White Balance Adjustment (Pdm-4200/5000) - Sony KE-MR42M1 Service Manual

2-3. White Balance Adjustment (PDM-4200/5000)

• Measurement equipment
1.Color analyzer (CA-100 manufactured by MINOLTA)
1.Signal generator (ASTRO DESIGN VG-828D)
• Measuring procedure
1. Dab the W/B adjustment jig (CA-100) at the glass face of the panel.
2. Connect the Signal generator (VG-828D) to the DVI terminal.
3. Input All-white signal and set the picture mode to DYNAMIC.
4. Select"PNLCTRL" in the service mode menu and set "0 WBNO" at "0"
5. Select "SCNR" "SCNB" of "PDPWB" in the service mode menu, and then adjust following
W/B standardized values of 6500K, 8000K, 9300K, 10000K and 13550K to following values
of X/Y.
W/B standardized values:
6500K+8MPCD 8000K+8MPCD 9300K+8MPCD
W/B 0
X 0.3133±0.003 0.2944±0.003
Y 0.3297±0.003 0.3100±0.003
6. After adjusting the values, at the values of the "SCNR" or "SCNB" exceeding 128 (initialize
value).
1)Reset a lager value of the "SCNR" or "SCNB" at 128.
2)Set the White Balances with the last of items and "SCNG" to the X/Y values above.
7. After the above step, when these item are nonqualified following conditions, set the largest
one at 128 and readjust the White Balance with the last two item.
1)No one of "SCNR", "SCNB" and "SCNG" exceeding 128
2)Confirm the item value 128 at least one item
8. As a result above, input the sequential number of value to the "SCNR", "SCNB" and
"SCNG".
9. Repeat the same step 5 thru 8 for the W/B 1 thru 4 after setting the "0 WBNO" at each W/B
number.
10.Input following signals from the Signal generator (VG-828D).
1)All-white signal (255/255) input
2)1/25Window (255/255) input
10000K
1 2 3
0.2838±0.003 0.2806±0.003 0.2684±0.003
0.2981±0.003 0.2883±0.003 0.2700±0.003
Y (luminance)=45cd/m 2 or more
Y (luminance)=45cd/m 2 or more
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• Service mode lists
Caution: 1. Setting functions of Display section are displayed with yellow OSD.
2. Be careful not to set DATA in the yellow-covered OSD menu. The setting will be
memorized.
3. items are not required adjustment or are banned adjustment
Category Item
No. Name
PDPWB 00 SCNR Sub contrast RED gain
01 SCNG Sub contrast GREEN gain
02 SCNB Sub contrast BLUE gain
03 SBRR Sub brightness RED
04 SBRG Sub brightness GREEN
05 SBRB Sub brightness BLUE
Category
Item
13550K
No. Name
4
PDPSHAP 00 CRMD
01 HTAP
02
03 AGCM
04 EDDL
05 EDGA
06 EDNM
07 EDDE
08 DHVS
Function Data range
0-255
0-255
0-255
0-255
0-255 50"=127/42"=128(Fix)
0-255
Function Data range Initialize value
VTAP
Initialize value Device Name
(Slave Address)
128 CXD9738R
128
128
128(Fix)
128(Fix)
Device Name
(Slave Address)
KE-MR42/50M1(CH) 2-8