Yamaha TG77 Manuel d'installation - Page 11

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Yamaha TG77 LCD Replacement Guide

Fig. 10 - Metal Box Covering Removed from the Inverter

Step 4:

Once the metal box is removed, you will find a small inverter circuit board

with two wired connections. Unplug both of these connections and remove

the inverter circuit board, it is held in place by two screws. The inverter

circuit board is no longer needed for the replacement LCD.

The 2-pin connector that was unplugged from the inverter is connected to

the power supply board and labeled CN605. As stated, CN605 needs to be

desoldered from the power supply board.

Remove the power supply circuit board, which is held in place by 6 screws,

the locations are shown in Fig. 11 on page 12. In order to flip the power

supply board over you will need to also detach the black plastic power

switch button; note how it is oriented so you can correctly reinstall it once

finished. Flip the power supply circuit board over, desolder and remove

CN605, the 2-pin wired connector.

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