Sony DSR-2000A, Service Manual

Page: 208 / 234

8-12
DSR-2000A/2000AP
8-4. Tape Path Adjustment Confirmation
Be sure to perform tracking adjustment described in Section 8-3 after performing
the tracking adjustment in Section 8-2.
Basic knowledge
To perform tracking adjustment using the alignment tape (XH2-1AST), refer to
the following items.
.
For the procedure to enter the maintenance menu, refer to Section 5-2-2.
. For the procedure to exit the maintenance menu, refer to Section 5-2-3.
. For the operating procedure of the maintenance menu during the tracking adjust-
ment, refer to Section 8-1.
Tools
.
Alignment tape, XH2-1AST : 8-967-999-02
. Tape path adjustment board, DJ-461 : J-6444-610-B
. Dual trace oscilloscope
Check procedure
1. Connect the oscilloscope as follows :
CH-1 :
TP2 / DJ-461
CH-2 : TP3 / DJ-461
TRIG : CH-2
2. Insert the alignment tape XH2-1AST on the VTR.
3. Put the unit into PLAY mode.
4. Adjust the variable VOLTS/DIV control of the
oscilloscope so that the maximum amplitude of the RF
waveform becomes the three DIVISIONs on the
oscilloscope.
5. Measure the minimum amplitude of the RF waveform,
and confirm that the amplitude difference between the
maximum and the minimum of the RF waveform
satisfies the specification.
6. Confirm that fluctuation of the RF waveform satisfies
the specification.
4/5 Div
max.
min.
3 Div
Specification : max. _ min. < 4/5 Div
3 Div
Fluctuations
Specification :
4/5 Div
or less
Fluctuation ( ) with in
4/5 divisions or less.