Recording Y Level Check (Ma-289 Board); Recording Chroma Level Check (Ma-289 Board) - Sony SLV-495 Service Manual

2-4-2. SYNC AGC Check (MA-289 Board)
Video LINE OUT terminal
Oscilloscope
Specified value A=1.00 + 0.05Vp-p (75Q terminated)
[Check Method]
1) Check that the Video signal level (A) satisfies the specified
value.
White (100%)
1C201 pin @
Oscilloscope
White clip: 190 + 15%
Dark clip: 50 + 10%
[Check Method]
1) Check that the white clip level is 190 + 15% to the white (100%)
level.
2) Check that the dark chip level is 50 + 10% to the white (100%)
level.
White (100%)
2-4-4. Recording Y Level Check (MA-289 Board)
[Modo C(ECSC~'*S
[Check Method]
1) Check that the recording RF signal satisfies the specified value.
VV
Fig. 7-2-7.
2-4-5. Recording Chroma Level Check
(MA-289 Board)
Mode ————*d Recording ——SSSSSCSCS~*d
[Check Method]
1) Confirm the amplitude of recording chroma level becomes the
specified value.
ees
Ey