Ic Pin Function - Hitachi VT-FX665AC Service Manual

IC501 ( SERVO / SYSTEM CONTROL IC )
Pin IN/ Signal
No. OUT Name
REMO
1 IN
CON-IN
2 OUT TV/VCR
3 – N.U.
4 – N.U.
5 – N.U.
6 – N.U.
OUT INSEL/
7
ST-SL
8 OUT HiFi-CS
2
IN/ I C BUS-
9
OUT DATA
2
OUT I C BUS-
10
CLK
OUT HiFi-CLK HiFi IC Control
11
OUT HiFi-
12
DATA
OUT A-MUTE Audio Mute Control
13
H-A-
14 IN
COMP
15 OUT C-ROTA
16 OUT H-A-SW
17 OUT RF-SW
HiFi-H-
18 OUT
SW
REC-CTL
19 OUT
(+)
REC-CTL
20 OUT
(-)
21 IN C-SYNC
22 – GND
23 – N.U.
24 – OSDVss OSDVss

IC PIN FUNCTION

"H" ≥ 4.5V, "L" ≤ 1.0V
Active
Function
Remote Control
Sensor
RF Conv. ON/OFF
Signal (TV="L"/
VCR="H")
Not Used
Not Used
Not Used
Not Used
Input Selector
Control Signal
(EE/Rec)/
Still/Slow (Playback)
HiFi IC Chip Select
2
I C BUS Data
Input/Output
2
I C BUS Clock
Output
Clock Output
HiFi IC Control
Data Output
Signal (Mute="H")
Head Amp
Comparator Signal
Color Phase Rotary
Changeover Signal
Video Head Amp
Switching Pulse
Video Head
Switching Pulse
HiFi Audio Head
Switching Pulse
Record Control
Signal (+)
Record Control
Signal (-)
Composite
PULSE
Synchronized Pulse
GND
Not Used
Pin IN/
No. OUT
25 IN
Level
L
26 IN
H/L
27 IN
–
28 –
–
–
29 –
–
OUT OSD-BB-
30
H/Hi-z
/L
31 OUT
H
32 –
H/L
33 OUT
H/L
34 IN
H/L
35 IN
H/L
36 OUT OSC
H
37 –
H/L
38 IN
H/L
39 OUT Xout
40 –
H/L
41 IN
H/L
42 OUT XC OUT
43 IN
H/L
44 –
H/L
45 OUT
H/L
46 –
47 OUT
–
–
48 OUT C-F/R
–
1-12-1
Signal
Function
Name
Recording Safety
SW Detect (With
REC-SAF
Record tab="L"/
-SW
With out Record
tab="H")
C-VIDEO Composite Video
-IN Signal Input (Slicer)
Condenser
V-HOLD Connected Terminal
(Slicer)
LPF Connected
HLF
Terminal (Slicer)
GND GND
Composite Video
Signal Output
OUT
(Blue Back)
OSD-
Character Output
CHARA-
(Superimposed)
OUT
OSDVcc OSDVcc
D-V
Dummy V-sync
SYNC-
Output
OUT
System Reset
RESET
Signal (Reset= "L")
Clock Input for
OSC
IN
letter size
Clock Output for
OUT
letter size
Vcc Vcc
Main Clock Input
X
IN
14.31818 MHz
Main Clock Output
Vss Vss(GND)
XC IN Sub Clock 32 kHz
Sub Clock 32 kHz
CLKSEL Clock Select (GND)
N.U. Not Used
Tape Speed Select
SP/LP
Signal (SP="L"/
/SLP
LP="Z"/SLP="H")
N.U. Not Used
Special Playback
TRICK/
/Copy Guard/APC
C-G/APC
Control Signal
Capstan Motor
FWD/REV Control
Signal (FWD="L"/
REV="H")
Active
Level
H/L
–
–
–
–
–
–
–
H/Hi-z
L
–
–
–
–
–
–
–
–
L
–
H/Z/L
–
H/Z/L
H/L