Electrical Adjustments; Preparations; Equipment Required; Optical Unit Adjustment - Sony VPL-CS4 Service Manual

2-1. Preparations

2-1-1. Equipment Required

. Oscilloscope
Tektronix 2465 or equivalent
(bandwidth: 350 MHz or more)
. NTSC, PAL, SECAM component signal generator
Tektronix TG2000 + AVG1 (optional module) + AWVG1
(optional module) or equivalent
. VG (Programmable video signal generator)
VG814 or equivalent
. Digital voltmeter
Advantest TR6845 or equivalent
. Luminance meter
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Perform the following adjustments at least 5 minutes after
turning on the power.

2-1-2. Optical Unit Adjustment

Drive the cooling fan and turn on the lamp.
1) Mirror Adjustment
Set the screen size to 80-inch at the wide-end.
1. Set the unit in green-only.
2. Adjust the blanking sections at the top, bottom, left,
and right for minimum by moving the adjusting plate
of the G dichromatics mirror.
3. Tighten the adjusting plate fixing screws.
4. Set the unit in cyan.
5. Adjust the blanking sections at the top, bottom, left,
and right for minimum by moving the adjusting plate
of the RB mirror, and then maximize the intensity of
the blue.
6. Tighten the adjusting plate fixing screws.
7. Set the unit in all white.
8. Adjust the blanking sections at the top, bottom, left, and
right for minimum by moving the adjusting plate of the
RB mirror, and then maximize the intensity of the red.
9. Tighten the adjusting plate fixing screws.
10. Secure the six adjusting plate fixing screws using a
torque screwdriver.
Tightening torque: 8 kgf/cm
11. Make sure that the deviation of the lighting range is
within the specific range.
VPL-CS4/CX4
Section 2

Electrical Adjustments

2-1-3. Factory Mode Setting

1. Make sure that the MENU is indicated.
2. Exit the menu.
3. Press the keys in the following order:
"ENTER" → "ENTER" → "LEFT" → "ENTER"
4. The message "Do you wish to enter into the
FACTORY MODE? Yes:↑ No:↓ " will be displayed.
5. Select "Yes:↑".
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When leaving the FACTORY MODE, perform item 3.
"Do you wish to return to the USER MODE? Yes:↑ No:↓ "
will be displayed. Select "Yes:↑".

2-2. V-COM Adjustment

1. Input the green-only 30 IRE all white signal to
INPUT-A.
2. Set the CONTRAST to 80 and BRIGHT to 50.
3. Set the screen to G VCOM adjustment of "Device
Adjust."
Adjust the G VCOM so that the vertical line on the
screen is minimum.
4. Input the red-only and blue-only 30 IRE all white
signal respectively and adjust R VCOM and B VCOM
respectively so that the vertical line becomes
minimum.
5. Save the value adjusted.
2-1