Emerson CR202EM9 Manuel de service télécharger pdf (Page 20)

5-5 P7150EA

12. Cut-off Adjustment

Purpose: To adjust the beam current of R, G, B, and

screen voltage.

Symptom of Misadjustment: White color may be

reddish, greenish or bluish.

Note: Screen Control FBT --- Main CBA

FBT = Fly Back Transformer

Use service remote control unit

1. Degauss the CRT and allow CRT to operate for 20

minutes before starting the alignment.

2. Input the Black Raster Signal from RF Input.

3. Enter the Service mode. (See page 5-1.)

4. Press [VOL n] button on the service remote

control unit and select “C/D” mode. (Display

changes “C/D,” “7F,” “SOUND TYPE,” “VIDEO,”

“1000,” “YUV MEMORY,” “TUNER A/M/S,” “QAM,”

“DTV-H,” “D-SOUND,” and “DL V-CHIP” cyclically

when [VOL n] button is pressed.) then press “1.”

The display will momentarily show “CUT OFF R”

(R= Red). Now there should be a horizontal line

across the center of the picture tube. If needed,

turn the screen control on the flyback in a

clockwise direction gradually until the horizontal

line appears. Adjust the Red Cut off by pressing

[CH o / p] buttons. Proceed to Step 5 when the

Red Cut off adjustment is done.

5. Press [2] button. The display will momentarily

show “CUT OFF G” (G = Green). Adjust the Green

Cut off by pressing [CH o / p] buttons. Proceed to

step 6 when the Green Cut off adjustment is done.

6. Press [3] button. The display will momentarily

show “CUT OFF B” (B = Blue). Adjust the Blue cut

off by pressing [CH o / p ] buttons. When done

with steps 4, 5 and 6 the horizontal line should be

pure white, if not, then attempt the Cut off

adjustment again.

13. White Balance Adjustment

Purpose: To mix red, green and blue beams correctly

for pure white.

Symptom of Misadjustment: White becomes bluish

or reddish.

Note: Use service remote control unit

1. Operate the unit more than 20 minutes.

2. Face the unit to east. Degauss the CRT using

Degaussing Coil.

3. Input the White Raster (APL 100%).

4. Set the color analyzer to the CHROMA mode and

after zero point calibration, bring the optical

receptor to the center on the tube surface (CRT).

5. Enter the Service mode. (See page 5-1.) Press

[VOL n] button on the service remote control unit

and select “C/D” mode. (Display changes “C/D,”

“7F,” “SOUND TYPE,” “VIDEO,” “1000,” “YUV

MEMORY,” “TUNER A/M/S,” “QAM,” “DTV-H,” “D-

SOUND,” and “DL V-CHIP” cyclically when [VOL

n] button is pressed). Then press [8] button on the

service remote control unit.

6. Press [4] button on the service remote control unit

for Red adjustment. Press [5] button on the

service remote control unit for Blue adjustment.

7. In each color mode, Press [CH o / p] buttons to

adjust the values of color.

Test Point Adj. Point Mode Input

---

Screen-Control

[CH o / p]

buttons

Black

Raster

Tape M. EQ. Spec.

---

Pattern

Generator

See Reference

Notes below.

Figure

Fig. 2

Pattern Generator

Ext. Input

Test Point Adj. Point Mode Input

Screen

[CH o / p]

buttons

White

Raster

(APL

100%)

Tape M. EQ. Spec.

---

Pattern

Generator,

Color Analyzer

See below

Figure

Fig. 3

Color Analyzer

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 55 56

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Emerson CR202EM9 Manuel de service Page 20

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