Sub Contrast Adjustment; Adjustment Of Ntsc Mode; Ntsc Composite Input; Ntsc Y/C Input - Sony PVM-9L1 Service Manual

2-16. Sub Contrast Adjustment

1. Set ASPECT to 4:3.
2. Input window pattern signal.
Window size is less than the following area.
26 usec
3. Adjust window brightness within standard (description
below) using the [SUB CONTRAST] at SERVICE
MODE [SIGNAL]-[WHITE BALANCE].
170 ± 10 cd/m
2
4. Set ASPECT to 16:9.
5. Adjust window brightness within standard (description
below) using the [SUB CONTRAST] at SERVICE
MODE [SIGNAL]-[WHITE BALANCE].
170 ± 10 cd/m
2
2-14
11.4 usec

2-17. Adjustment of NTSC Mode

2-17-1. NTSC Composite Input

Input NTSC 75% color bar signal.
1. Adjust SUB CHROMA so that CN301-pin1 (JL301)
waveform A and D fall on same level.
A B C
2. Adjust SUB CHROMA so that CN301-pin1 (JL301)
waveform B and C fall on same level.
A B C
3. Repeat steps 1 and 2, and adjust so that A, B, C, D fall
on same level.

2-17-2. NTSC Y/C Input

Input NTSC 75% color bar signal.
1. Adjust SUB CHROMA so that CN301-pin1 (JL301)
waveform A and D fall on same level.
A B C
2. Adjust SUB PHASE so that CN301-pin1 (JL301)
waveform B and C fall on same level.
A B C
3. Repeat steps 1 and 2, and adjust so that A, B, C, D fall
on same level.
Less than 800 mV
Target; 0 mV
D
Less than 800 mV
Target; 0 mV
D
Less than 800 mV
Target; 0 mV
D
Less than 800 mV
Target; 0 mV
D
PVM-9L1