Sharp VL-NZ50S Service Manual page 26

VL-NZ50S/H/E/W/NZ80H
VL-NZ100S/H/E
ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM
(Wiring board diagram: Main Side A)
1. PCO D/A-Y adjustment
Test point TL1479 (connected to oscilloscope)
Mode VCR STOP mode
Procedure 1) Connect the AVS cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to "566", and call the date.
(100% white signal is output.)
4) Vary the data with the FF and REW keys to set the signal appearing at TL1479 to 1.0Vp-p ± 0.05Vp-p.
5) Write a value subtracting -6h from the adjustment data of the address 566h in the address 567h.
Examples • During E
R2913
R2906 R2918
CP2
CP1
D2905
C930
D2903
C990
Q2906
R989
R988
Q908 C971
2
PROM(IC705) replacement. • During IC4401 replacement. • During IC1401 replacement.
FB2801
C2901 R1480
R913
C2903
D2908
R2908
R2909
SC900
R2902
R2904
D2901 R2901
R2903 Q2904
C2902
IC2901
VA1401
Q2903
FB5702
J5701
FL5701
Address
26
TL1479
PCO D/A-Y
VCR ADJ 566/567
1.0±0.05