Adjusting The Picture - Philips B8 Series Service Manual

Focus
1. Tune to a local station and adjust the Focus Control (located on the Flyback
Transformer) for best picture details at high light conditions.
Screen Control (G2) Setup (13", 19", & 20")
1. Apply an NTSC Color Bar test pattern, with the color "off", to the antenna input of
the TV Receiver.
2. Select the active channel.
3. Set all the customer picture controls to mid-range.
4. Using an oscilloscope measure and note the peak to peak voltage of the CRT
Cathodes. Use the legs of R11, R12, and R13 which tie to the CRT socket.
5. Using the cathode with the highest peak to peak voltage, noted in step 4, adjust the
Screen Voltage (G2) control (located on the Flyback Transformer) to obtain 120Vp-p.
Screen Control (G2) Setup (25" & 27")
1. Apply an NTSC Color Bar test pattern, with the color "off", to the antenna input of
the TV Receiver.
2. Select the active channel.
3. Set all the customer picture controls to mid-range.
4. Using an oscilloscope measure and note the peak to peak voltage of the CRT
Cathodes. Use the legs of R60, R61, and R62 which tie to the CRT socket.
5. Using the cathode with the highest peak to peak voltage, noted in step 4, adjust the
Screen Voltage (G2) control (located on the Flyback Transformer) to obtain 120Vp-p.

Adjusting The Picture

Note: The Color Purity and Convergence Adjustments described below should be performed
only after installation of a new CRT or Deflection Yoke Assembly otherwise, it will not
be necessary to remove the rubber wedges. Minor corrections for purity and convergence