Ic Pin Function Descriptions - FUNAI 31C-850 Service Manual

Comparison Chart of Models and Marks
Model
31C-850
31D-864
IC501( SERVO / SYSTEM CONTROL IC )
Pin IN/ Signal
Mark
No. OUT Name
1 IN SC2-IN
PG-
2 IN
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 - NU
12 - NU
D-V-
13 OUT
SYNC
REMOCON
14 IN
-IN
15 OUT C-ROTA

IC PIN FUNCTION DESCRIPTIONS

Mark
A
B
"H" ≥ 4.5V, "L" ≤ 1.0V
Active
Function
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
Dummy V-sync
H/Hi-z
Output
Remote
Control Sensor
Color Phase
Rotary
Changeover
SIgnal
Pin
Mark
No.
16
17
18
Level
A/D
19
20
A/D
21
22
23
A/D
24
25
A/D
26
27
A/D
28
A/D
29
30
A/D
A/D
31
A/D
32
A/D
33
-
34
-
35
36
L 37
38
H/L
39
1-13-1
IN/ Signal
Function
OUT Name
Video Head
OUT H-A-SW Amp Switching
Pulse
Head Amp
H-A-
IN Comparator
COMP
Signal
Video Head
OUT RF-SW Switching
Pulse
Hi-Fi Audio
Hi-Fi-H- Head
OUT
SW Switching
Pulse
- NU Not Used
- NU Not Used
- NU Not Used
- NU Not Used
- NU Not Used
- NU Not Used
- NU Not Used
- NU Not Used
LINE- Audio Mute
OUT
MUTE Control Signal
- NU Not Used
- NU Not Used
Recording
Safety SW
Detect (With
REC-
IN Record
SAF-SW
tab="L"/With
out Record
tab="H")
Hi-Fi Tape
IN A-MODE Detection
Signal
Delayed
OUT D-REC-H
Record Signal
System Reset
IN RESET Signal
(Reset="L")
IN Xcin Sub Clock
OUT Xcout Sub Clock
- Vcc Vcc
Main Clock
IN Xin
Input
Main Clock
OUT Xout
Input
Active
Level
H/L
H/L
H/L
H/L
-
-
-
-
-
-
-
-
H
-
-
H
L
H
L
-
-
-
-
-
HM453PIN