Ic Pin Function Descriptions - Philips VR550 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 OUT H-A-SW
IN H-A-COMP Head Amp
17
18 OUT RF-SW
19 OUT Hi-Fi-H-SW Hi-Fi Audio Head
20 -
N.U.
21 -
N.U.
22 -
N.U.
23 -
N.U.
24 - N.U.
25 -
N.U.
26 - N.U.

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
Video Head Amp
Switching Pulse
Comparator Signal
Video Head
Switching Pulse
Switching Pulse
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Pin IN/
No. OUT
27 OUT RGB-
THROUGH
28 OUT LINE-
A/D
MUTE
29 -
N.U.
A/D
30 -
N.U.
IN REC-SAF-
31
A/D
SW
A/D
32 IN A-MODE
A/D
33 OUT D-REC-H
A/D
34 IN RESET
35 IN XC-IN
A/D
36 OUT XC-OUT
A/D
37 -
Vcc
38 IN X-IN
A/D
39 OUT X-OUT
40 - Vss
A/D
41 -
N.U.
-
42 - N.U.
-
43 IN CLKSEL
44 IN OSCin
L
45 OUT OSCout
H/L
46 - N.U.
47 - LP
H/L
IN FSC-IN
48
[4.43MHz]
H/L
49 - OSDVss
H/L
50 IN OSD-V-IN
H/L
51 - N.U.
52 OUT OSD-V-
-
OUT
-
53 - OSDVcc
-
54 -
HLF
-
- 55 - N.U.
-
56 - N.U.
- 57 - N.U.
1-14-1
Signal
Function
Name
SCART 2 RGB
Through Control
Signal
Audio Mute Control
Signal
Not Used
Not Used
Recording Safety
SW Detect (With
Record tab="L"/With
out Record tab="H")
Hi-Fi Tape Detection
Signal
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
Active
Level
L/H
H
-
-
H
L
H
L
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
HG470PIN