10-5-14, Rec Atf Level Checking (Ss-136 Board); Character Generator Adjustments; Character Generator Sg Frequency Adjustment - Sony Video8 CCD-F501 Service Manual

10-5-14. _ REC ATF Level Checking (SS-136 Board)
Mode Recording
Signal No signal
Measurement Point Pin @ of CNSO1
Measuring Instrument | Oscilloscope
Specified Value 710 + 90 mVp-p
Checking method:
1) Confirm that the REC ATF signal level is 710 + 90 mVp-p.
710£90mvp-p
lL ropsecel
Fig, 10-22.
302
10-6. CHARACTER GENERATOR ADJUSTMENTS
Connect 20-pin extension cord between CN705 on the CT-39
board and CN703 on the VA-68 board.
10-6-1. Character Generator SG Frequency Adjustment
(CT-39 Board)
Mode E-E
Signal Non-signal
Measurement Point Pin ® of IC902
Measuring Instrument | Frequency counter
Adjustment Element | CT902
Specified Value 15734 + 100 Hz
Adjusting method:
1) Adjust to 15734 + 100 Hz with CT902.
+
Approx. 4.8 Vp-p
oat
15734 + 100 Hz
Fig. 10-23.