Sony BVP-550, Maintenance Manual

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4-37(E)
BVP-550
BVP-550P
4-4. Overall Electrical Alignment
4-4-15. White Shading Adjustment
Note:
• This adjustment could not be correctly performed if the
uneven white patten is used, luminance is not correct, or
lens iris and lens zoom are not in good conditions.
Equipment : Waveform monitor
Test point : TEST OUT connector
Object
: Full white pattern
Preparations:
Connect the waveform monitor to the TEST OUT connec-
tor.
ENC/RGB (on the side panel)
→
ENC
Set the menu as follows.
MENU : Paint
PAGE : Knee/W.Clip (P6)
ITEM : Knee
→
Off
Zoom of the lens
: Shoot the fully occupied white area
of the pattern box in the full under-
scanned monitor frame adjusting the
zoom control.
Iris of the lens
: Adjust the iris control of the lens to
satisfy the white level A.
A = 80
±
5 IRE (for NTSC)
A = 560
±
14 mV (for PAL)
Adjustmnet procedures:
1. Set the waveform monitor as follows.
• LUM mode
• VOLTFULL SCAN range
→
0.5
2. Set the ENC/RGB switch (on the side panel) to R.G.B.
Set the R/G/B switch (on the side panel) to G.
3. If the white shading is monitored, makes the waveform
flat following the tables.
4. Perform the adjustments for R-ch and B-ch following
the same procedures as for G-ch.
Switch H SAW H PARA
PAGE: PAGE:
White Shading (M2) White Shading (M2)
G ENC/RGB
→
RGB ITEM: H Saw (G) ITEM: H Para (G)
R/G/B
→
G
R ENC/RGB
→
RGB ITEM: H Saw (R) ITEM: H Para (R)
R/G/B
→
R
B ENC/RGB
→
RGB ITEM: H Saw (B) ITEM: H Para (B)
R/G/B
→
B
TEST OUT connector
Switch V SAW V PARA
PAGE: PAGE:
White Shading (M2) White Shading (M2)
G ENC/RGB
→
RGB ITEM: V Saw (G) ITEM: V Para (G)
R/G/B
→
G
R ENC/RGB
→
RGB ITEM: V Saw (R) ITEM: V Para (R)
R/G/B
→
R
B ENC/RGB
→
RGB ITEM: V Saw (B) ITEM: V Para (B)
R/G/B
→
B
TEST OUT connector