Connection And Setting Up For Adjustment; Dc Current Adjustment; H Hold, V Hold Coarse Adjustment - Panasonic WV-BM90 Service Manual

Remove four screws holding CRT and remove CRT.
Remove four screws
Fig. 3-4
4 CONNECTION AND SETTING UP FOR
ADJUSTMENT
.
Connect the coaxial cable between the VIDEO OUTPUT
terminal of BNV Camera WV-BL90 and CAMERA INPUT
connector 1,2,3 or 4 of Video Monitor WV-BM90.
Approx.
Video Monitor
12 -
ADJUSTMENT
Test Point
Adjust
Disconnect all cameras from the Camera input connectors
Turn ON the power switch.
Connect the digital voltmeter to TP2.
l
Adjust VRl (12V ADJ) for 12V 2 O.lV.

DC current adjustment

Adjust
Observe DC current meter
Connect the DC current meter between the video camera
Monitor WV-BM90.
l
Turn ON the power switch.
Adjust VRl (DC CURRENTADJ) for 22OmA t 7mA.
l
Confirm that the DC current of CAMERA INPUT
connectors 2,3 and 4.

H hold, V hold coarse adjustment

Adjusts VR2 (SUB BRIGHT)
VR5 (H. HOLD)
l
Set the controls and switches on the volume board and
Control board as follows.
Mode Selection switch
Input Selection switch
Contrast Control
Bright Control
Vertical hold control
Horizontal hold control
Connect the completely aligned video camera WV-BL90
to CAMERA INPUT connector
Aim the camera atthe resolution chart (YWV1400RB99).
Turn ON the power switch.
Adjust the VR2 (SUB BRIGHT) so that the raster will just
appear.
Adjust VRl l(V.HOLD) and VR5(H.HOLD) so that the circle
of the resolution chart on the Monitor screen becomes '. Ia
center position.
Main board
Main board
Control board
Main board
Main board
Control board
ON position
EXT position
Mechanical Center position
Mechanical Center position
Mechanical Center position
Mechanical Center position
or 4 of Video Monitor