Service manual

YSP-500/HTY-750
57
Key detection for A/D port
Pull-up resistance 10 k-ohms
R [ohm]
V [V]
KEY 0
(138 Pin)
KEY 1
(139 Pin)
0
0~0.165
VOLUME+
VOLUME-
+1.2 k
~0.495
INPUT
NO KEY
Destination for AD port
Pull-up resistance 10 k-ohms
PS_PROTECT
Vref=3.3 V
R [ohm]
V [V]
Destination
(133 Pin)
15 k
~2.145
B, G, E
(HTY-750)
24 k
~2.475
V, K
39 k
~2.805
(U, C)
∞
(Pull-up)
~3.3
J
91 k
~3.135
T, A, B, G,
L, E
(YSP-500)
VOL_DET1
(134 Pin)
+3.3 V_DET
(135 Pin)
VOL_DET2
(136 Pin)
LOW
HI
LOW
HI
LOW
HI
~1.6 V
3.0 V~
~2.2 V
2.8 V~
~2.1 V
2.9 V~
48.7 %
91.3 %
66.9 %
85.2 %
63.9 %
88.2 %
PS Low
PS Hi
PS3Low
PS3Hi
PS2Low
PS2Hi
0~124
233~255
0~171
217~255
0~163
225~255
125~232
172~216
164~224
Abnormal voltage
detection range
Protection module definition value
PS Value %
Normal
range value