PAL CHROMA ADJUSTMENTSECAM CHROMA ADJUSTMENT
No. Adjustment pointAdjustment procedure/conditionsWaveform and othersNo. Adjustment pointAdjustment procedure/conditionsWaveform and others
1SUB COLOUR1) Receive the OPAL Color Bar� signal.1SECAM1) Receive OSECAM COLOR BAR� signal.
2
(IC BUS2) Press R/C to set Picture Normal condition. Cy GBBLACK LEVEL2) In the service mode, select service data V14.
CONTROL)3) Connect the oscilloscope to R-Amp TransistorR-Y/B-Y3) Connect oscilloscope to TP 801.
2
(to be doneBase(TP 851). (IC BUSE Range:200mV/Div . (AC)(Use Probe 10:1)
aftersub-Range :2 V/Div (AC)CONTROL)E Sweep time : 20 msec/Div.
Offset
picture, sub-(Using 10:1 Probe)4) Adjust V14 the so that the offset of R-Y is mini-
Fig 2-1(a)
tint adj)Sweep Time : 10 m sec/Divmum, shown in Fig 2-1(b), it means adjust the
4) Using the R/C call V05 in SERVICE mode. Ad-offset of between No signal line and Signal line to
just V05 bus data, so that the 75% White & Red75% W Y 100% W Mg R minimum.
portions of PAL Color Bar be at the same level5) In the service mode, select service data V15.
shown as Fig 1-1.Fig. 1-16) Connect oscilloscope to TP 801.
5) Clear the SERVICE mode.E Range:200mV/Div . (AC)(Use Probe 10:1)
E Sweep time : 20 msec/Div.
7) Adjust V15the so that the offset of B-Y to mini-Fig 2-1(b)
mum, shown in Fig 2-2(b), it means adjust the
offset of between No signal line and Signal line to
minimum.
Offset
NTSC CHROMA ADJUSTMENTFig 2-2(a)
No. Adjustment pointAdjustment procedure/conditionsWaveform and others
2
1SUB-TINT (IC1) Receive the "NTSC3.58 Color Bar" signal thru AV
BUS CON-in.
11TROL)2) Connect the oscilloscope to B-Amp Transistor
Base (TP853 ).
E Range:100mV/Div . (AC)(Use Probe 10:1)
Fig 2-2(b)
E Sweep time : 10 msec/Div.
3) In Service mode, go to V07, press R/C Y-
mute(Hex E4).
4) Call the "V07" mode in service mode. Adjust theW Y Cy G Mg R B
"V07" bus data to obtain the waveform shown as
Fig. 1-1.Fig. 1-1
5) Disable Y-Mute by pressing key(Hex E4), then
Clear the SERVICE mode.
21D-FG3RU
11-111-2 |
ACEC
