Panasonic BT-H1350Y Service Manual page 33

BT-H1350Y
Notes:
Purity Magnet 1. Wedge A shown in Fig.35 should be fixed within a
R-B Static
Convergence
Magnet
Convergence
Magnet
range of 0° ~ 30° to the left of the vertical line as shown.
. After inserting wedge A, insert wedges B and C. The
wedges should be set 120° apart from each other.
. Be certain that the four wedges are firmly fixed and the
Deflection Yoke is tightly clamped in place. Otherwise
the Deflection Yoke may shift it position and cause a
loss of convergence and purity.
CUT OFF ADJUSTMENT (L-P.C. board)
15
EQUIPMENT TO USED
Oscilloscope
Video Generator
2. INITIALIZE CONDITION (D-P.C. board)
Rest CR DIRE каво оао Center
fra ^R OB ЕР а Бард Mets Center
РЕ -"""""""""' Center
аЗ
В СШ Еа оь а
A Center
. Read the voltage (Black standard level to ground) on
COIS? MMP: SECC ბებებებსბსასწაეაეაეაეააეაეე" 9300° K oscilloscope.
. ADJUSTMENT PROCEDURE
1. Set the input selector switches to LINE A.
2. Set the TV System selector switch to NTSC 3.58.
3. Input a Cross Hatch pattern signal to VIDEO input
terminal.
4. Connect an Oscilloscope to IIRA, and ground.
Video Generator
LINE A
L-P.C. board
Oscilloscope
. Adjust the Screen control on FBT so that the Black stan-
dard signal level is 955V.
Note: Black standard signal is output from the IC for auto
white balance and appears after the vertical blank-
ing pulse. Do not adjust at black level in video
signal.
V. BLK Period BLack standard signal
Black level in
Video Signal
Fig. 37