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

[Ronald Oberloh]

Yes Yaesu repair and service (what service) real sucks.  I sure hope that Motorola can straighten out some of the problems that Yaesu has. 

Ron  

   


--- On Fri, 1/25/08, Mike Schatzberg <cherokeehillfarm at earthlink.net> wrote:

> From: Mike Schatzberg <cherokeehillfarm at earthlink.net>
> Subject: [1000mp] Maintenance and Repair of the Mark V FP-29 PSU
> To: 1000mp at mailman.qth.net
> Date: Friday, January 25, 2008, 8:51 PM
> 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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