L-PD3U
3. VF contrast adiustment
Test point
Address
VCR ADJ 45
Mode
Procedure
TL8811 (VG)
I
VCR AV input
1) The input signal must be 3-step wave.
2) Connect TL8825 (IC8800 pin 53) to GND.
3) Change the address 41142 to 00.
4) Adjust the pedestal -100% interval of wave form of TL8811 to the specified level.
Adjustment 1.0 + O.lVp-p
, +lu 1.0+0.1 vp-p
rating
Remark
Examples
GND
l During E2PROM (IC703) replacement.
l During IC8800 replacement.
4. VF y 1 adjustment
Test point
Address
Mode
Procedure
TL8811 (VG)
VCR ADJ 42
VCR AV input
1) The input signal must be 3-step wave.
2) Connect TL8825 (lC8800 pin 53) to GND.
3) Adjust the pedestal -100% interval of wave form of TL8811 to the specified level.
Adjustment
rating
3.1 * O.lVp-p
.
1
3.1 fO.l vp-p Sig .center
GND
Remark
Examples
l During IC703 (E2PROM) replacement.
l Durina IC8800 reblacement.
5. VF sub bright R/B adjustment
View Far panel area
VCR ADJ 44 (R) VCR ADJ 43 (B)
VCR AV input
1 Mode
Procedure 1) Feed 40% white signal to the AV input jacks and the standard monitor.
2) Adjust the tone of the color with the VCR ADJ addresses 43 and 44 until it becomes the same as that of the
standard monitor.
Adjustment
rating
Remark
i
1 Make this adjustment after 5-minute or longer aging.
Examples
l During IC703 (E2PROM) replacement.
l During IC8800 replacement.
1042
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