Subject: Re: Qbus RL02 controller

From: [email-masked] (PDP11 Hacker .....)
Date: Sun, 3 Oct 1993 17:47:00 GMT

In article <[email-masked]>, [email-masked] (John Rosloot) writes...
>     Does anyone know of companies (preferably in Canada) which repair old
>DEC boards? I have an M8013 RLV11 Disk Control Board which gives solid fault
>lights on all my RL02 drives. Also, is there some fatal incompatibility between
>this board and the Micro PDP 11/73 bus? This board first failed when I tried
>it in the '73. It had been running fine in an 11/23 beforehand. Of course, it
>may have been killed in transit by static or something; I wasn't particularly
>careful with it. I have transferred other devices between the '23 and '73 (a
>QD01 disk controller and an RX02 floppy controller) without problems. Still,
>I want to be sure that I don't get the board repaired only to have it blow up
>when I put it in the '73 again. Any help?

Sorry to post some '11 stuff to the PDP8 newsgroup, but...
The RLV11 is a 2-board set. I have one in my MINC. The boards are M8013 and
M8014 I think, and it matters which order they go in the backplane. Also, the
backplane MUST be one with CD interconnect, not one that will take
twice-as-many dual-height boards. I seem to remember that the 11/73 backplane
does not have CD interconnect.
fault-lights at power-on normally mean that the drives do not have a clock
signal. This comes from the controller. I think that both boards have to be
fitted correctly and the cable the right way round to get the clock signal.
BTW, no matter what other netters tell you, the RLV11 can control RL02's. Mine
does.

>John, no sig
-tony