Sony DSR-570WS Service Manual page 190

7-3-4. Tracking Adjustment
Equipment and Tool
. Alignment tape, XH2-1AST
. RF extension tool
. Oscilloscope
Setting
1. Connect the RF extension tool to CN775 of RP-
91 board.
2. Connect the oscilloscope as follows.
CH1: RF/RF extension tool (RF waveform)
CH2: JSW/RF extension tool (Switching
waveform)
Trigger: CH2
3. Select maintenance menu No. 604-10, center ITI
mode for tracking adjustment.
(Refer to Section 7-2.)
4. Insert an alignment tape into the unit.
Adjusting Method
1. Set the unit in PLAY mode.
2. Adjust the RF waveform on the entrance side to
become flat by turning the flange of the TG-3
guide.
3. Turn the flange of the TG-3 guide 180d
counterclockwise, and check to see that the
number of peaks of the RF waveform on the
entrance side meets the specification.
(Refer to Fig. 1)
4. If the number of peaks does not meet the
specification, perform the following adjustment;
* In case the number is 1.5 or more
Turn the flange of the TG-2 guide clockwise so
that the number of peaks meets the specification.
* In case the number is 0.75 or less
Turn the flange of the TG-2 guide
counterclockwise so that the number of peaks
meets the specification.
5. Adjust the RF waveform on the entrance side to
become flat by turning the flange of the TG-3
guide clockwise. (Refer to Fig. 2)
m
. Be sure to finish the adjustment by turning the
flange of the TG-3 guide clockwise.
. If turning the flange of the TG-3 guide clockwise
too much, return the flange back to the original
position and re-start the adjustment. Finish it by
turning the flange clockwise.
7-10
TG-1 guide
TG-3 guide
TG-6 guide
〈 Specification that the number of peaks of the RF waveform
on the entrance side 〉
0.5 Peak
0.25 Peak
~
0.75 Peak
(0.5 Peak + 0.25 Peak = 0.75 Peak)
Specification : 0.75 Peak ~ 1.5 Peak
<RF waveform>
Entrance
TG-2 guide
TG-4 guide
TG-4 tilt adjustment
screw (Do not rotate)
TG-5 guide
TG-5 tilt adjustment screw
(Do not rotate)
0.25 Peak 0.5 Peaks
0.25 Peak
1.5 Peak
(0.25 Peak + 0.5 Peak + 0.5 Peak
+ 0.25 Peak = 1.5 Peak)
Fig-1
Exit
Normal
Fig-2
DSR-570WS/570WSP V1