Electronic Viewfinder (E. Vf) Adjustment; Tilt; Centering; Vertical Scanning - JVC GR-SXM335U Service Manual

3.3

ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT

Notes:
• Unless otherwise specified, all measurement points and
adjustment parts are located on E. VF board.
• After adjustment or replacement of the deflection yoke or
the centering magnet, fix it by the band as shown the figure
below.
TOP VIEW
CRT
Fig. 3-3-1 E. VF
• After adjustment is completed, compare the picture on the
E. VF screen with the monitor TV.

CENTERING

CRT
Fig. 3-3-2 E. VF
VR7003

FOCUS

CN7002
60 E. VF PWB ASSY
VR7001
CN7001
V. SIZE
Fig. 3-3-3 E. VF board
3.3.1

Tilt

Subject
Mode
Equipment
Measurement point
Adjusting part
Specification
3-4
CENTERING
MAGNET
STOPPER
MAGNET
STOPPER
F.B.T
T7001
VR7002
BRIGHT
• Alignment tape
• Stairstep
• PB
• E. VF
• E. VF screen
• Deflection yoke
• The picture is visible as
same as monitor TV.
1) Put the deflection yoke to the most inner side of CRT neck
first. Then fix the stopper temporary.
2) Adjust the tilt of picture on the E. VF screen by tilting the
deflection yoke.
3) Fix the stopper completely.
3.3.2 Centering
Subject • Alignment tape
• Stairstep
Mode • PB
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part • Centering magnet (CRT assy)
Specification • The center of the E. VF screen
1) While observing the viewfinder screen, adjust the centering
magnet to locate the stairstep in the center of the view-
finder screen.
3.3.3

Vertical scanning

Subject • Camera picture
Mode • EE
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part • VR7001 (V. SIZE)
Specification • Normal picture amplitude
1) Observing the viewfinder screen, adjust VR7001 for
normal picture amplitude.
3.3.4

Brightness

Subject • –
Mode • EE
• Lens closed
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part • VR7002 (BRIGHT)
Specification • The CRT raster is just barely
visible
1) Close the lens with the cap and adjust VR7002 so that
the raster of the CRT is just visible in the E. VF.
3.3.5 Focus
Subject • Camera picture
Mode • EE
Equipment • E. VF
Measurement point • E. VF screen
Adjusting part • VR7003 (FOCUS)
Specification • The center area is clear and
defined
1) While observing the viewfinder screen, adjust VR7003
so that the picture at the central area of the screen is
clear and defined.