Adjustment; Adjustment Conditions And Precautions; Main Adjustments; Adjustment Method - Compaq MV7540 Service Manual

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

No.
1
2
3
4
5 FUNCTION ADJ

4-3 Adjustment Method

1. B + & HV voltage adjustment:
A. Chroma-2000 Signal generator or PC equivalent set mode 1, VGA 640X480 pattern 1.0 .
B. Connect a DC Volt meter between D925 cathode and ground, then adjust VR902 to be 66.0 VDC for
CPT CRT or LPD CRT.
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 "MORIE" function, then press the SELECT Key. While do not release the
SELECT 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.
Function
B + ADJ
SCREEN ADJ
FOCUS ADJ
ABL ADJ
- SELECT
- DOWN (-)
- UP (+)
- MENU
(The OSD menu for factory preset FOR WT CPU)
Location
PCB - MAIN
FLY BACK TRANS
FLY BACK TRANS
FACTORY OSD
PCB - MAIN
PCB - MAIN
PCB - MAIN
PCB - MAIN
9
HP MV7540
Designation
VR902
T402
T402
ABL FUNCTION
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