Service manual

14
LC-20VM2
LC-121M2E
LC-150M2E
Adjustment Adjustment conditions Adjustment method
3 B CUTOFF adjustment 1. Input the NTSC standard color bar 1. Adjust B CUTOFF so as to equalize
(B CUTOFF Item) to AV1. the black levels of green and blue.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
4 Unicolor adjustment 1. Input the NTSC standard color bar 1. Adjust N358 UNICOLOR so as to
(N358 UNICOLOR Item) to AV1. get 2.3±0.1Vp-p between the 100%
2. Connect the oscilloscope to TP821 white and GND.
(IC316, pin7, G output).
5 R DRIVE adjustment 1. Input the NTSC standard color bar 1. Adjust so as to get 100% white level
(R DRIVE Item) to AV1. identical with that of green.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
6 B DRIVE adjustment 1. Input the NTSC standard color bar 1. Adjust so as to get 100% white level
(B DRIVE Item) to AV1. identical with that of green.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
7 Colour level adjustment 1. Input the NTSC standard color bar 1. Adjust N358 SCOLOR so as to get
(N358 SCOLOR Item) to AV1. the color bar signal blue amplitude
2. Connect the oscilloscope to TP820 (GND - peak level) equal to 1.8V ±
(IC316, pin1, B output). 0.1Vp-p.
8 Tint adjustment 1. DAC value is set in "67".
(N358 TINT Item)