JVC 340 SC - Manual (Page 105)

Chapter 3---Service Adjustments
Model 330, 340SC, 370SC Service Manual 3-15
4. Pull out the Horizontal Deflection board and verify that the horizontal scan
jumper is properly inserted for front (J500) or rear (J501) projection,
depending on your application (refer to Figure 3-6 and Table 3-1). Change
jumper if necessary.
5. Replace the card cage cover.
6. Replace the rear projector cover.
Inverted Vertical Jumpers
The Vertical Invert jumpers invert the image vertically for use in some situations
that use mirrors or ceiling projections. Figure 3-7 illustrates the location of the
jumpers on the Vertical Deflection Board (the fourth board from the rear of the
projector). The Model 330, 340SC and 370SC Projectors are shipped in the
normal vertical projection position with vertical jumpers in J200, J300 and J400
and convergence jumpers in J500, J600, and J700. For other orientations, change
the jumpers in accordance with Table 3-1.
NOTE: Do not turn projector upside down or at 90º!
J501 J500
J701 J700
J301
J300
J401
J400
J601
J600
J201
J200
Figure 3-8 Vertical Scan Jumpers on the Vertical Deflection Board.
To change jumpers on the Vertical Deflection Board:
1. Turn power off at the projector and wait about five (5) minutes for the arc
lamp to cool.
2. Remove the rear cover from the projector.
3. Remove the cover from the card cage.