Eiki LC-X71 LC-X71L Circuit Adjustments, z Output Voltage adjustment, x +16V adjustment

Electrical Adjustments

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.

WARNING : USE UV RADIATION EYE AND SKIN PROTECTION DURING SERVICING

CAUTION: To prevent suffer of UV radia- tion, those adjustments must be completed within 25 minutes.

[Adjustment Condition]

● Input signal			16 steps gray scale pattern
Video signal	1.0Vp-p/75Ωterminated, 16 steps gray
	scale, white 100% and 50% pattern
	(Composite video signal)
Computer signal	0.7Vp-p/75Ωterminated, 16 steps gray
	scale, 1 line dot, 100% and 50% pat-
	tern (XGA)
Component Video signal	0.7Vp-p/75Ωterminated, 16 steps gray
	scale (480i, 480p, 720p and1080i-60)
	format)
● Picture control mode	“STANDARD” mode unless otherwise	White 100%		Black 100%

noted.

Note:

*Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the service data.

zOutput Voltage adjustment

After replacing the Power Board readjust the Output volt- 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.

x+16V 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.

Note:

The Power Board for replacing is already adjusted in the factory, so it is not required to perform readjustment of item1 and 2.

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