15. Convergence Adjustment

Purpose: To obtain proper convergence of red, green and blue beams.

Symptom of Misadjustment: If Convergence Adjustment is incorrect, the edge of white letters may have color edges.

 

Test Point

Adj. Point

Mode

Input

 

 

 

 

 

 

 

 

 

 

 

 

C.P. Magnet (RB)

 

Dot Pattern

---

C.P. Magnet (RB-G)

---

or

 

 

Deflection Yoke

 

Crosshatch

 

 

 

 

 

 

Tape

M. EQ.

 

Spec.

 

 

 

 

 

 

 

 

---

Pattern Generator

See below

 

 

 

 

 

 

 

Figure

 

 

4.Fix the C.P. Magnets by tightening the Ring Lock.

5.Remove the DY Wedges and slightly tilt the Deflection Yoke horizontally and vertically to obtain the best overall convergence.

6.Fix the Deflection Yoke by carefully inserting the DY Wedges between CRT and Deflection Yoke.

CRT

DY WEDGE

COIL SCREW PURITY RB RB-G

RING LOCK

SCREW

C.P. MAGNET CLAMPER

C.P. MAGNET

COIL CLAMPER

DEFLECTION YOKE

Fig. 6

C.P. MAGNET (RB)

RR

GG

BB

Fig. 7

C.B. MAGNET (RB-G)

RB

RB G

G

Fig. 8

1.Set the unit to the AUX mode which is located before CH2 then input a dot or crosshatch pattern.

2.Loosen the Ring Lock and align red with blue dots or crosshatch at the center of the screen by rotating (RB) C.P. Magnets. (See Fig. 7.)

3.Align red / blue with green dots at the center of the screen by rotating (RB-G) C.P. Magnet.

(See Fig. 8.)

1-7-7

T2202EA

Page 27
Image 27
Magnavox MWC24T5 service manual Convergence Adjustment, Magnet RB Magnet RB-G