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C1533A DDS Repair


Achim Buerger
 

Hi all,

I have a C1533A DDS-2 drive which does not read tapes anymore. A possible cause is a detoriated pressore roller next to the rotating RW head (see photo with red arrow). This roller seems to be made of foam rubber, which crumbles. Has anyone an idea know how to replace this?

Achim


Stephen Hanselman
 

OK,  first the roller you describe is not a pressure roller per se.  The DDS-2 tape unit is essentially a Beta-Max (or U-Matic take your pick) Sony video recorder in miniature.  When the tape is loaded the two little rollers located about .5” to the left of the drum pick up the tape in the cartridge and wrap it around the drum.  The unit gets it’s bandwidth from a combination of tape speed and drum rotation speed.  Well not exactly the drum , the R/W head is a structure with a small gap in it that protrudes out of the slot in the drum.  It literally pushes into the tape and as a result both the gap can fill with oxide and the oxide on the tape gets worn away.

 

So if the roller you speak of is worn and crumbling the replace it with something close, but look more at the condition of the head (there may actually be two or even four) and/or the condition of the tape it-self. 

 

Steve

 

From: VintHPcom@groups.io <VintHPcom@groups.io> On Behalf Of Achim Buerger
Sent: Friday, January 8, 2021 4:21 AM
To: VintHPcom@groups.io
Subject: [VintHPcom] C1533A DDS Repair

 

Hi all,

I have a C1533A DDS-2 drive which does not read tapes anymore. A possible cause is a detoriated pressore roller next to the rotating RW head (see photo with red arrow). This roller seems to be made of foam rubber, which crumbles. Has anyone an idea know how to replace this?

Achim


al_kossow
 

A possible cause is a detoriated pressore roller next to the rotating RW head (see photo with red arrow).
that is a head cleaner that will activate on tape retries

check the tape is wrapping around the head correctly, and that the tape is moving
via the pinch roller