Sync. Agc Check; X'tal Oscillation Frequency Check - Sony SLV-E580EE Service Manual

2-4-2. Recording Chroma Level Check
(MA-315 Board)
Purpose:
Check the chroma signal level after passing through the Y/C sepa-
rating circuit.
If shifted, the image is roughened and another color may appear
on the edges.
Mode
Signal
Measurement point
Measurement equipment
Specified value
Confirmation Method:
1) Confirm that the record chroma level is 500 ± 80 mVp-p.
Fig. 7-2-5.

2-4-3. Sync. AGC Check

(MA-315 Board)
Purpose:
Confirm that the video level is correct.
Mode
Signal
Measurement point
Measurement equipment
Specified value
Note: Video output terminal must be terminated at 75 .
Confirmation Method:
1) Confirm that the sync. AGC level is 2.10 ± 0.14 Vp-p.
White (100%)
H
Fig. 7-2-6.
E-E
Color bar
Pin !¢ of IC201
Oscilloscope
500 ± 80 mVp-p
500 80 mVp-p
E-E
Color bar
Pin #• IC201
Oscilloscope
2.10 ± 0.14 Vp-p
2.10 0.14 Vp-p
2-4-4.

X'tal Oscillation Frequency Check

(MA-315)
Purpose:
Confirm that the fsc is correct.
Mode
Signal
Measurement point
Measurement equipment
Specified value
Note: Connect the frequency counter through a probe of high input im-
pedance (about 10 M ) and low capacity (10 pF or less).
Confirmation Method:
1) Confirm that the frequency is 4,433,619 ± 96 Hz
2) Confirm that the amplitude is 500 ± 200 mVp-p.
4,433,619
7-4
PB
Alignment tape SP color bar
Pin %ª of IC201
Frequency counter, Oscillo-
scope
4,433,619 ± 96 Hz
500
96 Hz
Fig. 7-2-7.
200
mVp-p