Sharp MD-X60 Service Manual page 78

MD-X60
IC901 RH-iX2757AFZZ:System Control Micon (4/4)
Terminal Name
Pin No.
93 APSS Detection P51/A9
94 RUN PULSE
95 Side B FP SW
96 Side A FP SW
97 Casette SW
98 CrO2 SW
99 MAIN SW
100 –
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
IC501 VHiLC75396E-1 (LC75396E):Audio Prosessor
LSELO
49
LINVIN1
50
L5
51
L4
52
L3
53
L2
54
L1
55
56
R1
57
R2
58
R3
59
R4
60
R5
61
RINVIN1
62
RSELO
63
RTIN
64
Input/Output
Port Name
Input
P52/A10 Input
P53/A11 Input
P54/A12 Input
P55/A13 Input
P56/A14 Input
P57/A15 Input
VSS –
48 47 46 45 44
+
-
-
+
CONTROL
CIRCUIT
+
-
-
+
1 2 3 4 5
Figure 78 BLOCK DIAGRAM OF IC
Setting
Active
in Reset
Level
H H Detection of APSS signal.
Detection by switching L to H only in APSS operation mode.
– – Tape end detection.
Repeated input of L->H->L->H during tape running.
L – Detection of B side record enabling/disabling "L": Record is
enabled if SW is ON.
L – Detection of A side record enabling/disabling "L": Record is
enabled if SW is ON.
L – Cassette detection.
"L": Cassette exists if SW is ON.
"H": Cassette does not exist if SW ON.
L – CrO2 tape detection.
"H": CrO2 tape exists if SW is OFF.
"L": Normal tape exists if SW is ON.
L – Mechanism operation detection.
"H": Any state other than STOP state if SW is ON.
"L": STOP state if SW is ON.
– – Ground potential. Connected to VSS.
43 42 41 40 39 38 37
+ +
- -
+
-
LOGIC CIRCUIT
-
+
- - -
+ + +
6 7 8 9 10 11 12
– 78 –
Function
36 35 34 33
+
-
+ -
+
-
+
LVref
-
CCB
INTERFACE
+
RVref -
-
+
-
+
+ -
13 14 15 16
LFCOM
32
LFOUT
31
-
+
LRIN
30
LRCOM
29
LROUT
28
LVref
27
VSS
26
CE
25
DI
24
CL
23
Vref
22
RVref
21
RROUT
20
RRCOM
19
RRIN
18
+
-
RFOUT
17