Toshiba 28YT56, Service Manual

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ROT-M
S-No OSD Description MinMax Def.
032 ROT-M Enable Rotation item in the menu. 0..1 1
HBL
When the reproduction of 4 : 3 pictures on a 16 : 9 picture tube is realised by means of a reduction of
the horizontal scan amplitude the edges of the picture may slightly be disturbed. This effect can be
prevented by adding an additional blanking to the RGB signals. The blanking pulse is derived form the
horizontal oscillator and is directly related to the incoming video signal (independent of the flyback
pulse). This blanking is activated with the HBL bit.
S-No OSD Description MinMax Def.
033 HBL RGB Blanking Mode On/Off On
WBF
A wide blanking pulse can be activated in the RGB outputs by means of the HBL bit in
subaddress 43H. The start of this blanking can be adjusted by means of the WBF
S-No OSD Description MinMax Def.
034 WBF start of wide blanking 0..15 10
WBR
A wide blanking pulse can be activated in the RGB outputs by means of the HBL bit in
subaddress 43H. The end of this blanking can be adjusted by means of the WBF
S-No OSD Description MinMax Def.
035 WBR end of wide blanking 0..15 8
OIF
This control is intended to correct for DC offset in the IF-PLL to improve the S/N ratio of the intercarrier sound
signal.
S-No OSD Description MinMax Def.
038 OIF Correct DC offset in the IF-PLL 0..63 32