Yamaha S80 Service Manual download pdf (Page 28)

S80

T25. mLAN

Connect the mLAN board to the mLAN slot and execute

testing.

After checking the connection of the mLAN board, the signal

transmission and reception of the MIDI line, the RESET

request signal, and the operation of OUT + SWP30 of the

MEL line by the external clock, check that “OK” appears.

Also, confirm that a 900 Hz sine wave output is obtained

as the final signal at OUTPUT L and R.

DISPLAY OF RESULTS

xxxxxxx

: Error code

Error code

NO-BOARD: board is not loaded.

RESET: errror in the reset request signal check

MIDI: MIDI line failure

MEL: MEL OUT line failure

TEST END

When the [EXIT] switch is pressed, the sound output

will stop and the next test number will be set.

T26. FACTORY SET

This test is used to restore the factory settings.

When the test is executed, the following message will

appear on the LCD.

Pressing [YES] will restore the factory settings.

Pressing [NO] will not restore the factory settings.

When the test ends properly, the sine wave sound is

output momentarily.

DISPLAY OF RESULTS

When the factory settings are restored

When the factory settings are not restored

TEST END

The test ends after the result is displayed.

FACTORY SETTING DATA

After the factory settings are restored, the following data

will be set.

T27. SWP Ch

From OUTPUT-L, the sound output is repeated until the

EXIT switch is pressed via the SWP64Ch on the Master

side to the L channel and via the SWP64Ch on the Slave

side to the R channel.

Connect the plugs to OUTPUT-L and R. Observe the

output waveform using the oscilloscope to check that the

level of all channels is within the below specified

range.

Set the master volume to the Max position.

OUTPUT-L: 1 kHz ±1.5 Hz, sine wave

OUTPUT-R: 2 kHz ±1.5 Hz, sine wave

Also, the following message appears on the LCD during

sound output.

xxx

: Sound outputting channel no.

Either 64 or 128 can be selected for the mode.

TEST END

AUTO: when the [EXIT] switch is pressed,the sound

output will stop.

MANUAL: when the [EXIT] switch is pressed,the sound

output will stop and the mode select standby

state will be set. When the EXIT switch is

pressed twice more, testing will end.

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Yamaha S80 Service Manual Page 28

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