III. ALIGNMENT PROCEDURE FOR BOX:
1.
VCO Adjustment:
1) Apply the Color-Bar signal (80dB) to TV jack.
2) Repeatedly press “M” key to AUTO SEARCH menu. Press
▼
/
▲
to select MANUAL
item to search the signal. After catching the program, select FINE item and adjust until the
frequency displayed in OSD is identical with the input signal.
3) Enter D-mode, then press “3” key to enter Page3.
Select LOCK item, and press “
▶
” key to make VCO become 63, then adjust T201 on
the Analog Board to make the image normal and LOCK become 1.
Then select VCO item, and adjust VCO very finely: First press “
◀
” key to make LOCK
become 0, then press “
▶
” key to make LOCK become OK exactly.
4) To check the searched frequency: Search the input signal in MANUAL mode and
compare the frequency displayed in OSD with the input frequency. If the error is within
0.05MHz, then the adjustment is OK.
2.
AGC Adjustment:
1) Under TV mode, input Philips Test signal (Freq: 471.25MHz, Amp:60dB).
2) Enter D-mode and Page3. Then select AGC item, and adjust the value until the noise
on the background of the image just disappears. And make sure there is no Adjacent-
Channel Interference in the image.
3) After adjustment is OK, press RECALL button to quit the factory mode.
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