promethean PRM-30A Service Manual page 30

Electrical Adjustments
z Fan Voltages adjustment
Equipment Digital voltmeter
1. Enter the service mode.
. A djust the voltage on each test point by changing the
data values of the Group - No.
Group No. Test Point
250 - 0
TPFANA
250 - 1 TPFANA
250 - 2
TPFANB
250 - 3
TPFANB
250 - 4 TPFANC
250 - 5
TPFANC
x Panel Type Check and Setting
* B efore setting, you need to check which type of LCD pan-
el is placed on the projector according to the item "LCD
Panel/Prism Ass'y removal" in the chapter "Optical Parts
Disassembly".
1. Enter the service mode.
. Panel Type Check
290
Select group no. " ", item no. "
value as follows;
Data value: 0 For L-Type of LCD Panel
Data value: 0 For R-Type of LCD panel
I f the mounted LCD panel type and set Panel mode
are differ, take the step below.
3. Panel Type Mode Setting
290
Select group no. " ", item 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 ac-
cording to your selection.
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
Adjustment value
4.5 ±0.1Vdc
13.5 ±0.1Vdc
5.0 ±0.1Vdc
13.5 ±0.1Vdc
5.0 ±0.1Vdc
13.5 ±0.1Vdc
0
". Check the data
1
" and change data
c PC Auto calibration
Input mode Computer 1 (RGB) mode
Input signal 16-step gray scale computer signal
1. Enter the service mode.
. S elect Group "260", No. "0" and set data value "0" to
"1".
T he projector begins auto-calibration and then "OK"
will appear on the screen.
v Component Auto calibration
Input mode Computer 1 (Component) mode
Input signal 100% color bar signal (480i)
1. Enter the service mode.
. S elect Group "260", No. "0" and set data value "0" to
"1".
T he projector begins auto-calibration and then "OK"
will appear on the screen.
b Video Auto calibration
Input mode Video (Video) mode
Input signal 1 6-step gray scale composite video
signal
1. Enter the service mode.
. S elect Group "260", No. "0" and set data value "0" to
"1".
A fter the auto-calibration completed, "OK" will appear
on the screen.
Adjustments item no. [3] to [5] are carried out at the
spare parts shipment in the factory, therefore they are
not required when the main board is replaced with new
one.
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