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2-6
VPL-CS4/CX4
2-4. Service Knowhow
2-4-1. After Replacing the Prism Block
1.
Perform Section “2-2. V-COM Adjustment.”
2.
Perform the Gamma data writing of the Prism Block.
3.
Perform Section “2-5. White Balance Adjustment on
Servicing.”
Servicing.”
2-4-2. After Replacing the Board
. Refer to the cross table shown on right.
. There are no need to perform the adjustment when the board
. There are no need to perform the adjustment when the board
other than the BA board or C board had been replaced.
1) When Replacing the BA Board
When the data before replacement can be read properly
1.
1.
Make a note of the data before replacement. After
replacement, write the data into the new board with
service mode.
replacement, write the data into the new board with
service mode.
2.
If the white balance is extremely deteriorated, perform
the white balance adjustment (Refer to Section 2-5.).
the white balance adjustment (Refer to Section 2-5.).
When the data before replacement cannot be read
1.
1.
Perform Section “2-2. V-COM Adjustment.”
2.
Perform Section “2-5. White Balance Adjustment on
Servicing.”
Servicing.”
2) When Replacing the C Board
1.
Before replacement, unsolder the IC208 from the
replaced C board and then mount it to the new board.
replaced C board and then mount it to the new board.
2.
Perform Section “2-2. V-COM Adjustment.”
3.
If the white balance is extremely deteriorated, perform
the white balance adjustment (Refer to Section 2-5.).
the white balance adjustment (Refer to Section 2-5.).
3) When Replacing the Other Board
There are no need to perform the adjustment.
Cross Table of Board Replacement
Board Name
Device Name
Item Name
BA
C
P.DRV
VCOM (R)
*
O
VCOM (G)
*
O
VCOM (B)
*
O
VAMP
CONT (E)
*
O
SUB CON R (E)
*
O
SUB CON B (E)
*
O
W/B ADJUST
INPUT-A HIGH
GAIN R
*
O
GAIN G
*
O
GAIN B
*
O
BIAS R
*
O
BIAS G
*
O
BIAS B
*
O
INPUT-A LOW
GAIN R
*
O
GAIN G
*
O
GAIN B
*
O
BIAS R
*
O
BIAS G
*
O
BIAS B
*
O
VIDEO HIGH
GAIN R
*
O
GAIN G
*
O
GAIN B
*
O
BIAS R
*
O
BIAS G
*
O
BIAS B
*
O
VIDEO LOW
GAIN R
*
O
GAIN G
*
O
GAIN B
*
O
BIAS R
*
O
BIAS G
*
O
BIAS B
*
O
*
: When down the data before replacement, and then
write in the data after the board replacement.
O
: Need adjustment
Value : See description.
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