White balance adjustment Mode - Be used for White balance adjustment. In Factory Mode, press" BUS OFF" to enter and exit.
Default Value OK mode - Be used for default value setting before TV leaves Factory. In Factory Mode, press "S. EFFECT" to enter default value. "Wait" will be displayed in screen, when it is finished, "OK" will be displayed. It will exit factory mode automatically.
Note: Now press "SERVICE" cannot enter factory mode, you have to take the following steps to enter:
1. Setting Volume to Zero.
2. Press "V-" in cabinet and Press "Display" in RC simultaneously
Adjustment Way1. B+ Adjustment:
Apply Philips Test pattern signal in normal status, adjusting VR821 to make B+= 130V± 0.5V.2. RF AGC adjustment:
Observe monitor the collector waveform of Q101 with the probe of Oscilloscope. Select channel 2 (>70dB) from the antenna input. Enter D-mode, select menu6 to adjust RFAGC item until the monitor peak value to 0.8Vp-p.
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