1-13-1
HM240PIN
IC PIN FUNCTION DESCRIPTIONS
Comparison Chart of Models and Marks
IC501( SERVO / SYSTEM CONTROL IC )
“H”
≥
4.5V, “L”
≤
1.0V
Model
Mark
31A-250
A
31C-250
B
31D-250
C
Pin
No.
Mark
IN/
OUT
Signal
Name
Function
Active
Level
1
IN
SC2-IN
Input Signal
from Pin 8 of
SCART2
A/D
2
IN
PG-
DELAY
Video Head
Switching Pulse
Signal Adjusted
Voltage
A/D
3
IN
POW-SAF
P-ON Power
Detection Input
Signal
A/D
4
IN
END-S
Tape End
Position Detect
Signal
A/D
5
IN
AFC
Automatic
Frequency
Control Signal
A/D
6
IN
V-ENV
Video Envelope
Comparator
Signal
A/D
7
IN
KEY-1
Key Scan Input
Signal 1
A/D
8
IN
KEY-2
Key Scan Input
Signal 2
A/D
9
IN
LD-SW
Deck Mode
Position
Detector Signal
A/D
10
IN
ST-S
Tape Start
Position
Detector Signal
A/D
11
-
NU
Not Used
-
12
-
NU
Not Used
-
13
OUT
D-V-
SYNC
Dummy V-sync
Output
H/Hi-z
14
IN
REMOCON
-IN
Remote Control
Sensor
L
15
OUT C-ROTA
Color Phase
Rotary
Changeover
SIgnal
H/L
16
-
NU
Not Used
-
17
-
NU
Not Used
-
18
OUT RF-SW
Video Head
Switching Pulse
H/L
19
-
NU
Not Used
-
20
-
NU
Not Used
-
21
-
NU
Not Used
-
22
A,B
-
NU
Not Used
-
C
OUT TUN-SW2
Tuner System
Control Signal
Output
H/L
23
OUT
POWER-
LED
“STANDBY”
LED Signal
Output
H
24
OUT CAS-LED
“TAPE IN” LED
Signal Output
H
25
OUT
TIMER-
LED
“TIMER” LED
Signal Output
H
26
OUT REC-LED
“REC” LED
Signal Output
H
27
-
NU
Not Used
-
28
-
NU
Not Used
-
29
OUT
AUDIO-
SW-1
Audio IN/OUT
Control Signal
H/L
30
OUT
AUDIO-
SW-2
Audio IN/OUT
Control Signal
H/L
31
IN
REC-
SAF-SW
Recording
Safety SW
Detect (With
Record tab="L"/
With out Record
tab="H")
H
32
IN
A-MODE
Hi-Fi Tape
Detection
Signal
L
33
OUT D-REC-H
Delayed Record
Signal
H
34
IN
RESET
System Reset
Signal
(Reset=”L”)
L
35
IN
Xcin
Sub Clock
-
36
OUT Xcout
Sub Clock
-
37
-
Vcc
Vcc
-
38
IN
Xin
Main Clock
Input
-
39
OUT Xout
Main Clock
Input
-
Pin
No.
Mark
IN/
OUT
Signal
Name
Function
Active
Level
