ADJUSTMENT
MAIN PCB
1) Items to be adjusted:
Item | Measuring Instrument |
|
|
Vop voltage setting | Voltmeter |
|
|
2) Adjustment and Test Point Locations
(TOP VIEW)
Test point
3) Equipment connection/Procedure
Vop voltage setting | |
Set | Voltmeter |
| Output |
| V5 |
| Input |
| Input | Input | Adjust | Output | Output | Adjust for |
| ||||
| Connection |
| Point | Signal | Connection | Point |
| ||||||
|
|
|
|
| |||||||||
|
|
|
|
|
|
|
|
| VR1 | Voltmeter | V5 | Adjust for 4.3 ±0.1 V reading |
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
| on voltmeter. |
|
|
|
|
|
|
|
|
|
|
|
|
| Make fine adjustment accord- |
|
|
|
|
|
|
|
|
|
|
|
|
| ing to the next instruction. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Eye
Watching the LCD at a 53.5° angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly.
53.5°
LCD
— 7 —
