(3) Adjustment Procedures
Adjust both sides "6" to positional symmetry.
IVA-W200/IVA-W200E
Dot Clock
H_SYNC
Dot Clock
H_SYNC
2.64V
0.66V
2.64V
0.66V
Figure 7
Figure 6
Figure 8
Step
Adjustment Item
Connection
Test Point /
P.W.Board
Coordinates
Adjustment Procedures
1
VGH Adjustment
Figure 1
TP3817
( 5-B )
Adjust by VR3801 so that it may be set to 13V±0.05V.
2
VSS Adjustment
Figure 1
TP3816
( 5-B )
Adjust by VR3804 so that it may be set to -16V±0.05V.
3
FreeRun Adjustment
Figure 2
TP8029
( 4-F )
Adjust by VR8002 so that it may be set to
15.734kHz±0.1kHz.
4
CS Voltage Adjustment
Figure 3
TP8083
( 3-A )
Adjust by VR8003 so that it may be set to -3.5V±0.05V.
5
Screen Position
Adjustment
Figure 4
(1) DVD Test Disc (TDV-540A) Title 2, Chapter 16
is displayed. (WIDE MODE 1)
(2) Adjust by VR8001 so that the screen becomes a
center position. (Refer to Figure 6)
6
Dot Clock and H-SYNC
Waveform Adjustment
(IVA-W200 Model Only)
Figure 5
IC4312 Pin2
( 1-E )
TP6360
( 4-
F
)
(1) Set to FM mode.
(2) Observe the waveform of Dot Clock (IC4312 Pin2)
and H_SYNC (TP6360).
(3) Mark the 0.66V and 2.64V points of H_SYNC
by the vertical line. (Refer to Figure 7)
(4) Adjust by VR8001 so that the falling edge of Dot Clock
comes before 0.66V line. (Refer to Figure 7)
Permissible tolerance : ±5ns.
6
Dot Clock and H-SYNC
Waveform Adjustment
(IVA-W200E Model Only)
Figure 5
IC4312 Pin2
( 1-E )
TP6360
( 4-
F
)
(1) Set to FM mode.
(2) Observe the waveform of Dot Clock (IC4312 Pin2)
and H_SYNC (TP6360).
(3) Mark the 0.66V and 2.64V points of H_SYNC
by the vertical line. (Refer to Figure 8)
(4) Adjust by VR8001 so that the rising edge of Dot Clock
is put together to 2.64V line. (Refer to Figure 8)
Permissible tolerance : ±5ns.
7
Check the screen position after "Step6" adjustment.
When having shifted, "Step5" needs to be readjusted.
