Yamaha TG77 Installation Manual page 9

Yamaha TG77 LCD Replacement Guide
Fig. 7 - Location of CN605 which needs to be removed
Step 3:
In order to power the backlight of the new replacement LCD the wired
connector labeled CN605 located on the power supply circuit board
needs to be desoldered and replaced with the white 2-pin connector
part that is provided with the replacement LCD.
In order to desolder CN605, the power supply circuit board needs to be
removed and flipped over to work on. To remove the power supply
circuit board, first remove the metal box that covers the inverter. This is
shown in Fig. 8 on page 10. The metal covering is held in by 2 screws on
the side of the case as shown in Fig. 9 on page 10.
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