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PDF Contains
Technical Data, Mechanical data, Detailed Circuit diagram with components value, PCB layout. Actual PCBs Print. Component List, Spare parts code list and Input output detail. It cover LBB1211, LBB1212, LBB1213, LBB1216, LBB1217.
It is the actual Service Manual for SQ10
3-3. SCREEN (G2)
LAYOUT OF EACH CONTROL
Purity magnet BMC (Hexaploe) magnet V STAT convergence magnet Y-splitting axis correction magnet
SCREEN G2 ADJUSTMENT
1. 2. 3. 4. Input a dot signal from the pattern generator. Set the Picture, Brightness and Colour to minimum. Apply 175V DC from an external power supply to the R, G and B cathodes of the CRT. Whilst watching the picture, adjust [SCREEN G2] located on the FBT [flyback transformer] to the point just before the flyback return lines disappear.
3-4. FOCUS
1. 2. 3 Receive a television broadcast signal. Normalise the picture setting. Adjust the focus control located on the FBT [flyback transformer] to obtain the best focus at the centre of the screen. Bring only the centre area of the screen into focus, the magenta-ring appears on the screen. In this case, adjust the focus to optimize the screen uniformly.
Fig 3-6 Note : If you are unable to adjust the corner convergence properly, this can be corrected with the use of permalloys.
a
b
a-d: screen-corner convergence defect c d
FOCUS
SCREEN (G2)
Permalloy Assy X-4387-214-1
Convergence adjustment with permalloy.
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