Ikegami HTM-1990R Service Manual page 27

(g) VR406 [B LVL]
VR606 [R LVL]
For TP403 (B-3) and TP603 (B-3), Adjust the level of the Bch and Rch video signals so that it is the same
ratio as the level of the brightness pulse (BP) and the video signal of TP203 (G-3) when the brightness
control is set manually to min.
BP
TP203 (G-3)·standard
* Adjust the same level of the brightness pulse of TP203 (G-3), TP403 (B-3), TP603 (R-3) with calibration
of the oscilloscope and set to the same level as the video signal with VR406 [B LVL] and VR606 [R
LVL].
(h) VR751 [BRT O/S]
For brightness preset (70%), Adjust so that the pluge waveform 0% section is cut off.
(i) VR608 [R GAIN]
Adjust the video level to 50Vp-p for TP3 (Rch) of the CRT SOCKETR BOARD when the contrast control
(16:9 screen) is maximum.
<VIDEO System (Quasi-SMPTE Matrix Circuit)>
* Function for lowering the Rch signal level to 90% and mixing the signal from Gch 10% to Rch to change
the green coordinate axis slightly toward red to approach the color of the SMPTE phosphor if item 7 of the
MENU-1 screen is switched to SMPTE mode. The Rch level after mixing becomes 90+10=100 and the
white level of the color bar does not change visually. The P22 (EB mode in standard condition passes
without mixing signals. The setting value is a numerical value in relation to the standard condition.
(a) VR851 [G MIX]
For TP602, Adjust Gch signal to 10%.
(b) VR852 [R MIX]
For TP602, Adjust Rch signal to 90%.
100%
(Note)
W Y Cy G Mg R
P22 (EBU) mode
Note: Input the 100% white signal, so that the white balance does not change on the CRT screen even if
the modes (P22, SMPTE) are switched.
<VIDEO System (RGB component input)>
* Set the component input on the MENU-1 screen to RGB mode.
* Input is the RGB 100% color bar signal.
(a) VR103 [Y LVL]
For TP103 (AUX Y), Adsjust the Y signal to 1.3 Vp-p.
1-B-16
BP
Set to same
calibration on
oscilloscope
TP403 (B-3)
100%
(Note)
B
Adjust
BP
TP603 (R-3)
90%
10%
W Y Cy G Mg R
SMPTE mode
Adjust
BP: Brightness Pulse
Set with VR852
Set with VR851
B