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IC PIN FUNCTION DESCRIPTIONS
[ VR750/39, VR752/39 ]
IC501( SERVO / SYSTEM CONTROL IC )
Pin
IN/
Signal
No.
OUT
Name
Input Signal from Pin
1
IN SC2-IN
8 of SCART2
Video Head
Switching Pulse
2
IN PG-DELAY
Signal Adjusted
Voltage
P-ON Power
3
IN POW-SAF
Detection Input
Signal
Tape End Position
4
IN END-S
Detect Signal
Automatic Frequency
5
IN AFC
Control Signal
Video Envelope
6
IN V-ENV
Comparator Signal
Key Scan Input
7
IN KEY-1
Signal 1
Key Scan Input
8
IN KEY-2
Signal 2
Deck Mode Position
9
IN LD-SW
Detector Signal
Tape Start Position
10
IN ST-S
Detector Signal
11
-
N.U.
Not Used
12
-
N.U.
Not Used
13 OUT D-V-SYNC Dummy V-sync
Output
IN REMOCO
Remote Control
14
N-IN
Sensor
Color Phase Rotary
15 OUT C-ROTA
Changeover SIgnal
Video Head Amp
16 OUT H-A-SW
Switching Pulse
IN H-A-COMP Head Amp
17
Comparator Signal
Video Head
18 OUT RF-SW
Switching Pulse
19 OUT Hi-Fi-H-SW Hi-Fi Audio Head
Switching Pulse
20
-
N.U.
Not Used
21
-
N.U.
Not Used
22
-
N.U.
Not Used
23
-
N.U.
Not Used
24
-
N.U.
Not Used
25
-
N.U.
Not Used
26
-
N.U.
Not Used
"H" ≥ 4.5V, "L" ≤ 1.0V
Active
Function
Level
A/D
A/D
A/D
A/D
A/D
A/D
A/D
A/D
A/D
A/D
-
-
H/Hi-z
L
H/L
H/L
H/L
H/L
H/L
-
-
-
-
-
-
-
1-14-3
Pin
IN/
Signal
No.
OUT
Name
SCART 2 RGB
27 OUT RGB-
Through Control
THROUGH
Signal
28 OUT LINE-
Audio Mute Control
MUTE
Signal
29
-
N.U.
Not Used
30
-
N.U.
Not Used
Recording Safety
IN REC-SAF-
SW Detect (With
31
SW
Record tab="L"/With
out Record tab="H")
Hi-Fi Tape Detection
32
IN A-MODE
Signal
Delayed Record
33 OUT D-REC-H
Signal
System Reset Signal
34
IN RESET
(Reset="L")
35
IN XC-IN
Sub Clock
36 OUT XC-OUT
Sub Clock
37
-
Vcc
Vcc
38
IN X-IN
Main Clock Input
39 OUT X-OUT
Main Clock Input
40
-
Vss
Vss(GND)
41
-
N.U.
Not Used
42
-
N.U.
Not Used
43
IN CLKSEL
Clock Select (GND)
Clock Input for letter
44
IN OSCin
size
Clock Output for
45 OUT OSCout
letter size
46
-
N.U.
Not Used
47
-
LP
LP
IN FSC-IN
48
4.43MHz Clock Input
[4.43MHz]
49
-
OSDVss
OSDVss
OSD Video Signal
50
IN OSD-V-IN
Input
51
-
N.U.
Not Used
52 OUT OSD-V-
OSD Video Signal
OUT
Output
53
-
OSDVcc
OSDVcc
LPF Connected
54
-
HLF
Terminal (Slicer)
SECAM or
MESECAM Chroma
55
IN
COLOR-IN
Video Input Signal at
Super Impose
Active
Function
Level
L/H
H
-
-
H
L
H
L
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
HG493PIN
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