[ICOM] Water damage to PW-1, now inop

[Tony Visco]

Larry,

Adam, doesn't this sound like the amplifier section?  At least it does to
me.  At least the cost would be around $500 to $600.

Tony W3EW 

-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Larry Gauthier (K8UT)
Sent: Monday, April 23, 2007 7:30 AM
To: ICOM Reflector
Subject: Re: [ICOM] Water damage to PW-1, now inop

Adam (et al),

Here's an update after another day drying...

To answer your question - the power supply voltage Vd is about 45 volts.

One more observation - not sure how this changes the diagnosis: Switch the 
rig to SSB mode. Key the mic - rig and amp are now in transmit mode. The amp

does not trip to 'protect' state immediately, not until I talk into the mic.

IOW, no fault occurs until RF power passes into the amp.

-larry
K8UT
----- Original Message ----- 
From: "Adam Farson" <farson at shaw.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Sunday, April 22, 2007 19:56
Subject: RE: [ICOM] Water damage to PW-1, now inop


> Tony, Larry,
>
> The flashing band indicator LED denotes "Gain of the final FETs drops."
> (User manual, p. 15.) This denotes a loss of power gain in the PA stage. 
> The
> cause could be a failure in the PSU, damage to the power splitter at the 
> PA
> input, or damage to all MOSFET power devices. Does the Vd scale (Meter 2)
> still read approx. 50V?
>
> Your PW-1 will need to go to the Bellevue WA service centre. I should 
> think
> your home-owner's insurance will cover the repair and shipping costs.
>
> I am very sorry you have to endure this, and hope you get your PW-1 back
> soon, working FB again.
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] 
> On
> Behalf Of Tony Visco
> Sent: Sunday, April 22, 2007 16:33
> To: 'ICOM Reflector'
> Subject: RE: [ICOM] Water damage to PW-1, now inop
>
> Larry,
> It is likely that the individual FET's are now unbalanced or it could be a
> power supply problem.  Adam would know the details.  For my PW-1 FET
> problems meant a trip to Bellevue for repair about a year ago.  Still
> working great. Good luck.
>
> Tony W3EW
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] 
> On
> Behalf Of Larry Gauthier (K8UT)
> Sent: Sunday, April 22, 2007 5:56 PM
> To: ICOM Reflector
> Subject: [ICOM] Water damage to PW-1, now inop
>
> Due to a burst water pipe, water poured into my PW-1 while it was 
> operating!
>
> for a few brief moments (less than a minute) yesterday. I immediately
> removed the cover, dried the components that had gotten wet, and blew a 
> fan
> into the amp for 8 hours to dry any remaining water.
>
> Upon turning on the amp today, all visual indicators seem to be working
> properly - all the normal indicator lamps work, bandswitching works, tuner
> functions, ACC1 connection tracks the band that my 756 is switched to, and
> the fan starts. Everything looks normal UNTIL I switch to transmit mode.
> Then the amp/protect lamps switches to red and the band LED begins 
> blinking.
>
> This failure occurs on every band, regardless whether the tuner is 
> engaged,
> and into a dummy load (perfect SWR).
>
> Any suggestions as to where I should look? Or is it time to pack it into a
> large box and ship it to Icom?
>
> -larry
> K8UT
>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/ 

----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/