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ADJ-5
SECTION 3 ADJUSTMENTS
<LW375/LW335/LB425/LB385/LB355/LB305>
* Before setting, check which type of Optical block is used by
the projector according to the "Optical block removal"
chapter in Optical Parts Disassembly.
1. Enter the service mode.
2. Optical block type check
Select Group 290 and No. 0 to check the following values;
Data "0"
: L-type Optical block
Data "20"
: R-type Optical block
If the installed type of Optical block is different from the
set display mode, perform the following procedures.
3. Optical block type mode setting
Select Group 290 and No. 1, set the Data value between
10 and 0 or 20 according to the Optical block type. When
the value reaches 0 or 20, it will return to 10.
3. 2. Circuit adjustment
CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following
adjustments except requiring the readjustments in servicing otherwise it may cause loss of performance
and product safety. Before adjustment, please turn on the projector for more than ten minutes.
WARNING: USE UV RADIATION EYE AND SKIN PROTECTION DURING SERVICING
.
CAUTION: To prevent suffer of UV radiation, those adjustments must
be completed within 25 minutes.
1. Fan voltage adjustment
Equipment Digital voltmeter
1. Enter the service mode.
2. Connect the digital voltmeter to the test points listed
below.
3. Select Group no. 250, No. 0 and change the Data
value to adjust the reading of voltmeter to be
specified value.
4. Adjust the remaining adjustments of the No. 1 to 5
listed below.
Group-No.
Test Points
Adjustment value
250 - 0
FAN-A1
4.0+0.1/-0.05Vdc
250 - 1
FAN-A1
12.5+0.05/-0.1Vdc
250 - 2
FAN-B1
6.0+0.1/-0.05Vdc
250 - 3
FAN-B1
13.0+0.05/-0.1Vdc
250 - 4
FAN-C1
6.0+0.1/-0.05Vdc
250 - 5
FAN-C1
12.5+0.05/-0.1Vdc
2. Panel type check and setting
3. Flicker adjustment
Input signal No signal
1. Enter the service mode.
2. Select Group No.30 and change Data value as follows.
Obtain the minimum screen flickering value by adjusting
the value.
Group-No. Adjustment
30 - 3
Red flickering
30 - 4
Green flickering
30 - 5
Blue flickering
4. Keystone offset correction
Input signal No signal
1. Put the projector on a horizontal place with the adjust-
able feet being minimum range and then enter the
service mode.
2. Select Group 102, No.3 and set data value from 0 to 10.
3. By pressing the <INPUT/ENTER> button, the Keystone
Offset adjustment will start.
4. When it has completed, the "OK" message will appear
on the screen.
5. By pressing any button on the projector or the remote
control, the "OK" message will disappear.
(Data value of Group 102, No.3 will be back to 0 for
initial value.)
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