Sony HDW-750 Maintenance Manual page 434

8-2. Tape Run System Adjustment
4. Video tracking recheck
Recheck the video tracking by performing steps 1
and 2 of the check procedure.
5. Tape run check
Check the tape running status (drum entrance
side) following Section 8-2-1.
Drum exit side
6. Tracking adjustment at drum exit side
(1) Play back HR2-1A (from 15 : 00 to 20 : 00).
(2) Loosen the set screw on top of the T1 guide
with the screwdriver (tool) TG adjustment.
(3) Rotate the upper flange of the T1 guide
counter-clockwise using the screwdriver
(tool) TG adjustment until the 1 to 2 peaks
are created in the RF waveform as shown.
Check the followings at this time.
. There does not exist clearance between the
upper flange of the T1 guide and the top
edge of tape.
. There exists clearance between the lower
flange of the T2 guide and lower edge of
tape.
(4) Rotate the upper flange of the T1 guide
clockwise until the RF waveform becomes
almost flat.
(5) Set the switch S402/MDC-13 board (side B)
to ON.
Then D404 turns on and operation of the
TRACKING control knob is enabled.
(6) Play back HR2-1A (from 15 : 00 to 20 : 00).
(7) Rotate the TRACKING control (RV401) so
that the center of the RF waveform is reduced
to about 80% of the maximum amplitude.
(8) Rotate the upper flange of the T1 guide for
fine adjustment until the specifications 1 to 3
are satisfied.
(9) Tighten the set screw on top of the T1 guide.
Standard tightening torque :
10 x 10 _2
N.m (1.0 kgf.cm)
8-30
REC A PB
(ch 1)
Tape runs while
keeping contact with
the upper flange.
Drum
T1 T2
Tape runs while
Drum rabbet guide
keeping contact with
the lower flange.
RF waveform
(Flattering at top) 1 to 2 peaks
Pinch roller assembly
Tape runs while
Capstan
keeping contact with
the upper flange.
T3 T4 T5
HDW-750/750CE V1