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-E830B Service Manual

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
Specified value 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
2-4-4.
Mode
Signal
Measurement point
Measuring instrument
Specified value
[Check Method]
1) Check that the recording RF signal satisfies the specified value.
A
2-4-5.
Mode
Signal
Measurement point
Measuring instrument
Specified value
[Check Method]
1) Confirm the amplitude of recording chroma level becomes the
specified value.
A
B
6-4

Recording Y Level Check (MA-316 Board)

E-E
No-signal
IC201 pin !•
Oscilloscope
A=307 ± 50mVp-p
Fig. 6-2-8
Recording Chroma Level Check
(MA-316 Board)
Recording
Color bar
IC201 pin !¢
Oscilloscope
A=350 ± 40mV
Fig. 6-2-9
A
A