Sony DVCAM DSR-60, Service Manual

Page: 227 / 324

7-7 DSR-80/80P/60/60P
7-3. TAPE PATH ADJUSTMENT
(CHECKING AMOUNT OF TAPE CONTACT WITH TOP FLANGES AT EXIT SIDE)
Required tools
Alignment tape XH2-1AST : 8-967-999-02
Tape guide adjustment driver : J-6440-850-A
Dental mirror : J-6080-029-A
Dual trace oscilloscope
Nutdriver (width across flat 4.5 mm) : 7-700-751-01
Check procedure
1. Connect an oscilloscope as follows:
CH-1 : TP104/RP-103 board (D-1)
TP302/RP-101 board (D-1)
CH-2 : TP207/SV-184 board (F-1)
TRIG : CH-2
2. Set the alignment cassette XH2-1AST (standard
cassette) on the VTR and place a weight on a cassette
so that a cassette is securely fixed in position.
3. Enter the PLAY mode.
4. Confirm that there are clearances between tape
edge and top flange (“
A
” portion) of TG-5, and
between that and top and bottom flanges of
TG-6. (“
B ” and “ C ” portions) (Fig.-1)
5. Confirm that the amount of tape contact at exit is
in the specification. (Fig.-2)
< If the specification is not satisfied > (Fig.-3)
a) When the amount of tape contact is smaller
(when numbers of peak are smaller than
specification)
Turn the AZ screw of TG-6 counter-
clockwise.
Confirm that there are clearances at “
A
” and
“
B
” of TG-5 and TG-6.
b) When the amount of tape contact is too much
(when numbers of peak are more than
specification)
Turn the AZ screw of TG-6 counter-
clockwise.
Confirm that there are clearances at “
C ” of
TG-6.
Note : Start counting the numbers of peak
after the tape run is fully stabilized.
6. Turn the top flange of TG-6 clockwise until the
RF waveform becomes the waveform as shown
in Fig.-4.
7. Tighten the fixing screw of TG-6 lightly.
Note : Never press TG-6 downward strongly.
8. Press
[EJECT]
key and remove the weight of
cassette and alignment tape.
DSR-60/60P
DSR-80/80P
TG-6 TG-5
Head drum
A B
C
AZ screw
Fixing screw
AO screw
TG-6
Q = 90 to 100 %
Fig.-1
<Amount of tape contact at exit>
Specification : Numbers of peaks are two or three when there
are clearances between tape and TG-5’s top
flange, and between tape and top and bottom
flanges of TG-6.
Fig.-2
Fig.-3
Fig.-4
Amount of tape contact at exit
Two peaks Three peaks
to