promethean PRM-10, Руководство по обслуживанию

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-5-
[Adjustment Condition]
●
Input signal
Video signal ......................... 1.0Vp-p/75
W
terminated, 16 steps gray
scale (Composite video signal)
Computer signal .................... 0.7Vp-p/75
W
terminated, 16 steps gray
scale pattern
Component Video signal....... 0.7Vp-p/75
W
terminated, 16 steps gray
scale (Component video signal with
480p, 575p, 70p or 1080i format)
●
Picture control mode............... “STANDARD” mode unless otherwise
noted.
Note:
* Please refer to “Service Adjustment Menu Operation” for entering the service mode and adjusting the service
data.
White 100%
Black 100%
Circuit Adjustments
CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the fol-
lowing adjustments except requiring the readjustments in servicing otherwise it may cause loss of
performance and product safety. Before taking these adjustments, turn the projector for more than
10 minutes to stabilize the operation.
Electrical Adjustments
16 steps gray scale pattern
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
VR611
as following.
AC Input Reading
30V 380V ±V
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
Output Voltage adjustment
* 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 PRotECtIoN
dURING SERVICING
1. Enter the service mode.
. Connect a digital voltmeter to test point “
tPFANA
”
(+) and chassis ground (-). Select group no. “
111
”,
item no. “
94
” and change data value to adjust volt-
age to be
5.2
±0.1V.
3. Connect a digital voltmeter to test point “
tPFANB
”
(+) and chassis ground (-). Select item no. “
96
” and
change data value to adjust voltage to be
6.3
±0.1V.
x
Fan Control adjustment
1. Enter the service mode.
. Panel Type Check
Select group no. “
290
”, item no. “
0
”. Check the data
value as follows;
Data value: 0 For L-Type of LCD Panel
Data value: 0 For R-Type of LCD panel
3. Panel Type Setting
Select group no. “
290
”, item no. “
1
” and change data
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.
Note:
Be careful to take this adjustment. The value of gamma
adjustment data will be reset and cannot be restored if
you change the mode of LCD panel type.
z
Panel Type Check and Setting