Electrical Adjustments; Preparations; Equipment Required; Reset The Air Filter - Sony VPL-VW12HT 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
Note: Perform the following adjustment at least five
minutes after turning on the power.

2-1-2. Reset the Air Filter

1. Insert the Power Cord and let it standby.
2. Press the keys in the following ORDER:
"RESET" → "MENU" → "DOWN" → "ENTER"
3. Turn the Power ON.
4. Please confirm that the message of "Please exchange
the air filter" does not appear in the picture.

2-1-3. Setting the Factory Mode

1. Make sure that the STATUS in the menu is ON.
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?" will be displayed.
5. Select YES.

2-2. RGB VCOM Adjustment

1. Enter the P.DRV of the Device adjust with Factory mode.
2. Enter the item of 01 VCOM G, and check the 1 line ON/
OFF signal.
VPL-VW12HT
Section 2

Electrical Adjustments

3. Adjust the ← and → keys to minimize the flicker.
Similarly, and perform Red and Blue adjustment
similarly.
(02 VCOM R, 03 VCOM B)
4. Select the SAVE TO MEMORY on the Device adjust
page of the menu. Press the ENTER to save the data.

2-3. Signal Level Adjustment

Perform the following settings:
W/B:
INPUT-A:
VIDEO:
CONTRAST:
BRIGHT:

2-3-1. SUB-BRIGHT (NTSC) Adjustment

1. Input the NTSC 100% color bars signal to the VIDEO
input.
2. Connect oscilloscorp to TP5023 on the C board.
3. Set the COLOR to 0.
3. Enter the RGB-MTRX on the Device adjust of the
menu.
4. Select the item of 03 SU BRT. Adjust the ← or → key
so that the two bars at the center become flat.
2-3-2. SUB-CONT, HUE and COLOR
2-3-2-1. SUB-CONT. HUE and COLOR (VIDEO)
1. Input the NTSC 100% color bars signal to the VIDEO input.
2. Connect oscilloscope to TP5024 on the C board.
3. Set the COLOR to 0.
4. Enter the RGB-MTRX on the Device adjust of the
menu.
5. Select the item of 08 YUV CONT, and adjust the
amplitude of the following waveform for 0.63 Vp-p.
6. Set the COLOR to 50.
7. Select the item of 09 YUV COL. Adjust the ← or →
key so that the right and left bars are equal in level (A
portion).
8. Select the item of 02 SUB HUE. Adjust the ← or →
key so that the two bars in the middle are equal in level
(B portion).
LOW mode
10 steps
100% COLOR BARS
80
50 (Initial value)
Adjustment
Adjustment
2-1