Adjustment - Eiki EK-501W Service Manual

Adjustment

Service adjustment menu operation
CAUTION:
The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following adjustments
except requiring the readjustments in servicing otherwise it may cause loss of performance and product safety.
Before taking these adjustments, turn the projector for more than 10 minutes to stabilize the operation.
WARNING:
USE UV RADIATION EYE AND SKIN
PROTECTION DURING SERVICING.
[Adjustment Condition]
● Input signal
Computer .............. 0.7Vp-p/75Ω, 16 steps gray scale
Video ....................
1.0Vp-p/75Ω,16 steps gray scale ( Video signal)
Component . ..........
1.0Vp-p/75Ω, 100% full colorbar (Component signal)
● Image mode ...... "Normal" as default.
ADC auto-calibration [VGA1]
1. Input 100% colorbar signal to a VGA terminal.
2. Enter service mode.
3. ADC auto-calibration is enabled. Select group 260 item
1 and change its value from "0" to "1". After the ADC
auto-calibration is completed, the value for group 260
item 0 is automatically changed to "0".
ADC auto calibration [Video]
1. Input 16 steps gray scale signal to VIDEO terminal.
2. Enter service mode.
3. Select group 260, item 1, change the data from o to 1.
After calibrating, the data of group 260, item 0 will
change to o automatically.
ADC auto-calibration [Component]
1. Connect the component signal port to 100% colorbar.
2. Enter service mode.
3. ADC auto-calibration is enabled. Select group 260 item
1 and change its value from "0" to "1". After the ADC
auto-calibration is completed, the value for group 260
item 0 is automatically changed to "0".
CAUTION:
To prevent suffer of UV radiation, those
adjustments must be completed within
25 minutes.
100% white
W
100% white
30
16 grey scale
100% black
100% Colorbar
Y C G M R B BK
100% black