EIKI LC-X71 LC-X71L 用户手册
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Circuit Adjustments
CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the follow-
ing adjustments except requiring the readjustments in servicing otherwise it may cause loss of per-
formance and product safety.
formance and product safety.
Electrical Adjustments
[Adjustment Condition]
● Input signal
Video signal .......................... 1.0Vp-p/75Ω terminated, 16 steps gray
scale, white 100% and 50% pattern
(Composite video signal)
(Composite video signal)
Computer signal .................... 0.7Vp-p/75Ω terminated, 16 steps gray
scale, 1 line dot, 100% and 50% pat-
tern (XGA)
tern (XGA)
Component Video signal........ 0.7Vp-p/75Ω terminated, 16 steps gray
scale (480i, 480p, 720p and1080i-60)
format)
format)
● Picture control mode ................ “STANDARD” mode unless otherwise
noted.
Note:
* Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the service
* Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the service
data.
White 100%
Black 100%
After replacing the Power Board readjust the Output volt-
age adjustment as follows.
age adjustment as follows.
1. Connect a digital voltmeter to pin 1 (+) of
K6A
and
chassis ground (-).
2. Adjust the voltage by using
VR601
on the power
board as following.
AC Input
Reading
230V 370
±2Vdc
120V
356 ±2Vdc
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
Be sure to connect the lamp when taking this adjust-
ment.
z
Output Voltage adjustment
1. Receive the 16-step gray scale video signal with Input
3 [Video] mode.
2. Connect a digital voltmeter to pin 3 (+) of
CN6A
and
chassis ground (-).
3. Adjust the voltage to be
15.8
±0.1Vdc by using
VR681
on the power board.
Note:
The Power Board for replacing is already adjusted in the
factory, so it is not required to perform readjustment of
item1 and 2.
The Power Board for replacing is already adjusted in the
factory, so it is not required to perform readjustment of
item1 and 2.
x
+16V adjustment
16 steps gray scale pattern
WARNING : USE UV RADIATION EYE
AND SKIN PROTECTION
DURING SERVICING
DURING SERVICING
CAUTION: To prevent suffer of UV radia-
tion, those adjustments must be
completed within 25 minutes.
completed within 25 minutes.
Note:
The Power Board for replacing is already adjusted in the factory, so it is not required to perform readjustment of
item1 and 2.