Ic Pin Function - FUNAI 23C-250 Service Manual

IC501 ( SERVO / SYSTEM CONTROL IC )
Pins that have * in the Pin No. section on table below
are not used.
Pin IN/ Signal
No. OUT Name
REMO Remote Control
1 IN
CON-IN Sensor
SECAM- SECAM or
2 OUT CHARA MESECAM Mode
-H Super Inpose="H"
Control Output
OUT DEC/
3 Siganl to AV1 (Scart
PB-L
Jack)
IIC BUS
IIC BUS-
4 OUT Control
SCL-2
Clock
IN/ IIC BUS- IIC BUS Control
5
OUT SDA-2 Data
VPS/PDC Data
6 IN DAVN-L
Receive ="L"
Tuner System
TUN-
7 OUT Control Signal
SW-1
Output
Tuner System
TUN-
8 OUT Control Signal
SW-2
Output
IIC BUS
IN/ IIC BUS-
9
Control
OUT SDA-1
Data
IIC BUS- IIC BUS Control
10 OUT
SCL-1 Clock
11 – N.U. Not Used
12 – N.U. Not Used
13 – N.U. Not Used
H-A- Head Amp
*14 IN
COMP Comparator Signal
Color Phase Rotary
15 OUT C-ROTA
Changeover Signal
Video Head Amp
*16 OUT H-A-SW
Switching Pulse
Video Head
17 OUT RF-SW
Switching Pulse
HiFi-H- HiFi Audio Head
*18 OUT
SW Switching Pulse
OUT REC-CTL Record Control
19
(+) Signal (+)
OUT REC-CTL Record Control
20
(-) Signal (-)
C-SYNC Composite
21 IN
Synchronized Pulse

IC PIN FUNCTION

"H" ≥ 4.5V, "L" ≤ 1.0V
Active
Function
Level
L
H
L
H/L
H/L
L
H/L
H/L
H/L
H/L
–
–
–
H/L
H/L
H/L
H/L
H/L
H/L
H/L
PULSE
1-11-1
Pin IN/ Signal
No. OUT Name
22 – GND GND
SECAM SECAM Mode at
23 IN
-H High
24 – OSDVss OSDVss
Recording Safety
SW Detect (With
REC-SAF
25 IN Record tab="L"/
-SW
With out Record
tab="H")
C-VIDEO Composite Video
26 IN
-IN Signal Input (Slicer)
Condenser
27 IN VHOLD Connected Terminal
(Slicer)
LPF Connected
28 – HLF
Terminal (Slicer)
29 – GND GND
Composite Video
OSD-BB-
30 OUT Signal Output
OUT
(Blue Back)
OSD-
Character Output
31 OUT CHARA-
(Superimposed)
OUT
32 – OSDVcc OSDVcc
D-V
Dummy V-sync
33 OUT SYNC-
Output
OUT
System Reset
34 IN RESET
Signal (Reset= "L")
Clock Input for
35 IN OSC
IN
letter size
Clock Output for
36 OUT OSC
OUT
letter size
37 – Vcc Vcc
MAIN Main Clock Input
38 –
CLOCK 17.734476 MHz
MAIN Main Clock Input
39 –
CLOCK 17.734476 MHz
40 – Vss Vss(GND)
SUB
41 – Sub Clock 32 kHz
CLOCK
SUB
42 – Sub Clock 32 kHz
CLOCK
43 IN CLKSEL Clock Select (GND)
Tuner Dual
*44 IN DUAL-L
Detector Signal
Tuner Stereo
*45 IN ST-L
Detector Signal
Active
Function
Level
–
H
–
H
–
–
–
–
–
–
–
H/Hi-z
L
–
–
–
–
–
–
–
–
L
L
L
H8743PIN