Ic Pin Function Descriptions - Centrum GEB100 Service Manual

IC501( SERVO / SYSTEM CONTROL IC )
Pin IN/ Signal
No. OUT Name
1 IN SC2-IN
2 IN PG-DELAY
3 IN POW-SAF
4 IN END-S
5 IN AFC
6 IN V-ENV
7 IN KEY-1
8 IN KEY-2
9 IN LD-SW
10 IN ST-S
11 -
N.U.
12 -
N.U.
13 OUT D-V-SYNC Dummy V-sync
IN REMOCO
14
N-IN
15 OUT C-ROTA
16 -
N.U.
17 -
N.U.
18 OUT RF-SW
19 -
N.U.
20 -
N.U.
21 -
N.U.
22 - N.U.
23 OUT POWER-
LED
24 OUT CAS-LED
25 OUT TIMER-
LED
26 OUT REC-LED

IC PIN FUNCTION DESCRIPTIONS

"H" ≥ 4.5V, "L" ≤ 1.0V
Active
Function
Level
Input Signal from Pin
8 of SCART2
Video Head
Switching Pulse
Signal Adjusted
Voltage
P-ON Power
Detection Input
Signal
Tape End Position
Detect Signal
Automatic Frequency
Control Signal
Video Envelope
Comparator Signal
Key Scan Input
Signal 1
Key Scan Input
Signal 2
Deck Mode Position
Detector Signal
Tape Start Position
Detector Signal
Not Used
Not Used
H/Hi-z
Output
Remote Control
Sensor
Color Phase Rotary
Changeover SIgnal
Not Used
Not Used
Video Head
Switching Pulse
Not Used
Not Used
Not Used
Not Used
"POWER" LED
Signal Output
"CASSETTE" LED
Signal Output
"TIMER" LED
Signal Output
Recording LED
Control Signal
Pin IN/
No. OUT
27 -
N.U.
28 -
N.U.
29 OUT AUDIO-
A/D
SW-1
30 OUT AUDIO-
SW-2
A/D
IN REC-SAF-
31
SW
A/D
32 -
N.U.
A/D
33 OUT D-REC-H
A/D
34 IN RESET
A/D
35 IN XC-IN
36 OUT XC-OUT
A/D
37 -
Vcc
A/D
38 IN X-IN
39 OUT X-OUT
A/D
40 - Vss
41 -
N.U.
A/D
42 - N.U.
-
43 IN CLKSEL
-
44 IN OSCin
45 OUT OSCout
L
46 - N.U.
H/L
47 - LP
- IN FSC-IN
48
[4.43MHz]
-
49 - OSDVss
H/L
50 IN OSD-V-IN
-
51 - N.U.
-
52 OUT OSD-V-
-
OUT
-
53 - OSDVcc
H
54 -
HLF
55 - N.U.
H
56 - N.U.
H
57 - N.U.
58 IN C-SYNC
1-11-1
Signal
Function
Name
Not Used
Not Used
Audio IN/OUT
Control Signal
Audio IN/OUT
Control Signal
Recording Safety
SW Detect (With
Record tab="L"/With
out Record tab="H")
Not Used
Delayed Record
Signal
System Reset Signal
(Reset="L")
Sub Clock
Sub Clock
Vcc
Main Clock Input
Main Clock Input
Vss(GND)
Not Used
Not Used
Clock Select (GND)
Clock Input for letter
size
Clock Output for
letter size
Not Used
LP
4.43MHz Clock Input
OSDVss
OSD Video Signal
Input
Not Used
OSD Video Signal
Output
OSDVcc
LPF Connected
Terminal (Slicer)
Not Used
Not Used
Not Used
Composite
Synchronized Pulse
Active
Level
-
-
H/L
H/L
H
-
H
L
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PULSE
HG221PIN