Circuit Adjustments - Sanyo PLC-XP57L Service Manual

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
[Adjustment Condition]
● Input signal
Video signal .......................... 1.0Vp-p/75Ω terminated, 16 steps gray
Computer signal .................... 0.7Vp-p/75Ω terminated, 16 steps gray
Component Video signal........ 0.7Vp-p/75Ω terminated, 16 steps gray
● Picture control mode ................ "STANDARD" mode unless otherwise
Note:
* Please refer to "Service Adjustment Menu Operation" for entering to the service mode and adjusting the service
data.
z
Output Voltage adjustment
After replacing the Power Board readjust the Output volt-
age adjustment as follows.
1. Connect a digital voltmeter to pin 1 (+) of
chassis ground (-).
2. Adjust the voltage by using
board as following.
AC Input
230V 370 ±2Vdc
120V 356 ±2Vdc
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
Note:
The Power Board for replacing is already adjusted in the factory, so it is not required to perform readjustment of
item1 and 2.
AND SKIN PROTECTION
DURING SERVICING
scale, white 100% and 50% pattern
(Composite video signal)
scale, 1 line dot, 100% and 50% pat-
tern (XGA)
scale (480i, 480p, 720p and1080i-60)
format)
noted.
K6A
VR601
on the power
Reading
CAUTION: To prevent suffer of UV radia-
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
and chassis ground (-).
3. Adjust the voltage to be
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.
- 25 -
tion, those adjustments must be
completed within 25 minutes.
16 steps gray scale pattern
White 100%
15.8
±0.1Vdc by using
Black 100%
CN6A
and