Ic Pin Function Descriptions - FUNAI 27A-650 Service Manual

IC PIN FUNCTION DESCRIPTIONS

Comparison Chart of Models and Marks
Model
27A-650
27A-654
IC501( SERVO / SYSTEM CONTROL IC )
Pin IN/ Signal
Mark
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 OUT ST-S
11 -
N.U.
12 - N.U.
13 OUT D-V- SYNC
IN REMOCON-
14
IN
15 OUT C-ROTA
Mark
A
B
"H" ≥ 4.5V, "L" ≤ 1.0V
Active
Function
Level
Input Signal
A/D
from Pin 8 of
SCART2
Video Head
Switching
A/D
Pulse Signal
Adjusted
Voltage
P-ON Power
Detection Input A/D
Signal
Tape End
Position A/D
Detect Signal
Automatic
A/D
Frequency
Control Signal
Video
Envelope
A/D
Comparator
Signal
Key Scan Input
A/D
Signal 1
Key Scan Input
A/D
Signal 2
Deck Mode
Position A/D
Detector Signal
Tape Start
Position A/D
Detector Signal
-
Not Used
Not Used -
H/Hi-
Dummy V-sync
Output
z
Remote
L
Control Sensor
Color Phase
Rotary
H/L
Changeover
SIgnal
1-11-1
Pin IN/ Signal
Mark
No. OUT Name
OUT H-A-SW
16
IN H-A-COMP
17
18 OUT RF-SW
19 OUT HiFi-H-SW
- N.U.
A
20
IN DAVN-L
B
21 -
N.U.
22 - N.U.
23 -
N.U.
24 - N.U.
25 - N.U.
26 -
N.U.
OUT RGB-
27
THROUGH
28 OUT LINE MUTE
29 -
N.U.
30 - N.U.
31 IN REC-SAF-SW
32 IN A-MODE
33 OUT D-REC-H
34 IN RESET
35 IN XC-IN
36 OUT XC-OUT
37 - Vcc
38 IN X-IN
Active
Function
Level
Video Head
Amp Switching H/L
Pulse
Head Amp
Comparator H/L
Signal
Video Head
Switching H/L
Pulse
HiFi Audio
Head Switching H/L
Pulse
Not Used -
VPS/PDC Data
L
Receive = "L"
-
Not Used
Not Used -
-
Not Used
Not Used -
Not Used -
-
Not Used
SCART 2 RGB
H/L
Through
Control Signal
Audio Mute
L
Control
Signal
-
Not Used
Not Used -
Recording
Safety SW
Detect (With
Record H
tab="L"/With
out Record
tab="H")
Hi-Fi Tape
L
Detection
Signal
Delayed
L
Record Signal
System Reset
L
Signal
(Reset="L")
-
Sub Clock
Sub Clock -
Vcc -
Main Clock
-
Input
HE450PIN