Ikegami HTM-1990R Service Manual page 25

(c) VR104 [Y BIAS]
VR304 [PB BIAS]
VR504 [PR BIAS]
For the test points TP107 (Y-3), TP306 (PB-3), TP507 (PR-3), the pedestals of the signals and the potential
of the H.BLK are the same.
H.BLK
Adjust
Y signal
(d) VR306 [PB SPRIT O/S]
VR506 [PR SPRIT O/S]
Keep the COLOR/MONO switch on the front panel depressed, CRT screen is the Color/Mono split mode.
Adjust the pedestal brightness difference to the minimum value, using VR306 for blue and VR506 for red
when the SCREEN Switch has been used to set to the single color of blue or red.
Color display area.
Monochrome display area.
<VIDEO System (RGB signal adjustment)>
(a) VR401 [HD B BAL]
VR402 [SD B BAL]
For TP401 (B-1), Adjust the blue matrix of HDTV and SDTV when the chroma preset data is 50%.
HDTV
(100% COLOR BAR)
(b) VR603 [HD R BAL]
VR604 [SD R BAL]
For TP601 (R-1), Adjust the red matrix of HDTV and SDTV when the chroma preset data is 50%.
HDTV
1-B-14
Pedestal
Adjust 100%
Adjust 100%
(100% COLOR BAR)
H.BLK
Adjust
0V
Pb/Pr signal
SDTV
(SMPTE COLOR BAR)
SDTV
(SMPTE COLOR BAR)
Pedestal
Adjust 75%
Adjust 75%
0V
Adjust