Yamaha YSP-1 Service Manual page 31

7. AD DATA CHECK
This menu is used to display the A/D conversion value
of the main CPU which detects panel keys of the main
unit and protection functions in % using the sub-menu.
During signal processing, the condition before
execution is maintained.
* The figures in the diagram are given as reference
only.
PS (Power supply voltage protection detection)
PS: Power supply voltage protection value (Normal
value: PS: 52 to 86)
* If PS is out of the normal value range, the protection
function works to turn off the power.
(Reference voltage: 3.3V=100%)
K0/K1 (Panel key of main unit) [Remote control code: –]
A/D of the key fails to function properly when the standard
value is deviated by ±4%. In this case, check the constant
of partial pressure resistor, solder condition, etc. Refer to
table 2.
(Reference voltage: 3.3V=100%)
8. VC STATUS
Not applied to this model.
LOW BYTE DATA
Not applied to this model.
HIGH BYTE DATA
Not applied to this model.
[Table 2 / ]
Display K0
0+2 VOLUME + VOLUME -
10±2 INPUT
100-2 NO KEY NO KEY
K1
–
YSP-1
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