Adjusting Sequence; Power Supply Adjustment; Power Supply Check; Servo System Adjustment - Sony SLV-KS1 Service Manual

2-1-6.

Adjusting Sequence

Make the electrical adjustment in the following sequence.
Checking power supply

Servo system adjustment

Audio system adjustment
2-2.

POWER SUPPLY ADJUSTMENT

2-2-1.

Power Supply Check

(MA-370 Board)
Mode
Measuring Instrument
D +6 V check
Measurement Point
Specified Value
Mode
Measuring Instrument
SW +12 V check
Measurement Point
Specified Value
SW +5 V check
Measurement Point
Specified Value
MTR 12 V check
Measurement Point
Specified Value
Checking Method:
1) Confirm that each voltage meets its specified value.
STANDBY
Digital voltmeter
Corrector of Q607
5.56 to 6.25 V
E-E
Digital voltmeter
Pin 2 of IC601
11.7 to 12.3 V
Emitter of Q607
4.8 to 5.4 V
Corrector of Q605
12.5 to 14.5 V
2-3. SERVO SYSTEM ADJUSTMENT
2-3-1.

RF Switching Position Adjustment

(MA-370 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
Adjusting Element
Specified Value
Note: RMT-V266A (1-418-694-11) or
RMT-V266B (1-418-695-11)
Adjusting Method:
1) Connect MA-370 board JS401 to the GND for about 1 second
to activate the RF switching position adjustment mode.
2) Check that the Power LED flash on and off.
3) Using the channel + and – buttons on the remote commander,
adjust to 6.5 ± 0.5 H.
4) Press the pause button.
CH1
CH2
enargement
CH1
6.5 ± 0.5 H
(410 ± 32 µsec)
CH2
6-2
PB
Alignment tape SP mode
color bar
CH1: VIDEO LINE OUT
CH2: Pin 3 of CN270
(RF SWP)
Oscilloscope
Remote commander (Note)
6.5 ± 0.5 H (410 ± 32 µsec)
Approx. 1 Vp-p
Approx. 5 Vp-p
V
Vertical sync. signal
Fig. 6-2-3.