Panasonic TH-37PA20AA Service Manual page 303

13. Remove the C1 module.
A. Remove the flexible cable holder fastening screws (×6)
connected to the C1 module, and remove flexible cables (CB1,
CB2, CB3).
B. Remove the flexible cable (C12) connected to the C1 module.
C. Remove the C1 module fastening screws (×4), and remove the
C1 module.