[Adjustment Condition]
● Input signal
Video signal .......................... 1.0Vp-p/75Ω terminated, 16 steps gray
scale (Composite video signal)
Computer signal .................... 0.7Vp-p/75Ω terminated, 16 steps gray
scale pattern (XGA)
Component Video signal ...... 0.7Vp-p/75Ω terminated, 16 steps gray
scale (Component video signal with
480p or 1080i 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
data.
-23-
After replacing the Power Board readjust the Output
voltage 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
or 120V 340 ±2Vdc
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
● 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.
Electrical Adjustments
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.
+16V adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [COMPUTER] mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “TP531” (+)
and chassis ground (-).
4. Select group no. “5”, item no. “1” and change data
value to adjust the voltage to be 7.50 ±0.1Vdc.
5. Connect a digital voltmeter to test point “TP501” (+)
and chassis ground (-).
6. Select item no. “0” and change data value to adjust
the voltage to be 7.50 ±0.1Vdc.
7. Connect a digital voltmeter to test point “TP561” (+)
and chassis ground (-).
8. Select item no. “2” and change data value to adjust
the voltage to be 7.50 ±0.1Vdc.
Video Center adjustment
16 steps gray scale pattern
To Next Page
Loading...
Need help?
General
