Adjusting Sequence; Power Supply Adjustments; Power Supply Check; Adjustment - Sony SLV-ED10ME Service Manual

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2-1-6.

Adjusting Sequence

Make the electrical adjustment in the following sequence.
Power supply adjustment

Servo system adjustment

Audio system

adjustment

2-2.

POWER SUPPLY ADJUSTMENTS

2-2-1.

Power Supply Check

HS-921SF/921SF1 BOARD,
SR-708/718 BOARD
Mode
Measuring Instrument
–10 V check
Measurement Point
Specified Value
+6 V check
Measurement Point
Specified Value
TE
L 13942296513
+13 V check
Measurement Point
Specified Value
+35 V check
Measurement Point
Specified Value
Checking Method:
1) Confirm that each voltage meets its specified value.
2-2-2. +6 V Adjustment
HS-921SF/921SF1 BOARD,
SR-708/718 BOARD
Mode
Measuring Instrument
Measurement Point
Adjusting Element
Specified Value
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Tuner system
adjustment


E-E
Digital voltmeter
Pin 9 of CN201
–9.5 ±0.8 V
Pin 7, 8 of CN201
5.9 ± 0.2 V
Pin 2, 3 of CN201
13.8 ± 1.2 V
Pin 1 of CN201
35.0 ± 3.0 V


REC or PB
Digital voltmeter
Pin 7, 8 of CN201
RV201 (HS-921SF/921SF1
BOARD)
VR201 (SR-708/718
BOARD)
5.9 ± 0.2 V
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2-3. SERVO SYSTEM ADJUSTMENT
2-3-1.

RF Switching Position Adjustment

(MA-350 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
Signal
Measurement Point
Measuring Instrument
Specified Value
Adjusting Method:
1) Connect MA-350 board JS450 to the GND for about 1 second
to activate the RF switching position adjustment mode.
2) Check appear "A P" on FL display.
3) Using the channel + and – buttons, adjust to 6.5 ± 0.5 H.
4) Press the pause button.
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3 6 7 1 3
CH1
CH2
enlargement
CH1
CH2
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7-2
2 9 9 4 2 8
PB
Alignment tape SP mode
color bar
CH1: Pin 2 of CN203
CH2: Pin 3 of CN203
(RF SWP)
Oscilloscope
6.5 ± 0.5 H (416 ± 32 µsec)
PAL
6.5 ± 0.5 H (410 ± 32 µsec)
NTSC
1 5 0 5 8 2 9 9 4
Approx. 1 Vp-p
Approx. 5 Vp-p
V
Vertical sync. signal
6.5 ± 0.5 H
(416 ± 32 µsec) PAL
(410 ± 32 µsec) NTSC
Fig. 7-2-3.
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9 9
2 8 9 9