ADJUSTMENT
MAIN PCB
1) Items to be adjusted:
Item |
| Measuring Instrument |
|
|
|
Vop voltage setting |
| Voltmeter |
|
| |
2) Adjustment and Test Point Locations | ||
(TOP VIEW) | (BOTTOM VIEW) | |
VR1
TP1
3) Equipment connection/Procedure
Vop voltage setting | |
Set | Voltmeter |
| Output |
| TP1 |
| Input | Input | Input | Adjust | Output | Output | Adjust for | |||||
| Connection | Point | Signal | Connection | Point | |||||||
|
|
| ||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| VR1 | Voltmeter | TP1 | Adjust for 4.1 ~ 4.0 V reading |
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
| on voltmeter under the |
|
|
|
|
|
|
|
|
|
|
|
| temparature 20 ~ 25 °C. |
|
|
|
|
|
|
|
|
|
|
|
| Make fine adjustment ac- |
|
|
|
|
|
|
|
|
|
|
|
| cording to the following in- |
|
|
|
|
|
|
|
|
|
|
|
| struction. |
|
|
|
|
|
|
|
|
|
|
|
|
|
Eye
Watching the LCD at a 36.6° angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly.
36.6°
LCD
— 7 —