-5-
[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.
After replacing the Power Board readjust the Output
voltage adjustment as follows.
1. Connect a digital voltmeter to pin 1 (+) of K6A and
pin 3 (-) of K6A.
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
Note:
The above adjustments are carried out at the spare
parts shipment, therefore it is not required when replac-
ing the power board.
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