Sony SLV-286EE - Recording Chroma Adjustment +-+ *+-+0; Playback Level Adjustment; Carrier Deviation Adjustment

2-3-4. Recording Chroma Adjustment (RV-33 Board)
Purpose:
Adjust recording chroma level.
When it is out of order, S/N ratio of color goes bad, the picture is
not colored and second sequence beat appears.
( ): SLV-282EE/X311PS/SG
Signal Color bar
Measurement Point Q013 Emitter
Measuring Instrument | Oscilloscope
Adjusting Element RV009
120 + 10 mVp-p (180 + 10 mVp-p)
Specified Value
120 + 10 mVp-p
(180 + 10 mVp-p)
Fig. 7-2-8
Reference:
Adjusting level is low; Bad color S/N ratio, not colored.
Adjusting level is high; Second sequence beat (squared noise)
appears.
2-3-5. Playback Level Adjustment (RV-33 Board)
Purpose:
Adjust playback video signal level to the specification.
When it is out of order, the picture is darkened or brightened on
TY screen. White goes flat.
Mode Playback
Signal Color bar or alignment tape
Measurement Point VIDEO LINE OUT
Oscilloscope
1.0 + 0.02 Vp-p
Measuring Instrument
Adjusting Element
Specified Value
Note : Video Output terminal must be terminated at 75Q.
1.00 + 0.02 Vp-p
Burst level
Fig. 7-2-9
Reference:
Adjusting level is low; The picture is darkened on TV screen.
Adjusting level is high; The picture is brightened on TV screen.
White goes flat.
2-3-6. Carrier Deviation Adjustment (RV-33 Board)
Purpose:
Adjust FM modulating frequency for signal.
When it is out of order, black and white are over-modulated,
interchangeability is lack, the screen is darkened or brightened or
off.
This adjustment should be done after checking 2-3-5. Playback
Level Adjustment is satisfied.
Note : Video Output terminal must be terminated at 75 Q.
Adjusting Method:
1) Set to E-E mode in the no signal condition.
2) Connect frequency counter to emitter of Q034, and adjust
with RV006 so that the reading on frequwncy counter goes
3.80 + 0.05 MHz.
3) Feed the color bar signal and record it.
4) Playback the recorded signal and sheck the signal at VIDEO
LINE OUT goes 1.00 + 0.02 Vp-p with oscilloscope.
5) When it is out of order, adjustment it with RVO00S.
6) Repeat items 4) and 5) fill the specification is satisfied.
Whit (100%)
1.00 + 0.02 Vp-p
Fig. 7-2-10
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