Service Knowhow; After Replacing The Prism Block; After Replacing The Board - Sony VPL-CS4 Service Manual

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."

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
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. Make a note of the data before replacement. After
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.).
When the data before replacement cannot be read
1. Perform Section "2-2. V-COM Adjustment."
2. Perform Section "2-5. White Balance Adjustment on
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.
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.).
3) When Replacing the Other Board
There are no need to perform the adjustment.
2-6
Cross Table of Board Replacement
Device Name Item Name
P.DRV VCOM (R)
VCOM (G)
VCOM (B)
VAMP CONT (E)
SUB CON R (E)
SUB CON B (E)
W/B ADJUST
INPUT-A HIGH GAIN R
GAIN G
GAIN B
BIAS R
BIAS G
BIAS B
INPUT-A LOW GAIN R
GAIN G
GAIN B
BIAS R
BIAS G
BIAS B
VIDEO HIGH GAIN R
GAIN G
GAIN B
BIAS R
BIAS G
BIAS B
VIDEO LOW GAIN R
GAIN G
GAIN B
BIAS R
BIAS G
BIAS B
*
: When down the data before replacement, and then
write in the data after the board replacement.
O
: Need adjustment
Value : See description.
Board Name
BA C
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
* O
VPL-CS4/CX4