Samsung CW25M064NRXXEC specifications Alignment and Adjustments, General Alignment Instructions

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Alignment and Adjustments

2. Alignment and Adjustments

2-1 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.

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.

8.To protect against shock hazard, use an isolation transformer.

2-2 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.

2-3 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 30 KV under any conditions.

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Contents Color Television Receiver Index SpecificationsHigh Voltage Check Alignment and AdjustmentsGeneral Alignment Instructions Automatic DegaussingFocus Adjustment Screen AdjustmentWhite Balance Adjustment Factory Adjustment When adjusting Screen Voltage and White BalanceFactoy Mode OSD Min Max Remark Amp Deflection Ntsc Offset Video Adjust VSU BST Gainb YC Delay Eeprom G2 Adjust CW25M064NRXXEC Exploded View & Parts ListElectrical Parts List RELAY-POWER5VDC,530MW,10000MA,1FORMA,15 DIODE-SWITCHING1N4148,75V,150MA,DO-35,TDIODE-SWITCHINGBAV21,250V,200MA,DO-35,T SWITCH-PUSH250V,5A,DPST,ON-OFFMetal OXIDE18KOHM,5%,2W,AG,TP,6X16MM IC-POSI.ADJUST REG.431,TO-92,3P,4.58MILIC-VOL. DETECTOR7025,TO-92,3P,-,PLASTIC Metal OXIDE270OHM,5%,2W,AG,TP,6X16MMCERAMIC,MLC-AXIAL1NF,10%,50V,Y5P,TP,3 Metal PLATE0.27OHM,10%,5W,CL,TP,5X14XCERAMIC,DISC0.01NF,0.25PF,500V,C0G,TP CERAMIC,MLC-AXIAL0.33NF,10%,50V,Y5P,TINDUCTOR-AXIAL10UH,10%,3070 FUSE-AXIAL LEAD125V,7A,-,EPOXY,2.4X7.1MFUSE-AXIAL LEAD125V,10A,FAST-ACTING,EPO EYELETID1.5,OD2,L2.8,NI+SN,BSP3-1/2HSCREW-MACHINERH,+,M3,L6,ZPCBLK,SWRCH1S.N.A CONNECTOR-FBT FIX PINJM-3500,CPTTV,0.36IC-VIDEO AMP6101,ZIP,9P,-,SINGLE,-,PLAS EYELETID1.5,OD2,L2.8,NI+SN,BSP3-1/2H CCM1CERAMIC,DISC4.7NF,20%,3KV,Y5U,TP,16X5 AA60-40014A PIN-GT,ASSYAUTOCERAMIC,DISC10NF,10%,50V,Y5V,TP,7X3MM CERAMIC,DISC0.068NF,5%,50V,SL,TP,5X3MMain TOP PCB DiagramsMain Schematic DiagramsPower CRT Jack PIP Module CRT Control A/V Side
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