Video System Check; Playback Level Check (Ma-359 Board); Sync Agc Check (Ma-359 Board); Deviation Check (Ma-359 Board) - Sony SLV-SE85 Service Manual

2-5.

VIDEO SYSTEM CHECK

2-5-1.

Playback Level Check (MA-359 board)

[Adjustment purpose]
Confirm that the playback video signal level is within the
specification.
Mode Playback
Signal Alignment tape: SP mode color bar
portion
CN200 !¡ pin (EEV PB) (Note1)
Measurement Point
JW234 (IC001 !• pin : ARCVY)
(Note2)
Measuring Instrument Oscilloscope
Specified Value A=2.00 ± 0.18V
Note 1: For SLV-SF99 model. (Except B model)
Note 2: For SLV-SE85/SF90 or B model.
[Check method]
1) Check that the video signal level (A) satisfies the specified
value.
H
Fig. 6-2-4.
2-5-2.

Sync AGC Check (MA-359 board)

[Adjustment purpose]
Confirm that the E-E video output level is within the specification.
Mode E-E
Signal Color bar
CN200 !¡ pin (EEV PB) (Note1)
Measurement Point
JW234 (IC001 !• pin : ARCVY)
(Note2)
Measuring Instrument Oscilloscope
Specified Value A=2.0 ± 0.1V
Note 1: For SLV-SF99 model. (Except B model)
Note 2: For SLV-SE85/SF90 or B model.
Switch setting:
INPUT SELECT ........................................ L2
[Check method]
1) Input a color bar signal to VIDEO LINE 2 terminal.
2) Check that the video signal level (A) satisfies the specified
value.
H
Fig. 6-2-7.
2-5-3.
[Adjustment purpose]
Confirm that the YFM signal deviation is within the specification.
Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Note 1: For SLV-SF99 model. (Except B model)
Note 2: For SLV-SE85/SF90 or B model.
Note 3: This check should be carried out upon completion of "Playback
Switch setting:
INPUT SELECT ................................... L2
[Check method]
White (100%) 1) Record the color bar signal.
2) Playback the recorded section.
3) Check that the video signal level (A) satisfies the specified
value.
A
White (100%)
A
6-4

Deviation Check (MA-359 board)

Recording and playback (SP mode)
Color bar
CN200 !¡ pin (EEV PB) (Note1)
JW234 (IC001 !• pin : ARCVY)
(Note2)
Oscilloscope
A=2.00 ± 0.18V
Level Check" and "Sync AGC Check".
H
Fig. 6-2-6.
White (100%)
A