1. Voltage adjustment
1 - 1 +6V adjustment
1. Adjust the voltage by using VR652 on the power board
as following.
Connection Adjustment value
(+) 2pin of K6D 6.35 ± 0.05V
on the Power Board
(–) Chassis GND
1 - 2 +24V adjustment
1. Adjust the voltage by using VR in in switching regurater
A902 as following.
Connection Adjustment value
(+) TP7614 26.0 ± 0.1V
on the Unit Sub Power
(–) Chassis GND
2. AV video signal adjustment (Y)
Equipment Oscilloscope
Input mode Video mode (Composite)
Input signal 100% color bar (NTSC)
Picture mode Normal
1. Enter the service mode.
2. Connect an oscilloscope to test point.
3. Change data value.
Adjust the amplitude A to below.
Group No. Connection Adjustment value
2000 - 2 TP211 0.7 ± 0.05V
3. AV video signal adjustment (C)
Equipment Oscilloscope
Input mode Video mode (Component)
Input signal 100% color bar (NTSC)
Picture mode Normal
1. Enter the service mode.
2. Connect an oscilloscope to test point.
3. Change data value.
Adjust the amplitude A to below.
Group No. Connection Adjustment value
2000 - 3 TP221 0.7 ± 0.05V
4. LCD Panel L/R Setting
S290 LCD Panel Type L / R setting
1. Enter the service mode.
2. Check the data value. (290 - 0)
Group No. Value Panel type
290 - 0 0 L
290 - 0 20 R
3. Set the each data value.
Group No. Value Panel type
290 - 1 0 L
290 - 1 10 Initial
290 - 1 20 R
The initial data of 290 -1 is "10".
Down or up the data value to "0" or "20".
It automatically returns to initial data "10" after the set-
up.
4. Check the data value. (290 -0).
Confirm the data value was changed.
Group No. Value Panel type
290 - 0 0 L
290 - 0 20 R
Notice:
After Main Board (or IC1861) replacement, Check service
data 290 - 0 and LCD panel / Prism assembly type (R or L).
Set the each data value. (290 -1).
The adjustment data is stored Main Board (IC1861)
- 87 -
Electrical Adjustments
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