
4. ADJUSTMENT
4-1 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.
4-2 MAIN ADJUSTMENTS
4-3 ADJUSTMENT METHOD
1. 14V, B + & HV 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 TP903 and ground, then adjust VR903 to be 14VDC.
C. Connect a DC Volt meter between TP902 and ground, then adjust VR902 to be 61 VDC.
D. Connect a DC Volt meter between TP701 (G1) and ground, Brightness set to max. Then adjust VR702 to be -55
VDC.
2. Factory preset Timings Adjustment:
A. Press MENU 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, 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 control. Then press the
Up/Down Key to adjust its value for the optimum picture.
NO.
FUNCTION
LOCATION
DESIGNATION
1.
14V ADJ
PCB - MAIN
VR903
2.
B + ADJ
PCB - MAIN
VR902
3.
SCREEN ADJ
FLY BACK TRANS
T402
4.
FOCUS ADJ
FLY BACK TRANS
T402
5.
ABL ADJ
PCB - MAIN
VR701
6.
SUB-BRIGHTNESS ADJ
PCB - MAIN
VR702
-MENU
PCB - MAIN
SW101
-UP
PCB - MAIN
SW102
7.
FUNCTION ADJ -DOWN
PCB - MAIN
SW103
-EXIT
PCB - MAIN
SW104
Page 10 of 71
5Elr SERVICE MANUAL
9/4/2002
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Страница 9: ...080 Factory Preset 9300 6500 CONTRAST H MOIRE REDUCE Pag E MANUAL ...
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Страница 67: ...11 2 CRT BOARD LAYOUT Page 70 of 71 5Elr SERVICE MANUAL ...