V FP-29 PSU
> To: "'All about Yaesu 1000mp'" <1000mp at mailman.qth.net>
> Date: Saturday, January 26, 2008, 9:49 AM
> 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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