On Apr 18, 11:56*pm, Markus Wolfgart wrote:
Dear om Andrew dear om Tom,
many thanks for your prompt replay.
Today before breakfast I start to fiddle out the connections from the
pcb to the parts on it.
I'm not ready yet but probably this evening.
But its true as you noticed that all tree caps are routed to the inner
layer (only three of them) with the pos. pol.
The neighbour of the burned resistor seems to be a coil
(vio/red/green/silver/space/brown) colour marking (72uH? I have to check
the meaning of silver labelling factor 0,1?).
The burned resistor is not directly connected to the destroyed cap but
to one of the others 10u25V or 39u10V.
As you mentioned the OPA labelled as PMI9017 - is this part comparable
to a OP07 (or OP27) ?
I have unfortunately no luck to find any doc in the web but some hints
that PIM parts were manufactured for AD in the 80 years and later on AD
take over this company.
I hope to fine more details this evening.
Many thanks for your help.
I will keep you informed on my progress.
Would be great to reanimate this HP8562B for ham purpose.
vy73 + tnx
Markus
DL8MBY
Am 18.04.2011 12:58, schrieb Markus Wolfgart:
Dear OM's
I'm looking for some help concerning a defective driver pcb for a
yig oscillator inside the mentioned device above.
see link: (http://www.mikrocontroller.net/topic/215840#2149959)
I'm looking for the proper value of the destroyed resistor ( 50 ohm) in
the lower corner as well as for the value of the capacitor.
Have any of you a link to the service schematic of the mentioned driver,
or could send me a copy of it.
Any help would be appreciated.
vy73
Markus
alias
DL8MBY
Yes, the 1826-1149 is an OP-07, and specifically an OP-07EZ. It
appears to still be available from Analog Devices, at least in a
plastic version, and you can get a full data sheet on their web site.
The web site also suggests that OP-27 is similar, the data sheet for
the OP-97 may give you some ideas too, and the OP-07 web page at
Analog Devices suggests the AD8677 as a replacement. In short, it
should not be difficult to find both data for the OP-07 and a suitable
replacement should that be necessary. And yes, Analog Devices
acquired PMI many years ago, but carries on the "OP" line of parts
today.
Cheers,
Tom