Technics SL QL1 radial linear tracking vinyl deck

[N Cook]

Perished "rubber" mat , the generic replacement one I replaced it with is
not working with the 3 IR ? LEDs for automatic monitoring of presence of a
record and its size. What is special about the proper Technics one that
differentiates between mat and vinyl. Or is there likely to be an adjustment
under the deck?, the ,new to it mat, looks decidely matt to me, compared to
glossy vinyl.

 

[Ron(UK)]

Perished "rubber" mat , the generic replacement one I replaced it with is
not working with the 3 IR ? LEDs for automatic monitoring of presence of a
record and its size. What is special about the proper Technics one that
differentiates between mat and vinyl. Or is there likely to be an adjustment
under the deck?, the ,new to it mat, looks decidely matt to me, compared to
glossy vinyl.

Doesn't the old mat have several holes coresponding to the size of the
record, and photocels beneath the platter?

Ron(UK)

 

[N Cook]

Doesn't the old mat have several holes coresponding to the size of the
record, and photocels beneath the platter?

Ron(UK)

Snap, about an hour ago
I realised the 3 small radial slots either side of the mat line up with the
LEDs above the record/platter and also holes in the platter so matter of
cutting holes and adding rear locators to the mat for alignment. There are 2
VR accessible via a rear plate but presumably 33 and 45 rpm adjust.

 

[N Cook]

Doesn't the old mat have several holes coresponding to the size of the
record, and photocels beneath the platter?

Ron(UK)

Now I have it back working fully, there are 3 ordinary red LED under the
platter and 3 LED looking opto-trannie/diode? receivers above, on the lid
section.
So just masking off them and taping down the cover closure microswith allows
exposed to work on operation.