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VIEWSONIC CORPORATION
Confidential - Do Not Copy
P76f+-2G
13
5. Adjusting Procedure
5-1 Adjustment Conditions And Precautions
1.
Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset
at the factory.
5-2 Main Adjustments
No. Function
Location
Designation
1.
B + ADJ
PCB - MAIN
VR902
2.
SCREEN ADJ
FLY BACK TRANS
T402 SCREEN VR
3.
FOCUS ADJ
FLY BACK TRANS
T402 FOCUS VR1&VR2
4.
ABL ADJ
PCB - MAIN
AB in factory OSD
-MENU
PCB - MAIN
(SW101)
-UP
▲
PCB - MAIN
(SW102)
-DOWN
▼
PCB - MAIN
(SW103)
5.
FUNCTION ADJ
-SELECT
PCB - MAIN
(SW104)
5-3 Adjustment Method
1. B + voltage adjustment:
A. Chroma-2000 Signal generator or PC equivalent set mode 1, VGA 640
X
480 pattern 1.0.
B. Connect a DC Volt meter between TP902 and ground, and then adjusts VR902 to make the B+ is 114 VDC.
2. Factory preset Timings Adjustment:
A. Press
Key to show OSD window press UP or Down Key to switch the functional controls.
B. Press the Up Key to select the "ZOOM" function, and then press the MENU Key. While do not release the MENU
Key until the OSD window changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the controls. Then press the
Up/Down Key to adjust its value for the optimum picture.
Summary of Contents for VS11262
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