KY11-LB behavior question

[Gooijen, Henk]

Again, from (my) memory :-)
If core is installed, the standby position is of no use.
To use the backup battery the 4th "power brick" is an H775 (IIRC)
which is needed for the battery charging/regulation.
If you have core in the machine, the 4th power brick in the power
supply (H765?), is the H754 for core (+20V and -5V).

- Henk.


> -----Original Message-----
> From: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Julian Wolfe
> Sent: woensdag 29 maart 2006 16:27
> To: 'General Discussion: On-Topic and Off-Topic Posts'
> Subject: RE: KY11-LB behavior question
> 
> Okay, it's just that I was testing the switch position just 
> to see what it did, and everything went off including the 
> front panel.  I guess it's supposed to do that.
> 
> I don't know why DEC didn't put a standby LED on the front - 
> you'd think because it's already powering the MOS, you 
> wouldn't care about powering some silly LED. 
> 
> What does that position do if core is installed?
> 
> > -----Original Message-----
> > From: cctalk-bounces at classiccmp.org
> > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Gooijen, Henk
> > Sent: Wednesday, March 29, 2006 12:49 AM
> > To: General Discussion: On-Topic and Off-Topic Posts
> > Subject: RE: KY11-LB behavior question
> > 
> > It's been a long time I had the switch at the Standby position.
> > *IIRC*, everything goes OFF, and only MOS memory is 
> powered, but there 
> > are a few wires on the backplane, where the power leads are 
> soldered, 
> > that connect the backup supply pins to the main supply pins. To use 
> > the memory battery backup, you must remove these wires, but 
> without a 
> > battery and the charger plus a cable to the BA11 power 
> supply, it is 
> > useless.
> > 
> > - Henk.
> > 
> > 
> > > -----Original Message-----
> > > From: cctalk-bounces at classiccmp.org
> > > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Wolfe, Julian
> > > Sent: dinsdag 28 maart 2006 22:52
> > > To: General Discussion: On-Topic and Off-Topic Posts
> > > Subject: KY11-LB behavior question
> > > 
> > > I just have a question about Standby mode on an 11/34.  I 
> read it's 
> > > supposed to leave power applied to MOS, but do the fans 
> and whatnot 
> > > turn off along with the CPU?  Or are they supposed to 
> stay on?  My 
> > > junk's in a BA11-K box.
> > > 
> > > 

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