Philips LC3141 Service Manual - Page 5

5. Block diagrams & Wiring diagram BLOCK DIAGRAM IR Receiver Keyboard Leds I/O controller Downstream USB Audio in Data Audio in Video Data Video Audio control I2C I2C I2C EEPROM Flash memory I2C CVBS YC I2C DATA HD Video decoder AD conversion YUV RGB PW 166 Scaler Frame buffer Microprocessor digital R G B Switch Clock YCbCr RGB DDC EEPROM Reset LC3131/LC3141 5-1 Audio ampl. Drive electronics sync Drive electronics video Lamp Supply LCD panels R G B UHP lamp Standby power supply +V standby Safety Switch +V Mains Power supply CL 26645004_026.eps 130502 Small Signal Electronics USB S11 USB S7 IO I2C Audio A/V + DATA S8 Audio I2C L,R 1616 L,R I2C CVBS S3 YC Video proc. Component Video Digital YUV Digital RGB I2C S10 RGB HD switch S2 DATA A/D HV I2C H S4 V Scaling R Microprocessor OSD G B S5 RAM ROM S6 Clock gen. I2C S9 Fan Control 1445 H V R G B CL 26645004_027.eps 130502 PCS 107 366 5-2 LC3131/LC3141 S2 DATA AD CONVERSION 7202 AD9886 759 terminat PWTERM +5 7000 AD8183 6 RAD 119 R_DATA 1 G_DATA 3 5 B_DATA 8 BPBCB 10 GYY 12 RPRCR 20 GAD 110 18 BAD 100 16 +3V3 1 GRE 0-7 A D GRO 0-7 GGE 0-7 A D GGO 0-7 GBE 0-7 A D GBO 0-7 4 DDCSCL DDSSDA SCL SDA 7022 HEF4053 7020 EEPROM S10 91 138 92 CONTROL PLL CLOCK GEN 140 2 84 93 RXD-TXD GVS GHS BLKSPL GCOAST CL 26645004_028.eps 130502 S3 VIDEO PROCESSING +3V3 7304 SAA7118 N4 LUM CVBS CHROMA RPRCR GYY BPBCB J2 K1 G4 VIDEO COMB DECODER FILTER D1 A D J3 61 SYNC PROCESS G13 UV 0-7 D14 G14 Y 0-7 K11 K12 K14 M14 VHS VVS VCLK PCS 107 367 I2C N9 P10 SCL SDA L9 CL 26645004_029.eps 1030502