Philco PF2908, Service Manual

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Press “FACTORY” or “MENU” key, to exit “B/W BALANCE” mode and enter “ADJUST” mode. In “ADJUST” mode, Press
“0” to “7“ key and corresponding on-screen display will be appeared.
And press following key, each function will be available.
Remote Hand Unit keys
MENU0 Geometrical and E/W adjustment
Receive PAL standard Complete pattern signal.
Adjustment steps
：
a) Adjust V SL, to the center horizontal line just appeare from half bottom shadow.
b) Adjust V SI, to get 90% of vertical picture contents would be displayed on CRT.
c) Adjust V SH, the center horizontal line correspond to CRT vertical center.
d) Adjust H PH, to get the picture horizontal center correspond to CRT horizontal center.
e) Adjust EW WIDTH, to get 90% of horizontal picture contents would be displayed on CRT.*
f) Adjust EW PARA, to adjust EW parabola width.*
g) Adjust UP CORNER and LO CORNER, to correct EW upper/lower corner parabola.*
h) Adjust H-PARA and H-BOW, to correct EW Horizontal/Bow parallelogram.*
i) Adjust EW TRAPE, to correct EW trapezium.*
* E/W is only available for OM8373-serials.
MENU1 AGC Adjustment.
Receive 60dB μ (1mV)VH colour bar pattern signal
，
adjust AGC value
（
voltage from high to low
） ，
to noise reduce gradually
and just disappeared point.
Black / White BANLANCE adjustment
CRTcut off and white balance adjustment.
Switch to TV signal.
a) CRT cut off adjustment.
1. Press “MUTE” key, then automatically vertical scan will be stopped.
2. Adjust SCREEN control on Flyback transformer to get the darkest single horizontal line (red, green, or blue,
sometimes shows more yellow, more purple or more white).
Receive white signal.
b) White balance adjustment.
1. Adjust DRI R/DRI G to get colour temperature as x=281, y=311
c) Sub-Brightness adjustment. (Use stair case signal)
1. Select menu7 in “ADJUST” mode.
2. Adjust SUB BRI to get the darkest step being cutoff.
Horizontal line
Shadow
a
V+/V-: volume adjustment
TV/AV: tv/av switching
0~7,MUTE: menu 0~7
P.P: PP mode setting
FACTORY,MENU: exit service mode