Yamaha YSP-3000 Service Manual page 42

YSP-3000/YSP-30D/HTY-7030
9. 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)
* When the value of PS, P2 and P3 is not at the normal
value level, the protection function works and the power
is turned off.
(Reference voltage: 3.3V=100%)
PS (PS1) Voltage detects:
Normal value:
P2 (PS2) Voltage detects:
Normal value:
P3 (PS3) Voltage detects:
Normal value:
* The normal value has been revised from 3.3V
(measured value) to 2.5V (indicated value) by the
voltage dividing resistor.
PS:078%[2.57V]
K0/K1 (Panel key of main unit)
A/D of the key fails to function properly when the standard
value is deviated by ±2%. In this case, check the constant
of partial pressure resistor, solder condition, etc.
(Reference voltage: 3.3V=100%)
42
-24 V, +5.3X (U, C, B
models), +5 V, +5I (U,
C, A, B models)
48 to 84 (1.61 to 2.78 V)
+12 V, T+10 (U, C, K,
A, G, E, L, V models) ,
D+12
59 to 82 (1.96 to 2.71 V)
+3.3 V
61 to 91 (2.03 to 3.0 V)
P2:069%[2.27V]
K0:100 K1:099
[%] K0
0+2 VOLUME +
10±2 INPUT
100-2 NO KEY
P3:075%[2.47V]
K1
VOLUME -
–
NO KEY