Parker TS2151, Service Manual

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3. Factory menu adjustment (FACTORY MENU PAGE)
3.1 VIF adjustment
Receive a signal at will, enter factory menu VCJ ADJ, select VIF VCO, press “VOL+/_”, then display
“END” and it means IC has adjust IF to 45.75MHz automatically.
3.2 S-TRAP adjustment
Receive a signal at will, enter factory menu VCJ ADJ, select S-TRAP, press “ VOL+/_”, then IC will adjust
S-TRAP to the best situation.
3.3 H VCO adjustment
Receive a signal at will, enter factory menu RASTER ADJ, select H VCO ADJ, press “ VOL+/_”, then IC
will auto adjust H VCO to the best situation.
3.4 OSD adjustment
Receive NTSC signal, check the OSD, if OSD is not at the center of the screen, you can adjust ”110:
OSD H-POS” of the last page of SERVICE MENU.
3.5 B+ voltage adjustment
a) Make sure that the power is AC 110V/60Hz
b) Connect B+ point with a digital voltmeter, receive A-7 signal, set the picture to “standard”, the
value of B+ voltage should be 110 V
±
0.5 V
3.6 AGC adjustment
a) Receive 60 dB split field signal(A-7).
b) Use oscilloscope or digital voltmeter to monitor check TUNER 1# pin’s voltage (AGC output).
c) Enter factory menu VCJ ADJ, select RE DELAY, increase the value until the voltage just about
3.8V, now the picture should just without noisy, otherwise adjust R-AGC slightly.
3.7 Focus adjustment
a) Receive A-12 PHILIPS signal, set user control to “standard”.
b) Adjust focus electrode potentiometer on FBT to optimize B area focus of screen.
3.8 Screen-grid voltage and white balance adjustment
a) Receive A-7 signal, set user control to “vivid”.
b) Select CRT ADJ of factory menu, fixed C-OFF G(175), adjust C-OFF R, C-OFF B, DRV-R,
DRV-B, till the white balance is normal basically.
c) Adjust potentiometer of SCREEN till the bottom right two scales appear, now the SCREEN
voltage is about 530V±10V. If SCREEN voltage is normal, while the picture not, you can adjust
SUB BRIGHT and SUB CONTRAST of PICTURE ADJ.
d) fine adjust white balance (color temperature:12000K±8MPCD,X=0.270±0.008, Y=0.283±0.008)
e) At YUV state adjust C-OFF R YCbCr, C-OFF B YCbCr, DRV-R YCbCr, DRV-B YcbCr, till the
white balance is normal.
3.9 line, field center adjustment
NTSC(60Hz) line, field center adjustment
Receive A6 signal, set user control to “standard”, enter RASTER ADJ item, adjust field center V-POS,
line center H-POS, let the center of picture coincide with center of screen.
3.10 field amplitude adjustment
NTSC(60Hz) field amplitude adjustment
Receive A12 signal, set user control to “standard”, adjust field amplitude V-SIZE, let the vertical
reproduction ratio of picture acceptable 8%.
3.11 if the linearity and geometry are not satisfied, you may adjust the following items of RASTER ADJ:
Corner PARA