Read Sony SLV-GA35MK2 / SLV-GA36 / SLV-GA45AV / SLV-GA55MK2 / SLV-GA59 / SLV-GF85MK2 / SLV-GF86 / SLV-SA34 Service Manual online
6-2
2-1-6.
Adjusting Sequence
Make the electrical adjustment in the following sequence.
Checking power supply
Servo system adjustment
Audio system adjustment
2-3.
SERVO SYSTEM ADJUSTMENT
2-3-1.
RF Switching Position Adjustment
(MA-366 Board)
(MA-366 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.
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
color
bar
Measurement Point
CH1: VIDEO LINE OUT
CH2: Pin 3 of CN202
(V SWP)
CH2: Pin 3 of CN202
(V SWP)
Measuring Instrument
Oscilloscope
Adjusting Element
RV101
Specified Value
6.5 ± 1.0 H (416 ± 60 µsec)
PAL
PAL
6.5 ± 1.0 H (413 ± 60 µsec)
NTSC
NTSC
Adjusting Method:
1) Connect MA-366 board JS401 to the GND for about 1 second
1) Connect MA-366 board JS401 to the GND for about 1 second
to activate the RF switching position adjustment mode.
2) Check that D403 and D405 mutually flash on and off quickly.
3) Check that switching position is 6.5 ± 1.0 H.
4) If not meet the specified value, turn RV101 and repeat steps 3
3) Check that switching position is 6.5 ± 1.0 H.
4) If not meet the specified value, turn RV101 and repeat steps 3
to 4.
Fig. 6-2-3.
Mode
E-E
Measuring Instrument
Digital voltmeter
+12 V check
Measurement Point
Collector of Q604
Specified Value
12.0 ± 0.3 V
+5 V check
Measurement Point
Pin 7 of CN001
Specified Value
5.0 ± 0.25 V
+9 V check
Measurement Point
Emitter of Q604
Specified Value
9.0 ± 0.3 V
MTR12 V check
Measurement Point
Pin 4 of CN001
Specified Value
12.0 ± 0.3 V
2-2.
POWER SUPPLY ADJUSTMENT
2-2-1.
Power Supply Check
(MA-366 Board)
(MA-366 Board)
Checking Method:
1) Confirm that each voltage meets its specified value.
1) Confirm that each voltage meets its specified value.
Approx. 1 Vp-p
Approx. 5 Vp-p
V
enargement
CH2
CH1
CH2
CH1
Vertical sync. signal
6.5
±
1.0 H
(416
±
60
µ
sec) PAL
(413
±
60
µ
sec) NTSC
Click on the first or last page to see other SLV-GA35MK2 / SLV-GA36 / SLV-GA45AV / SLV-GA55MK2 / SLV-GA59 / SLV-GF85MK2 / SLV-GF86 / SLV-SA34 service manuals if exist.