Sylvania SST4274S, Service Manual, Page: 39 / 54

10-1 L2712PIN
IC PIN FUNCTIONS
IC111 (TV Micro Controller)
Pin
No.
Signal Name Function
1 CNVSS GND
2 N.U. Not Used
3 N.U. Not Used
4 N.U. Not Used
5 GND GND
6 VCC ALL +5V
7 N.U. (GND)
8 FILT FILT
9 HLF Filter for CCD
10 VHOLD VHOLD
11 CVIN Input for Video Signal
12 RESET RESET
13
MCU RESET
OUT
RESET Signal Output
14 Y-SW OUT Composite Signal Output
15 GND GND
16 3.58 X'TAL 3.58MHz Crystal
17 C-APC CHROMINANCE APC
18
MCU 5.7REG
OUT Micro controller Control
Voltage Output
19 N.U. Not Used
20 CVBS IN3 Composite Signal Input 3
21 N.U. Not Used
22 VCC VCC
23 N.U. (GND)
24 CVBS IN2 Composite Signal Input 2
25 N.U. Not Used
26 CVBS IN1 Composite Signal Input 1
27 N.U. Not Used
28 5.7V REG OUT 5.7V Output
29 C(Y/C) IN Chrominance Signal Input
30 Y(Y/C) IN Luminance Signal Input
31 V REG VCC DC 8.7V Input
32 FSC OUT Clock Output 3.58MHz
33 N.U. Not Used
34 N.U. Not Used
35 N.U. Not Used
36 N.U. Not Used
37 V RAMP F/B V Ramp Feed Back
38 V RAMP OUT Vertical Output
39 V RAMP CAP V Ramp OSC Capacitor
40 8.7 VREG OUT DC 8.7V Output
41 N.U. Not Used
42 H VCO F/B H Vco Feed Back
43 AFC FILT Horizontal AFC Filter
44 GND GND
45 FBP IN Flyback Pulse Input
46 H-OUT H Pulse Output
47 VCC Vcc
48 VCC Vcc
49 VCC Vcc
50 R OUT Red Output
51 G OUT Green Output
52 B OUT Blue Output
53 ACL IB-Input
54 N.U. Not Used
55 N.U. Not Used
56 SDA
I2C-BUS Controller Interface
(Data)
57 A-MUTE Audio Mute
58 SCL
I2C-BUS Controller Interface
(Clock)
59 N.U. (GND)
60 N.U. Not Used
61 S-SW Detect S Signal
62 VOLUME Volume
63 INPUTO Input Select 0
64 N.U. Not Used
65 N.U. Not Used
66 KEY-IN 1 Key Input 1 (Main)
67 PROTECT-2 Power Supply Protection
68 PROTECT-1 Power Supply Protection
69 KEY-IN 2 Key Input 2 (Main)
70 RCV-IN Input For Remote Control
Pin
No.
Signal Name Function