Samsung CXJ2512X/XAA Service Manual page 21

4-1-4 IC902 Replacement
1. When IC902 is replaced, all values are reset to
ÒInitialized MICOM Data,Ó so readjustment is
necessary.
2. Press the POWER button 10 seconds after
plug-in.
3. To enter the factory mode, refer to 4-1-2
(Factory Mode Adjustment).
4-1-5 PIF VCO Adjustment
1. Without connecting an antenna to the tuner,
feed a 45.75MHz signal to C104. Use a
pattern generator (Marked :
2. Adjust the VCO in the service mode; set IC200
Pin 44 (AFT) to 2.5V.
4-1-6 Sub-Contrast Adjustment
1. Set sub-contrast to step 40 .
4-1-7 Sub-Tint Adjustment
1. Set sub-tint to step 27.
4-1-8 Sub-Color Adjustment
1. Set sub-Color to step 5.
Samsung Electronics
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IF
4-1-9 White Balance Adjustment
4-1-9 (A) LOW-LIGHT ADJUSTMENTS
1. Input either a lion head or Òpure whiteÓ color
pattern.
2. Warm up the receiver for 30 minutes.
3. Check data in the Factory mode:
RC, GC, BC should be Ò0Ó.
Steps BG and GG should be 128.
4. Enter Horizontal Line mode by pressing the
MUTE key.
5. Adjust the screen VR on T444 (FBT) until a
dim colored line (red,green or blue) appears
on the screen.
6. Adjust RC, BC, GC so that the dim colored
line becomes white.
7. Exit the horizontal line via the MUTE key.
4-1-9 (B) HIGH-LIGHT ADJUSTMENTS
1. After adjusting the low-light,
input a high-light pattern.
2. Adjust GG, BG in the Factory Mode.
3. Recheck in low-light.
Alignment and Adjustments (TV)
4-3