Yamaha HTY-760 Service Manual page 43

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7. RS-232C
This menu is used to check transmission of the data
and the flow port of the hardware.
With the power turned off, short between pins No. 2
(RxD) and No. 3 (TxD), and between pins No. 7 (RTS)
and No. 8 (CTS) of the RS232C terminal. (Be sure to
turn off the power when shorting the pins.)
Start self-diagnostic function and select the menu.
There are two sub-menu items.
TxD/RxD DATA
The sub-menu is used to check transmission of the test
data. "OK" appears when the data is transmitted properly
and "NG" when it is not.
In this mode, NULL command transmission is continued
after the test command is transmitted.
HARD FLOW
Not applied to these models.
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L 13942296513
8. FACTORY PRESET
This menu is used to reserve and inhibit initialization of
the back-up RAM.
8. PRESET INHI
8. PRESET RSRV
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7. TxRxData:NG
7. HardFlow:NG
PRESET INHIBIT (Initialization inhibited) /
RAM initialization is not executed. Select this sub-menu to protect the values set by the
user.
PRESET RESERVED (Initialization reserved) /
Initialization of the back-up RAM is reserved. (Actually, initialization is executed the next
time that the power is turned on.) Select this sub-menu to reset to the original factory
settings or to reset the RAM. Any protection history will be cleared.
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2 9
8
RxD TxD
1 2 3 4 5
6 7 8 9
RTS CTS
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3 6 7 1 3 1 5
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YSP-600/HTY-760
9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
9 9
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