Sony KLV-V40A10E Service Manual page 23

8. The boards are now arranged properly in the service position. If access is required to the underside of the A2 board then an interface (IF)
board is needed.
9. Using the IF board the A2 board can then be mounted vertically as shown in the picture below.
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IF Board Side A
IF Board Part Number: 9-948-020-71
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IF Board Side B
AT2X
RM-EA001/RM-ED001