Philips DVDR615 - IC7402: STV6618 MOBO Board, Video Switch Matrix

Circuit-, IC descriptions and list of abbreviations
EN 146 DVDR615/699.
IC7402: STV6618 MOBO Board, Video Switch Matrix
Figure 9-16
1.2 Pin Description
Pin No. Symbol Description
1 Y/CVBSIN_TUN Y/CVBS Input from Tuner
2 DIGOUT3 Digital Output Pin 3
3 GND1 Ground Supply 1 for Video Inputs
4 CVBSIN_ENC CVBS Input from Encoder
5 DECV Video decoupling capacitor
6 CIN_ENC Chroma Input from Encoder
7 YIN_ENC Y Input from Encoder
8
V
CC
+5 V Power Supply for Video Inputs
9 R/PR/CIN_ENC Red or Pr or Chroma Input from Encoder
10 G/YIN_ENC Green or Y Input from Encoder
11 B/PBIN_ENC Blue or Pb Input from Encoder
12 GND2 Ground Supply 2 for Video Inputs
13 B/PBIN_AUX Blue or Pb Input from Auxiliary (SCART2 or external Cinch)
14 DIGOUT4 Digital Output Pin 4
15 G/YIN_AUX Green or Y Input from Auxiliary (SCART2 or external Cinch)
16 DIGOUT5 Digital Output Pin 5
17 R/PR/CIN_AUX Red or Pr or Chroma input from Auxiliary (SCART2 or external Cinch)
18 DIGOUT6 Digital Output Pin 6
19 Y/CVBSIN_AUX Y/CVBS Input from Auxiliary (SCART2 or external Cinch)
20 VCCB_REC Video Output Recorder Buffer Supply Pin
21 Y/CVBSOUT_REC Y/CVBS Output to Recorder
22 GNDB_REC Ground Supply for Recorder Buffer
23 COUT_AUX Chroma Output to Auxiliary (SCART2 or external Cinch)
24 VCCB1 Video Output Buffer Supply Pin
25 Y/CVBSOUT_AUX Y/CVBS Output to Auxiliary (SCART2 or external Cinch)
26 GNDB Ground Supply for Video Buffer
27 B/PBOUT_TV Blue or Pb Output to TV (SCART1 or external Cinch)
28 C_GATE External Transistor Command for Bidirectinnal B/C SCART I/O
29 G/YOUT_TV Green or Y Output to TV (SCART1 or external Cinch)
30 VCCB2 Video Buffer
31 R/PR/COUT_TV Red or Pr or Chroma Output to TV (SCART1 or external Cinch)
32 VCCB3 Video Output Buffer Supply Pin
33 Y/CVBSOUT_TV Y/CVBS Output to TV (SCART1 or external Cinch)
34 FBOUT_TV Fast Blanking Output to TV (SCART1)
35 FBIN_AUX Fast Blanking Input from Auxiliary (SCART2)
http://www.jdwxzlw.com/?fromuser=华盛维修
家电维修资料网，免费下载各种维修资料