Sync Agc Check (Ma-316 Board); White Clip/Dark Clip Check (Ma-316 Board); Recording Y Level Check (Ma-316 Board); Recording Chroma Level Check (Ma-316 Board) - Sony SLV-E850B Service Manual

QQ
3 7 63 1515 0
2-4-2.

SYNC AGC Check (MA-316 Board)

Mode E-E
Signal Color bar
IC201 pin #•
Measurement point
Measuring instrument Oscilloscope
Specified value A=2.1 ± 0.1Vp-p
[Check Method]
1) Check that the Video signal level (A) satisfies the specified
value.
H
Fig. 6-2-6
2-4-3.

White Clip/Dark Clip Check (MA-316 Board)

Mode E-E
Signal Color bar
IC201 pin #¶
Measurement point
Measuring instrument Oscilloscope
TE
Specified value L 13942296513 White clip : 190 ± 15%
Dark clip : 58.5 ± 5%
Connect a resistor of 3.3kΩ between IC201 pin $™ and GND.
[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 58.5 ± 5% to the white (100%)
level.
White (100%)
100%
H
Fig. 6-2-7
www
.
http://www.xiaoyu163.com
A
A
B
x ao u163
y
i
http://www.xiaoyu163.com
2 9
8
2-4-4.

Recording Y Level Check (MA-316 Board)

Mode
Signal
Measurement point
Measuring instrument
Specified value
[Check Method]
1) Check that the recording RF signal satisfies the specified value.
2-4-5. Recording Chroma Level Check
(MA-316 Board)
Mode
Signal
Measurement point
Measuring instrument
Specified value
[Check Method]
Q Q
3 6 7 1 3 1 5
1) Confirm the amplitude of recording chroma level becomes the
specified value.
co
.
6-4
9 4 2 8
E-E
No-signal
IC201 pin !•
Oscilloscope
A=307 ± 50mVp-p
Fig. 6-2-8
Recording
Color bar
IC201 pin !¢
Oscilloscope
A=350 ± 40mV
0 5 8 2 9 9 4
A
Fig. 6-2-9
m
9 9
A
2 8 9 9