Sony EVO-720P - Page 248

8-3-18. REG Y- RF Levelt Adjustment’ (HK-3 Board) ~
8-3-19. REC C RF Level (HK-3 Board):
Note: This adjustment is. unnecessary for. the player Note: This adjustment is unnecessary for the player
side. side,
Mode EE | [Mode ~ © [EE
Signal Non-signal Signal Color bar
4 TPSOi 5 TP501
Measurement Point” | (pee RF Pin @'of-CNi02)| | Messurement Point | (pee pPs pin © of CN102)
Measuring Instrument | Oscilloscope Measuring Instrument | Oscilloscope
Adjusting Element RV501 Adjusting Element RV5O01 (C, RF).
Specified Value 0.5040.02. Vp-p Specified Value 100+15 mVp-p
Adjusting. method :
1) Adjust to 0.50+0.02 Vp-p with RV501.
0.50+0.02 Vp-p
b+ 0.24 seca
Fig, 8-28.
Note: An MP-type tape should be inserted, (Pin ©
of CN101- should be at."L")
Connection ;
1) Perform the three connections below with a
jumper in order to prevent other recording signals
from interfering.
+ Emitter of Q502 (REC ¥) GND
* Collector of Q802_ (Pin @ of IC801)
—— Emitter of Q804 (REG 5V)
* Pin @ of CN101 (REC ATF) —— GND
Adjusting method :
1) Adjust to 100£15 mVp-p with RV5Q1,
Red portion
lee
100415 mVpp
by —+
Fig. 8-29. REC C RF level
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