folken. forget legacy options and use latest groovymame and latest drivers. The best way would be uninstall drivers and install again but with some modifications in monitor.ini:
monitor "arcade_15", "Arcade 15.7 kHz - standard resolution", "4:3"
crt_range0 15625-16200, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192,
1.424, 0, 0, 192, 288, 448, 576
or adding two new lines:
monitor "arcade_15tri", "Arcade 15.7 kHz - trinitron custom", "4:3"
crt_range0 15625-16200, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.424, 0, 0, 192, 288, 448, 576
That crt_range0 must be used again in mame.ini:
monitor custom
crt_range0 15625-16200, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576
Now You need some modifications in Sony service menu, please put default values (I hope You have wrote it before messing in service menu)before You change something:
Left-HBlk 0
Right-HBlk 0
now only for testing (You should see 3 horizontal lines - red, green, blue):
V-Size 28
H-Size 37
default values bad for You:
modified values ok for You: