Ic Pin Function Descriptions - Philips VR540/39 Service Manual

[ VR540/ (39, 58), VR740/ (02, 07, 16, 58), VR742/ (16, 39, 58) ]
Comparison Chart of Models and Marks
Model
VR540/36
VR540/58
VR740/02
VR740/07
VR740/16
VR740/58
VR742/16
VR742/39
VR742/58
IC501( SERVO / SYSTEM CONTROL IC )
Pin IN/ Signal
Mark
No. OUT Name
1 IN SC2-IN
PG-
2 IN
DELAY
POW-
3 IN
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

IC PIN FUNCTION DESCRIPTIONS

Mark
D
E
F
G
H
I
J
K
L
"H" ≥ 4.5V, "L" ≤ 1.0V
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
Pin
Mark
No.
11
12
13
14
15
16
17
18
Active
Level
19
F,G,
L/Hi-z
H,I,J,
20
K,L
D,E
A/D
21
22
23
A/D
24
25
A/D
26
27
A/D
28
A/D
29
A/D
30
A/D
31
A/D
A/D
32
1-14-3
IN/ Signal
Function
OUT Name
- N.U. Not Used
-
N.U. Not Used
OUT D-V- Dummy V-sync
SYNC Output
REMOC Remote
IN
ON-IN Control Sensor
Color Phase
Rotary
OUT C-ROTA
Changeover
SIgnal
Video Head
OUT H-A-SW Amp Switching
Pulse
Head Amp
H-A-
IN
Comparator
COMP
Signal
OUT RF-SW Video Head
Switching Pulse
OUT HiFi-H- HiFi Audio Head
SW Switching Pulse
VPS/PDC Data
IN DAVN-L
Receive = "L"
- N.U. Not Used
-
N.U. Not Used
- N.U. Not Used
- N.U. Not Used
-
N.U. Not Used
- N.U. Not Used
-
N.U. Not Used
RGB- SCART 2 RGB
OUT THROUG Through Control
H Signal
Audio Mute
OUT LINE
Control
MUTE
Signal
- N.U. Not Used
-
N.U. Not Used
Recording
Safety SW
REC-
Detect (With
IN
SAF-
Record tab="L"/
SW
With out Record
tab="H")
A- Hi-Fi Tape
IN
MODE Detection Signal
Active
Level
-
-
H/Hi-z
L
H/L
H/L
H/L
H/L
H/L
L
-
-
-
-
-
-
-
L/Hi-z
L
-
-
H
L
HE473PIN