Samsung CW683CW free download

File name Alignment & Adjustment.pdf

Alignment and Adjustments 4. Alignment and Adjustments 4-1 General Alignment Instructions 1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync and focus. 2. Observe the picture for good black and white details. There should be objectionable color shading; if color shading is present, demagnetize, perform purity and convergence adjustments described below. 3. Use the specified test equipment or its equivalent. 4. Correct impedance matching is essential. 8. To protect against shock hazard, use an isolation transformer. 5. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV. When inserting signal markers, do not allow the marker generator to distort test results. 6. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate. 7. Do not attempt to connect or disconnect any wires while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts. 4-2 Automatic Degaussing A degaussing coil is mounted around the picture tube, so that external degaussing after moving the TV should be unnecessary. But the receiver must be properly degaussed upon installation. The degaussing coil operates for about 1 second after the power is switched ON. If the set is moved or turned in a different direction, the power should be OFF for at least 10 minutes. If the chassis or parts of the cabinet become magnetized, poor color purity will result. If this happens, use an external degaussing coil. Slowly move the degaussing coil around the faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil to a distance of about 6 feet before turning power OFF. If color shading persists, perform the following Color purity and Convergence adjustments. 4-3 High voltage Check CAUTION : There is no high voltage adjustment on this chassis. The B+ power supply should be +135 volts (with full color- bar input and normal picture level). 1. Connect a digital voltmeter to the second anode of the picture tube. 2. Turn on the TV. Set the Brightness and Contrast controls to minimum (zero beam current). 3. Adjust the Brightness and contrast controls to both extremes. Ensure that the high voltage does not exceed 32 KV under any conditions. Samsung Electronics 4-1 Alignment and Adjustments 4-4 Dynamic Focus Adjustment 1. A dynamic focus adjustment should be done after replacing the CRT PCB, FBT or CRT. 2. Input a crosshatch pattern. 3. Enter " STANDARD " in video mode. 4. Turn the Dynamic focus VR fully clockwise (maximum).( ) 5. Turn the Static focus VR fully counterclockwise (maximum).( ) 6. Slowly turn the static focus VR counterclockwise. Adjust until the vertical line in the middle of the screen has maximum clarity.( ) 7. Slowly turn the dynamic focus VR (clockwise) and adjust the 3rd horizontal line for maximum clarity.

File name Schematic Diagram.pdf

Schematic Diagrams 10. Schematic Diagrams 10-1 MAIN 1 TP07 TP01 TP10 TP08 TP02 TP09 TP03 TP09 TP01 TP06 TP10 TP04 TP03 TP08 TP04 TP02 TP05 TP05 TP06 TP07 : Power Line : Signal Line Samsung Electronics 10-1 Schematic Diagrams 10-2 MAIN 2 TP11 TP12 TP13 TP12 TP13 TP11 TP14 TP25 TP15 TP14 TP25 TP15 10-2 : Power Line : Signal Line Samsung Electronics Schematic Diagrams 10-3 MAIN3 TP22 TP16 TP23 TP23 TP17 TP24 TP18 TP17 TP16 TP18 TP22 TP19 TP21 TP20 TP24 TP19 TP20 TP21 : Power Line : Signal Line Samsung Electronics 10-3 Schematic Diagrams 10-4 MAIN 4 TP32 TP26 TP33 TP27 TP26 TP33 TP27 TP35 TP34 TP28 TP35 TP29 TP28 TP32 TP31 TP34 TP30 TP29 TP30 TP31 : Power Line : Signal Line 10-4 Samsung Electronics Schematic Diagrams 10-5 PIP : Power Line Si l Li Samsung Electronics 10-5 Schematic Diagrams 10-6 CRT, SIDE AV, VIDEO SWITCH CRT SIDE AV VIDEO SWITCH : Power Line : Signal Line 10-6 Samsung Electronics Schematic Diagrams 10-7 DOUBLE FOCUS, CONTROL DOUBLE FOCUS CONTROL : Power Line Si l Li Samsung Electronics 10-7