KV-HF21M80
4-3. PICTURE QUALITY ADJUSTMENTS
SUB COLOR ADJUSTMENT
1.Input a PAL
2.Set to the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
3.Connect an oscilloscope to pin 1 (B OUT) of CN305, A board.
4.Set to Service Mode and select SAJ 3 ‘SCL’ with 1and 4of the commander then adjust to VB2=VB3=VB4 with 3 and
6.
5.Press [MUTING] → - of the commander to write the data.
6.Adjust SAJ 3 ‘SCL’ as step 2 to 5 when receiving NTSC color- bar.
VB1 VB2 VB3 VB4
VB2 = VB3 = VB4
SUB HUE ADJUSTMENT
1.Select Video 1.
2.Input a NTSC
3.Set the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
4.Connect an oscilloscope to pin 1(B OUT) of CN305, A board.
5.Select SAJ 1 ‘SHU’ with 1and 4of the commander by set- ting to Service Mode and adjust to VB1=VB2=VB3=VB4 with
3 and 6.
VB1 VB2 VB3 VB4
VB1 = VB2 = VB3 = VB4
6. Press [MUTING] → - of the commander to write the data.
BELL FILTER ADJUSTMENT
1.Input SECAM
2.Connect the
3.Adjust SERVICE MODE, ITEMS ‘SBF’ as shown below.
4-4. A BOARD ADJUSTMENT AFTER IC003
(MEMORY) REPLACEMENT
When replacing IC003 (MEMORY), be sure to change IC001 (∝ - COM) to the following new IC at the same time.
IC001(∝
1.Enter to Service Mode.
2.Press commander buttons 5 and - (Data Initialize), and 2 and - (Data Copy) to initialize the data.
3.Call each item number and check if the respective screen shows the normal picture.
In cases where items are not well adjusted, rectify the items with fine adjustment.
Write the data per each item number ([MUTING]
4.Select item numbers “OPB0” (OP1), “OPB1” (OP2) and “OPB2” (OP3) and respectively set the bit per model with command buttons 3 and 6.
5.Press commander buttons 8 and - (Test Normal) to return to the data that was set on the shipment from the factory. (This will also cancel Service Mode.)
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