Yamaha YSP-1 Service Manual page 29

4. MANUAL TEST
The noise generator with a built-in DSP outputs the test
noise through the channels specified by the sub-menu.
The noise frequency for LFE is 35 to 250 Hz. Other than
that, the center frequency is 800Hz.
TEST ALL
Noise is output from all channels.
TEST FRONT R
Noise is output from the FRONT R channel.
TEST LFE
Noise is output from the SUB
WOOFER channel.
5. 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 RS-232C terminal. (Be sure to
turn off the power when shorting the pins.)
Start DIAG 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
This sub-menu is used to check operation of the flow port
of the hardware. "OK" appears when the check result is
satisfactory and "NG" when it is not.
TEST FRONT L
Noise is output from the FRONT L channel.
TEST SURROUND R
Noise is output from the SURROUND R
channel.
RxD TxD
1 2 3 4 5
6 7 8 9
RTS CTS
TEST CENTER
Noise is output from the CENTER
channel.
TEST SURROUND L
Noise is output from the SURROUND L
channel.
YSP-1
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