opening the drive door/lid of an RM03 ?

[Mike Ross]

Strange. Here's one of mine. No lid issues!

https://www.youtube.com/watch?v=xcc5fJOgp7A

Mike

On Sun, Jan 24, 2016 at 10:47 AM, Henk Gooijen <henk.gooijen at hotmail.com> wrote:
> Hello readers,
> I cleaned the first of my RM03 drives today. The drive is quite clean
> even after several years of no attention. Just a few spiders webs and
> tiny dead spiders, and little dust.  I picked up this drive in Turin
> Italy, together with Edward several years ago. I cannot remember doing
> it, but the head lock pin was in the lock position.
> After cleaning and a good inspection (I found a small metal bracket
> piece next to the PSU output plugs, and have not found where it came
> from!), I mounted a mains power plug to the drive cable. Massbus cable
> is attached to the drive, the other end is not connected to anything.
> After setting all circuit breakers ON (two inside the drive, two at the
> rear side next to the running hours counter), I plugged the mains in
> and switched mains on. I hear humming of the fans, so it seems OK.
>
> However, this is my problem: the door latch stays locked, I cannot open
> the lid. I want to open the lid to clean the inside of the drive bay.
> After some reading (EK-RM023-TD-001_RM02_03_Tech_May78.pdf), I found
> this in chapter 4.4 (page 4-7):
>
> The initialize sequence starts with the receipt of a Massbus INIT
> signal from either port A or B. This sequence is used to condition both
> the adapter and drive circuits to a known reset state. The functional
> block diagram for the initialize command is shown in Figure 4-5.
> The Massbus INIT signal (whether coming from port A or B) clears the
> AT A bit in the attention summary register in the IF module. In the CS
> module, it is converted to the MBA clear signal which performs the
> following:
> 1. Clears the enable search latch
> 2. Sets the on latch
> 3. etc.
>
> So, do I understand this correctly that without an initial Massbus INIT
> signal the lid remains locked?  Or has this RM03 drive a "lock issue"?
> If somebody has an RM03 drive, is it possible to open the lid without
> Massbus cables hooked to the RH70 or RH11 controller?  Is that Massbus
> connection required + INIT command to unlock the lid?
>
> I have not yet cleaned the other two RM03 drives, and I do not want to
> apply power without cleaning and inspection! So, I cannot check whether
> all 3 drives keep the lid locked.
>
> I forgot to take the camera with me, but I will take pictures!
>
> Thanks,
> - Henk



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