Samsung samsung dsb-b350w free download

File name samsung dsb-b350w.pdf

5. Troubleshooting NO POWER (LED OFF) Power switch and No power plug pin is Connect switch and power plug pin. connected? Yes SMPS OK? check output voltage No Check SMPS. (3.3V,5V,12V,BT,17V, 24V) Yes No Front PCB ass'y is OK? Check fr ont PCB ass'y. Yes U1 (12, 13) signal? No Check X1 : 27MHz CLK Yes U1 (2) signal? No Check U1 : 27MHz CLK Yes 120MHz CLK is No Check R26 occurred at R26 Yes Check U2 Samsung Electronics 5-1 Troubleshooting NO LOCKING U901(40,14) No Voltage 3.3V? Check SMPS 3.3V C918:2.5V? Yes No Check U12(2) No U902 input voltage Check SMPS 5V. C926: 5V? 5V output? Yes Yes U9 LNB Voltage No No HOR: 17~19V Check U9(1,2) Check SMPS VER:12.5~14V input voltage 17V, 24V. Yes Check 12C of U901 No (21, 22) is h high? Check U901. Yes CHU307 Data, control No CIIC1(40~50,53~63) No Check U2. appear at RP12,RP13 data control signal RP14? is OK? Yes Yes Check U901 Check CIIC1. 5-2 Samsung Electronics