Ic Block Diagram - Prima LC-20S3 Service Manual

IC block diagram

1.VCT4993R
VCT4993R (N102) is a integrative chip of digital IF amplifier, video decode, sound processing,
image processing and CPU, it has teletext decode function and 8M FLASH (N103) and 1M SRAM,
there can deposit 250 page teletext. It has 10 VIDEO input, 3 VIDEO output, 3 SOUND input and
output, analog RGB output, ITU656 of digital signal output.
VCT4993R PIN instructions:
PIN function
41 SDA_M
42 SCL_M
44 CSZ
45 SCART_SWITCH
47 IR
48 MUTE
50 INT
58 VOUT2
60 VIN1
62 Y_IN
63 C_IN
66 SCART_CVBS
Figure 1-1 VCT4993R internal block diagram
PIN function
78 656I02
78 656I01
79 656I00
80 AUDIO_SEL_1
81 AUDIO_SEL_0
82 656CLK
97 BKLON
98 STANDBY
109 IF IN+
110 IF IN-
112 TAGC
113 AIN1R
10