Sony VPL-PX41, Service Manual

Page: 23 / 136

2-1
VPL-PX35/PX40
Section 2
Electrical Adjustments
2-1. Preparation
2-1-1. Required Equipment
.
Oscilloscope
Tektronix 2465 or equivalent (350 MHz band width or
more)
.
NTSC, PAL, SECAM component signal generator
Tektronix TG2000
+
AVG1 (option module)
+
AWVG1
(option module) or equivalent
. VG (programmable video signal generator)
VG814 or equivalent
.
Digital voltmeter
Advantest TR6845 or equivalent
. Illuminance meter
n
Allow the warm-up time of 5 minutes after the power is on
before starting the following adjustments.
2-1-2. How to Enter the Factory Mode
1. Confirm that the MENU can be displayed.
2. Close the MENU.
3. Press the keys in the following order :
[ENTER]
→
[ENTER]
→
[&]
→
[ENTER]
.
The message [Do you want to enter the Factory Mode?
Yes :
↑
No :
↓
] appears.
Select [Yes :
↑
].
[Supplementary information: How to Exit the
Factory Mode]
Perform the step 3 KEY operation.
The message [Do you want to return to the User Mode?
Yes :
↑
No :
↓
] appears.
Select [Yes :
↑
].
2-2. V COM Adjustment
1. Input the green-only, 30 IRE single-line ON/OFF
signal to the input connector.
(XGA signal)
2. Enter the G VCOM adjustment screen of the Device
Adjust.
3. Adjust the G VCOM value so that the flicker is
minimal.
4. Switch the input signal from green-only to red-only
(30 IRE) then to blue only (50 IRE) single-line ON/
OFF signal. In the same way as step 3, adjust the R
VCOM and B VCOM values respectively so that the
flicker is minimal.
5. Take note of the adjustment values.
6. Set the “Image Flip” to either V or HV.
7. Input the above R/G/B adjustment values.
8. Take note of the adjustment values.
9. Set the “Image Flip” to OFF.