SAMSUNG LW20M21C Service Manual Alignment & Adjustment

4 Alignments and Adjustments

LW17M24C/LW20M21C 4-1

4 Alignments and Adjustments

4-1 General Alignment Instuction

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.

2. Use the specified test equipment or its equivalent.

3. Correct impedance matching is essential.

4. 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 result.

5. Connect the TV only to an DC power source with voltage and frequency as specified on
the backcover nameplate.

6. Do not attempt to connect or disconnect any wire while the TV is turned on.
Make sure that the power cord is disconnected before replacing any parts.

7. To protect aganist shock hazard, use an isolation transform.

4-2 Factory Mode Adjustments

4-2-1 Entering Factory Mode

1. To enter “Service Mode” Press the remote -control keys in this sequence :

- If you do not have Factory remote - control

- If you have Factory remote - control

4-2-2 Factory Mode Tree

4 Alignments and Adjustments

4-2 LW17M24C/LW20M21C

1. Calibration

1. Calibration

VCTi
PC

2. Option

INFO Menu

3. W/B

4. ADC

5. VCTi 127

6. ACC/ACM

7. Test Pattern 0

8. Bus Stop off

9. Check Sum 0

10. Reset

T- VNC17(20) - PEU-0003 2004/04/20

(1) RF,VIDEO, S-VIDEO :

Factor y Mo de Cal ib r at ion V CTi Enter

(2) PC : adjust in VGA MODE.

Based on Master device

execute Auto Adjustment in Cross Hatch (also called Combination) (Model : 10, Pattern : 25)

(VI DEO SIGNA L GENE RATOR M S PG-925F)

After adjusting 16 Gray Pattern (Model : 10, Pattern : 17)

Fac

tory Mo de Cal ibr at i on PC Ent e r

(3) check 4.ADC of Factory Mode. Adjustment can be done as below.

Value variation can be 10~20.

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