Toshiba 50H81 Service Manual - Page 5

Servicing Precautions - convergence board

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GENERAL ADJUSTMENTS TO REMOVE CRT (Same procedure for R, G, B) 1. Remove CRT DRIVE Board, S. V. M. COIL and DEF. YOKE from CRT. 2. Remove Lens Assembly. 3. Detach CRT Anode Cap from CRT. 4. Remove CRT Assembly from CRT Mounting. CRT REPLACEMENT (Same procedure for R, G, B) Reverse the removal procedures except the followings. 1. Anode Cable should be replaced with new one. See "SERVICING PRECAUTIONS" shown below. 2. Install silicon (T461B) to the CRT, replace the Anode cable and put enough silicon again on around the Anode Cap as illustrated. CAUTION: Align the Anode cable as illustrated on page 4. ADJUSTING PROCEDURE IN REPLACING CRT 1. R.G.B. FOCUS ADJUSTMENT (page 6.) 2. PICTURE TILT ADJUSTMENT (page 6.) 3. USER CONVERGENCE CENTER CHECK (See owner's manual.) 4. CENTERING ADJUSTMENT (page 6.) 5. CONVERGENCE ADJUSTMENT (page 13.) 6. WHITE BALANCE ADJUSTMENT (page 12.) Adjustments are complete. Anode Cap Silicon (On shaded area) TSE3843W #23960136 15 ~ 25 mm 2 ~ 5 mm SPECIFIC INFORMATIONS SERVICING PRECAUTIONS I Do not use a magnetized screw driver for screws of Deflection Yoke and Velocity Modulation Coil to avoid magnetization of electron gun. Magnetization of electron gun will degrade basic function and result in unbalance of right and left shift of user static convergence, and result in no variable quantity. I When replacing the anode cap assembly (CRT) or anode lead assembly (F.B.T.), remove the anode lead holder from old one and attach the holder again to new anode lead. I Check the point of anode lead in a straight line, if it is winding, please revise it. Screw for D.Y Screw for SVM coil - 5 - Anode lead holder

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– 5 –
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
TO REMOVE CRT (Same procedure for R, G, B)
1.
Remove CRT DRIVE Board, S. V. M. COIL and
DEF. YOKE from CRT.
2.
Remove Lens Assembly.
3.
Detach CRT Anode Cap from CRT.
4.
Remove CRT Assembly from CRT Mounting.
CRT REPLACEMENT (Same procedure for R, G, B)
Reverse the removal procedures except the followings.
1.
Anode Cable should be replaced with new one.
See “SERVICING PRECAUTIONS” shown below.
2.
Install silicon (T461B) to the CRT, replace the Anode
cable and put enough silicon again on around the An-
ode Cap as illustrated.
CAUTION:
Align the Anode cable as illustrated on page
4.
ADJUSTING PROCEDURE IN REPLACING CRT
1.
R.G.B. FOCUS ADJUSTMENT (page 6.)
2.
PICTURE TILT ADJUSTMENT (page 6.)
3.
USER CONVERGENCE CENTER CHECK
(See owner's manual.)
4.
CENTERING ADJUSTMENT (page 6.)
5.
CONVERGENCE ADJUSTMENT (page 13.)
6.
WHITE BALANCE ADJUSTMENT (page 12.)
Adjustments are complete.
SERVICING PRECAUTIONS
■
Check the point of anode lead in a straight
line, if it is winding, please revise it.
Anode lead holder
■
Do not use a magnetized screw driver for screws
of Deflection Yoke and Velocity Modulation Coil to
avoid magnetization of electron gun.
Magnetization of electron gun will degrade basic
function and result in unbalance of right and left
shift of user static convergence, and result in no
variable quantity.
■
When replacing the anode cap assembly (CRT) or
anode lead assembly (F.B.T.), remove the anode
lead holder from old one and attach the holder
again to new anode lead.
Anode Cap
Silicon
(On shaded area)
TSE3843W #23960136
2 ~ 5 mm
15 ~ 25 mm
Screw for
D.Y
Screw for SVM coil