Character Generator Clock; Y Level Adjustment; Dc Balance (Y) Adjustment - Sony RM-E700 Service Manual

7-2-5. Character Generator Clock Timing 7-2-7. Y Level Adjustment (VI-60 Board)
Adjustment (VI-60 Board) Signal Color bar
Measurement lp 9 (CNJ 4 VIDEO OUT)
point
Color bar
Measurement | CH 1: TP 12 (Pin@® of IC 503)
point CH 2: TP 13 (Pin ® of IC 509)
Measuring Oscilloscope
instrument
Measuring Oscilloscope
Adjusting RV 1
element
Specified 1.0+0.1Vp-p
value
instrument
Adjusting RV 11
element
Specified t=0+10nsec.
value
[Adjusting method]
ii
on TLL
*
CH2 Fig. 7-5.
"Sy Enlargement
" "fa
om VIVA
CH2
ee meee "
7-2-8.
DC Balance (Y) Adjustment
ee
-t d
(VI-60 Board)
Measurement | TP 6 (Pin @ of IC 212)
point
Measuring Oscilloscope
instrument
Adjusting RV 2
element
+ -
Specified AV =0+20mV
Measuring _ | Oscilloscope
instrument value
Adjusting TRV 10 [Adjusting method]
element 1) Press the PAGE 1 button.
Specified Less than —200mVdc 2) Press the IMAGE button so that the IMAGE indication is
value displayed is the display window.
3) Press the MEMORY button.
4) Set that the digital color is black with COLOR button.
5) Adjust to 0+20mV with RV2.
6) Press the CLEAR button.
[Adjusting method]
1) Adjust to less than —200mVdc with RV 10.
: Digital black level
; Pedestal level
AV=0+20mvV
Fig. 7-6.
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