TAV-L1 - Sony Audio Service Manual (repair manual). Page 11

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Note2: Note when installing the driving block joint section

When installing the driving block joint section, beware of the bracket (plate screw) front surface.

Note1: If the driving block joint section is moved up or down, it can swing in all directions.

When moving the driving block joint section up or down, 
protect the LCD front surface with protective materials 
such as a cardboard so as not to damage the LCD front surface.

LCD

driving block

protective material

bracket (plate screw)

Note: When the driving block joint section is lowered, rotate the 

A

 in the arrow direction 

so that the driving block joint section comes to the position higher than the sensor 
(to the extent that the belt is removed).

driving block

A

sensor

belt