7-2
2-1-6.
Adjusting Sequence
Make the electrical adjustment in the following sequence.
Checking power supply
Servo system adjustment
Audio system
adjustment
Tuner system
adjustment
2-3.
SERVO SYSTEM Adjustment
2-3-1.
RF Switching Position Adjustment
(MA-323 Board)
Purpose:
Adjust the interval between A ch and B ch of tape playback out-
put.
Improve the interchangeability with other tapes and sets.
When it is out of order, the interval appears on the screen, the
screen is disturbed.
Mode
PB
Signal
Alignment tape SP mode
color bar
Measurement Point
CH1: VIDEO LINE OUT
CH2: Pin
2
of CN501
(RF SWP)
Measuring Instrument
Oscilloscope
Specified Value
6.5 ± 0.5 H (410 ± 32 µsec)
Adjusting Method:
1) Connect MA-323 board JS140 to the GND for about 1 secont
to activate the RF switching position adjustment mode.
2) Check appear “A P” on FL display.
3) Using the c and – buttons, adjust to 6.5 ± 0.5 H.
4) Press the pause button.
Fig. 7-2-3.
Mode
E-E
Measuring Instrument
Digital voltmeter
–10 V check
Measurement Point
Pin
9
of CN600
Specified Value
–10.3 ±0.8 V
+6 V check
Measurement Point
Pin
7
,
8
of CN600
Specified Value
5.9 ± 0.2 V
+13 V check
Measurement Point
Pin
2
,
3
of CN600
Specified Value
13.3 ± 0.5 V
+35 V check
Measurement Point
Pin
1
of CN600
Specified Value
38.0 ± 3.0 V
2-2.
POWER SUPPLY ADJUSTMENT
2-2-1.
Power Supply Check
HS-921SF/921SF1 BOARD,
SR-708 BOARD
Checking Method:
1) Confirm that each voltage meets its specified value.
2-2-2.
+6 V Adjustment
HS-921SF/921SF1 BOARD,
SR-708 BOARD
Approx. 1 Vp-p
Approx. 5 Vp-p
V
enargement
CH2
CH1
CH2
CH1
Vertical sync. signal
6.5
±
0.5 H
(410
±
32
µ
sec)
Mode
REC or PB
Measuring Instrument
Digital voltmeter
Measurement Point
Pin
7
,
8
of CN201
Adjusting Element
RV201
Specified Value
5.9 ± 0.2 V
(
)
(
)
Summary of Contents for SLV-ED1PL
Page 6: ...1 2 ...
Page 7: ...1 3 ...
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Page 9: ...1 5 ...
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Page 11: ...1 7 ...
Page 12: ...1 8 ...
Page 13: ...1 9 ...
Page 14: ...1 10 1 10 E ...
Page 19: ...SLV ED1 ED4 ED7 ED8 3 1 3 2 SECTION 3 BLOCK DIAGRAM 3 1 OVERALL BLOCK DIAGRAM ...
Page 23: ...SLV ED1 ED4 ED7 ED8 3 10 3 9 3 5 AUDIO BLOCK DIAGRAM ...
Page 24: ...SLV ED1 ED4 ED7 ED8 3 12 3 6 TUNER BLOCK DIAGRAM 3 11 740m Vp p 24 576 MHz IC1 REC PB ...
Page 25: ...SLV ED1 ED4 ED7 ED8 3 14 3 13 3 7 MODE CONTROL BLOCK DIAGRAM ...
Page 26: ...SLV ED1 ED4 ED7 ED8 3 16 E 3 8 POWER BLOCK DIAGRAM 3 15 ...
Page 28: ...SLV ED1 ED4 ED7 ED8 4 3 4 4 4 1 FRAME SCHEMATIC DIAGRAM FRAME ...
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