-28-
Electrical Adjustments
After replacing the Power Board readjust the Output
voltage adjustment as follows.
1. Connect a digital voltmeter to pins 1 (+) and 2 (-)
of
K6A
.
2. Adjust the voltage by using VR601 as following.
AC Input
Reading
20V
70V ±2V
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.
Output Voltage adjustment
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
computer 2 [rGB]
mode.
. Select group no. “
106
”, item no. “
0
” to ad-
just the voltage of
tP_VMIdG
to be
7.00
±0.01V
.
4. Select group no. “
106
”, item no. “
1
” to adjust
the voltage of
tP35r
to make the amplitude
“
d[Vpp]
” to be
10.00 ±0.05V
.
5. Select group no. “
106
”, item no. “
2
” to adjust
the voltage of
tP35G
to make the amplitude
“
d[Vpp]
” to be
10.00 ±0.05V
.
6. Select group no. “
106
”, item no. “
3
” to adjust
the voltage of
tP35B
to make the amplitude
“
d[Vpp]
” to be
10.00 ±0.05V
.
2 .reference Voltage Adjustment
㪛㩷㪲㪭㫇㫇㪴
1. Enter the service mode.
2. Connect a digital voltmeter to test point “
tPFANA
”
(+) and chassis ground (-). Select group no. “
250
”,
item no. “
0
” and change data value to adjust voltage
to be
4.5 ±0.1V
.
. Connect a digital voltmeter to test point “
tPFANB
”
(+) and chassis ground (-). Select group no. “
250
”,item
no. “
2
” and change data value to adjust voltage to be
4.5 ±0.1V
.
4. Connect a digital voltmeter to test point “
tPFANc
”
(+) and chassis ground (-). Select group no. “
250
”,item
no. “
4
” and change data value to adjust voltage to be
4.5 ±0.1V
.
5. Connect a digital voltmeter to test point “
tPFANA
”
(+) and chassis ground (-). Select group no. “
250
”,item
no. “
1
” and change data value to adjust voltage to be
13.5 ±0.1V
.
6. Connect a digital voltmeter to test point “
tPFANB
”
(+) and chassis ground (-). Select group no. “
250
”,item
no. “
3
” and change data value to adjust voltage to be
13.5 ±0.1V
.
7. Connect a digital voltmeter to test point “
tPFANc
”
(+) and chassis ground (-). Select group no. “
250
”,item
no. “
5
” and change data value to adjust voltage to be
13.5 ±0.1V
.
1. Fan Control adjustment
* Before 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.
2. 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: 20 For R-Type of LCD panel
. Panel Type Setting
Select group no. “
290
”, item no. “
1
” and change data
value from 10 to 0 or 20 depending on your LCD Panel
type. When the data value reaches 0 or 20, it returns to
10 quickly. The gamma-characteristics changes accord-
ing to your selection.
3. Panel Type Check and Setting
Summary of Contents for LC-WB42N
Page 67: ... 67 IC Block Diagrams FA7701 DDC Control IC7841 FA7703 Fan Power Control IC7811 Component2 ...
Page 68: ... 68 IC Block Diagrams MP2106 DC DC Converter IC5721 IC8018 IC8019 FA5502 P F Control IC601 ...
Page 70: ... 70 IC Block Diagrams L3E07111 LCD Driver Gamma Correction IC401 LM4889 Audio Output IC5031 ...
Page 72: ... 72 IC Block Diagrams STR Z2156 Power OSC IC651 TE7783 Parallel I O Expander IC1802 ...
Page 73: ... 73 IC Block Diagrams MP2307 DC DC Conventer IC5860 IC5842 ...
Page 113: ...KY7 WB42N00 113 Mechanical Parts List ...
Page 114: ... KY7BC July 2009 Japan 2009 Eiki Internatinal Inc A key to better communications ...
Page 132: ...A16 PCB_KY7AC NO DATA ...