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Before starting convergence adjustments:

1  Perform FOCUS, VLIN and VSIZE adjustments.

2.  Set BRIGHTNESS control to minimum.

3.  Feed in dot pattern.

1.  Adjust V. STAT magnet to converge red, green and blue dots in the 

center of the screen (Vertical movement adjust S V.STAT RV1750 to 
converge).

B

G

R

Center dot

V.STAT magnet

RV1750

V.STAT

B

G

R

2.  Tilt the V. STAT magnet and adjust static convergence to open or 

close the V. STAT magnet.

 

When the V. STAT magnet is moved in the direction of arrow a and b, 
red, green, and blue dots move as shown below:

B

R

G

B

R

G

R

G B

B

G R

1

2

b

b

b

b

b

b

b

a

a

b

a

a

a

a

3

R

G

B

B

G

R

If the blue dot does not converge with the red and green dots, peform 
the following:
1.  Move BMC magnet (a) to correct insuffi cient H.Static convergence.

2.  Rotate BMC magnet (b) to correct insuffi cient V.Static convergence.

3.  After adjusting the BMC magnet, repeat Beam Landing Adjustment.

BMC

 MA
GNET

PURITY

V.STAT

b

BMC magnet

a

Before performing this adjustment, perform Horizontal  and Vertical 
Static Convergence Adjustment.
1.  Slightly loosen defl ection yoke screw.

2.  Remove defl ection yoke spacers.

3.  Move the defl ection yoke for best convergence as  

 

shown below:

B

G

R

G

B

R

G

B

R

R

R

G

B

G

B

G

B

R

B

G

R

G

B

G

B

R

R

G

B

G

G

B

R B

R

R

4.  Tighten the defl ection yoke screw.

5.  Install the defl ection yoke spacers.

1. Input crosshatch pattern.

2.  Adjust PICTURE QUALITY to standard, PICTURE and 

BRIGHTNESS to 50%, and OTHER to standard.

3  Adjust the Horizontal Convergence of red and blue dots by tilting the 

TLH plate on the defl ection yoke.

YCH

TLV

CV
Board

RV1750

 V.STAT

TLH Plate

  B R      R B
(R)(B)  (B)(R)

TLH+
TLH-

4.  Adjust XCV core to balance X axis.

5.  Adjust YCH VR to balance Y axis.

6.  Adjust vertical red and blue convergence with V.TILT (TLV VR.) 

 

Note: Perform adjustment 3-6 while tracking items 1 and 2.

1.  Affi x a permalloy assembly corresponding to the misconverged areas: 

b

a

c

d

a

b

d

a-d: screen-corner

misconvergence

c

1.  Adjust FOCUS control for best pictures.

Focus (FV)

Screen (G2)

1.  Input a dot pattern.

2.  Set the PICTURE and BRIGHTNESS controls at minimum and 

COLOR control at normal.

3.  Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as 

shown below so that voltages on the red, green, and blue cathodes 
are 160 ± 2VDC.

Pedestal

160 – 2VDC

Ground

±

4.  Observe the screen and adjust SCREEN (G2) VR in FBT to obtain 

the faintly visible background of dot signal. 

3-1.  X R565 CONFIRMATION METHOD 

The following adjustments should always be performed when replacing 
the following components which are marked with Y on the schematic 
diagram:

DY, T585, CRT, IC001, IC561,
IC600, C506, C507, C508, T511,
L510, C588, L588, C566, C561,
C563, D567, D568, D566, PH602,
R567, R568, R565, R566, R562,
R563, R561, R528……....A Board

HV HOLD-DOWN
R565

Part Replaced (Y)

Adjustment (X)

1.  Using a Variac, apply AC input voltage: 120 ± 2 VAC.

2.  Turn the POWER switch ON.

3.  Input a white signal and set the PICTURE and BRIGHTNESS 

controls to maximum.

4.  Confi rm that the voltage between C566 (+) or TP30 and ground is 

more than 97 VDC.

1.  Connect the current meter between Pin 11 of the FBT (T585) and the 

PWB land where Pin 11 would normally attach (See Figure 1 on the 
next page).

2.  Input a dot signal and set PICTURE and BRIGHTNESS to minimum: 

IABL = 100 ± 100µA.

3.  Confi rm the voltage of A Board TP-23 is 135.6 ± 1VDC.

4.  Connect the digital voltmeter and the DC power supply via Diode 

1SS119 to C566 (+) and ground (See Figure 1 on next page).

5.  Increase the DC power voltage gradually until the picture blanks out.

6.  Turn DC power source off immediately.

7.  Read the digital voltmeter indication standard < 117.0 VDC.

8.  Input a white signal and set PICTURE and BRIGHTNESS to 

maximum: IABL = 1350 ± 100µA.

9.  Repeat steps 4 through 7.

If the setting indicated in Step 2 of Hold-Down Operation Confi rmation 
cannot be met, readjustment should be performed by altering the 
resistance value of R565 component marked with X. 

+

IABL

ABL

T585

FBT

range

-

Ammeter

3.0 mA  DC

A

Note: The following adjustments should always be performed when 
replacing the following components, which are marked with Y on the 
schematic diagram on the A Board:

   A BOARD:       Y  IC600, PH602

1.  Using a Variac, apply AC input voltage: 130 + 2.0 / - 0.0 VAC.

2.  Input a DOT pattern at Q.C.

3.  Set the PICTURE  and the BRIGHTNESS controls to minimum.

4.  Confi rm the voltage of A Board between TP-23 & Ground is =135.6  ± 

1VDC.

5.  If step 4 is not satisfi ed, replace the components listed above, then 

repeat steps 1 through 3.