Sony RMT-V259M, Руководство по обслуживанию

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6-4
2-5. VIDEO SYSTEM CHECK
2-5-1. Playback Level Check (MA-388 board)
[Adjustment purpose]
Confirm that the playback video signal level is within the
specification.
Mode Playback
Signal MOD signal (color bar)
Measurement Point CN200
qa
pin (EEV PB) (Note1)
JW234 (IC661 ts pin : OSDV)
(Note2)
Measuring Instrument Oscilloscope
Specified Value A=2.1 ± 0.1Vpp
Note 1: For SLV-SE850/SF900/SF950/SF990 model. (Except B model)
Note 2:
For B model.
[Check method]
1)
Check that the video signal level (A) satisfies the specified
value.
Fig. 6-2-4.
2-5-2. Sync AGC Check (MA-388 board)
[Adjustment purpose]
Confirm that the E-E video output level is within the specification.
Mode E-E
Signal Color bar
Measurement Point CN200 qa pin (EEV PB) (Note1)
JW234 (IC661
ts
pin : OSDV)
(Note2)
Measuring Instrument Oscilloscope
Specified Value A=2.1 ± 0.1Vp-p
Note 1:
For SLV-SE850/SF900/SF950/SF990 model. (Except B model)
Note 2:
For B model.
Switch setting:
INPUT SELECT ........................................ L3
[Check method]
1)
Input a color bar signal to VIDEO LINE 3 terminal.
2) Check that the video signal level (A) satisfies the specified
value.
Fig. 6-2-5.
2-6. AUDIO SYSTEM ADJUSTMENT
[Connecting Instruments]
Fig. 6-2-6.
2-6-1. Hi-Fi Audio System Check (MA-388 board)
2-6-1-1. Overall Audio Output Level Check
[Adjustment purpose]
Confirm that the audio output level is within the specification.
Mode Recording and playback (SP mode)
Signal SF990 :
400Hz, –7.5dBs
SE850/SF900/SF950 :
400Hz, –6.3dBs
Measurement Point SF990 :
LINE3 (L/P) OUT (J500)
SE850/SF900/SF950 :
LINE1 A(L) OUT (CN500
3
pin)
or
LINE1 A(R) OUT (CN500
1 pin)
Measuring Instrument Audio level meter
Specified Value SF990 :
–7.5 ± 2dBs
SE850/SF900/SF950 :
–6.3 ± 2dBs
Switch setting:
INPUT SELECT ................................... L1
[Check method]
1)
Input a 400Hz, –7.5dBs (SF990), 400Hz, –6.3dBs signal to
both L and R channels of LINE 3 (L/R) (SF990), LINE 1
(CN500 pin
6
and
2
) (SE850/SF900/SF950).
2) Check that the audio output signal satisfies the specified value.
Audio oscillator
Attenuator
600
Ω
Audio level meter
or distortion meter
47 k
Ω
LINE-2 IN
AUDIO
LINE-1
AUDIO OUT
GND L R
L R
VCR
4 1 3
H
A
White (100%)
H
A
White (100%)