Sony EVO-720P - Page 246

8-3-12.. Emphasis Adjustment (HK-3 Board) 8-3-14. Chroma Emphasis fo Adjustment.
(HK-3 Board)
Mode EE
Signal Color bar | Mode EE
2 | TP1G2 e | Signal. Color bar
Measurement Point | (evipH : Pin @ of ICIO1) [ Measurement Point _ | Pin © of 10302
Measuring Instrument | Oscilloscope d | Measuring Instrument | Oscilloscope.
Adjusting Element RV104 (EMPH) Adjusting Element 7303 (C. EMPH)
Specified Value 23545%, Specified. Value ‘Minimum: ‘f0 component
Adjusting method: 7 Connection :
1) Adjust the white 100% peak to 235 +5% with RV104. 1) Perform the following two connections with
15 kQ resistor. :
* Pin @ of IC301, (ACC)
: Pin.@ of .CN102 (REG 5V)
White (100%) «Pin @.of 1C301 (ACC) —— GND. :
| Adjusting method : i
23526% 1) Minimize amplitude of the chroma signal flat |
100% section with 1303.
MS
“|
Minimize
this
amplitude
SYNC.
TIP
H
Fig. 8-23. Emphasis adjustment 7
, Fig, 8-24. Chroma emphasis fo adjustment
8-3-13, 375f VCO Adjustment (HK-3 Board)
Made
EE
8-3-15,
Carrier
Balance
Adjustment
(HK-3
Board)
Signal Color bar:
Measurement Point Pin @ of IC301 Mode EE
Measuring Instrument | Digital voltmeter Signal Color_bar
Adjusting Element RV301 . Measurement Point Pin @ of C301
Specified
Value
|
“!
3,040.1
-Vde
—
Measuring
Instrument
|
Oscilloscope
an
Adjusting Element RV302 (CAR BAL) —
Minimum 3.7 ~ 5.17 MHz
component
Adjusting method :
1) Adjust to 3,040.1 Vde with RV301. Specified Value
Adjusting method:
1) Adjust RV302 so that the 3.7 — 5.17 MHz component
is minimum.
Minimize this amplitude
baal
Fig. 8-25. Carrier balance adjustment
—324—