Yamaha YSP-3000 Service Manual page 23

5. Connect the power cable of main unit to the AC outlet.
While pressing the "VOL+" key and "VOL-" key of the
main unit, press the "STANDBY/ON" key of the remote
control to activate the self-diagnostic function.
1 Using the "UP" or "DOWN" key of the remote control,
select the self-diagnostic function menu in the figure
below.
2 Using the "LEFT" or "RIGHT" key of the remote
control, select the self-diagnostic function sub-menu
in the figure below.
3 Using the "ENTER" key of the remote control, make
a change as shown below.
6. When the program transmission is completed, the
screen appears as shown below.
TxTestCh [---]
T1 Write [OFF]
T1 Write [ON ]
Change OFF to ON
YSP-3000/YSP-30D/HTY-7030
23