Circuit Adjustments - Sanyo PLC-XL40 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 perfor-
mance and product safety.
[Adjustment Condition]
● Input signal
Video signal ......................... 1.0Vp-p/75W terminated, 16 steps gray
Computer signal .................... 0.7Vp-p/75W terminated, 16 steps gray
Component Video signal ....... 0.7Vp-p/75W terminated, 16 steps gray
● Picture control mode............... "STANDARD" mode unless otherwise
Note:
* Please refer to "Service Adjustment Menu Operation" for entering the service mode and adjusting the service
data.
Output Voltage adjustment
After replacing the Power Board readjust the Output
voltage adjustment as follows.
1. Connect a digital voltmeter to pins 1 (+) and 3 (-) of
K6d
.
. Adjust the voltage by using
AC Input
30V
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
* This adjustment is not required even if the power
board is replaced because this adjustment is carried
out before parts shipment.
WARNING : USE UV RAdIAtIoN EYE ANd SKIN WARNING : USE UV RAdIAtIoN EYE ANd SKIN
scale (Composite video signal)
scale pattern
scale (Component video signal with
480p, 575p, 70p or 1080i format)
noted.
VR611
as following.
Reading
380V ±V
PRotECtIoN dURING SERVICEING PRotECtIoN dURING SERVICEING
White 100%
z
Panel Type Check and Setting
1. Enter the service mode.
. Panel Type Check
290
Select group no. "
value as follows;
Data value: 0
Data value: 0
3. Panel Type Setting
290
Select group no. "
value from 10 to 0 or 0 depending on your LCD
Panel type. When the data value reaches 0 or 0,
it returns to 10 quickly. The gamma-characteristics
changes according to your selection.
* Refer to the item "LCD Panel/Prism Ass'y removal"
for the panel type check.
x
Fan Control adjustment
1. Enter the service mode.
. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
94
no. " " and change data value to adjust voltage to
5.2
be ±0.1V.
3. Connect a digital voltmeter to test point "
(+) and chassis ground (-). Select item no. "
change data value to adjust voltage to be
-5-
16 steps gray scale pattern
Black 100%
0
", item no. " ". Check the data
For L-Type of LCD Panel
For R-Type of LCD panel
1
", item no. " " and change data
tPFANA
111
tPFANB
96
5.2
" (+)
", item
"
" and
±0.1V.