Picture Tilt Adjustment; Centering Adjustment; Vertical Height And Linearity Adjustment; Focus Fine Adjustment - Panasonic WV-BM90 Service Manual

(4) Picture tilt adjustment

Deflection coil
Adjust
Loosen the deflection coil holding
Turn the deflection coil until the raster on the monitor
0
screen is straight.
0 Carefullytighten the deflection coil holding

(5) Centering adjustment

Adjust Centering magnets
0 Adjust the centering magnets until the raster comes to
the center of monitor screen becomes true circle.
0 Adjust L8 (H. WIDTH) so that the circle of the resolution
chart on the Monitor screen.
(6)

Vertical height and linearity adjustment

Adjust VR4 (V.LIN)
Adjust VR3 (V. HEIGHT) and V. LIN VR4 so that the circle in
0
the chart is nearly a true
(7) Sub-brightness adjustment
VR2 (SUB BRIGHT)
Adjust
0 Set the controls on the volume board as follows.
Contrast Control
Bright Control
Turn VR2 (SU8 BRIGHT) fully clockwise and then turn it
0
back so that the raster will just go out.
0 Turn VR8 (CONTRAST) at mechanical center position.
hold
H hold, V fine adjustment
Adjust
Disconnect all cameras from the camera input connector
0
0 Connect the frequency counter to pin 2 (Yellow wire) of
deflection coil and adjust the VR5 (H HOLD) on the Main
board for 158KHz f 50Hz.
0 Connect the frequency counter to Pin 3 (Red wire) of
deflection coil and adjust the VRll(V HOLD) on the
control board for 47.3Hz 2 0.5Hz.
screw.
screw.
Main board
Main board
Main board
circle.
Main board
Fully counter clockwise
Mechanical Center position
Main board
Control board

Focus fine adjustment

(9)
Adjust
VR6 (FOCUS)
0 Adjust VR6 (FOCUS) for best focus in the monitor.
Main board