Video Memory Size/Shift/Blkg Adjustments - Sony VPH-G90U Service Manual

3-7-2. Video Memory SIZE/SHIFT/BLKG
Adjustments
1. Input the monoscope signal to VIDEO IN.
2. Press the INPUT SELECT VIDEO key to project the
monoscope signal on the screen.
3. Select VIDEO MEMORY 1 using the SWITCHER/
VIDEO MEMORY/INDEX changing switch and the
SWITCHER/VIDEO MEMORY/INDEX key.
4. Press the RGB SHIFT key and adjust the center of the
monoscope signal to the screen center using the ↑, ↓,
← and → keys.
5. Press the RGB SIZE key and adjust the horizontal and
vertical sizes of the monoscope signal to 4:3 using the
↑, ↓, ← and → keys.
6. Press the BLKG key to adjust the screen top blanking
to the position 40 ± 10 mm outside the effective screen
using ↑ and ↓ keys.
7. Press the MEMORY key.
8. Store the data of VIDEO MEMORY 1 to VIDEO
MEMORY 2 to 5, too.
9. Select VIDEO MEMORY 6.
10. Press the RGB SHIFT key and adjust the center of the
monoscope signal to the screen center using the ↑, ↓,
← and → keys.
11. Press the RGB SIZE key and adjust the horizontal and
vertical sizes of the monoscope signal to 4:3 using the
↑, ↓, ← and → keys.
12. Press the BLKG key to adjust the screen top blanking
to the position 40 ± 10 mm outside the effective screen
using ← and → keys.
13. Store the data of VIDEO MEMORY 6 to VIDEO
MEMORY 7_10, too.
VPH-G90E/G90U/G90M
3-8. HIGH VOLTAGE SCREEN
DISTORTION ADJUSTMENT
1. Select INPUT A and input the fH = 64 kHz RGB stripe
signal to the RGB terminals.
2. Press CONTR (+) and BRIGHT (+) to set the contrast
and bright levels to the maximum.
3. Adjust RV1 of the EA board so that the left and right
vertical lines of the stripes can be straight.
NG
3-9. PROCEDURE AFTER COMPLETING
ADJUSTMENTS
After completing all adjustment, change the dip switch
S201-1 on the YA board from "OFF (right)" to "ON (left)"
to save the adjustment data in the memory.
OK
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